EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/23/2019 | 11:15 AM - 11:30 AM | ACROSS ECOSYSTEM INFLUENCES ON AQUATIC BIODIVERSITY IN HIGH ELEVATION LAKE STREAM NETWORKS | 151 G
ACROSS ECOSYSTEM INFLUENCES ON AQUATIC BIODIVERSITY IN HIGH ELEVATION LAKE STREAM NETWORKS
Aquatic biodiversity is hypothesized to be differentially structured across habitat types. However, our understanding of how ecosystem linkages and the extent of spatial scale influence ecological processes structuring biodiversity remains largely unresolved. In this study, I investigate how stream macroinvertebrate diversity is structured across aquatic ecosystems in high elevation lake-stream networks throughout the Sierra Nevada. Lake-stream networks have unique environmental conditions and the differences among catchments explains a large proportion of environmental variation. Within networks, the strong effect of landscape position suggests that environments are changing along a gradient from headwater sites moving down the catchment. Lakes have two primary effects on stream macroinvertebrate communities. Lakes have a homogenizing effect on community and functional diversity at the stream outlets and this influence is reduced moving downstream from the lake. Secondly, lakes are barriers to dispersal for some macroinvertebrate species. Despite connectivity across lakes and streams, the spatial and environmental gradients presented by lakes may influence species dispersal. This research should provide important insights into how biodiversity is structured across connected ecosystems and across spatial scales, especially in light of climate driven hydrological changes to high elevation aquatic ecosystems.
- Biodiversity
- Dispersal
- Connectivity
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Presenters/Authors
Matthew Green
(), University of California Riverside, mgree013@ucr.edu;
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Kurt Anderson
(), University of California, Riverside, kurt.anderson@ucr.edu;
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