Effects of settling organic matter on the bioaccumulation of cadmium and BDE-99 by Baltic Sea benthic invertebrates.

Abstract:

:Settling organic matter (OM) is the major food source for heterotrophic benthic fauna. The high sorption affinity of many contaminants for OM implies that OM can influence both the distribution and bioavailability of contaminants. Here, we experimentally examine the role of settling OM of various nutritional qualities on the bioaccumulation of cadmium and the flame retardant BDE-99 by three benthic invertebrates; Macoma balthica, Monoporeia affinis and Marenzelleria sp. Contaminants were associated with three types of OM; a microalgae (Tetraselmis spp.), lignin and sediment. Bioaccumulation of Cd was proportional to OM nutritional quality for all three species, and was species-specific in the order Marenzelleria>M. balthica>M. affinis. BDE-99 bioaccumulation was highest in the treatment with the most nutritious OM (Tetraselmis). Consequently, both benthic species composition and the nutritive value of organic matter settling to the seafloor can have a substantial effect on the bioaccumulation of both metals and organic contaminants.

journal_name

Mar Environ Res

authors

Thorsson MH,Hedman JE,Bradshaw C,Gunnarsson JS,Gilek M

doi

10.1016/j.marenvres.2007.11.004

subject

Has Abstract

pub_date

2008-04-01 00:00:00

pages

264-81

issue

3

eissn

0141-1136

issn

1879-0291

pii

S0141-1136(07)00140-7

journal_volume

65

pub_type

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