Long-term decline of coral reef ecosystems reported

(Santa Barbara, Calif.) An article in the August 15 issue of the journal Science warns against the human exploitation of coral reef ecosystems around the world, noting that these "ecosystems will not survive for more than a few decades, unless they are promptly and massively protected from human exploitation."

This warning comes out of a study of 14 coral reef ecosystems around the world conducted by a team of scientists organized by the National Center for Ecological Analysis and Synthesis (NCEAS). The Center is affiliated with the University of California, Santa Barbara and funded by the National Science Foundation.

The report's co-authors include UCSB researchers Robert Warner, professor of ecology, evolution and marine biology and Deborah McArdle, a doctoral student and marine advisor for the California Sea Grant program. They studied the history of coral reefs surrounding the Virgin Islands.

"There is a wide source of past information that hasn't been mined," said McArdle. For the study, she and other researchers searched out old books, information from historical societies, missionary reports, ship log books, naturalist sightings, and oral histories pertaining to the status of coral reef ecosystems over time. McArdle attended a conference on the history of marine animal populations where she met with representatives from Denmark to obtain information on past fisheries. (The Virgin Islands were once a territory of Denmark and many historical records about the natural history of the Virgin Islands are held in Denmark.) "Looking at historical records can redefine what normal is and redefine what restoration targets should be," said McArdle. "Traditionally, managers look back 10 to 20 years, but we may need to set our goals on baselines that existed further back in time."

The ecological histories were set up using consistent criteria, grading the reefs from pristine to extinct for seven categories of biota: large herbivores, lar

Contact: Gail Gallessich
University of California - Santa Barbara

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