Posted on October 19, 2014 by Bob Berwyn
Yet another study describes cascading ecological impacts of declining predator populations.
Plant communities change as herbivoves spread
FRISCO — The global decline of large predators is leading to a loss of plant and tree diversity, scientists said after studying ecosystem changes in Africa. Recent research shows more than 75 percent of the world’s large carnivore species are in decline, with 17 of those species occupying less than half of their historical distributions.
The research by University of British Columbia zoologist Adam Ford and his colleagues involved tracking Africal impalas with GPS units to see how they respond to the presence (and absence) of predators, specifically whether the predators scare impala so much that impala will avoid areas where they are likely to be killed. They combined the tracking data with a high-resolution satellite image of tree cover and located carcasses to determine where impala are being killed. Continue reading
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Posted on October 18, 2014 by Bob Berwyn
Cardinals have become more common in the Northeast.
‘Climate change should not be viewed as the sole driver of changes in winter bird communities, but this signal is a pretty strong one for climate change’
FRISCO — Global warming is reshaping backyard bird communities in eastern North America, as once-rare birds are now common in the Northeast.
Cardinals, chipping sparrows and other warm-adapted species have greatly expanded their wintering range in a warmer world, a change that may have untold consequences for North American ecosystems, according to University of Wisconsin-Madison wildlife biologists Benjamin Zuckerberg and Karine Princé.
In a new paper published in Global Change Biology, Zuckerberg and Princé analyzed more than two decades of data on 38 species of birds gathered by thousands of citizen scientists through the Cornell University Laboratory of Ornithology’s Project FeederWatch. They found that birds typically found in more southerly regions are gradually pushing north, restructuring the communities of birds that spend their winters in northern latitudes. Continue reading
Filed under: biodiversity, climate and weather, Environment, global warming | Tagged: biodiversity, birdwatching, climate change, global warming, Project FeederWatch, wildlifeeder | 2 Comments »
Posted on October 13, 2014 by Bob Berwyn
Wolverine habitat in the western U.S.
Groups say federal agency erred by denying Endangered Species Act protection
FRISCO — Wildlife advocates are once again heading to federal court to seek Endangered Species Act protection for rare wolverines, a species deemed as vulnerable to global warming because of its dependence on deep spring snow cover for denning and breeding.
Wolverines live in small numbers mainly in the northern Rocky Mountains. The wide-ranging mammals were hunted, trapped and poisoned to near-extinction during the settlement era, and now face a climate whammy that could melt the big snowbanks they need for reproduction.
The U.S. Fish and Wildlife Service proposed an endangered species listing in 2013 in a rule supported by the agency’s own scientific reports and by independent review panels, but then reversed course in May 2014, asserting that climate models are not accurate enough to pinpoint threats to wolverine habitat. Continue reading
Filed under: biodiversity, endangered species, Environment | Tagged: Conservation biology, endangered species, global warming, U.S. Fish and Wildlife Service, wolverines | 1 Comment »
Posted on October 12, 2014 by Bob Berwyn
Barrier islands, shorelines, dunes, underwater grasses and oyster beds targeted for restoration
A NASA satellite image shows the oil slick from the Deepwater Horizon disaster spreading across the northern Gulf of Mexico in late May, 2010.
FRISCO — Nearly four years after BP’s Deepwater Horizon drilling operation disastrously failed and spewed millions of gallons of oil into the Gulf of Mexico, NOAA and its partners have finalized a $627 million restoration plan. The formal record of decision released last week authorizes 44 projects to restore barrier islands, shorelines, dunes, underwater grasses and oyster beds.
This announcement marks the largest suite of Gulf early restoration projects selected thus far in the wake of the 2010 oil spill. The projects aim to address a range of injuries to natural resources and the subsequent loss of recreational use. Details of restoration efforts are outlined in the Final Programmatic and Phase III Early Restoration Plan and Early Restoration Programmatic Environmental Impact Statement. Continue reading
Filed under: biodiversity, BP Gulf oil spill, energy, Environment, gas drilling, oil drilling | Tagged: Deepwater Horizon, Environment, Gulf of Mexico, Gulf of Mexico restoration, oil pollution, oil spills | 1 Comment »
Posted on October 12, 2014 by Bob Berwyn
Study projects major shifts in species richness patterns
A map from the new University of British Columbia study shows the current distribution of species richness based on data going back to the 1950s.
FRISCO — Many fish species are racing away from the equator and toward the poles to escape steadily warming ocean temperatures. In a worst-case scenario of unchecked greenhouse gas emissions, many fish will disappear from the tropics by 2050, moving poleward by as much as 26 kilometers per decade.
Under the best-case scenario, where the Earth warms by just 1 degree Celsius, fish would move 15 kilometres every decade, according to a new study by scientists with the University of British Columbia study that examined the impact of climate change on fish stocks. Continue reading
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Posted on October 11, 2014 by Bob Berwyn
Can sea otters bounce back from the brink?
Population along California coast hovering near targeted recovery level
FRISCO — Sea otters are making a slow and steady comeback along the Central California coast, with the species’ population nearing a level that could earn them the distinction of being taken off the endangered species list.
In the latest official population estimate released last week, federal scientists said there were just under 3,000 southern sea otters living along the Central California coast, based on a population index used since the 1980s. That’s up slightly from 2013 and just shy of the 3,090 threshold set by the U.S. Fish and Wildlife Service as a recovery benchmark. Continue reading
Filed under: biodiversity, endangered species, Environment | Tagged: endangered species, marine mammals, sea otters, wildlife conservation | Leave a comment »