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<p>A history of industrialization, oil spills, fires, and silt pollution from agriculture and urbanization led to the Ohio River being listed as one of the most polluted rivers in the USA. The Ohio River Valley Water Sanitation Commission (ORSANCO) and its members responded and conducted monitoring programs for pollutants to monitor water quality. ORSANCO collected annual macroinvertebrate samples at multiple locations using Hester–Dendy samplers. Collections using Hester–Dendy samplers from 1968 to 2004 resulted in 2,934,984 macroinvertebrates in 75 families and 321 species. We tested for temporal variation in trait (functional feeding groups) and taxonomic abundances of Ohio River macroinvertebrates. Our PCA analysis using trophic and tolerance traits resulted in significant temporal patterns. Macroinvertebrate richness increased following implementation of the federal Clean Water Act of 1972. Most trophic traits increased in abundance more recently. We interpreted these patterns as evidence for improvements in water quality and associated macroinvertebrate assemblages.</p>

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Temporal variation in macroinvertebrate assemblage structure in the Ohio River, USA

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Esther Atutey,
  • Mark Pyron

摘要

A history of industrialization, oil spills, fires, and silt pollution from agriculture and urbanization led to the Ohio River being listed as one of the most polluted rivers in the USA. The Ohio River Valley Water Sanitation Commission (ORSANCO) and its members responded and conducted monitoring programs for pollutants to monitor water quality. ORSANCO collected annual macroinvertebrate samples at multiple locations using Hester–Dendy samplers. Collections using Hester–Dendy samplers from 1968 to 2004 resulted in 2,934,984 macroinvertebrates in 75 families and 321 species. We tested for temporal variation in trait (functional feeding groups) and taxonomic abundances of Ohio River macroinvertebrates. Our PCA analysis using trophic and tolerance traits resulted in significant temporal patterns. Macroinvertebrate richness increased following implementation of the federal Clean Water Act of 1972. Most trophic traits increased in abundance more recently. We interpreted these patterns as evidence for improvements in water quality and associated macroinvertebrate assemblages.