Adapting population models for application in pesticide risk assessment: A case study with Mead's milkweed

Environmental Toxicology and Chemistry
Amelie SchmolkeV E Forbes

Abstract

Population models can facilitate assessment of potential impacts of pesticides on populations or species rather than individuals and have been identified as important tools for pesticide risk assessment of nontarget species including those listed under the Endangered Species Act. Few examples of population models developed for this specific purpose are available; however, population models are commonly used in conservation science as a tool to project the viability of populations and the long-term outcomes of management actions. We present a population model for Mead's milkweed (Asclepias meadii), a species listed as threatened under the Endangered Species Act throughout its range across the Midwestern United States. We adapted a published population model based on demographic field data for application in pesticide risk assessment. Exposure and effects were modeled as reductions of sets of vital rates in the transition matrices, simulating both lethal and sublethal effects of herbicides. Two herbicides, atrazine and mesotrione, were used as case study examples to evaluate a range of assumptions about potential exposure-effects relationships. In addition, we assessed buffers (i.e., setback distances of herbicide spray applicati...Continue Reading

References

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May 28, 2017·The Science of the Total Environment·Amelie SchmolkeValery Forbes
Dec 23, 2017·Integrated Environmental Assessment and Management·Sandy RaimondoJill Awkerman

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Citations

Nov 27, 2020·Integrated Environmental Assessment and Management·Sandy RaimondoValery Forbes
Jul 6, 2021·Journal of Toxicology and Environmental Health. Part B, Critical Reviews·Philip N SmithKeith R Solomon

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