A dynamic biophysical fugacity model of the movement of a persistent organic pollutant in Antarctic marine food webs

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Title A dynamic biophysical fugacity model of the movement of a persistent organic pollutant in Antarctic marine food webs
Author Cropp, Roger Allan; Kerr, Georgina May; Bengtson Nash, Susan; Hawker, Darryl William
Journal Name Environmental Chemistry
Year Published 2011
Place of publication Australia
Publisher CSIRO
Abstract Polar regions can be repositories for many persistent organic pollutants (POPs). However, comparatively little is known of the movement and behaviour of POPs in Antarctic ecosystems. These systems are characterised by strong seasonal effects of light on plankton dynamics. This work describes a mass-conserving, fugacity-based dynamic model to describe the movement of POPs in the Antarctic physical and plankton systems. The model includes dynamic corrections for changes in the population volumes and the temperature dependence of the fugacity capacities, and was developed by coupling a dynamic Nutrient–Phytoplankton–Zooplankton–Detritus (NPZD) ecosystem model to fugacity models of the chemistry and biology of the Southern Ocean. The model is applied to the movement of hexachlorobenzene, a POP found in the Antarctic environment. The model predicts that the burden of HCB in the plankton varies with the seasonal cycle in Antarctic waters, and induces a seasonal variation in the biomagnification factor of zooplankton. This suggests that time series of POP concentrations in Antarctic biotic and abiotic systems should be measured over complete seasonal cycles. Furthermore, detritus is shown to be a key contributor to the movement of POPs in polar environments, linking physical and biological components of the model.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1071/EN10108
Copyright Statement Copyright 2011 CSIRO. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 8
Issue Number 3
Page from 263
Page to 280
ISSN 1448-2517
Date Accessioned 2011-06-23
Date Available 2012-06-04T22:31:40Z
Language en_US
Research Centre Environmental Futures Research Institute
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Chemistry (incl Atmospheric Chemistry)
URI http://hdl.handle.net/10072/42523
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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