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Accession Number PB2012-114730
Title Aquatic Macroinvertebrate Monitoring in Shenandoah National Park. 2009 Summary Report.
Publication Date Sep 2012
Media Count 24p
Personal Author E. D. Demarest J. E. B. Wofford
Abstract Shenandoah National Park (SHEN) monitors aquatic macroinvertebrate communities as part of the National Park Service (NPS) Vital Signs Program. Vital signs are a subset of physical, chemical, and biological elements and processes of park ecosystems that are selected to represent the overall health or condition of park resources (Fancy et al. 2009). Within Shenandoah National Park, macroinvertebrates are monitored to help characterize the status and trends of park aquatic ecosystems. In 2009, 34 sites on 24 streams were sampled for aquatic macroinvertebrates. During each site visit, macroinvertebrates were collected, and discharge, water chemistry, and stream habitat parameters were measured. Macroinvertebrate samples included three quantitative (Portable Invertebrate Box Sampler or Surber sampler) and one qualitative sample (D-frame net) at each site. Specimen identification and enumeration was conducted by staff at the Virginia Polytechnic Institute. Of the 34 sites visited in 2009, 28 of these sites were 'primary' sites that are visited every year. The additional six sites were 'secondary' sites that included inventories of new streams or revisits to sites that had not been assessed in more than six years. Based on prior monitoring and research results (Moeykins and Voshell 2002), select macroinvertebrate metrics were assessed to characterize the status and trends of monitoring sites. Metrics in this report include taxa richness, percent EPT (Taxonomic orders of Ephemeroptera, Plecoptera, and Trichoptera), percent intolerant organisms, Simpsonfs diversity index, and the Macroinvertebrate Aggregate Index Score (MAIS). Metrics were summarized by sites according to watershed underlying bedrock geology and associated acid neutralizing capacity (ANC) (Moeykins and Voshell 2002, Cosby et al. 2006).
Keywords Aquatic ecosystems
Aquatic macroinvertebrate
Biological processes
Shenandoah National Park
Water chemistry
Water pollution monitoring

Source Agency National Park Service
NTIS Subject Category 68D - Water Pollution & Control
48B - Natural Resource Management
48G - Hydrology & Limnology
57H - Ecology
Corporate Author Shenandoah National Park, Luray, VA.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1226
Contract Number N/A

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