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Macrobenthic community response to copper in Shelter Island Yacht Basin, San Diego Bay, California |
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| Authors: | Neira Carlos Mendoza Guillermo Levin Lisa A Zirino Alberto Delgadillo-Hinojosa Francisco Porrachia Magali Deheyn Dimitri D |
| Institution: | a Integrative Oceanography Division, Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0218, USA b Department of Marine and Environmental Science, University of San Diego, 5998 Alcala Park, San Diego, CA 92110-2476, USA c Instituto de Investigaciones Oceanólogicas, Universidad Autónoma de Baja California, Ensenada, Mexico d Geosciences Research Division, Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0244, USA e Marine Biology Research Division, Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0202, USA |
| Abstract: | We examined Cu contamination effects on macrobenthic communities and Cu concentration in invertebrates within Shelter Island Yacht Basin, San Diego Bay, California. Results indicate that at some sites, Cu in sediment has exceeded a threshold for “self defense” mechanisms and highlight the potential negative impacts on benthic faunal communities where Cu accumulates and persists in sediments. At sites with elevated Cu levels in sediment, macrobenthic communities were not only less diverse but also their total biomass and body size (individual biomass) were reduced compared to sites with lower Cu. Cu concentration in tissue varied between species and within the same species, reflecting differing abilities to “regulate” their body load. The spatial complexity of Cu effects in a small marina such as SIYB emphasizes that sediment-quality criteria based solely on laboratory experiments should be used with caution, as they do not necessarily reflect the condition at the community and ecosystem levels. |
| Keywords: | Macrofauna Copper pollution Sediment Community diversity Biomass California |
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