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Category: Ecology

Wildlife preservation depends on saving animals, their habitats, and their cultures

Wildlife preservation depends on saving animals, their habitats, and their cultures

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Ed Yong writes: In the 1800s, there were so many bighorn sheep in Wyoming that when one trapper passed through Jackson Hole, he described “over a thousand sheep in the cliffs above our campsite.” No such sights exist today. The bighorns slowly fell to hunters’ rifles, and to diseases spread from domestic sheep. Most herds were wiped out, and by 1900, a species that once numbered in the millions stood instead in the low thousands. In the 1940s, the Wyoming…

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The human domination of the face of the Earth

The human domination of the face of the Earth

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By Rhett A. Butler Despite ongoing deforestation, fires, drought-induced die-offs, and insect outbreaks, the world’s tree cover actually increased by 2.24 million square kilometers — an area the size of Texas and Alaska combined — over the past 35 years, finds a paper published in the journal Nature. But the research also confirms large-scale loss of the planet’s most biodiverse ecosystems, especially tropical forests. The study, led by Xiao-Peng Song and Matthew Hansen of the University of Maryland, is based…

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California burning

California burning

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William Finnegan writes: On the northwestern edge of Los Angeles, where I grew up, the wildfires came in late summer. We lived in a new subdivision, and behind our house were the hills, golden and parched. We would hose down the wood-shingled roof as fire crews bivouacked in our street. Our neighborhood never burned, but others did. In the Bel Air fire of 1961, nearly five hundred homes burned, including those of Burt Lancaster and Zsa Zsa Gabor. We were…

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Support for the Endangered Species Act remains high as Trump administration and Congress try to gut it

Support for the Endangered Species Act remains high as Trump administration and Congress try to gut it

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The endangered Sierra Nevada bighorn sheep. USFWS By Jeremy T. Bruskotter, The Ohio State University; John A Vucetich, Michigan Technological University, and Ramiro Berardo, The Ohio State University The Endangered Species Act, or “the Act,” is arguably the most important law in the United States for conserving biodiversity and arresting the extinction of species. Congress passed the ESA in 1973 with strong bipartisan support (the House voted 355-4 in favor of the law) at the behest of a Republican president,…

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Orcas of the Pacific Northwest are starving and disappearing

Orcas of the Pacific Northwest are starving and disappearing

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The New York Times reports: For the last three years, not one calf has been born to the dwindling pods of black-and-white killer whales spouting geysers of mist off the coast in the Pacific Northwest. Normally four or five calves would be born each year among this fairly unique urban population of whales — pods named J, K and L. But most recently, the number of orcas here has dwindled to just 75, a 30-year-low in what seems to be…

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Where have all Britain’s insects gone?

Where have all Britain’s insects gone?

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Robin McKie reports: When Simon Leather was a student in the 1970s, he took a summer job as a postman and delivered mail to the villages of Kirk Hammerton and Green Hammerton in North Yorkshire. He recalls his early morning walks through its lanes, past the porches of houses on his round. At virtually every home, he saw the same picture: windows plastered with tiger moths that had been attracted by lights the previous night and were still clinging to…

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Climate change on track to cause major insect wipeout, scientists warn

Climate change on track to cause major insect wipeout, scientists warn

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The Guardian reports: Global warming is on track to cause a major wipeout of insects, compounding already severe losses, according to a new analysis. Insects are vital to most ecosystems and a widespread collapse would cause extremely far-reaching disruption to life on Earth, the scientists warn. Their research shows that, even with all the carbon cuts already pledged by nations so far, climate change would make almost half of insect habitat unsuitable by the end of the century, with pollinators…

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In the fate of the Delta smelt, warnings of conservation gone wrong

In the fate of the Delta smelt, warnings of conservation gone wrong

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Sharon Levy writes: Peter Moyle, an eminent authority on the ecology and conservation of California’s fishes, stands on the narrow deck of a survey boat and gazes out over the sloughs of Suisun Marsh. The tall, tubular stems of tule reeds bend in the wind as a flock of pelicans soars past, their white wings edged in black. It’s an idyllic scene that hints at an earlier time, back before the Gold Rush, when undisturbed creeks and tidal marsh covered…

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Worldwide catastrophe as shorebirds face extinction

Worldwide catastrophe as shorebirds face extinction

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  John W. Fitzpatrick and Nathan R. Senner write: A worldwide catastrophe is underway among an extraordinary group of birds — the marathon migrants we know as shorebirds. Numbers of some species are falling so quickly that many biologists fear an imminent planet-wide wave of extinctions. These declines represent the No. 1 conservation crisis facing birds in the world today. Climate change, coastal development, the destruction of wetlands and hunting are all culprits. And because these birds depend for their…

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EU agrees total ban on bee-harming pesticides

EU agrees total ban on bee-harming pesticides

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The Guardian reports: The European Union will ban the world’s most widely used insecticides from all fields due to the serious danger they pose to bees. The ban on neonicotinoids, approved by member nations on Friday, is expected to come into force by the end of 2018 and will mean they can only be used in closed greenhouses. Bees and other insects are vital for global food production as they pollinate three-quarters of all crops. The plummeting numbers of pollinators…

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The battle to ban plastic bags

The battle to ban plastic bags

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A plastic bag floats in the ocean in this 2016 photo. Creative Commons By Sylvain Charlebois, Dalhousie University and Tony Robert Walker, Dalhousie University There are increasing concerns about the use of plastics in our day-to-day lives. Single-use plastics of any kind, including grocery bags, cutlery, straws, polystyrene and coffee cups, are significant yet preventable sources of plastic land-based and marine pollution. In Canada, bans on plastics have so far been left up to municipalities, and some are taking action….

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Land degradation by human activities pushing Earth into sixth mass extinction and undermining well-being of 3.2 billion people

Land degradation by human activities pushing Earth into sixth mass extinction and undermining well-being of 3.2 billion people

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  Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES): Worsening land degradation caused by human activities is undermining the well-being of two fifths of humanity, driving species extinctions and intensifying climate change. It is also a major contributor to mass human migration and increased conflict, according to the world’s first comprehensive evidence-based assessment of land degradation and restoration. The dangers of land degradation, which cost the equivalent of about 10% of the world’s annual gross product in 2010 through…

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‘Shocking’ decline in birds across Europe due to pesticide use, say scientists

‘Shocking’ decline in birds across Europe due to pesticide use, say scientists

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The Independent reports: Bird numbers across France have declined by a third in the past 15 years, according to new figures released by researchers. Linked to changes in agricultural practices such as pesticide use, the dramatic collapse is comparable with trends observed in other parts of Europe, including the UK. Nevertheless, the latest figures have shocked scientists who previously thought France’s bird population was relatively stable. “We had some idea because when you are working in the countryside you find…

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The immobilization of life on Earth

The immobilization of life on Earth

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One of the defining characteristics of life is movement, be that in the form of locomotion or simply growth. What is inanimate is not alive and yet humans, through the use of technology, are constantly seeking ways to reduce the need to move our own limbs. We have set ourselves on a trajectory that, if taken to its logical conclusion, will eliminate our need to possess a fully functioning body as we reduce ourselves to a corpse-like condition sustained by…

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We’re killing our lakes and oceans

We’re killing our lakes and oceans

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Eelco Rohling and Joseph Ortiz write: On January 5, 2018, a paper published in the journal Science delivered a sobering message: The oxygenation of open oceans and coastal seas has been steadily declining during the past half century. The volume of ocean with no oxygen at all has quadrupled, and the volume where oxygen levels are falling dangerously low has increased even more. We’re seeing the same thing happen in major lakes. The main culprits are warming and — especially…

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