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    How a Yurok family played a key role in the world’s largest dam removal project 

    The Water RemembersAmy Bowers CordalisLittle Brown & Co., $30In September 2002, an estimated 34,000 to 78,000 adult Chinook salmon died in the Klamath River within the Yurok Reservation in Northern California. The U.S. government had diverted river water to farms during a drought. The resulting low levels and warm temperature of the water, coupled with the flow of toxic blue-green algae that bloomed in the reservoirs behind the river’s four dams, created the perfect conditions for “ich,” a parasitic gill rot disease, to spread and suffocate the fish. It was one of the largest fish kills recorded in U.S. history.The ecological disaster catalyzed an Indigenous-led movement to remove the dams, the oldest of which had choked the river, blocking fish migrations and tainting water quality, for over 100 years. In The Water Remembers, Yurok tribal member, activist and attorney Amy Bowers Cordalis shares an intimate look into her family’s and nation’s decades-long fight to restore the health of the Klamath and preserve their way of life — a multigenerational effort that culminated in the largest dam removal and river restoration project in history.

    The Yurok people believe it is their duty to live in balance with nature. They steward the Klamath and its surrounding ecosystems. In return, the river gives them sustenance, physically and spiritually. This sacred reciprocity is reflected in Yurok stories, Cordalis writes, which “teach that if the Klamath salmon and the Klamath River die, so will the Yurok people.”

    Cordalis’ reverence for the river, the salmon and the craft of fishing drips from every page of this memoir. She describes the thrill that overcomes her and other members of the Yurok Nation when salmon return to the Klamath River from the Pacific Ocean to spawn. Bobbing in a boat, gill net in hand, surrounded by trees, water and wildlife, is a spiritual practice.

    In 2002, tens of thousands of salmon died in the Klamath River from a gill rot disease called “ich.” The river’s four dams helped create the perfect conditions for the illness to spread.Northcoast Environment Center

    Every page is also stained with stories of historical injustice. For nearly two centuries, colonization, genocide and their lingering scars have threatened the Yurok’s way of life, from the United States’ theft of Yurok land since the 19th century to California’s mid-20th century ban on Yurok fishing to boost non-Indigenous logging and fishing businesses.

    Through it all, Cordalis’ family has resisted. Cordalis’ great-grandmother, Geneva Mattz, and her sons fished and sold bootlegged salmon throughout the ban. In the late 1960s, her great-uncle Ray Mattz sued California for violating his Indigenous rights by repeatedly arresting him for fishing on his ancestral land — a case that he won in the U.S. Supreme Court in 1973. The 2002 fish kill reinvigorated this tradition of resistance. Cordalis, then a 22-year-old intern at the Yurok Tribal Fisheries Department, witnessed the devastation firsthand. Her gruesome descriptions of the limp and rotting carcasses of thousands of salmon crowded on the riverbank convey the visceral and emotional response of the Yurok to what Cordalis deems an “ecocide.” More

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    Coral collapse signals Earth’s first climate tipping point

    Earth has entered a grim new climate reality.

    The planet has officially passed its first climate tipping point. Relentlessly rising heat in the oceans has now pushed corals around the world past their limit, causing an unprecedented die-off of global reefs and threatening the livelihoods of nearly a billion people, scientists say in a new report published October 13.

    Even under the most optimistic future warming scenario — one in which global warming does not exceed 1.5 degrees Celsius above pre-industrial times — all warm-water coral reefs are virtually certain to pass a point of no return. That makes this “one of the most pressing ecological losses humanity confronts,” the researchers say in Global Tipping Points Report 2025. More

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    Antarctic krill eject more food when it’s contaminated with plastic

    Antarctic krill keep revealing new superpowers.

    Euphausia superba, the Southern Ocean’s ubiquitous krill species, sequester large amounts of carbon via their profuse poop. Now, scientists have identified another way in which the swimming crustaceans may modulate Earth’s climate: by sending their leftovers down to the bottom of the sea.

    Laboratory observations of krills’ filter feeding behavior suggest that when food is plentiful — such as during a phytoplankton bloom — ejected “boluses” of leftover food also sequester carbon, researchers report October 7 in Biology Letters. More

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    Recycled glass could help fend off coastal erosion

    In the 1960s, saltwater intrusion in a southeast Louisiana swamp killed the trees and plants that lived there. Now restored with freshwater, the swamp has become the perfect place for revegetation projects — particularly because healthy swamps can serve as a speed bump to slow hurricanes. 

    That’s one reason why the open water of Bayou Bienvenue, once home to cypress and tupelo trees, now hosts an island of native trees, grasses — and recycled glass. The artificial island is helping researchers understand a new approach to coastal restoration. More

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    Crystallized dino eggs provide a peek into the tumultuous Late Cretaceous

    Crystals hidden inside dinosaur eggs at a famous fossil site are giving scientists a chance to do something that’s long proven elusive: figure out how old the ancient nests really are.

    Finding these fossilized eggs’ true shelf life makes it possible to connect large-scale changes in climate to tiny shifts in the structure of eggshells, the researchers report September 11 in Frontiers in Earth Science. That, in turn, offers a new way to assess the ancient environments in which the dinosaurs nested. More

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    Just like humans, many animals get more aggressive in the heat

    Citations

    E.K. Francispillai, S.M. Dietsch and L.J. Chapman. Effects of temperature on fish aggression and the combined impact of temperature and turbidity on thermal tolerance. Journal of Thermal Biology. Vol. 125, October 2024, 103987. doi: 10.1016/j.jtherbio.2024.103987.

    H.M. Choi et al. Temperature, crime, and violence: a systematic review and meta-analysis. Environmental Health Perspectives. Vol. 132, October 2024, 106001. doi: 10.1289/EHP14300.

    S. Pappas. How heat affects the mind. Monitor on Psychology. Vol. 55, June 2024, p. 42.

    N.A.R. Jones, J. Newton-Youens and J.G. Frommen. Rise and fall: increasing temperatures have nonlinear effects on aggression in a tropical fish. Animal Behaviour. Vol. 207, January 2024, p. 1. doi: 10.1016/j.anbehav.2023.10.008. 

    T. Dey, A. Zanobetti and C. Linnman. The risk of being bitten by a dog is higher on hot, sunny, and smoggy days. Scientific Reports. Published online June 15, 2023. doi: 10.1038/s41598-023-35115-6.

    P. Krapf et al. Global change may make hostile – Higher ambient temperature and nitrogen availability increase ant aggression. Science of the Total Environment. Vol. 861, February 25, 2023, 160443. doi: 10.1016/j.scitotenv.2022.160443.

    A. Xu et al. Monkeys fight more in polluted air. Scientific Reports. Published online January 12, 2021. doi:10.1038/s41598-020-80002-z.

    K.E. Bissell and K.K. Cecala. Increased interspecific aggression between Appalachian stream salamanders at elevated temperatures. Freshwater Science. Vol. 38, December 2019, p. 834. doi: 10.1086/705995.

    G. Greenberg. The effects of ambient temperature and population density on aggression in two inbred strains of mice, mus musculus. Behaviour. Vol. 42, January 1972, p. 119. doi: 10.1163/156853972X00130.

    R.M Berry and C.E. Jack. The effect of temperature upon shock-elicited aggression in rats. Animal Learning and Behavior. Vol. 23, November 1971, p. 341. doi: 10.3758/BF03336141. More

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    River turbulence can push toxic pollutants into the air

    Toxic pollutants from a Southern California river are infiltrating the air.

    Polluted water surging along a turbulent section of the Tijuana River in San Diego can release toxic gases, including hydrogen sulfide, into the air, researchers report in the Aug. 28 Science. In a nearby neighborhood, hydrogen sulfide — produced from sewage breakdown and known for its rotten egg smell — peaked at levels thousands of times the typical urban amounts.

    “As far as we can tell, this is one of, if not the first time, that we’ve seen a full-on air pollution crisis caused by a river, especially one so close to the community,” says Benjamin Rico, an atmospheric chemist at the University of California, San Diego. More