2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2018 | 9:00 AM - 9:15 AM | IMPACTS OF URBANIZATION ON RIVERINE RESOURCE SUBSIDIES | 310 A
IMPACTS OF URBANIZATION ON RIVERINE RESOURCE SUBSIDIES
Macroinvertebrate drift, aquatic-insect emergence, and terrestrial insect in-fall provide nutrient-dense resource subsidies among spatially separate ecosystems. Does urbanization impact these connections? To assess for potential urbanization impacts, drift nets, emergence traps, and pan traps were deployed to compare the macroinvertebrate and insect communities in 5 rural streams and 5 urban streams in the Clinton River Watershed (Michigan, USA). Drift contained greater macroinvertebrate diversity and richness, and greater emergent insect richness in rural streams compared to urban streams. Path analysis revealed that urbanization had direct negative effects on drift abundance, percent emergent EPT taxa, and insect in-fall abundance. Land use also had indirect effects on drift abundance, percent emergent EPT taxa, and insect in-fall abundance due to changes in conductivity resulting from urbanization. Effect sizes showed that urbanization had the strongest impacts on emergent macroinvertebrates compared to invertebrate drift and terrestrial insect in-fall. Urbanization was shown to negatively influence the connection between streams and riparian ecosystems and the nutrient-dense subsidies that are exchanged between them. These results improve the understanding of the impacts land-use has on resource subsidies and allows environmental managers to make informed decisions regarding resource management.
- Urban
- Riparian
- Landuse
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Presenters/Authors
Catelyn Jones
(), Oakland University, catelynjones@oakland.edu;
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Scott Tiegs
(), Dept. of Biological Sciences, Oakland University, tiegs@oakland.edu;
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