Low-lying tropical atoll islands appear remarkably vulnerable to climate change. But when shrouded with native forests and with abundant seabird populations, these islands may keep up with rising sea levels, a new study finds. Seabirds act as biological pumps, moving nutrients from feeding areas in the open ocean to roosting and nesting areas on land and, eventually, back into the ocean. The recent Science Advances study traces how energy from nutrient-dense seabird guano trickles through terrestrial and marine ecosystems on atoll islands. The findings show that these nutrients, along with native vegetation, boost processes that build and maintain the island’s reef and underlying structure, even in the face of rising seas. Rewilding atoll islands — many of which no longer support seabirds and have seen native forests replaced by coconut palms — builds climate resilience, as well as benefiting biodiversity, Nicholas Graham, distinguished professor at Lancaster University, England, and the study’s first author, told Mongabay in a video call. “It’s really telling us something about the islands themselves,” Graham said. “Seabirds and native vegetation actually support the resilience of the islands themselves to sea level rise, which I think is fascinating and really quite positive.” Atoll islands of Tetiaroa Atoll, French Polynesia. Seabirds and native vegetation make low-lying atoll islands more resilient to sea level rise due to climate change, according to a recent study. Image by Yadvinder Malhi. Graham and colleagues first began looking into the connection between seabirds, islands and reefs nearly a decade ago. At the time,…This article was originally published on Mongabay

When an ice shelf blocks a polar fjord, it sparks the creation of an ecosystem like no other: the epishelf lake. Meltwater pools up behind the ice shelf, floating above the denser seawater, with both freshwater and marine species found in distinct layers within the same water column. But Canada’s last known epishelf lake, at Milne Fjord on Ellesmere Island in Nunavut, is gone. The lake drained out to sea after the Milne Ice Shelf calved in 2020, and it won’t return, according to a recent study published in Scientific Reports. Ellesmere Island lies within the Last Ice Area, a region of the Arctic that scientists have long thought would retain its sea ice longer than elsewhere as the planet warms. The changes at Milne Fjord are a signal of accelerating climate change, with implications for the entire planet. “What happens in the Arctic doesn’t stay in the Arctic,” study co-author Derek Mueller, a professor at Carleton University in Ontario, told Mongabay in a video call. Meltwater lakes form in the depressions of Milne Ice Shelf every summer. Image by Jérémie Bonneau. In the past, ice shelves dammed Ellesmere’s many fjords, with an estimated 10 to 17 epishelf lakes perched along its north coast as recently as the 20th century. But over the past several decades, dramatic warming, driven by the burning of fossil fuels, has transformed this region. One by one, giant ice shelves have split and calved, allowing the epishelf lakes to drain away. When the massive 65-meter-deep…This article was originally published on Mongabay

The Elk Valley in southeast British Columbia is home to Canada’s four largest coal mines. With a proposed mine expansion moving through environmental assessment, people on both sides of the Canada-U.S. border worry the valley’s decades-old pollution problem could get even worse. Industrial coal mining in the Elk Valley goes back more than 50 years. The valley’s mines, currently owned by Elk Valley Resources (EVR), supply 77% of Canada’s metallurgical coal, a grade of coal used in steel making, according to a 2024 report produced for EVR. The vast majority of this coal was exported to Asia. EVR’s largest mine, Fording River Operations (FRO), is expected to run out of coal within a decade. The proposed Fording River Extension (FRX) would open 2,031 hectares (5,019 acres) on Castle Mountain, adjacent to the existing mine, and operate for about 35 years. The FRX is currently moving through a coordinated federal-provincial environmental impact assessment. Three proposed new coal mines, not linked to EVR, are also currently in the environmental assessment process. The Fording River Operations mine, in the Elk Valley, British Columbia. The mountain top removal mining process dramatically alters topography and drainage patterns, and creates large volumes of waste rock. Image by Siobhán Winters/Wildsight. Proponents maintain the FRX is necessary to sustain economic benefits post FRO-closure, such as gross domestic product contributions, payments to governments and jobs. Others question the wisdom of expanding mining whilst unabated pollution threatens ecosystems, wildlife and livelihoods across the region. The Ktunaxa Nation Council, representing Ktunaxa…This article was originally published on Mongabay

INVERMERE, Canada — Mark Thomas, Shuswap Band salmon chief, welcomes groups of students to a narrow stretch of the Columbia River, between the Rocky and Purcell mountains in western Canada. It’s late May, and snow still graces the distant peaks. For the past five months, students from schools nearby towns have raised sockeye salmon (Oncorhynchus nerka) in their classrooms. They have watched pea-sized eggs transform into tiny, newly hatched fish known as alevin, with an egg sac still attached to their silvery bodies, and then to free-swimming fry. This morning, they will slip the fry into the river, just downstream from its headwaters in the province of British Columbia. “When you go down to the river, tell the water your name, introduce yourself to the water spirits,” Thomas tells them. “Then you can pray for whatever you want. You can pray to be smarter, or taller. You can pray for your family — or the fish.” Thomas begins by smudging the group as part of a traditional ceremony, using an eagle’s wing to gently waft smoke from a bundle of juniper and sage that is smoldering in an abalone shell. The kids then make their way to the riverbank and, to the sounds of drumming and traditional song, each takes a plastic cup with a fish inside. When they are ready, they send it down a DIY funnel and watch the tiny fry swim away. The morning’s fry release, through the Fish-in-Schools program, and an afternoon ceremonial release for community…This article was originally published on Mongabay