2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2018 | 10:00 AM - 10:15 AM | METABOLIC HETEROGENEITY IN RIVERS OF THE MOUNTAIN STEPPES OF MONGOLIA AND WYOMING | 310 B
METABOLIC HETEROGENEITY IN RIVERS OF THE MOUNTAIN STEPPES OF MONGOLIA AND WYOMING
Riverine metabolism is largely estimated using logged temperature, oxygen, and PAR data from one or two locations within a site. We know little about how probe placement influences estimates of metabolism because we lack knowledge regarding contribution of heterogeneous features to whole river metabolism. We deployed probes in representative habitats of temperate montane steppe rivers of Wyoming and Mongolia to characterize both the metabolism of these systems and how they vary at individual location, reach, and network scales. We used hydrogeomorphic variables alongside sensor data to calculate aeration, and estimated gross primary productivity and ecosystem respiration using models informed by bayesian inference. Probe arrays reflected variable ranges and rates of change of daily temperature and dissolved oxygen saturation. We anticipated higher backwater productivity and respiration, but were surprised by the significant contribution of this overlooked zone to downriver metabolism. Slower, sedimented areas on large river edges cycled between supersaturation and hypoxia daily. We expected larger rivers would mute any diurnal turnover, but found effects of large pool stratification on downstream metabolism and transient storage exchange. Our data suggest consideration of metabolic heterogeneity is key to understanding fundamental ecosystem characteristics.
- Spatial
- Connectivity
- Flow
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Presenters/Authors
Anne Schechner
(), Kansas State University, anneschechner@ksu.edu;
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Walter Dodds
(), Kansas State University, wkdodds@ksu.edu;
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Flavia Tromboni
(), University of Nevada, Reno, ftromboni@unr.edu;
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Sudeep Chandra
(), University of Nevada Reno, Global Water Center, limnosudeep@me.com;
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