HP10 New Advances in Estimating Effects of Toxicants on Populations
1:20 PM - 5:20 PM, Thursday

() Population persistence in real and model ecosystems.

Jepson, P1, 2, 1 Integrated Plant Protection Center, Oregon State University, Corvallis, Oregon, USA2 Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, USA

ABSTRACT- This paper explores the degree to which population risk associated with a given anthropogenic stressor is a function of environmental context. It reviews the literature on population impacts of pestides on aquatic and terrestrial arthropods and a limited range of other taxa, to find evidence for specificity associated with the level and duraction of impact, and the associated environment. It then explores the implications of these findings for the development of population risk assessment, and the challenge of developing models of sufficient generality to be of value within risk assessment procedures. Examples will be taken from the theoretical modeling literature, and from field-based investigations. The field studies selected will exploit data for target and non-target species, to provide a sufficiently rich range of examples for the development and testing of hypotheses.

Key words: risk, population, landscape, model

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