2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/25/2021 | 2:00 PM - 3:30 PM | ENVIRONMENTAL VARIABLES INFLUENCE ALGAL COMMUNITIES IN ALPINE STREAMS WITH DIFFERENT HYDROLOGIC SOURCES | Virtual Platform
ENVIRONMENTAL VARIABLES INFLUENCE ALGAL COMMUNITIES IN ALPINE STREAMS WITH DIFFERENT HYDROLOGIC SOURCES
Climate change poses a threat to alpine streams and their algal communities. Hydrologic sources like snowpack, surface glaciers, and rock glaciers are all at risk due to warming temperatures. We characterized algal communities among alpine streams from these sources in the Teton Range, Wyoming, USA. In August 2019, three snowmelt-fed, three surface glacier-fed, and four rock glacier-fed streams were sampled for periphytic algae, anions, cations, and water quality parameters. Rock glacier-fed streams consistently had the lowest water temperature and highest pH and conductivity. Rock glacier-fed streams also had the highest calcium, magnesium, and potassium concentrations, while nitrate and sulfate concentrations were higher in surface glacier-fed streams. Surface glacier-fed and rock glacier-fed streams had lower algal biomass than snowmelt-fed streams. Communities in snowmelt-fed and surface glacier-fed streams were more diverse, including diatoms Hannaea arcus, Odontidium mesodon, and Encyonema spp. that are characteristic of western mountain streams. Rock glacier streams were dominated by upright forms indicative of stable flows, including Gomphonema spp. These are valuable baseline data describing little-known algal communities of alpine streams representing a heterogeneity of hydrologic sources and will be vital to monitoring change as the climate warms.
- Ecological dynamics
- Biodiversity
- Monitoring
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Presenters/Authors
Shannon Weld
(), University of New Mexico, Welds@unm.edu;
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Debra Finn
(), Missouri State University, dfinn@missouristate.edu;
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Lusha Tronstad
(), University of Wyoming, Wyoming Natural Diversity Database, tronstad@uwyo.edu;
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Scott Hotaling
(), Washington State University, scott.hotaling@wsu.edu;
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Rebecca Bixby
(), University of New Mexico, bbixby@unm.edu;
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