Beyond biodiversity: A new way of looking at how species interconnect.

In a development that has important implications for conservation, scientists are increasingly focusing not just on what species are present in an ecosystem, but on the roles that certain key species play in shaping their environment.

In 1966, an ecologist at the University of Washington named Robert Paine removed all the ochre starfish from a short stretch of Pacific shoreline on Washington’s Olympic Peninsula. The absence of the predator had a dramatic effect on its ecosystem. In less than a year, a diverse tidal environment collapsed into a monoculture of mussels because the starfish was no longer around to eat them.

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Brian Bienkowski

How a surge in visitors is overwhelming America’s National Parks.

Zion National Park in southwestern Utah is the poster child for the crowding of America’s most hallowed natural places. With its soaring and magisterial red, dun, and white rock cliffs with grand names such as the Court of the Patriarchs and the Temple of Sinawava, Zion is at the top of the list of the nation’s most dramatic scenery.

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Yellowstone grizzly bear to lose endangered species protection.

HELENA, Mont. — After 42 years on the endangered species list, the Yellowstone grizzly bear — whose numbers have grown to more than 700 from fewer than 150 — will lose its protected status, the Interior Department announced on Thursday.

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Why the world’s rivers are losing sediment and why it matters.

Vegetation is returning to this Elwha River valley in Washington state after two dams were removed.  OLYMPIC NATIONAL PARK/FLICKR

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Fred Moore/flickr

With Trump, a full-scale assault on protections for US public lands.

The battle over President Donald Trump’s efforts to roll back heightened protection for large swaths of federal lands is now focused on the Bears Ears National Monument, a 1.35-million-acre tract on the red rock landscape of southeastern Utah. Carved out of territory owned by the federal government and created largely at the behest of Native American tribes because of tens of thousands of sacred sites there, Bears Ears is the main reason Trump signed an executive order requiring the Interior Department to review 27 national monuments to see if there is a way to fully or partially undo them.

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The new threat to wolves in and around Yellowstone.

YELLOWSTONE NATIONAL PARK, Wyo. — The vast, sagebrush-studded valleys in this huge chunk of wild country, teeming with herds of elk and bison, are home these days to 10 packs of wolves.

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The fear factor: How the peril of predators can transform a landscape.

On a beach in the Gulf Islands off the coast of southern British Columbia, biologist Liana Zanette lashed speakers to a tree for a special broadcast. It wasn’t music, and it wasn’t played for people. It was the sharp sound of barking dogs — aimed at a population of bold raccoons.

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A splash of river water now reveals the DNA of all its creatures.

Quick and inexpensive DNA sampling of a river, stream, or lake can now divulge what fish or other animals live there. This rapidly growing environmental DNA, or eDNA, technology is proving to be a game-changing conservation tool.

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From our Newsroom

The pollution plumes of North Pole

An oil refining chemical has infiltrated the water of a small Alaskan town, but families—many worried about health issues—are left with more questions than answers.

Systemic racism continues to plague pandemic response: Derrick Z. Jackson

Remembering those have fallen to the collective selfishness of the prior White House and the nation's governors—a selfishness significantly stained by systemic racism.

Earth Day: Amidst the greenwashing, it's still a good thing

When corporations tout their greenness and journalists get beaten senseless by lame ideas.

‘Forever chemicals’ coat the outer layers of biodegradable straws

More evidence that harmful PFAS chemicals are sneaking into some "green" and "compostable" products.

Fractured: The body burden of living near fracking

EHN.org scientific investigation finds western Pennsylvania families near fracking are exposed to harmful chemicals, and regulations fail to protect communities' mental, physical, and social health.

Pesticide DDT linked to increased breast cancer risk generations after exposure

Groundbreaking study finds women whose grandmothers had high DDT exposure are more likely to be obese and have early menstruation—both breast cancer risk factors.

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