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Grandchildren and global warming

(Santa Barbara, California) "If you want to know what our grandchildren will see when they go scuba diving in the Santa Barbara Channel 50 years from now, just take a look off the coast of Baja California; that's what they will see -- a completely different mix of species," said Steve Gaines, director of the Marine Science Institute at the University of California, Santa Barbara.

"The distribution of species will slide toward the poles," said Gaines.

Gaines, a co-author of the report, "Confronting Climate Change in California, Ecological Impacts on the Golden State," released today, drew a dramatic picture of the results of just a few degrees of temperature change in the years ahead. The report was published by the Union of Concerned Scientists and The Ecological Society of America,

"Many people think that an increase of 3 degrees is no big deal, they compare it to the larger changes from day to night, or day to day," said Gaines. "But we have clear evidence now that the changes in the last 25 to 50 years have had a major effect on tidepool invertebrates, fish and zooplankton.

"With an increase in ocean temperature you get a decrease in available nutrients, which changes the whole food chain," he said.

Besides changes in the general pattern of species distribution caused by climate change, Gaines mentioned that there is also an increase in extreme events like El Nino. Changes at the bottom of the food chain caused by the warmer water temperature of El Nino have ramifications all the way up to marine mammals. "You end up with high mortality of baby seals on the Channel Islands, because their mothers can't get enough food," said Gaines.

"In some ways the impact in California is accentuated by the rich biodiversity of the state," he said. "But that makes the influences on our systems more complex."

Gaines emphasized the importance of planning for a warmer future. "For example, in setting aside a biological reserve we need to th
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Contact: Gail Brown
gbrown@instadv.ucsb.edu
805-893-7220
University of California - Santa Barbara
3-Nov-1999


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