Dead birds indicate possible disruption to earth's food chain...
With a record number of dead seabirds washing up on West Coast beaches from Central California to British Columbia, marine biologists are raising the alarm about rising ocean temperatures and dwindling plankton populations.
"Something big is going on out there," said Julia Parrish, an associate professor in the School of Aquatic Fisheries and Sciences at the University of Washington. "I'm left with no obvious smoking gun, but birds are a good signal because they feed high up on the food chain."
Coastal ocean temperatures are 2 to 5 degrees above normal, which may be related to a lack of updwelling, in which cold, nutrient-rich water is brought to the surface.
Updwelling is fueled by northerly winds that sweep out near-shore waters and bring cold water to the surface. The process starts the marine food chain, fueling algae and shrimplike krill populations that feed small fish, which then provide a source of food for a variety of sea life from salmon to sea birds and marine mammals.
On Washington beaches, bird surveyors in May typically find an average of one dead Brandt's cormorant every 34 miles of beach. This year, cormorant deaths averaged one every eight-tenths of a mile, according to data gathered by volunteers with the Coastal Observation and Seabird Survey Team, which Parrish has directed since 2000.
"This is somewhere between five and 10 times the highest number of bird deaths we've seen before," she said, adding that she expected June figures to show a similar trend. (more...)
2 comments:
That is a very interesting article. I wonder if the rise of times is comming and these are signals to change are ways.
It looks as if the same rise in temperature that lead to the dead birds had alot to do with the recent Category IV hurricane which destroyed the entire city of New Orleans, turning it into a war zone indeed...
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