2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/05/2017 | 11:15 AM - 11:30 AM | EFFECTS OF FLOW VARIABILITY ON RIVER METACOMMUNITIES IN A CHANGING CLIMATE | 305A
EFFECTS OF FLOW VARIABILITY ON RIVER METACOMMUNITIES IN A CHANGING CLIMATE
Freshwater flow dynamics are studied with several metrics in the context of global climate change, and one of these approaches involves quantifying flow variation. Though floods and droughts are the primary disturbances studied in relation to macroinvertebrates, inter and intra-annual flow variation has been shown to exert unique pressures on the biological community. In the Sierra Nevada mountains, areas with porous volcanic terrain supply stable spring-fed flow, resulting in less variability than runoff-dominated granite sites. We investigated trends in intra-annual flow variation along ~600km of the Sierra Nevada and related it to the geology. Then, we related regional coefficients of variation to benthic macroinvertebrates and other abiotic variables. In general, we see lower flow variability in areas dominated by volcanic terrain, and the corresponding metacommunities in these regions are more diverse, though with less overall abundance. However, some communities within the same watershed exhibit conflicting abundance and diversity, indicating importance of local processes in dictating flow variability and corresponding community structure, such as agricultural runoff and human diversions. Preliminary results suggest the importance of quantifying patterns of temporal variability in understanding spatial differences in communities.
- C22 Disturbance
- C36 Water Resource Management
- S21 Practical applications of metacommunity theory in stream and river management
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Presenters/Authors
Parsa Saffarinia
(), University of California, Riverside, psaff001@ucr.edu;
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Kurt Anderson
(), University of California, Riverside, kurt.anderson@ucr.edu;
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