Posted on August 18, 2015 by Bob Berwyn
Will fish and water bugs be decimated by systemic pesticides?
FRISCO — Neonicotinoid pesticides are spreading throughout the environment with as-yet unknown effects on human health, according to a new study by the U.S. Geological Survey.
The agency found the systemic pesticides in more than half the streams sampled across the country and in Puerto Rico during a survey between 2011 and 2014. This study is the first to take a nationwide look at the prevalence of neonicotinoid insecticides in agricultural and urban settings.
The research spanned 24 states and Puerto Rico and was completed as part of ongoing USGS investigations of pesticide and other contaminant levels in streams.
Neonicotinoids have been found to kill bee’s brain cells, and are also taking a toll on wild bee populations. Use of neonicotinoids has been banned in national wildlife refuges.
European food safety experts are already taking a hard look at the potential for human health impacts, saying that acetamiprid and imidacloprid may have harmful effects on people’s brain development and recommended lowering levels of acceptable exposures. Earlier this year, citing unacceptable hazards to bees — and on the recommendation of the EFSA — the European Union put a two-year moratorium on the use of three widely used neonicotinoids, including imidacloprid. Continue reading
Filed under: biodiversity, Environment, rivers, water, water quality | Tagged: Environment, neonicotinoid pesticides, neonicotinoids, systemic pesticides, USGS, water quality | 2 Comments »
Posted on July 6, 2015 by Bob Berwyn
New USGS study measures North Slope shoreline losses
FRISCO — In the eternal battle between land and sea, the sea appears to be winning in northern Alaska, where much of the coastline is retreating at a rate of more than three feet per year, according to a new study by the U.S. Geological Survey.
The region has some of the highest shoreline erosion rates in the world, according to the research, which analyzed more than 50 years worth of measurements.
“Coastal erosion along the Arctic coast of Alaska is threatening Native Alaskan villages, sensitive ecosystems, energy and defense related infrastructure, and large tracts of Native Alaskan, State, and Federally managed land,” said Suzette Kimball, acting director of the USGS. Continue reading
Filed under: Arctic, climate and weather, extreme weather, global warming | Tagged: Alaska, climate change, coastal erosion, shoreline retreat, USGS | Leave a comment »
Posted on January 31, 2015 by Bob Berwyn
Study pinpoints impacts to island communities & ecosystems
How will islands in the Pacific Ocean be affected by global warming?
FRISCO — Scientists with the U.S. Geological Survey have developed climate models that help show how global warming will change wind and wave patterns, potentially affecting island communities, especially as sea level rises.
The new USGS report looked at U.S. and U.S.-affiliated Pacific Islands, including Hawaii, where climate change is expected to alter the highest waves and strongest winds. The detailed data should help communities develop coastal resilience plans and ecosystem restoration efforts, and to design future coastal infrastructure. Continue reading
Filed under: climate and weather, climate change, Environment, extreme weather, global warming | Tagged: climate change, climate changing wind and waves, climate science, global warming, Pacific Ocean, USGS | 1 Comment »
Posted on December 20, 2014 by Bob Berwyn
Chesapeake Bay in a Landsat photo.
Water temps up 2.5 degrees Fahrenheit in 50 years
FRISCO— The huge Chesapeake Bay watershed — the country’s largest estuary — is warming steadily, USGS scientists say, warning that increase in temperatures is likely to have big consequences for the region’s ecosystems. Continue reading
Filed under: climate and weather, climate change, Environment, global warming, water, water quality | Tagged: Chesapeake Bay, climate change, global warming, USGS, water quality | Leave a comment »
Posted on November 9, 2014 by Bob Berwyn
Close observation of bat behavior around wind turbines may help reduce bat deaths.
Study results may aid bat conservation
FRISCO — Scientists say they may be a step closer to being able to reduce widespread bat mortality associated with the development of wind energy.
Based on months of nighttime video surveillance, U.S. Geological Society researchers say some species of the flying mammals may be mistaking the wind turbines for trees. The tree-roosting bats may be confusing the turbines for trees, according to USGS scientist Paul Cryan.
“If we can understand why bats approach wind turbines, we may be able to turn them away,” Cryan said. “Advances in technology helped us overcome the difficulties of watching small bats flying in the dark around the 40-story heights of wind turbines. The new behaviors we saw are useful clues in the quest to know how bats perceive wind turbines and why they approach them.” Continue reading
Filed under: energy, Environment, wildlife | Tagged: bats, energy, Environment, USGS, wildlife, wind turbine bat deaths, wind turbines | 2 Comments »
Posted on November 9, 2014 by Bob Berwyn
An irrigated hay field in western Colorado.
Per capita water usage drops 11 percent from 2005-2010
FRISCO — A new study by the U.S. Geological Survey shows that overall water use in the U.S. dropped to its lowest level in 45 years. The USGS has tracked national water use since 1950.
The new report shows that total daily withdrawals dropped about 13 percent, from about 410 billion gallons per day in 2005, to 355 billion gallons per day in 2010, mainly from improvements in water-use technologies and management.
“Even as the U.S. population continues to grow, people are learning to be more water conscious and do their part to help sustain the limited freshwater resources in the country,” said Mike Connor, deputy secretary of the Interior. Continue reading
Filed under: agriculture, Environment, water | Tagged: Environment, irrigation public water supplies, per capita water use, USGS, water | Leave a comment »
Posted on October 16, 2014 by Bob Berwyn
Is there mercury in your trout?
National assessment by USGS pinpoints regional mercury hotspots
FRISCO — Widespread mercury contamination is one of the many signs of continued global environmental degradation. Currently, there are fish consumption advisories for mercury in all 50 states in the U.S. Methylmercury concentrations in fish exceed the human health criterion in about one in four U.S. streams.
A new USGS report takes a comprehensive look at mercury contamination in streams across the United States, finding the highest concentrations in the Southeast and in the West, where some streams were degraded by historic mining activities.
Mercury is a potent neurotoxin that accumulates in fish to levels of concern for human health and the health of fish-eating wildlife. Much of the mercury originates from combustion of coal and can travel long distances in the atmosphere before being deposited. This can result in mercury-contaminated fish in areas with no obvious source of mercury pollution. Continue reading
Filed under: Environment, rivers, water, water quality | Tagged: Environment, mercury pollution, mercury stream assessment, USGS, water quality | 1 Comment »