2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/26/2021 | 8:30 AM - 10:30 AM | Spatial heterogeneity in stream biofilm communities and organic matter processing in an agricultural stream network: Does groundwater play a role? | Virtual Platform
Spatial heterogeneity in stream biofilm communities and organic matter processing in an agricultural stream network: Does groundwater play a role?
Groundwater contributions to stream water can affect the availability of nutrients and moderate temperature, influencing spatial and temporal heterogeneity in environmental conditions. However, the role of groundwater as a driver of spatial and temporal heterogeneity in ecological conditions within stream networks is not well understood. To evaluate the association between groundwater and ecological communities and processes, we assessed stream biofilm communities (biomass and diatom taxonomy) and cellulose decomposition over 4 seasons in 19 reaches that exhibit variable groundwater input within an agricultural stream network in Ontario, Canada. Radon and temperature were measured as proxies for groundwater input. Seasonal variations in water temperatures were shown to structure diatom assemblage and cellulose decomposition at the network scale. Moreover, there were clear seasonal patterns taxa succession observed in the diatom assemblages that transcended groundwater influence. However, within season assessments of biofilms did not reveal any associations with proxies of groundwater inputs for algal biomass, diatom taxonomy or cellulose decomposition observed in individual reaches. Reach- and patch-scale studies will be undertaken to further evaluate the role of groundwater influence on ecological conditions in streams.
- Ecological dynamics
- Biodiversity
- Decomposition
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Presenters/Authors
Lauren Banks
(), University of Waterloo, l2banks@uwaterloo.ca;
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Isabelle Lavoie
(), Institut National de la Recherche Scientifique, Centre Eau Terre Environnement, isabelle.lavoie@ete.inrs.ca;
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Clare Robinson
(), Western University, crobinson@uwo.ca;
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Jim Roy
(), Environment and Climate Change Canada, jim.roy@canada.ca;
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Shayla Kroeze
(), Western University & Canadian Rivers Institute, skroeze@uwo.ca;
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Nicole Gotkowski
(), Western University & Canadian Rivers Institute, ngotkows@uwo.ca;
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Max Boreux
(), Western University, mboreux@uwo.ca;
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Adam Yates
(), University of Waterloo, adam.yates@uwaterloo.ca;
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