New data to help inform tamarisk eradication and bird conservation efforts
New mapping by the U.S. Geological Survey may help resource managers in the southwestern U.S. figure out how they can bolster populations of the endangered southwestern willow flycatcher while at the same time trying to control an unwanted invasive plant that provides habitat for the tiny songbird.
The new report from the USGS provides detailed habitat information on the entire range of of the flycatcher, which breeds in lush, dense vegetation along rivers and streams from May through September. In 2013, the U.S. Fish and Wildlife Service designated 1,975 stream kilometers as critical flycatcher habitat, located in six states and 38 counties.
“The satellite model provides us with new capabilities to locate and monitor potential flycatcher habitat within individual watersheds and across its entire range” said James Hatten, Research Biogeographer with the USGS and the report’s author. “The satellite model also revealed how the quantity of flycatcher habitat is affected annually by drought conditions, with habitat declining in California from 2013 to 2015, while increasing in New Mexico and Texas.” Continue reading “Endangered and invasive species meet in the desert Southwest”→
The Southern sea otter population is healthy at the core of its range along the California coast, but the aquatic mammals are still struggling to expand north and south, probably because of predation by sharks, scientists said as they released the results of the latest annual otter survey.
“The population index has exceeded 3,090 for the first time, and that’s encouraging,” said Lilian Carswell, Southern Sea Otter Recovery Coordinator for USFWS, referring to a threshold number for recovery. If the population stays above that number for three years in a row, the U.S. Fish and Wildlife Service could consider a delisting proposal.Sea otters were presumed to be extinct in California in the early 1900s, but a remnant population of 30 animals was discovered and protected in the 1930s near Bixby Bay, north of Big Sur. They were listed as a threatened species in 1977, deemed at risk from oil spills. Continue reading “California sea otter population growing steadily”→
A federal judge in Montana has once again ruled that the U.S. Fish and Wildlife Service violated the Endangered Species Act when it excluded Colorado from a critical habitat designation for threatened lynx. In the end, the rare cat may yet get some protected sanctuaries in the Colorado high county.
‘Reducing immediate impacts is essential to tackling the biodiversity crisis’
About 75 percent of the world’s threatened species are at risk because of human impacts to their environment and unsustainable harvesting, according to a new study in the journal Nature.
“Addressing these old foes of overharvesting and agricultural activities are key to turning around the biodiversity extinction crisis” said lead author Sean Maxwell of the University of Queensland, “This must be at the forefront of the conservation agenda.”
Scientists from the University of Queensland, the Wildlife Conservation Society and the International Union for Conservation of Nature studied 8,688 species on the IUCN Red List. They found that 72 percent of species are imperiled by unsustainable harvesting. The production of food, fodder, fiber and fuel crops; livestock farming; aquaculture; and the cultivation of trees imperils another 62 percent. By comparison, 19 percent are considered threatened by climate change. Continue reading “New report IDs biggest global threats to wildlife”→
Continued illegal gill net fishing cited in push for ban on Mexican seafood
In what could be a last-ditch effort to save imperiled vaquita in the Gulf of California, conservation advocates are urging the Obama administration to launch economic sanctions against Mexico to halt that country’s trade in totoaba. According to the Center for Biological Diversity, the sanctions would be justified because Mexico is violating the Convention on International Trade in Endangered Species (CITES) by not enforcing the ban on totoaba trade.
Conservation advocates question plan for expanded fracking in Alaska’s Cook Inlet
Environmental advocates are warning that a plan to expand offshore fracking in Alaska’s Cook Inlet threatens a local population of beluga whales, considered to be among the most endangered whales in the world.