Joint effects of nutrients and contaminants on the dynamics of a food chain in marine ecosystems - Quantitative Biology > Populations and EvolutionReport as inadecuate




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Abstract: We analyze the joint effect of contaminants and nutrient loading onpopulation dynamics of marine food chains by means of bifurcation analysis.Contaminant toxicity is assumed to alter mortality of some species with asigmoidal dose-response relationship. A generic effect of pollutants is todelay transitions to complex dynamical states towards higher nutrient loadvalues, but more counterintuitive consequences arising from indirect effectsare described. In particular, the top predator seems to be the species moreaffected by pollutants, even when contaminant is toxic only to lower trophiclevels.



Author: Flora S. Bacelar 1, Sibylle Dueri 2, Emilio Hernandez-Garcia 1, Jose-Manuel Zaldivar 2 1 IFISC, 2 JRC

Source: https://arxiv.org/







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