2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/20/2019 | 11:30 AM - 11:45 AM | THERMAL RESPONSES TO RIPARIAN THINNING IN REDWOOD HEADWATER STREAMS AT MULTIPLE SPATIAL SCALES | 151 ABC

THERMAL RESPONSES TO RIPARIAN THINNING IN REDWOOD HEADWATER STREAMS AT MULTIPLE SPATIAL SCALES

Land managers are actively thinning second-growth forests in the redwoods of coastal northern California in order to accelerate the recovery of old-growth forests. These restoration efforts have largely targeted upland forests to date, but now there is interest in applying them to riparian forests. In this study, we evaluated the effects of riparian thinning on riparian shade and light conditions and the influences on the thermal regimes of three redwood headwater stream networks in a watershed-scale field experiment. Preliminary results indicate that decreases in riparian shade and increases in solar radiation associated with experimental riparian thinning treatments resulted in local increases in stream temperature of 1.5 - 2 degrees C. These local increases in temperature extended further downstream between 100-600m and were evident at multiple spatial scales. These initial data suggest that more subtle changes in shade and light associated with riparian thinning treatments can affect thermal conditions of these headwater streams both locally and further downstream. However, the magnitude of these thermal responses and their spatial extent vary with the amount of shade lost. These data provide important information for managers considering riparian management activities in the redwoods.

Temperature
Riparian
Landuse

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Presenters/Authors

David Roon (), Oregon State University, david.roon@oregonstate.edu;