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IMPACTS OF POINT-SOURCE NET ALKALINE MINE DRAINAGE (NAMD) ON STREAM MACROINVERTEBRATE COMMUNITIES
Kimmel, W.G. and D.G. Argent.
Journal of Environmental Management 250:109484(2019)
Ten low-order tributaries of the Ohio and Youghiogheny Rivers in southwestern Pennsylvania impacted by point-source inputs of net alkaline mine drainage were selected for assessment of water quality and benthic macroinvertebrate communities. Levels of pH, total Fe, and sulfate (SO4) were significantly elevated in the impacted stream reaches when compared with upstream reference sites, while total alkalinity and specific conductance were equivalent. Macroinvertebrate abundance declined by 92% in the impacted stream reaches, but community structure in terms of taxonomic composition and species richness was similar. Total Fe, total SO4, and specific conductance were significantly linked to macroinvertebrate community impairment. The presence of resident macroinvertebrate communities in the unimpacted reaches suggests that remediation would result in a rapid recolonization and establishment of viable downstream ecosystems.
Journal of Environmental Management 250:109484(2019)
Ten low-order tributaries of the Ohio and Youghiogheny Rivers in southwestern Pennsylvania impacted by point-source inputs of net alkaline mine drainage were selected for assessment of water quality and benthic macroinvertebrate communities. Levels of pH, total Fe, and sulfate (SO4) were significantly elevated in the impacted stream reaches when compared with upstream reference sites, while total alkalinity and specific conductance were equivalent. Macroinvertebrate abundance declined by 92% in the impacted stream reaches, but community structure in terms of taxonomic composition and species richness was similar. Total Fe, total SO4, and specific conductance were significantly linked to macroinvertebrate community impairment. The presence of resident macroinvertebrate communities in the unimpacted reaches suggests that remediation would result in a rapid recolonization and establishment of viable downstream ecosystems.
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