Title: Joint Effects of Nutrients and Contaminants on the Dynamics of a Food Chain in Marine Ecosystems
Authors: BACELAR FloraDUERI SIBYLLEHERNANDEZ GARCIA EmilioZALDIVAR COMENGES Jose'
Citation: MATHEMATICAL BIOSCIENCES vol. 218 no. 1 p. 24-32
Publisher: ELSEVIER SCIENCE INC
Publication Year: 2009
JRC N°: JRC42907
ISSN: 0025-5564
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC42907
DOI: 10.1016/j.mbs.2008.12.002
Type: Articles in Journals
Abstract: We analyze the joint effect of contaminants and nutrient loading on population dynamics of marine food chains by means of bifurcation analysis. Contaminant toxicity is assumed to alter mortality of some species with a sigmoidal dose¿response relationship. A generic effect of pollutants is to delay transitions to complex dynamical states towards higher nutrient load values, but more counterintuitive consequences arising from indirect effects are described. In particular, the top predator seems to be the species more affected by pollutants, even when contaminant is toxic only to lower trophic levels.
JRC Institute:Institute for Environment and Sustainability

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