EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/24/2018 | 9:45 AM - 10:00 AM | THE IMPACTS OF AN AGRICULTURAL TO URBAN LAND COVER GRADIENT ON HABITAT, FISH, AND MACROINVERTEBRATES IN A COLDWATER STREAM | 330 B
THE IMPACTS OF AN AGRICULTURAL TO URBAN LAND COVER GRADIENT ON HABITAT, FISH, AND MACROINVERTEBRATES IN A COLDWATER STREAM
Throughout the United States and world, urban areas are often built along large rivers and surrounded by agricultural land cover. Examples are metropolitan areas along the Grand River in Michigan, USA. Tributaries that flow through these areas have agricultural headwaters and an urbanized lower watershed. This land cover gradient can have significant impacts on the chemical, physical, and biological attributes of lotic ecosystems. Our objective was to assess the impacts of environmental stressors (riffle and pool habitat variability, riparian vegetation condition, sediment loading, substrate composition, stream temperature, water velocity, and instream woody debris abundance) on fish and macroinvertebrate communities across a gradient of agricultural to urban land cover in a coldwater tributary of the Grand River called Indian Mill Creek. Instream woody debris was the strongest driver of EPT abundance and richness, especially in agricultural headwaters. Fine streambed substrate was associated with a high abundance of Diptera and surface air breathers, and was most dominant in agricultural headwaters. Fish community assemblage was driven largely by stream flow and temperature regimes and could be impacted by episodic pollution events that have occurred within the lower, urbanized watershed. Impacts of agricultural and urban land cover to lotic ecosystems are prevalent worldwide; therefore, this study has broad applications.
- Multi-stressors
- Watershed
- Habitat
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Presenters/Authors
Dan Myers
(), Grand Valley State University, myersda@mail.gvsu.edu;
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