Retrospective estimation of population-level effect of pollutants based on local adaptation and fitness cost of tolerance

Yoshinari Tanaka, Haruki Tatsuta

Research output: Contribution to journalArticlepeer-review

Abstract

We present a novel framework for estimating site-specific effects of pollutants on natural populations. Our method is based on fitness optimization and uses observed differences in tolerance (sensitivity) to a particular pollutant between populations at contaminated and uncontaminated sites (i.e., target and reference populations). In addition, the method uses laboratory estimates of the fitness cost of tolerance, that is, the reduction of population growth rate (fitness) of a target population compared to that of a reference population when both are maintained in uncontaminated conditions. As a case study, we applied this framework to analyze observed genetic differentiation in tolerance to the pyrethroid insecticide fenvalerate between Daphnia galeata populations in Lake Kasumigaura and an adjacent agricultural pond. The estimated exposure level at the contaminated site was about 0.015 μg/L, and the population-level risk corresponded to about a 24 % reduction of the intrinsic rate of natural increase.

Original languageEnglish
Pages (from-to)795-802
Number of pages8
JournalEcotoxicology
Volume22
Issue number5
DOIs
Publication statusPublished - Jul 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Toxicology
  • Management, Monitoring, Policy and Law
  • Health, Toxicology and Mutagenesis

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