Antarctica’s Looming Threat

Ocean waters warmed by climate change could open the door for marine invasive species in one of the world’s most pristine ecosystems.

Hundreds of scientists journey to Antarctica each year to work in the continent’s 77 research stations, used by some 30 countries. Many are there to study how the unique ecology and endemic wildlife in this faraway land is changing with human pressures like climate change.

These scientists, along with the 50,000 tourists and dozens of fishing boats in the offshore waters, pose a threat themselves: accidentally providing passage to nonnative species. Antarctica and its waters have remained relatively isolated, thanks to its distance from other places, frigid temperatures and ocean currents.

But in recent decades an increase in human traffic and pressures from climate change are opening the door for invasive species — those nonnatives that can rapidly spread, outcompeting native plants and animals, or become unchecked predators.

So far 11 nonnative invertebrates, including mites and an earthworm, have established themselves on the warmer parts of the continent.

In the water it’s a slightly different story.

A 2019 study in Global Change Biology reported five nonnative species in the coastal waters, including a Chilean mussel and a crab. But so far none of these visitors has established populations. And scientists are urging vigilance to keep it that way.

“For now, Antarctica and the Southern Ocean remain the least invaded marine regions on the planet and represent humanity’s last chance to demonstrate that we can manage and mitigate the risks of invasive species at a continental scale,” Arlie McCarthy, a researcher with the British Antarctic Survey and lead author of the study, wrote in an op-ed for The Conversation. “If we do not, climate change will open the door to the world and our neglect will transform the iconic ecosystems we love.”

Staving Off Invaders

Natural forces are Antarctica’s best protection. The ocean current that churns off its shores, known as the Antarctic Circumpolar Current, pushes floating species away from the continent. That defense is buoyed by cold water that makes survival extremely difficult for nonnative species, who aren’t especially adapted to the environment.

Sea ice creates another barrier to movement, with less than one-seventh of the coastline ice-free in summer and none of it ice-free in winter.

“Individuals that manage to cross the Polar Front are confronted with ice in all its forms, freezing temperatures, physical disturbance from icebergs, and strong seasonal variation in light availability and water chemistry,” researchers explained in the Global Change Biology study. “These extreme conditions often sit at or are beyond the physiological limits of potentially invading marine species.”

This natural shield, however, is being weakened by climate-change-warmed waters.

“Changes in physical factors (decreasing ice cover, increasing water temperature) will, if unchecked, in time create an environment more hospitable to nonnative species and less hospitable to native species, reducing the resistance of Antarctic ecosystems (Antarctic biodiversity) to establishment of nonnative marine species,” wrote the researchers.

Most marine species are likely to arrive on the hulls of ships, known as biofouling, although researchers note that microplastics could be a future concern.

Ships arrive from ports all over the world — some even making the journey from Arctic to Antarctic, which could carry some cold-loving organisms with them. While tourist ships usually only dock at each port for a few hours, research and resupply vessels can linger for weeks, providing ample time for stowaways.

Two people holding cameras face penguin in the snow. — Visitors in Antarctica. Photo: Ian Duffy, CC BY-NC 2.0 DEED

More than 180 ships were involved in more than 500 voyages active in the area between 2017 and 2018 — a big jump from the 30 vessels and 75-100 voyages in 1960. Fishing boats and those carrying researchers or their supplies create other opportunities.

Although it’s difficult with ocean currents, new species could arrive in the Southern Ocean and Antarctica by rafting on aggregates of algae. Millions of these so-called kelp rafts are afloat in the Southern Ocean.

“We found nonnative kelps, with a wide range of ‘hitchhiking’ passenger organisms, on an Antarctic beach inside the flooded caldera of an active volcanic island,” wrote researchers in a 2020 study in Scientific Reports. “This is the first evidence of nonnative species reaching the Antarctic continent alive on kelp rafts.”

Of the four “passenger” species found alive on the nonnative kelp, the most concerning, they said, is Membranipora membranacea, a kind of bryozoan invertebrate that can form across seaweed, limiting its ability to reproduce and grow.

The warmer waters inside the caldera may have proved a tolerable temperature, while much of the surrounding coastal waters are too cold — at least for now.

Growing Risks

If nonnative marine species do begin to establish themselves in the Southern Ocean, their impact can ripple across the food web, a forthcoming study concluded.

“We found that these invasive species can actually cause really catastrophic declines in native species abundances,” says lead author Oakes Holland, a postdoctoral research fellow with Securing Antarctica’s Environmental Future, an initiative of the Australian Research Council. “Things like mytilid bivalves can reproduce quickly and just smother all the hard surfaces on the bottom of the ocean, which will push other species out.”

Northern Pacific seastars (Asterias amurensis), known to be voracious predators, are another concern. So too are crabs, a “niche of predator that has been absent from the region for millions of years,” she says.

Close up of purple sea start. — Asterias amurensis. Photo by Dean Franklin, CC BY 2.0 DEED

While Holland’s work has identified species to be wary of, she cautions that what we don’t know is even more problematic. The icy waters of the Southern Ocean are difficult to study. “At the moment, it’s just such an enormous area and it’s so hard to even know where to start looking,” she says.

There’s not much known yet about what organisms are being carted along on ship hulls either. Current research on nonnative marine species comes from studying just seven ships, including a confiscated illegal fishing vessel.

“We’re very much in the infancy stage of understanding where the biggest risks are going to come from, specifically on ships, and then how best to manage them in a way that’s not going to be economically limiting,” she says.

Visiting scientists could be part of the problem — and solution.

When underwater drones and submersibles are deployed for research, the collected data could be mined using machine learning to search for nonnative species, she says. Researchers have also recommended using environmental DNA, the genetic material shed by organisms into the air or water, that can help detect a species’ presence in the environment even when it hasn’t been seen.

And although the coastal waters of the continent are vast, efforts to ramp up biosecurity should focus on the most highly visited locations that are likely to be “invasion hotspots” — like the Antarctic Peninsula and the South Shetland Islands, say researchers.

The threat of invasive species is only one of the mounting pressures facing Antarctic wildlife, including warming waters, melting sea ice, ocean acidification and pollution. But broad conservation actions, like increasing marine protected areas, could help on all fronts.

“I think when people are thinking of Antarctica, they’re not necessarily thinking of ugly little worms on the seafloor,” says Holland. “They’re thinking of penguins and seals and whales. So if we get marine protected areas for emperor penguins, for example, then everything that lives underneath that is going to benefit.”

Previously in The Revelator:

Action for Antarctica: Saving the World’s Last Great Wilderness

A Year to Remember…for Wildlife

In 2023 wild animals stretched boundaries, set records, and inspired conservation across the world.

It’s tradition to honor the past year’s human achievements. From peacemakers and scientists to athletes and artists, we celebrate those who inspire us. But what about the wildlife who surround us who make up the biodiversity that sustains us? Each year standout members of those populations also set records and push boundaries, many with lasting results.

Consider P-22, also known as the “Hollywood cat.” In 2012 this young mountain lion surprised biologists and captured hearts by establishing a decade-long residency in the Griffith Park area of Los Angeles. Stealthily threading through backyards and freeways, he demonstrated the value of landscape connectivity, even in urban areas. And though he died in 2022, he inspired a massive fundraising campaign that helped build the largest wildlife bridge in the United States, to be completed in 2025 over California’s 10-lane Highway 101. In this way he changed the world.

Other animal pioneers accomplished similarly remarkable feats in 2023. Ocelots, grizzlies and many more used their innate skills and courage to recover lost territory, expand their ranges, or simply survive against the odds. Some were helped by human actions like stream restoration, while others, like P-22, created opportunities to deepen scientific knowledge and inspire conservation.

Here are some of their stories.

Grizzlies Edge Toward the Plains

This year multiple media reports illustrated how young grizzly bears continue to disperse beyond present-day populations in Montana — even to the brink of the Great Plains. Last July, following years of rumors, biologists confirmed evidence of one or two grizzlies both north and south of Interstate 90 in south-central Montana. And in November, a trail cam 200 miles to the north captured a lone grizzly in the Missouri River Breaks region of north-central Montana. It’s the first confirmation of grizzlies in any of these near-plains areas since their extirpation more than a century ago.

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Grizzly bears knocking at the door of the Great Plains is a big deal. For most of the 20th century, western Montana hosted three isolated fragments of the West’s original grizzly bear population. Separated by vast distances and dangerous roads, the precarious holdouts centered around the Yaak River and Yellowstone and Glacier national parks, where the bears became associated with remote mountains. But before their extirpation, grizzlies had roamed the West’s deserts, coasts, forests and the Great Plains grasslands, where no one knows how far east they wandered.

Decades of intentional conservation serve as the backstory here. First, the 1973 Endangered Species Act mandated restoring grizzly habitat in the pockets where they survived. The work slowly helped grizzlies rebound, and today they increasingly tease crossing between recovery areas, long a holy grail of recovery efforts.

Second, changing attitudes and conservation outside of the recovery areas have laid groundwork for resumed human-grizzly cohabitation. For instance, the loner in the Missouri Breaks was on ranchlands owned by American Prairie, which since 2016 has restored habitat and introduced bear-friendly livestock practices.

And grizzlies aren’t the only creatures coming home again.

California’s Trendsetters

California was another scene of wildlife accomplishments last year. It started in May, when skiers aboard a Mammoth Mountain Ski Area gondola spotted a wolverine loping across a ski run. Lope turned to sprint as a skier, who likely never saw the animal, launched off a nearby jump. After additional reports, wildlife officials confirmed it was the first known wolverine in the region in 101 years. It’s the latest report of wolverines reoccupying historical ranges in California, Oregon, Washington and Alberta, Canada. The news came just in time for wolverines to finally make it onto the endangered species list after years of effort by conservationists.

Next, August brought news that wolves have established a pack in the southern Sierras for the first time in over a century. Genetic testing of scat found one of the females is a direct descendant of OR7, a young male disperser who in 2011 famously became the first wild wolf to enter California since the early 1900s. Ecologists believe conditions created by the 2021 Windy Fire influenced the new pack’s habitat selection.

Then, in September, six California condors repeatedly ventured north from their Pinnacles National Park homeland to Mount Diablo in the San Francisco Bay area, becoming the first condors seen in that area in over a century. Biologists speculate the sorties may indicate new nesting territories. Condors, who strongly favor undeveloped spaces, survive today because of a captive-breeding program and a California ban on hunting with leaded ammunition. Two of the Bay Area individuals had previously been treated for lead poisoning, while another was trapped to remove an aluminum can from his beak — a reminder of humans’ role in preserving this species.

The Pink Wave

Lots of birds survive hurricanes. But the flamingos who got sucked into Hurricane Idalia last August, and who then slingshot over 1,000 miles from their native Yucatan to the upper Midwest, deserve a special nod. Following the storm, dozens of them turned up in wetlands around Pennsylvania, Ohio and Wisconsin. By fall they appeared ready to migrate back south.

And while surviving a hurricane that throws you across the continent is noteworthy, there’s a deeper story. In 2018 a lone flamingo turned up in north Florida — well north of its current range — following Hurricane Michael. He’s still there, delighting birders who have nicknamed him Pinky. And before Pinky, Hurricane Allison in 1995 and Hurricane Agnes in 1972 also appear to have temporarily swept flamingos into north Florida. Like Idalia, the storms passed Cuba and the Yucatan, where the birds are abundant. The question now is whether last year’s wayward waders will return to Mexico or, like Pinky, settle into Florida — perhaps offering Pinky a mate.

If they choose the sunshine state, where they are rarely seen north of Tampa Bay, they could reclaim habitat that has been missing flamingos since the plumage trade of the early 1900s wiped them out.

Lil’ Jefe of the Borderlands

The ocelot caught on a game cam in Arizona’s Huachuca Mountains on July 4 is as much of a trooper as P-22. But instead of urban obstacles, this feline overcame ranchlands, roads, mining activities, USDA poison traps, and an increasingly fortified border wall, which has brought additional roads and deforestation. Nicknamed Lil’ Jefe — a nod to the famous jaguar known from the same region — his presence shows the habitat potential of the Sky Islands region but highlights the threats to wildlife from the growing wall.

Fewer than 100 ocelots may remain in the United States, mostly in Texas. Their U.S. population is the northern reach of a range that stretches south to Argentina. Biologists believe Lil’ Jefe, who was spotted just five miles north of the border, has appeared on game cams over 150 times since 2012. He’s the only known ocelot in Arizona and one of only five — all males — seen in the state since 2009. He likely dispersed from northern Mexico, a place he can’t return to and that others can’t migrate from, due to the wall.

Game cameras in the Sky Islands have also picked up ringtails, mountain lions, black bears and others, an indication of the region’s enormous potential and need for protection.

Honorable Mentions: A Hellbender Dad, Recovered Darter, and Marathon Beluga

On a human-dominated landscape, sometimes simply reproducing is a bold achievement. So cheers to the endangered Ozark hellbender dad who in 2023 became the first captive-bred giant salamander known to reproduce in the wild. Raised at the Saint Louis Zoo, he was collected as an egg in 2013 and released near Missouri’s Current River in 2019.

Congratulations to the Okaloosa darter, a small, green-yellow fish who graduated in 2023 from the Endangered Species List. The darter was listed in 1973 and its recovery was aided by conservation work at Florida’s Eglin Air Force Base.

And welcome back to the extremely rare frosted elfin caterpillar, who turned up in abundance among wildflowers in the Montague Plains of western Massachusetts. The nonmigratory species suffers from decades of habitat loss, but officials credit the new population to habitat restoration that has also brought back whip-poor-wills, turkey, deer, and black bear.

And the beluga whale that swam over 500 miles up Alaska’s Yukon River gets recognition for showing that sometimes wildlife enjoy exploration as much as we do.

These mostly cheery tales do not reverse today’s sobering news on climate and biodiversity. But they do highlight both the resiliency of wildlife and the promise of conservation work.

For instance, the 1973 Endangered Species Act — which celebrated its 50th anniversary last month — provides critical protections for grizzlies, wolves, darters, and others. But the law wouldn’t amount to much if it weren’t for the hard conservation work conducted by dedicated humans, including pulling cans off condor beaks or restoring prairies and wetlands.

Technology helps, too. Hellbenders released into the wild, for instance, carry chips that biologists use to check on their wellbeing, while game cameras and genetic testing help document the advances of ocelots and others.

Even as wildlife around the world continues to face perilous and unprecedented declines, we can expect this blend of legal protections, human effort, and technology breed more encouraging stories in the year ahead.

Can Artificial Reefs Restore Corals and Protect Coastal Communities?

Researchers in Florida are testing an artificial reef planted with live corals.

Coral reefs support vibrant marine ecosystems, stimulate tourism and fishing industries, and protect shorelines from tropical storms and erosion. But reefs around the globe have been hit hard by pollution, overfishing and climate change, which is causing increasingly frequent and severe coral bleaching. Scientists predict severe bleaching on 99% of the world’s reefs within this century unless we reduce greenhouse gas emissions. Saving coral reefs requires major systemic changes — dramatic cuts in energy consumption, switching to renewable energy, managing overfishing and pollution, and restoring target reefs.

Restoration efforts have now become a priority for many scientists. This series looks at some of those efforts.

The University of Miami’s Rosenstiel School of Marine, Atmospheric, and Earth Science sits on the shore of Florida’s Virginia Key. Most of its buildings have views of the water. One of them even houses its own ocean.

This boxy wind-wave tank, part of the Alfred C. Glassell, Jr. SUSTAIN Laboratory, is 60 feet long, 7 feet tall, and 23 feet wide. A jet engine creates winds up to 170 mph and mechanical paddles make waves; putting the two together can simulate a Category 5 hurricane. The tank is clear on all sides, high enough to walk under, and strong enough for scientists to sit on top so they can monitor the action inside.

A multidisciplinary team at the university is using this tank to study how artificial reef structures stand up to wind and waves and how well live corals planted on those structures survive and grow. This work could lead to a unique combination of “grey” or human-built infrastructure, such as concrete seawalls, and “green” or natural systems like coral organisms — resulting in systems that provide both shoreline protection and coral reef habitat. A collaboration between the university and the city of Miami Beach, the project is called Engineering Coastal Resilience Through Hybrid Reef Restoration, or ECoREEF.

Florida is the only state in the continental United States with a shallow coral reef near its coast, extending some 350 miles from the Dry Tortugas at the tip of the Keys in the Gulf of Mexico to north of Palm Beach. Studies show that shallow coral reefs can buffer up to 97% of the energy from waves, reducing flooding and helping to prevent loss of life, property damage, and erosion from storms. But nearly 90% of corals on this reef have died due to climate change, hurricanes, disease and human development. Add in South Florida, with its low-lying typography and its location within the tropical storm belt, the result is a heavily populated coastline extremely vulnerable to the effects of climate change.

Waves splashing inside a tank. — A simulated ocean tank helps researchers study how coral reefs affect waves. Photo: University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science

ECoREEF joins other projects, some decades-long, working to restore Florida coral reefs, which provide habitat for hundreds of marine species — including green sea turtles, parrotfish and stingrays — while supporting the state’s tourism industry and protecting its shorelines and structures from wave energy. The reef-restoration efforts include studying the idea of moving hardier corals into degraded areas, outplanting hand-raised coral fragments onto existing reefs, coaxing corals to reproduce sexually in laboratories, and boosting natural sexual reproduction of the organisms in the wild.

“The idea behind ECoREEf is installation of structures that can host corals but also provide wave energy dissipation,” says Landolf Rhode-Barbarigos, an associate professor in the College of Engineering.

After testing designs in the tank, in March the team deployed two types of structures in 14 feet of water about 750 feet off the shore at Miami Beach. One design is a hollow trapezoid structure with limestone boulders on its outer surface to mimic the texture of coral reefs and attract marine life. The other is a configuration of hollow, hexagonal units perforated to let water flow through, called Sustainable Estuarine and Marine Revetments, or Seahives. Both are made of concrete.

It’s less expensive to test and alter a model in the tank than an actual structure out in the ocean, says Brian Haus, chair of the Department of Ocean Sciences at the Rosenstiel School. Post-testing, models can be scaled up.

“The tank testing gives us a model that tells us this structure dissipates this much wave energy,” says Rhode-Barbarigos. “Then we use those findings combined with mathematical models to design structures that can withstand the actual waves.”

There’s increasing recognition that green infrastructure is an effective and cost-efficient alternative to gray infrastructure. But once green systems are lost or degraded, it can take a long time to restore them. The artificial infrastructure can help speed up that restoration.

The physical structures are well-developed at this point, but adding living coral makes the system much more complex — one reason for the multi-disciplinary nature of the project. “We’ve blurred the lines between ecology and engineering to think of not only optimizing the structures but what types of corals we use,” Rhode-Barbarigos says.

Light green coral fragment — A coral fragment three months after outplanting. Photo: University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science

He points out that data from the project can show the value of the combination. “It makes a different type of argument for coral restoration. If we can combine coral restoration and shoreline protection, we have a stronger argument.”

So far, the work clearly supports the argument of combining the two for shoreline protection. One study showed that coral structures — the calcium-based skeletons these organisms create — can significantly enhance the wave-reducing capability of an artificial reef, depending on sea conditions and characteristics of the structure. A trapezoidal artificial coral reef model was found to reduce up to 98% of the wave energy, with coral contributing an estimated 56% of the total. Additional testing found that adding skeletons of staghorn corals (Acropora cervicornis) mitigated up to an additional 10% of wave height and 14% of wave energy on submerged artificial reef compared to those without corals.

After the structures were placed in the water, marine scientists from the Rosenstiel School added live corals, including great star, mustard hill, knobby brain and symmetrical brain corals. These species all are stony corals, which can create massive reefs over time.

“On July 19, we outplanted about 500 corals, fragments we took from parent colonies and grew out either here at UM or at our offshore nurseries,” says Emily Esplandiu, a research associate in the school’s Coral Reef Restoration Lab. While many offshore coral nurseries hang staghorn coral fragments from PVC trees using monofilament, this lab uses an adhesive to affix corals to a plug that’s screwed into flat trays. The trays are easier to transport from the nursery to the testbed structure, she adds. Engineers are now incorporating the plug screws into the design of the artificial reef structures, making it easier to attach corals.

The team planned to outplant another 500 corals until extremely high temperatures hit Florida waters in late summer. The scientists instead found themselves bringing corals from their offshore nurseries into land-based facilities. “At temperatures of about 30.5 degrees Celsius (87 degrees Fahrenheit), we can’t outplant or move corals offshore,” Esplandiu says. The plan is to finish the planting by the end of this year, once temperatures fall below that threshold for at least a week.

Meanwhile, the scientists monitored the corals already on the structures, documenting about 80% survivorship. However, as temperatures continued to rise, on Aug. 17 the monitoring teams observed some paling (a precursor to bleaching), and on Sept. 8, they saw bleaching.

But there was some good news: The scientists observed differences in the amount of bleaching among species and genotypes within species. They plan to take a closer look to identify those least affected and use those hardier genotypes for future fragmenting and outplanting. For example, the original outplanting included four or more genotypes of star coral, Esplandiu says, and one genotype all bleached while another all remained healthy.

Haus notes that the ultimate goal is to create larger infrastructure to provide more protection. “Beach renourishment and dune reconstruction are no longer enough with sea-level rise,” he says. This effort could put corals in new areas as well as those that historically had reefs — good news for coastal residents and marine life.

Hand holding a ruler to measure coral underwater. — Coral monitoring. Photo: University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science

“People are realizing it’s a crisis, all of it — coral loss, climate change, sea level rise,” says Haus. “The goal is to develop solutions that are ecosystem friendly and indeed help the ecosystem. Of course, it won’t be enough if we don’t change. We need to stop the source of the problem because emissions are just going to get worse.”

For the Coral Reef Restoration Lab, the next step is to grow out thousands more coral fragments for planting on additional structures. Working with engineers to design structures that work better for the corals has been exciting, Esplandiu says. “We learned that corals do best with high water flow, because that flow brings nutrients. We know putting a coral on the top versus the side of a structure is different. We can work together to find literally the specific spot on a structure that is best to put corals.”

“Up until now, the only outplanting we had done was on the natural reef, which is mostly degraded in Florida,” Esplandiu says. “We see a lot of restoration sites crashing after three to five years because they’re facing the same stressors the corals were to begin with. The reef framework is the most important part of the reef, and we’ve lost so many corals that they’re no longer able to create that framework.”

Coral restoration efforts are something of a finger in the dike, scientists acknowledge, and ultimately won’t succeed without continued efforts to change the things that are causing coral loss in the first place, such as greenhouse gas emissions, overfishing and pollution.

But the test structures offer a way to replace some of the natural reefs that have been lost, and they provide an alternative to putting corals back onto degraded reefs. The team has already documented a large fish community around the test structures.

The combination of artificial reefs and stress-tolerant corals could contribute to restoring both the coastal protection and marine habitat provided by healthy natural reefs. In other words, work in the university’s indoor ocean is helping to heal the real ocean just outside its windows.

Previously in The Revelator:

Coral Reefs Are in Crisis. Could a Controversial Idea Help?

Why Dam Removal Is a Climate Solution

By providing both mitigation and adaption, dam removal can lower greenhouse gas emissions and restore carbon sinks.

As the climate crisis escalates, a huge amount of attention and money is being focused on climate solutions. These can be divided into two categories: solutions that pursue “mitigation,” which lowers greenhouse gas emissions, and those that pursue methods to adapt to climate impacts to increase human and ecological resiliency.

Dams, of course, create enormous environmental harms, many of which have already been described in scientific literature. Equally well documented is the fact that removing dams can restore seriously damaged ecosystems. But missing from almost every climate-solution story and study is how dam removal can be key for both mitigation and adaptation.

Here are 10 reasons why dam removal fights climate change:

1. Greenhouse Gas Emissions

Dam removal reduces greenhouse gas emissions, especially methane. An increasing amount of scientific evidence, including from the U.S. Environmental Protection Agency, indicates that dam/reservoir systems can be a significant methane emitter. In some cases, hydropower dam projects can emit as much total greenhouse gases as a coal-fired powerplant.

2. Natural Flows

Dam removal allows rivers to meander through their historic valleys, plains and forests. In so doing, rivers transport surrounding organic material, such as decomposed plants and soil, to sea. Once there, much of the material sinks to the bottom of the ocean, where it’s transformed and locked into rock formations. These river plumes, which can extend for miles into the ocean, are carbon sinks.

3. Carbon Sinks

Dam removal allows landscapes that have been flooded to regrow their native vegetation: also carbon sinks. In the United States alone, the largest 150 reservoirs submerge over seven million acres of land. In the Canadian province of Quebec, over 6 million acres of previously forested land is covered by reservoirs. Globally, there are likely over 100 million acres of land flooded by reservoirs.

Alewives returned by the millions after the Edwards and Ft. Halifax dams were removed in Maine. (Photo by John Burrows/ASF)

4. Biodiversity

One of most detrimental ecological impacts of climate change is the diminishment of biodiversity. The construction of dams and reservoirs exacerbate this loss of biodiversity by flooding riverine ecosystems that are biodiversity hotspots. Dam removal restores native biodiversity, a key climate adaptation strategy.

5. Forests

Healthy forests — especially old-growth forests — are key carbon sinks in many ecosystems of the world including the Pacific Northwest. Dam removal that restores the migration of anadromous fish, such as wild salmon, are key fertilizers for healthy forests as the fish swim upstream and die, replenishing the soil and ecosystem.

6. Sediment Transport

Climate change is causing rising sea levels that batter coasts and deplete beaches in California and across the planet. Dams block natural sediment from flowing to the sea; dam removal will allow sediment to reach estuaries and coasts where it can help provide the material to rebuild beaches. Sediment in river deltas can also help protect against salt-water encroachment, worsened by rising seas, in places like the Mississippi River Delta.

7. Fish Populations

In parts of the United States and elsewhere, dams have decimated fish populations that are a principle food source for local and Native peoples. Dam removal allows fish to naturally spawn, reproduce, and migrate along vast stretches of rivers. As climate change intensifies, freshwater river fish are increasingly important as a human food source.

Lake Mead water line — Falling levels visible in Lake Mead on the Colorado River. (Photo by Harshil Shah, CC BY-ND 2.0)

8. Water Supply

Reservoirs, large and small, allow vast amounts of water to evaporate off their surfaces, and this problem gets worse as temperatures rise. As just one example, in the drought- and overuse-plagued Colorado River in the southwest, it’s estimated that 10% of the entire flow of the river evaporates every year. Removing dams and storing water in underground aquifers makes water supplies more resilient in a warming world.

9. Climate Resilience

Climate change is intensifying extreme weather including rainfall, floods and melting glaciers. Most dams, large and small, were constructed to withstand a range of weather events that may no longer be the norm. Further, dams need an increasing amount of maintenance and repairs to withstand extreme floods. Recent massive floods in Libya and India that have caused large-scale dam collapses suggest that dam removal can increase the health and safety of downstream human settlements in the path of climate change.

10. Cooling Effect

As climate change causes the planet to warm, heat waves — especially in urban areas — cause heat stress and deaths. Not only do healthy flowing rivers provide a cooling effect to surrounding urban heat islands, but people increasingly use local rivers to stay cool on hot days. Dam removal ensures that rivers flow and stay cooler, cleaner, and healthier in a climate-changed world.

With more than 91,000 dams in the United States, it’s important to evaluate them all for removal as potential climate solutions. In many cases both mitigation and adaptation can be achieved in one single dam removal event. Few other climate solution projects of this breadth and magnitude exist.

While most other climate solutions involve building some type of structure or facility as a technical solution, dam removal involves tearing a structure down and letting natural ecological processes be restored. Such “nature-based solutions” that decrease the number of dams blocking rivers must be considered in the vast mix responses to the escalating climate crisis.

The opinions expressed above are those of the author and do not necessarily reflect those of The Revelator, the Center for Biological Diversity or their employees.

Previously in The Revelator:

Dam Accounting: Taking Stock of Methane Emissions From Reservoirs

How Low-Income Families Can Reap Rewards From Solar Energy

For families who can’t pay high upfront costs for solar energy, cooperatives offer a solution.

Rooftop solar has long been the preserve of the affluent. Solar adopters skew white and wealthy compared to the broader public, according to a report from Lawrence Berkeley National Laboratory.

The number of households installing solar across the country could be much higher, but millions of low-income homeowners don’t have enough capital to pay the upfront costs. While the price tag varies depending on location, incentives, and the type of solar panels, a typical 7-kilowatt rooftop solar system can cost between $17,400 and $24,000.

It can take many years to break even on that hefty investment, but since panels typically last for at least two decades and their costs are falling rapidly, homeowners can save thousands of dollars on their energy bills — if they can find that initial capital.

For those who can’t, there are some emerging alternatives. A growing movement of solar cooperatives is helping low-income households access those financial benefits, while decarbonizing the power sector.

Solar co-ops are groups of property owners who band together to build small solar projects for their communities. “It’s like putting panels on your own roof, except you put them somewhere else with a bunch of other people,” Dan Orzech, general manager at the Oregon Clean Power Cooperative, tells The Revelator.

Once installed, the electricity produced by the panels is injected into the grid and utilities pay for that power using a system called “net metering” that allows co-op members to slash their energy bills. Solar co-ops members own the solar arrays and can therefore take full advantage of federal and state incentives.

Building a solar co-op can be a daunting process that is often facilitated by organizations like Orzech’s and others including Co-op Power and the People’s Solar Energy Fund, to name a few.

One of the largest solar co-op organizers is Solar United Neighbors, which has helped 8,400 people across the United States install over 70 megawatts of solar capacity since 2007.

Solar doesn’t just come in handy during storms! We’ve seen how power can go out during extreme heatwaves, which is why a reliable resource like solar is especially important in hotter parts of the country! https://t.co/OMFhZODshK

— Solar United Neighbors (@SolarNeighbors) August 3, 2023

The nonprofit is seeing increased interest in solar co-ops because people want to lower their energy bills and “they’re concerned about the climate and the legacy they’re going to leave to their children and grandchildren,” says communications director Ben Delman.

But that’s not all. “Some people are also worried about the micro impacts of climate change, like what happens when a hurricane hits and the power goes out,” he says. “We’re seeing a lot of interest in Florida, because you can pair solar with batteries and keep the lights going when there is a blackout.”

Different Approaches

Solar co-op organizers follow different models, but they typically get a few dozen families together and help them negotiate a contract with solar installers that often offer bulk discounts. They also advise them on federal tax credits, as well as state and county-level solar incentives, and help them secure loans, grants, and other forms of funding from local governments and investors.

They also try to ensure that low- and middle-income families can gain access to solar energy. To that end, Cooperative Energy Futures in Minnesota doesn’t require credit checks or income verification “because that’s a barrier preventing a lot of low-income households to participate,” says Timothy DenHerder-Thomas, the organization’s general manager.

Their approach seems to be working: Between 38% and 50% of the approximately 700 people who subscribe to their solar projects are economically disadvantaged.

“Paying $25 or $30 less in your energy bill every month may not sound like much, but it’s money that you can use for groceries or medications,” he says. “It helps people who are struggling to make ends meet.”

The benefits spill over to nonmembers, too. For example, Cooperative Energy Futures tries to hire minority-owned companies to install solar panels. “There are also subcontractors and workforce development partners who are providing employment for Black and Brown workers,” DenHerder-Thomas adds.

Oregon Clean Power Cooperative follows a different approach based on community-based stock offerings that typically allow people who “want to see their money do something positive for the community” to invest around $7,000, Orzech says. The organization combines these investments with grants, tax credits, and donations to finance community solar and co-ops. Community solar projects are small solar farms owned by a third party and tend to offer fewer economic benefits but be ideal for renters.

The cooperative is now working on a solar project consisting of a 75 kW solar and battery system that will cut the power costs of low-income groups in the city of Talent, which was partially destroyed by the 2020 Almeda wildfire.

“This will allow them to lower their power bills by between 50% and 75%, but they will also be having some, albeit small, positive impact on the planet as a whole,” says Orzech. “I think it really gives people a new sense of power.”

The organization has also helped churches, libraries, schools, and at least one farm finance and develop solar projects. Its Oregon Shakespeare Festival Community Solar project was selected as a Sunny Awards winner by the U.S. Department of Energy for its efforts to increase access to clean energy among disadvantaged communities.

Ultimately solar co-ops could potentially help lower electricity prices for everyone because they tend to be in urban areas and don’t require expensive transmission infrastructure to distribute their power, says Crystal Huang, the cofounder of Oakland-based People Power Solar Cooperative.

The organization argues that the current system, under which utilities produce power and distribute it to households hundreds of miles away for a fee, is “inefficient, overpriced and unreliable” and has a huge environmental impact.

Instead, the People Power Solar Cooperative envisions using solar co-ops to create a not-for-profit decentralized energy system.

“Our relationship with energy doesn’t have to be just as consumers,” says Huang. “We can be part of cooperatives that own the energy and completely redesign what the energy system looks like.”

Boosting Efforts

Stakeholders say demand for solar co-ops is increasing rapidly, in large part thanks to efforts by the Biden administration to boost community solar generation from 3 gigawatts in 2020 to 20 gigawatts in 2025 and provide clean energy to five million families. This goal is part of the Justice40 Initiative, which seeks to ensure that disadvantaged communities receive 40% of the overall benefits of climate and clean energy investments.

Brown stucco house with rooftop solar panels — Rooftop solar in California. Photo: Thomas Hart, (CC BY-NC 2.0)

In addition, the Inflation Reduction Act passed last year provides community solar projects with a 30% tax credit and bonus benefits for projects based in low-income communities or Tribal lands.

“The Inflation Reduction Act is a game changer for solar in the United States,” says Orzech. “Before we had to find tax equity investors and sign Power Purchase Agreements. The same model that large solar investors were using but downsized to a community level. It was a lot of work, but this legislation makes it simpler to leverage tax benefits for community solar.”

Growing Threats

States like New York, Massachusetts, Minnesota and Illinois are also helping solar co-ops, thanks to net-metering rules that pay a fair price for surplus power generated by solar projects that gets put back into the grid, stakeholders say.

“You basically get a one-to-one credit. The value of one electron is equal to what utilities compensate producers for,” says Delman. “But some utilities are essentially monopolies. They don’t like competition from rooftop solar.”

That’s what’s happening in California, where investor-owned utilities recently lowered the price they pay for the solar power that residential solar projects inject into the grid by around 75% and introduced a monthly charge for rooftop solar owners. The discounted rate will only apply to future projects.

The changes effectively slash the incentives that drive solar growth and will likely put solar power out of reach for low-income people in the Golden State, Huang says.

“Utilities are stopping community solar, or local solar as a whole, because it threatens their very lucrative business model. It threatens their existence,” she says.

California isn’t alone. Scores of other states are reviewing their net-metering policies or adding charges and fees that effectively undermine the economic benefits of residential solar, and by extension solar co-ops.

The Carolinas, Indiana, Michigan, Arizona, Utah, and Louisiana have implemented these types of policies, while Arkansas, Idaho, Virginia, and Washington state are considering similar measures, says Autumn Proudlove, associate director for policy and markets at the North Carolina Clean Energy Technology Center.

“I think ultimately residential solar isn’t going to stop growing, especially with these incentives from the federal government, but these state policies are eroding the value to customers in the compensation that they receive,” she says. “It makes solar less accessible for low-income communities because it’s not as valuable under these new structures unless you add battery storage to your system.”

Luckily the costs of battery storage are also decreasing, thanks in part to tax benefits in the Inflation Reduction Act, while states such as Illinois, New Hampshire, and Maryland offer additional incentives.

As a result, residents and co-ops are both more likely to install batteries to use all the power produced by their panels, instead of injecting it into the grid at a discount.

“That’s my prediction,” says Orzech. “But let’s see what happens.”

Previously in The Revelator:

Solar Sovereignty: The Promise of Native-Led Renewables

‘Like a Dead Zone’: Undoing Decades of Environmental Harm on a California River

A major restoration effort by a coalition of Tribes and government agencies could help imperiled fish and other animals on the Trinity River.

In late September 2023, a one-mile stretch of the Trinity River in northern California looks and sounds like a construction site. Large yellow machines crawl across bare ground, the steady growl punctuated with warning beeps. Behind pyramids of stockpiled materials — mulch, gravel, logs — the river flows serenely.

Aldaron McCovey manipulates his excavator, using the back of the bucket to deftly smooth out fine material on a bare new bank.

“It was a little overcut, so we’re filling it in so that there’s no standing water,” he explains.

A fisheries restoration technician for the Yurok Tribe, McCovey is working on an ambitious restoration project called Oregon Gulch, just east of Junction City, Calif. Here, crews from the Yurok Tribe Construction Company are rerouting a straightened stretch of the Trinity River into a newly sculpted meander to help restore the river’s form and function.

Getting to a clean slate required moving mountains of cobbles and gravel — the legacy of 20th-century dredge mining. Seventy years ago, monstrous machines chewed through river and valley, funneling rocks, mud, sand and water into a sluice, extracting the gold and dumping the spoils behind in pile after pile after pile.

“This time last year we’d be standing on 30 feet of tailings,” says McCovey. “It was like a dead zone.”

In August 2022, a procession of trucks began transferring the tailings to a quarry half a mile down the road. In total, they have removed 580,000 cubic yards of material from the site — a staggering 30,000 truckloads.

Aerial view of river with tailings piles — Prior to restoration, the Trinity River at Oregon Gulch ran in a straight line and mountains of mining tailings blockaded the bank. Photo: Aaron Martin, Yurok Tribal Fisheries Department

Now large machines are once again moving through the valley, this time with the aim of creating floodplain habitat that will sustain young salmon before they migrate to the ocean.

“We have this nice meander, some deep holes and some off-channel habitat,” says McCovey. “I think it’s going to be great for fish.”

The project is part of the Trinity River Restoration Program, a long-term collaborative effort involving the Yurok Tribe, Hoopa Valley Tribe, and state and federal agencies to restore 40 miles of the Trinity River below Lewiston Dam. Oregon Gulch is the partners’ 40th project; it’s also the largest, and the first to take on the legacy of dredge mining at such a scale.

A River Turned Upside Down

The Trinity River originates in the granite Trinity Alps, flowing 165 miles before joining the Klamath River in Weitchpec, Calif. For thousands of years Indigenous peoples — ancestors of today’s Hoopa River and Yurok Tribes — fished the river.

Gold seekers first arrived in 1848; before long, they had set up mining operations on every bar of the river, using water wheels, diversion dams, water cannons and finally, large dredges to extract every ounce of precious metal.

The massive floating platforms worked the Trinity and its larger tributaries, chewing through valley bottoms down to bedrock. The operation literally turned rivers upside down, and while much of the sediment washed downstream, some of the finer material lay trapped underneath gravel and larger cobbles.

In 1955 mining was supplanted with another catastrophe when Congress concluded that excess water in the Trinity River that was “wasting to the Pacific Ocean” could be diverted to the Central Valley “without detrimental effect to the fishery resources.” By 1963 two dams had been built and the Trinity River Diversion began transferring water to the Sacramento River watershed.

The dams blocked over 100 miles of habitat for salmon and steelhead, and in the early years, 90% of the water impounded by the dams was diverted to the Central Valley Project. What little water was sent downstream was artificially managed. Flows flatlined, and the river no longer ebbed and flowed with the seasons and storms.

Chinook and coho salmon and steelhead plummeted. As the consequences of the diversions, compounded by mining and logging, became clear, the Department of Interior began amending its management strategy, and in 2000, the agency called for the restoration of Trinity River anadromous fish populations. The Trinity River Restoration Program was set up to carry out the directive by actively restoring the 40 miles below Lewiston dam and managing the timing and volume of water released from upstream.

Letting the River Decide

The Yurok Tribe has been implementing those restoration projects for years; in 2020, the Yurok Tribe Construction Company officially formed as a separate entity. The company occupies a specialized niche, with operators like McCovey who have years of experience operating heavy equipment specifically for restoration work.

Man stand on an excavator on sand next to river — Heavy equipment operator and Yurok Tribal member Aldaron McCovey has been involved in restoration work since 2009. Photo: Juliet Grable

To help fund the $12.5 million project, the Yurok Tribe captured a $4 million grant from the state of California. The Tribe also led the design, though, like all of the program’s projects, all of the partners were involved.

The most engineered aspect of the project is a constructed landslide, called the “plug,” designed to prevent the river from routing back into the straight channel.

“The bulk of cost was material moving,” says Chris Laskodi, fish ecologist for the program. “It’s one of our simplest designs because we’re basically telling the river to do what it wants to do.”

A newly created floodplain is designed to sit just above the river level.

“That’s the exciting part,” says Wes Scribner, executive director of the Yurok Tribe Construction Company. “Any time you have increased flows, it will basically turn into a lake.”

The inundated valley will host an abundance of aquatic insects — a banquet for young Chinook salmon to feast on before heading out to the ocean. An area like this will also be warmer in spring, an ideal nursery when the mainstem of the river is still frigid from snowmelt.

Eventually the river will find its own route, depositing trees, brush and rock along the way.

The partners have seen a four-fold increase in juvenile salmon on the 40-mile “restoration reach” since 2005, but this hasn’t translated into an increase in adults returning to spawn just yet. Poor ocean conditions, prolonged drought and perennial water-quality issues on the Klamath River have taken a grim toll. Last spring, in anticipation of woeful returns of adult salmon to California’s rivers, the state canceled commercial and recreational Chinook salmon fishing for the year.

There is hope: By the end of 2024, four dams on the Klamath River will be completely removed. This monumental act of restoration should help improve water quality and hopefully reduce fish diseases, eventually translating into more fish on both the mainstem and tributaries like the Trinity. In the meantime, project partners on the Trinity are using adaptive management to improve their projects, such as making sure floodplains are low enough to be regularly inundated.

They’re making other tweaks, too, like ensuring that the floodplain banquet is available when young fish need it most. Today the Trinity River is allotted about half of the water that’s captured by the dams, and springtime flows are managed to mimic surges from storms and snowmelt.

In 2023, for the first time, the partners increased flows earlier, from February to April. Though it’s hard to draw solid conclusions from a single year, the partners observed that the inundated floodplains grew more fish food and increased the physical space where young fish can be. Fish also grew measurably larger.

This timing is critical.

“We need to start using the water [we have allotted to us] earlier in the year,” says Mike Dixon, executive director of the Trinity River Restoration Program. “In any given year, 60 to 80% of Chinook have left the reach once we start putting water onto floodplain habitat we’ve created.”

The Hoopa Tribe has opposed the winter flows out of concern that the practice won’t leave enough water to keep the river from becoming lethally warm in summer. The Trinity Management Council voted against implementing variable flows this coming winter. However, new biological opinions for both the Central Valley Project and for the operation of the Trinity River dams are being developed, which could impact both the timing and volume of water the restoration partners have to work with.

“The trend has been to send more and more water down the Trinity River,” says Laskodi. “This will hopefully be the next step towards a better fishery.”

Green and Fuzzy

For half a century, the flows in the Trinity River were essentially flatlined. This meant that narrow-leaf willows, which grow closest to the riverbank, were not subjected to regular scouring. The willows grew in thickly, outcompeting other plants and creating narrow berms that prevented the river from spreading out into its floodplain.

Person holds seeds in hand over bucket — Native seed mixes are carefully prepared so that a crew from the Hoopa Valley Tribe can revegetate the site. Photo: Juliet Grable

During construction, a crew from the Hoopa Valley Tribe began planting clusters of willow stakes and cottonwood trees, which readily take root, in the bare banks. They are using several different native species, since each thrives at slightly different elevations above the river.

On October 15 when the dumping, spreading and scraping of material ceased, the crew began the quiet work of seeding and planting the raw banks and floodplain. The Tribe has been vegetating the program’s restoration projects since 2015. Under the direction of riparian ecologist Veronica Yates, they are working with 45 native species, planting shrubs and trees and using seed mixes tailored for each location. The vegetation will help support a variety of birds and wildlife while reducing erosion.

Over much of the site, they’re planting in a layer of fine material mixed with fragrant wood chips — a “luxury” compared to the substrate they usually work with, says Yates. The fine material was recovered from the tailing piles; the chips from fire-killed trees processed by the California Department of Transportation.

“Next spring we’ll come back and it will be all green and fuzzy,” says Scribner. “That’s the neat thing about our projects; over time, it’s getting harder and harder to tell what it used to look like.”

Previously in The Revelator:

A Lifeline for Winter-Run Chinook

We’re Taking a Break

…but we’ll be back soon, rested and ready to take on the biggest environmental and conservation challenges of the day.

“Keep close to Nature’s heart…and break clear away, once in a while, and climb a mountain or spend a week in the woods. Wash your spirit clean.” —John Muir

I don’t remember where I first came across that quote, but I’ve been thinking about it a lot lately ever since I re-encountered it a few weeks ago — scribbled in a reporter’s notebook, buried beneath strata of ancient papers on my desk.

Those papers have now been cleaned up, and it’s time to wash my spirit clean too. Next week The Revelator goes on a short break. We’ll start publishing again in mid-December.

We’ve spent the past few months quietly planning this sabbatical, with the understanding that 2024 will be an eventful year for democracy and the planet. But you don’t need me to tell you this; just look at what we’ve already experienced in 2023. Expect more of that, with a force multiplier (or three) thrown in for good measure.

We’re going to have to work all the harder to find effective solutions, have critical conversations, promote the wonder of life on Earth, and support each other.

Look for us again in December. We already have a lot of great stories and commentaries in the works, so make sure you don’t miss any of them: Sign up for our newsletter, which will let you know the latest headlines as soon as we start publishing again.

You can also follow us on social media (Facebook and Twitter/X, with potentially more platforms to come), where we’ll keep promoting our archival stories over the next few months.

And if you can take your own opportunities to journey into the woods or mountains, well, maybe we’ll all be a bit stronger for it.

“The environment we create will determine what prevails. In other words, what we nurture and encourage wins.” —Jane Goodall

What Can We Learn From Jaguar Poop? A Lot

Molecular and isotope analysis of scat can help researchers study elusive wild cats without disturbing, capturing or handling them.

Poop is fertile ground for research.

Scientists have found that analyzing the DNA of a predator’s scat, for example, can reveal the kind of prey they’re eating. And that’s not all. “Fecal samples are commonly used for disease and hormone studies, which reveal information on animal health, reproductive status, stress levels, and other physiological processes,” says Claudia Wultsch, a wildlife biologist at the American Museum of Natural History.

Wultsch has used these methods for years to better understand jaguars (Panthera onca) in Belize, which is an important stronghold for the wild cats in Central America. But a recent collaboration with Brooke Crowley, a professor of geosciences at the University of Cincinnati who specializes in stable isotope biogeochemistry, has provided even more insight.

What they learned was important — but even more important was how they did it.

Hands-Off Methods

Jaguars have suffered from a depletion of prey, habitat loss and fragmentation, and conflict with people. The cats are now listed as near threatened by the IUCN and have disappeared from parts of their historic range, which stretched from South America to the United States, where they have been largely extirpated.

Belize may play a key role in restoring those populations. “Belize is part of the Mesoamerican Corridor Initiative, which aims to conserve jaguars and maintain connectivity between different jaguar populations,” says Wultsch.

But studying the elusive animals there isn’t exactly easy. Some scientists have turned to radio or GPS collars to track jaguar movement, but capturing and tranquilizing wild animals to attach a collar can stress them severely.

Jaguar face up close and cut off on the lower part. — A jaguar caught on a camera trap in Belize. Photo: jmeerman, (CC BY-NC 4.0)

Wultsch’s work there, which began more than a decade ago, took a different tack. With the aid of a conservation detector dog, she gathered fecal samples across several protected areas to learn more about the genetic diversity and connectivity of the country’s jaguars.

“Our research methods provide insights into their space use, and also provide information on how much and if they use anthropogenic resources in some areas,” she says.

A few years ago she teamed up with Crowley to include isotope analysis. Examining the values of carbon, nitrogen and strontium in scat samples, they hoped, could help reveal where an animal’s prey spent their time and therefore where the predators had foraged. That information could guide conservation initiatives.

In a recent study, published in July in the European Journal of Wildlife Research, they collected 80 jaguar scats, most of which belonged to four males, to help determine where the animals ranged. Unlike radio or GPS collars, all of their methods were noninvasive.

“We used fecal samples combined with genetic and isotope analysis to learn more about the spatial ecology of several free-ranging jaguars without ever disturbing, capturing or handling the animals,” explains Wultsch. “Spatial ecology studies based on noninvasive data such as fecal samples are rare, and we hope that our study will encourage more researchers to apply these techniques together.”

The research focused on the Mountain Pine Ridge Reserve in the Maya Mountains. “I wanted to see if the jaguars regularly utilized adjacent protected areas in Central Belize, and I also wanted to determine if they regularly hunt in agricultural areas to the west of the reserve,” says Crowley.

Analyzing the DNA of poop, also known as molecular scatology, doesn’t provide as much spatial detail as GPS collars, but it does provide genetic and health information. Adding isotopic analysis is also a key complement.

“It can extend the spatial information provided by the location and genetic composition of a specific scat by clarifying where the individual that produced the scat consumed its meal — for example, [whether it was] within or beyond the bounds of a particular geographic area with a specific set of habitats or geologies,” she says.

Looking at carbon, nitrogen and strontium values can help researchers know what an animal’s diet consists of and even the environment where it’s foraging. The methods help the researchers “learn more about the complex feeding ecology of elusive wildlife species such as the jaguar,” says Wultsch.

Far-Ranging Findings

Their findings revealed the four male jaguars had some overlapping ranges, varying in size from about 50 to 60 miles — about three times larger than estimates from home ranges of other males in a neighboring wildlife sanctuary. But they also used areas distinct from each other. None appeared to have spent time in the western or southwestern parts of the reserve, which are areas disturbed by wildfire and military activities.

“This could mean that the effective size of Mountain Pine Ridge may be smaller than its demarcated boundaries,” says Crowley. “Data like these should help inform decisions about how to manage protected areas. I am hopeful that [it] will be useful for park managers in Belize and elsewhere in Central and South America.”

She also hopes the research contributes to broader conservation goals and efforts to better understand how people have affected rare and elusive animals like jaguars.

“Humans have done an excellent job of colonizing and modifying even the remotest regions of our planet,” says Crowley. “I think it’s our responsibility to determine if animals are able to cope with these modifications or if they’re in trouble. If they are in trouble, we need to act quickly to ensure they have a future.”

Previously in The Revelator:

7 Exciting Ways Researchers Study Elusive and Endangered Wildlife

Species Spotlight: The Chinese Three-Striped Box Turtle

Illegal wildlife trade has made these beautiful animals one of the most endangered turtle species in the world.

Species name:

Chinese three-striped box turtle (Cuora trifasciata)

Description:

Chinese three-striped box turtles are quite colorful, of relatively small size (about three-quarters the size of a football), with a yellow head and three dark stripes running the length of the shell.

Their habitats include freshwater ecosystems and surrounding tropical and subtropical forests, and they’re omnivorous, eating a variety of invertebrates, small frogs and fish, with some fruits and mushrooms.

Females usually lay 1-3 eggs per clutch and can lay 1-2 times per year.

A colorful turtle pokes its head out of the water — Photo courtesy San Diego Zoo.

Where it’s found:

Smaller creeks and river tributaries throughout more densely forested habitat on the island of Hainan, as well as Hong Kong. It is extirpated from the mainland provinces of Guangdong, Guangxi and Fujian.

IUCN Red List status:

Critically endangered. It is one of the most endangered turtle species in the world, according to a 2003 assessment by the IUCN, and remains listed among the Turtle Conservation Coalition’s 25 most endangered tortoises and freshwater turtles.

Major threats:

Unsustainable harvest for use in traditional folk medicines, including a Chinese medicinal dessert, has pushed this species toward extinction. The pet trade and habitat destruction are the other primary threats to the species, often a target of illicit wildlife trade.

My favorite experience:

I’m passionate about helping to combat the illegal trade in wildlife. This led to San Diego Zoo’s involvement in helping rescue confiscated wildlife, and in particular turtles. The group of turtles from the genus Cuora, which includes this turtle, are some of the most highly sought after and most frequently smuggled turtles. It has been very rewarding to be able to work with our partner agencies to help combat wildlife trafficking, in part by collaborating when confiscations occur and animals are rescued from the trade. We can place the turtles here at the San Diego Zoo or send our experienced staff to the field to help provide triage care and rehabilitate the animals.

We also conduct education and outreach to help reduce the demand for these species. We partner with the Wildlife Trafficking Alliance, are an active member of the Southern California Confiscations Network, and support other turtle conservation organizations such as the AZA-accredited Turtle Survival Alliance.

One day, if demand goes down, I hope not to have the need to help as much. Until then some of my most meaningful time caring for wildlife comes from helping animals who have been part of confiscations.

What else do we need to understand or do to protect this species?

We need more fieldwork and monitoring of remaining populations in the wild in China, along with more regional protections of habitats and long-term critical protected areas with stronger enforcement. We also need to implement best care practices for confiscated turtles and repatriation methods — plans to safely return them to the wild when possible.

Lastly, better understanding the turtle’s genetic diversity is critical for us to help zoo populations form assurance colonies. These can act as source populations for wild reintroductions — if their habitats are preserved.

Previously in The Revelator:

A Virus Wiped Out 90% of This Turtle Species. Can It Recover?

A Promise to a Utah Prairie Dog

On the 50th anniversary of the Endangered Species Act, looking back to look forward.

Excerpted with permission from the introduction to A Wild Promise: An Illustrated Celebration of The Endangered Species Act by Allen Crawford, published by Tin House.

As a child, I watched the men I loved in my family lift their high-powered rifles and shoot one prairie dog after another and another for fun, and then walk away. They called them “pop-guts.” On the way back to our camp, I stepped over their small blood-soaked, blown-apart bodies left in the matted grasses of their prairie dog town. And then, a single prairie dog raised her head out of a burrow and stood up and faced me. I froze in place, unable to avoid her gaze. She disappeared underground.

On that day, I made a vow, short of standing in front of my father’s rifle, that I would be their ally. I have tried to keep that vow.

I graduated from high school in 1973, the same year the Endangered Species Act was signed into law. At that time only 3,300 Utah prairie dogs remained in 37 isolated colonies. Due to political pressure from ranchers and developers, they were not listed on the original endangered species list. Prairie dogs were seen as vermin.

In 1977, I lobbied the Utah legislature as a graduate student in education from the University of Utah. I had created a Utah Prairie Dog curriculum for the Salt Lake City school district. At the State Capitol, I was met with incredulity and disdain by representatives who insisted on calling prairie dogs “varmints,” the Speaker of the House handed me a recipe for “Prairie Dog Stew.”

Finally in 1984, the Utah prairie dog was added to the U.S. Fish and Wildlife’s Endangered Species List and remains on the IUCN Red List of Threatened Species.

But in 2000, in a special millennial issue of The New York Times Magazine, the Utah prairie dog was featured as one of 10 species most likely to become extinct by the next millennium. Their fate was to become a ghost species. I wrote a book on prairie dogs. Every month I sent a picture of prairie dogs in different poses (one with a helmet and bazooka) to friends at The Utah Nature Conservancy, a playful nudge for protection. Did any of these gestures make a difference? It made a difference to me. This was my wild promise that became a vow I made to the lone Utah prairie dog who survived my family’s massacre.

What is the difference between a promise and a vow? A promise is “a specific declaration or assurance that one will do a particular thing or that a particular thing will happen.” A vow is “a solemn promise” — a deepening gesture that one makes with one’s whole being. Both are nouns. But what if we see them as verbs, as actions that grows out of a commitment?

A promise becomes giving one’s word — “assuring someone that one will definitely do, give, or arrange something; undertake or declare that something will happen.” A vow is an open-ended commitment over time that moves into the realm of a sacred obligation — “dedicated to someone or something, especially a deity.” If one believes, as I do that the Divine resides in all living things, then there are many gods among us, in a myriad of shapes and sizes and forms.

What Wild Promise Will We Make?

Artist Allen Crawford has created A Wild Promise, an illustrated celebration of the Endangered Species Act, vibrant and instructive by featuring 80 vulnerable species. He is a visionary artist who not only cares about the survival and sustaining grace of the “more than human world” but has chosen to put his gifts to use with the intention of inspiring us to care more deeply and act more consciously on behalf of these vulnerable creatures.

Perhaps as you come to know their stories, and others like them, you will be moved to seek out an endangered or threatened species that lives close to you, learn their natural history and give them not only your attention, but your devotion. Or maybe you know of a species in your state or a particular ecosystem that needs federal protection. You can support a specific species campaign addressed to the Fish and Wildlife Service to nominate newly threatened plants and animals to be concerned for protection under the endangered species list.

The Endangered Species Act is an act of love that asks for our engagement, each in our own way with the gifts that are ours in the places we call home. Learn their names. Speak their names. Remember their names. Act.