Macrofaunal recolonization of copper-contaminated sediments in San Diego Bay

TitleMacrofaunal recolonization of copper-contaminated sediments in San Diego Bay
Publication TypeJournal Article
Year of Publication2015
AuthorsNeira C., Mendoza G., Porrachia M., Stransky C., Levin L.A
JournalMarine Pollution Bulletin
Volume101
Pagination794-804
Date Published2015/12
Type of ArticleArticle
ISBN Number0025-326X
Accession NumberWOS:000367107600039
Keywordsacidification; benthic communities; cadmium; california; climate-change; Copper pollution; Diego Bay; environmental-impact; heavy-metals; Macrofauna diversity; marine soft-sediments; metal contamination; ocean; Recolonization; San; sediment; toxicity; trace-metals
Abstract

Effects of Cu-loading on macrofaunal recolonization were examined in Shelter Island Yacht Basin (San Diego Bay, California). Sediments with high and low Cu levels were defaunated and Cu-spiked, translocated, and then placed back into the environment These demonstrated that the alteration observed in benthic communities associated with Cu contamination occurs during initial recolonization. After a 3-month exposure to sediments with varying Cu levels, two primary colonizing communities were identified: (1) a "mouth assemblage" resembling adjacent background fauna associated with low-Cu levels that was more diverse and predominantly dominated by surface- and subsurface-deposit feeders, burrowers, and tube builders, and (2) a "head assemblage" resembling adjacent background fauna associated with high-Cu concentrations, with few dominant species and an increasing importance of carnivores and mobile epifauna. Cu loading can cause reduced biodiversity and lower structural complexity that may last several months if high concentrations persist, with a direct effect on community functioning. (C) 2015 Elsevier Ltd. All rights reserved.

DOI10.1016/j.marpolbul.2015.09.023
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