2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/22/2019 | 9:00 AM - 9:15 AM | CLIMATE CHANGE IN HIGH-GRADIENT MOUNTAIN STREAMS: SEARCHING FOR REFUGIA IN A HETEROGENEOUS LANDSCAPE | 250 AB
CLIMATE CHANGE IN HIGH-GRADIENT MOUNTAIN STREAMS: SEARCHING FOR REFUGIA IN A HETEROGENEOUS LANDSCAPE
High-gradient mountain streams have steep ecological turnover in the longitudinal dimension. Research on climate-change effects has emphasized upstream shifts in ecological pattern and process, with the highest reaches typically assumed to be the most vulnerable (the 'summit trap' idea). However, complex topography and hydrological source heterogeneity in mountain stream networks typically makes lotic habitat more mosaic-like than gradient-like. For example, locally cold habitat patches occur in ice-fed headwaters and in mainstems at ice-fed tributary confluences. Increasingly, conservation strategies are emphasizing adaptation to inevitable change, including identification and protection of climate refugia (localities that are relatively buffered from changes in regional climate). The mosaicism inherent to mountain stream networks suggests the possibility for climate refugia in localities with hydrological and/or geomorphological characteristics that confer resistance to long-term climate change. This session will consider cross-disciplinary perspectives from hydrology, geomorphology, and population, community, and ecosystem ecology to begin to synthesize our understanding of potential climate refugia in high-mountain stream networks across the globe. We will also discuss a strategy for long-term monitoring of key ecological responses in mountain streams, data from which can be used to test hypotheses about climate-change refugia.
- Bioindicators
- Hydrology
- Distribution
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Presenters/Authors
Debra Finn
(), Missouri State University, dfinn@missouristate.edu;
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Scott Hotaling
(), Washington State University, scott.hotaling@uky.edu;
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