2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/26/2021 | 8:30 AM - 10:30 AM | STREAM FOOD WEB RESPONSES TO RIPARIAN THINNING IN SECOND-GROWTH REDWOOD FORESTS OF NORTHERN CALIFORNIA | Virtual Platform
STREAM FOOD WEB RESPONSES TO RIPARIAN THINNING IN SECOND-GROWTH REDWOOD FORESTS OF NORTHERN CALIFORNIA
Resource managers are interested in thinning second-growth riparian forests to enhance aquatic productivity in watersheds of the Pacific Northwest. However, increases in aquatic productivity depend on and can be mediated by the trophic pathways that link riparian forests to streams. To determine how riparian thinning influenced the trophic pathways supporting stream fish and amphibians, we employed a manipulative field experiment in three watersheds in the redwoods of northern California. We hypothesized that experimental thinning treatments would increase solar radiation, which would increase the abundance of stream periphyton, which in turn would influence the seasonal and spatial dynamics of the food webs supporting stream fish and amphibians. To test these hypotheses we measured: stream periphyton abundance, macroinvertebrate communities in the diets of top predators - coastal giant salamanders and coastal cutthroat trout, and stable isotopes. In this presentation we share preliminary results on how stream food webs responded to riparian thinning. Data from this study provide a whole-system, mechanistic understanding of how the food webs that link streams and riparian forests may shift in response to proposed forest restoration actions in second-growth riparian forests.
- Stream restoration
- Land use
- Aquatic–terrestrial biodiversity
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Presenters/Authors
David Roon
(), Oregon State University, david.roon@oregonstate.edu;
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Jason Dunham
(), U. S. Geological Survey, jdunham@usgs.gov;
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