Posted on July 11, 2015 by Bob Berwyn
No evidence that culling sharks cuts risks
There are more great white sharks and more people in the ocean along the California coast, but the risk of shark attacks has decreased since the 1960s. Photo courtesy NOAA.
Researchers say shark attacks are more likely in the evening than during the day. @bbberwyn photo.
FRISCO — Even as many more people take to the water along the California Coast, the risk of being attacked by great white sharks has dropped considerably since the 1950s, according to Stanford University researchers who took a close look at shark attack statistics.
Their findings show that empowering people with information about how to avoid sharks is far more effective for public safety than trying to cull sharks. The scientists released their study results after a recent wave of shark attacks in North Carolina made headlines.
“You have a higher chance to win the lottery, a much higher chance to drown in the ocean, than to be attacked by a shark,” said Stanford researcher Francesco Ferretti. “At the same time, people need to approach the ocean with precaution and respect. We are entering the realm of predators and they are fulfilling their ecological role,” Ferretti said. Continue reading
Filed under: endangered species, Marine biology, ocean conservation | Tagged: California, great white sharks, oceans, Scuba diving, shark attacks, shark culling, surfing | 1 Comment »
Posted on June 15, 2015 by Bob Berwyn
A lawsuit in federal court could delay new oil and gas development in California. Photo via BLM.
Lawsuit say agency’s plan violates federal environmental laws
FRISCO — A federal plan to open more public lands in California to energy development will be tested in court, with Earthjustice filing a lawsuit to block fracking across California’s Central and San Joaquin valleys; the southern Sierra Nevada; and in Santa Barbara; San Luis Obispo and Ventura counties along California’s central coast.
At issue is a Bureau of Land Management resource plan for the region that has already been called into question in 2013, when a federal judge ruled that the BLM violated the law when it issued oil leases in Monterey County without considering the environmental risks of fracking. Continue reading
Filed under: energy, Environment, fracking, gas drilling | Tagged: BLM, California, Earthjustice, Environment, fracking, public lands | 1 Comment »
Posted on March 13, 2015 by Bob Berwyn
Just 50 miles northwest of San Francisco, Cordell Bank teems with life above and below the surface. This thriving ‘underwater island’ is the centerpiece of Cordell Bank National Marine Sanctuary, which NOAA has now expanded to protect additional areas like Bodega Canyon along the continental shelf. Photo courtesy NOAA.
Cordell Bank, Gulf of the Farallones home to 25 threatened and endangered species
FRISCO — A pair of marine sanctuaries off the coast of northern California are doubling in size, offering more protection for globally significant and productive marine ecosystems. The sanctuaries encompass estuarine wetlands, rocky intertidal habitat, open ocean, and shallow marine banks.
Cordell Bank National Marine Sanctuary, located 42 miles north of San Francisco, will expand from 529 square miles to 1,286 square miles. Gulf of the Farallones National Marine Sanctuary will expand from 1,282 square miles to 3,295 square miles of ocean and coastal waters. Continue reading
Filed under: biodiversity, Environment, Marine biology, national parks, ocean conservation | Tagged: California, Cordell Bank National Marine Sanctuary, Environment, Gulf of the Farallones National Marine Sanctuary, marine protected areas, ocean biodiversity, oceans | Leave a comment »
Posted on March 3, 2015 by Bob Berwyn
Snowpack at record low levels
A NASA Earth Observatory photo shows dry conditions in California in Jan. 2014.
FRISCO — The snowpack in some key California watersheds is at or near all-time record low, the state’s water managers reported this week after conducting their monthly surveys.
At one site, west of Sacramento in the Sierra Nevada Mountains, the California Department of Water Resources reported less than 1 inch of water content in the snowpack, just 5 percent of the March 3 historical average for that site. Snowpack measurements are online here. Continue reading
Filed under: climate and weather, Drought | Tagged: California, California snowpack, climate, climate change, drought, global warming | 1 Comment »
Posted on February 2, 2015 by Bob Berwyn
‘It looks like we’re going to lose pikas from many areas where people have been used to seeing them …’
A Quandary Peak pika enjoys sunny weather on a rocky ledge. bberwyn photo.
FRISCO — Global warming is probably shrinking habitat for California’s pikas, scientists said this week in a new study that looked at 67 locations with historical data on populations of the small alpine mammals. Pikas have already vanished completely from 10 of those sites, the researchers said, explaining that local extinctions are likely where summer temperatures are high and habitat is already marginal.
“This same pattern of extinctions at sites with high summer temperatures has also been observed in the Great Basin region,” said Joseph Stewart, a graduate student at UC Santa Cruz and first author of a paper reporting the new findings, published January 29 in the Journal of Biogeography. Continue reading
Filed under: biodiversity, climate and weather, climate change, endangered species, Environment, global warming, wildlife | Tagged: California, climate change, endangered species, Environment, global warming, pikas, wildlife | Leave a comment »
Posted on January 23, 2015 by Bob Berwyn
Oaks, stands of dense, small trees becoming dominant
FRISCO — Hand-written notes from old forest surveys have helped scientists track long-term changes in California forests, including a decline of large trees of up to 50 percent in the Sierra Nevada highlands, the south and central coast ranges and Northern California.
The research team from the University of California, Berkeley, UC Davis and the U.S. Geological Survey compared unique forest surveys collected by UC Berkeley alumnus Albert Wieslander in the 1920s and ’30s with recent U.S. Forest Service data to show that the decline of large trees and increase in the density of smaller trees is not unique to the state’s mountains. Continue reading
Filed under: climate and weather, Environment, Forest health, forests, global warming | Tagged: California, climate change, Environment, forests, Old-growth forest | 2 Comments »