We will be using the Slack platform to gather questions for the virtual poster presenters and lightning talk presenters. Questions can be submitted all day and long after the meeting is over. The time on the Agenda is reserved for a live Q&A session with the virtual poster presenters and lightning talk presenters, where you can converse and get live feedback and responses immediately from the presenters.
If you are interested in participating in the Q&A, please view the Slack FAQ Guide for instructions on how to sign up and join (it is free!).
California is dominated by regulated rivers where water diversions are commonplace. While dams have dramatically altered aquatic ecosystems, these impoundments provide a unique opportunity to support freshwater conservation goals by implementing functional flow regimes designed to mitigate dam-related impacts. Benthic macroinvertebrates (BMIs) are widely accepted as biological indicators of water quality and important food resources for fishes in river systems, yet the effect of streamflow alterations on BMI drift dynamics is still largely unexplored. We collected drift net samples before and during four experimental pulse flows (April 2020) released from Lewiston Dam on the Trinity River in northern California. Sampling occurred four to five times during the ascending limb (500-1500 ft3/s; 14-42 m3/s) of a single pulse flow event at four sites located between 5 and 52 river kilometers downstream of Lewiston Dam. Results explored differences in BMI biomass concentration flux (mg/s) at the varying streamflow magnitudes and the four site locations (i.e., distance from dam). Our results suggest that regulated rivers can be managed to increase BMI availability in the drift, which may have cascading effects on drift-feeding juvenile salmonid populations.
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