Anthropogenic Biotic Interchange in a Coral Reef Ecosystem: A Case Study from Guam
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2002-10
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University of Hawai'i Press
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Abstract
Guam is the administrative and economic hub of Micronesia, hosts
one of the largest U.S. military bases in the Pacific, and lies at the crossroads
among Pacific islands, the United States, and Asia. Although terrestrial introductions,
exemplified by the brown tree snake, have received much attention,
marine introductions have been little studied until now. We have documented a
diverse assemblage of marine species brought to Guam by human-mediated
transport: a few intentionally, most unintentionally. Sessile species dominate the
nonindigenous biota. Because of Guam's tourism:'based economy, ballast water
is not a major source of introductions, but ship's hulls have brought many invaders.
A study of the fauna associated with two dry docks demonstrates the
large impact of such structures, moved slowly from harbor to harbor after long
residence times. The majority of nonindigenous species have remained confined
to artificial substrata in the harbor, but some have invaded adjacent coral reef
habitats and spread islandwide. Although several nonindigenous species are now
well established, major impacts to reefs on Guam remain to be identified. Space
on reefs is vastly dominated by indigenous species; in contrast artificial substrata
often have an abundance of nonindigenous species.
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Paulay G, Kirkendale L, Lambert G, Meyer C. 2002. Anthropogenic biotic interchange in a coral reef ecosystem: a case study from Guam. Pac Sci 56(4): 403-422.
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