2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/25/2021 | 2:00 PM - 3:30 PM | THE STREAM-LAKE INTERFACE: PRODUCTIVITY AND THE CONSEQUENCES OF FOREST HARVEST | Virtual Platform
THE STREAM-LAKE INTERFACE: PRODUCTIVITY AND THE CONSEQUENCES OF FOREST HARVEST
Forest harvesting (FH) can adversely affect lake and stream biota by altering sediment and nutrient inputs, and food availability. Small lakes are productive ecosystems, and they connect the terrestrial and aquatic by way of lake-inflow streams. However, downstream contributions, especially to lakes, are rarely measured or considered within FH management. Our research investigated stream-inflow contributions and the effects on lake productivity from FH along inflow streams within British Columbia. We compared communities along lake shorelines fed by streams that have been recently harvested, or undisturbed, and shoreline areas without stream inflows nearby. We tested the hypothesis that biotic communities within lakes are altered from changes in biotic and abiotic inputs induced by upstream harvesting activities. Consistent with our predictions, we found higher relative invertebrate abundance and algal biomass in stream inflow areas compared to shoreline areas. Our results also demonstrate higher relative invertebrate abundance and algal chlorophyll-a measures in undisturbed compared to disturbed stream-inflow sites. There was no statistical difference in algal biomass between undisturbed and disturbed stream-inflow sites. These results advance our understanding of FH disturbance in relation to stream-lake connectivity.
- Land use
- Stream
- Ecosystem
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Presenters/Authors
Mariella Becu
(), The University of British Columbia, mariella.becu@ubc.ca;
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