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Water Signatures: Hidden environmental cues and biodiversity

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Dec 9, 6:30 PM - 7:30 PM
NCC Campus N12 (Multipurpose Center)
250 Sierra College Dr., Grass Valley, CA 95945
Jason Giuliani,, (530) 274-5275
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The Nevada County Campus 2014-15 Sierra Science Lecture Series

Event Details

The Sierra College Nevada County Campus Sierra Science Series presents: Water Signatures: Hidden Environmental Cues and Biodiversity, with Ryan Peek. The presentation will be held on Tuesday evening, December 9, from 6:30 – 7:30 pm, in the Multipurpose Center, building, N-12. Come early and enjoy a meet-and-greet and refreshments at 6:00 pm.

How do water signatures (i.e., water chemistry) play a role in temporal and spatial patterns of biodiversity in Sierran rivers? With changing climate and river regulation, natural patterns of snowmelt hydrology commonly observed in unregulated rivers in the Sierra Nevada have been altered, particularly in regulated reaches. Many native spring spawners (rainbow trout, hardhead, foothill yellow-legged frogs, etc) have evolved strong links to snowmelt recession cues such as the rate of flow change and water temperature. Recent advances in molecular NGS (Next Generation Sequencing) technologies and new methods used to extract DNA from water samples allow the analysis of "eDNA" or environmental DNA to determine species presence. By taking many samples over time and space, we can begin to assess how dynamic biodiversity might be, and how it may link to the hydrology & water chemistry patterns. 

About our Presenter: Ryan Peek is a researcher with the UC Davis Center for Watershed Sciences. His research experience includes extensive analyses of freshwater ecosystems throughout CA and OR, with special focus on hydropower regulation and environmental management of rivers and streams in the Sierra Nevada. He was the field lead and one of the main authors for the Spring Recession Project and has contributed to PISCES, Mountain Meadows, CEC Yuba, and Freshwater Conservation projects. 

This presentation is free, and the public is welcome and encouraged to attend. The Nevada County Campus is located at 250 Sierra College Drive, Grass Valley, CA 95945. Parking is $3 on campus and permits can be purchased at the kiosk machine at the main entrance to the campus.

For more information about this presentation and others in this series, contact the series coordinator, Jason Giuliani at:

Sponsored by: Nevada County Campus, Natural History Museum

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