2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 2:00 PM - 3:30 PM | SEASONAL AND SPATIAL VARIATION IN TEMPERATURE AND DISSOLVED OXYGEN REGIMES IN HIGH ELEVATION PONDS IN THE SIERRA NEVADA, CALIFORNIA | Virtual Platform
SEASONAL AND SPATIAL VARIATION IN TEMPERATURE AND DISSOLVED OXYGEN REGIMES IN HIGH ELEVATION PONDS IN THE SIERRA NEVADA, CALIFORNIA
Ponds are globally abundant and often regionally outnumber lakes, yet we lack an understanding of their relative importance in a landscape context despite emerging evidence that they are hotspots of carbon cycling and subsidize terrestrial food webs. The Sierra Nevada mountains of California contain thousands of ponds, yet their physical and chemical dynamics remain undocumented, despite their potential sensitivity to observed climatic changes at high elevations.
We characterized stratification dynamics, thermal regimes, and ecosystem metabolism in ponds at the within-basin and among-basin scale, and investigated seasonal variation in a subset of these ponds. We measured 24-hour high frequency temperature and dissolved oxygen and collected water chemistry, pCO2, and oxygen isotope samples in 10 sub-alpine and alpine ponds along an elevational gradient throughout the Sierra Nevada in 2019. We compared these measurements with nearby lakes and found that ponds generally have higher diel temperature variation and CO2 saturation. In 2020, we measured high frequency temperature and dissolved oxygen in 10 ponds in a single basin continuously throughout the summer. Ponds stratified daily and mixed nightly throughout the season, with deeper ponds showing stronger thermal stratification than shallower ponds.
- Ecosystem Dynamics
- Ecosystem functioning
- Nutrients
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Presenters/Authors
Mary Farruggia
(), University of California Davis, mjfarruggia@ucdavis.edu;
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Steve Sadro
(), University of California, Davis, ssadro@ucdavis.edu;
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Adrianne Smits
(), University of California, Davis, asmits@ucdavis.edu;
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