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Share Many seabirds in the Northern Hemisphere are struggling to breed and in the Southern Hemisphere, they may not be far behind. These are the conclusions of a study, published May 27 in Science, analyzing more than 50 years of breeding records for 67 seabird species worldwide. The international team of scientists led by William Sydeman at the Farallon Institute in California discovered that reproductive success decreased in the past half century for fish-eating seabirds north of the equator. The Northern Hemisphere has suffered greater impacts from human-caused climate change and other human activities, like overfishing. Seabirds include albatrosses, puffins, murres, penguins and other birds. Whether they soar or swim, all seabirds are adapted to feed in and live near ocean waters. Many scientists view seabirds as sentinels of habitat health because their lives and well-being depend on sound conditions both on land and at sea, said co-author P. Dee Boersma, a ....
These are the conclusions of a study in Science analyzing more than 50 years of breeding records for 67 seabird species worldwide. The researchers discovered that reproductive success decreased in the past half century for fish-eating seabirds north of the equator. The Northern Hemisphere has suffered greater effects from human-caused climate change and other human activities, like overfishing. Seabirds include albatrosses, puffins, murres, penguins, and other birds. Whether they soar or swim, all seabirds are adapted to feed in and live near ocean waters. Many scientists view seabirds as sentinels of habitat health because their lives and well-being depend on sound conditions both on land and at sea, says coauthor P. Dee Boersma, a professor of biology at the University of Washington and director of the Center for Ecosystem Sentinels. ....
Scientific American Struggling Seabirds Are Red Flag for Ocean Health These sentinels of marine ecosystems point to the damage climate change, overfishing and other human pressures are causing Advertisement Seabirds are “sentinels” of ocean health. If marine ecosystems are suffering, the birds will be among the first to show it. Now a major study finds that seabirds in the Northern Hemisphere are already struggling. And without extra precautions, those in the Southern Hemisphere might be next. The findings point to broader patterns of environmental change across the world’s oceans. Climate change, combined with pollution, overfishing and other human activities, is steadily altering marine food webs. Food sources are shifting. Some fish populations are dwindling or migrating to new areas. ....
E-Mail IMAGE: A common murre delivering an anchovy to its chick on Southeast Farallon Island, California. view more Credit: Ron LeValley Many seabirds in the Northern Hemisphere are struggling to breed and in the Southern Hemisphere, they may not be far behind. These are the conclusions of a study, published May 28 in Science, analyzing more than 50 years of breeding records for 67 seabird species worldwide. The international team of scientists led by William Sydeman at the Farallon Institute in California discovered that reproductive success decreased in the past half century for fish-eating seabirds north of the equator. The Northern Hemisphere has suffered greater impacts from human-caused climate change and other human activities, like overfishing. ....