Macrofaunal recolonization of copper-contaminated sediments in San Diego Bay

MARINE POLLUTION BULLETIN

卷:101

Article

Neira, Carlos^1,2  Mendoza, Guillermo^1,2  Porrachia, Magali³  Stransky, Chris⁴  Levin, Lisa A.^1,2 

[1] Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093 USA

[2] Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, La Jolla, CA 92093 USA

[3] Scripps Inst Oceanog, Geosci Res Div, La Jolla, CA 92093 USA

[4] AMEC Environm & Infrastruct, San Diego, CA 92123 USA

关键词: Recolonization;    Copper pollution;    Macrofauna diversity;    Sediment;    San Diego Bay;    California;   

DOI  :  10.1016/j.marpolbul.2015.09.023

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free