2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 9:00 AM - 9:15 AM | PATTERNS OF METABOLISM IN MATCHED TEMPERATE STEPPE ECOREGIONS OF THE US AND MONGOLIA | 250 AB
PATTERNS OF METABOLISM IN MATCHED TEMPERATE STEPPE ECOREGIONS OF THE US AND MONGOLIA
River metabolism data are increasingly available with improved technology, broadening our understanding of rates of metabolism as central indicators of ecosystem function. Changing patterns of human influence and land use vary by biome and interfere with predictions based on changing climate. Mongolia is warming twice as quickly as the US, and the rivers of temperate steppe biome are poorly studied. We discuss whether the riverine metabolic character of these sites is better explained by expectations of biome or ecoregion, or by hydrogeomorphic character driven by land use. We introduce metabolism estimates for 80 sites in the context of hydrogeomorphic and riparian data, using mixed models and path analysis to identify drivers. Principal components regarding hydrogeomorphology explained more than 70% of variation and sites clustered into four groups unrelated to their functional process zone (FPZ) as characterized from remote sensed images. Gross production, ecosystem respiration, and net production varied with continent and upland/lowland wide/constrained designation, but less clearly by ecoregion and individual FPZ. Despite low population density in Mongolia, impacts of grazing cause rivers to exhibit characteristics of more urbanized US streams, indicating how human impacts erode expectations for river systems.
- Light
- Spatial
- Oxygen
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Presenters/Authors
Anne Schechner
(), Kansas State University, anneschechner@ksu.edu;
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Flavia Tromboni
(), University of Nevada, Reno, ftromboni@unr.edu;
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Walter Dodds
(), Kansas State University, wkdodds@ksu.edu;
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