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<p>Restored wetlands throughout the Midwestern USA are often directly adjacent to active row crop agricultural areas, making them susceptible to contamination from runoff of excess pesticides and nutrients. Increasing urban development across much of the USA has further exposed aquatic systems to impacts from chlorides and other ions that increase conductivity. While the availability of wetland habitats is frequently studied, assessing the quality of these systems often focuses on one aspect at a time (i.e., water quality, nutrient retention, or beta-diversity). We investigated impacts to aquatic macroinvertebrate communities in restored systems by quantifying contaminants in aqueous samples and examining aquatic macroinvertebrate communities from 56 open water areas (ponds) within 41 conservation easements enrolled in the Wetland Reserve Program (WRP). We found infrequent detections (&lt; 30% of samples) of neonicotinoids and atrazine metabolites, and no meaningful correlations were observed with pesticide concentrations and invertebrate communities. Chloride concentrations, while positively correlated with insect and non-insect abundances, exhibited a weak negative association with insect richness, indicating complex interactions within invertebrate communities. The results underscore the need for a nuanced understanding of how hydrologically stable environments influence macroinvertebrate assemblages and highlight the potential disconnect between water chemistry and surrounding land use.</p>

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The persistent adaptability of aquatic macroinvertebrate communities: assessing responses to anthropogenic stressors in central Wisconsin’s restored wetlands

  • 期刊论文

  • 发表日期：

    2025年7月8日

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  • Macayla L. Greider,
  • Jeff P. Lim,
  • Jered M. Studinski

摘要

Restored wetlands throughout the Midwestern USA are often directly adjacent to active row crop agricultural areas, making them susceptible to contamination from runoff of excess pesticides and nutrients. Increasing urban development across much of the USA has further exposed aquatic systems to impacts from chlorides and other ions that increase conductivity. While the availability of wetland habitats is frequently studied, assessing the quality of these systems often focuses on one aspect at a time (i.e., water quality, nutrient retention, or beta-diversity). We investigated impacts to aquatic macroinvertebrate communities in restored systems by quantifying contaminants in aqueous samples and examining aquatic macroinvertebrate communities from 56 open water areas (ponds) within 41 conservation easements enrolled in the Wetland Reserve Program (WRP). We found infrequent detections (< 30% of samples) of neonicotinoids and atrazine metabolites, and no meaningful correlations were observed with pesticide concentrations and invertebrate communities. Chloride concentrations, while positively correlated with insect and non-insect abundances, exhibited a weak negative association with insect richness, indicating complex interactions within invertebrate communities. The results underscore the need for a nuanced understanding of how hydrologically stable environments influence macroinvertebrate assemblages and highlight the potential disconnect between water chemistry and surrounding land use.