2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/05/2017 | 10:00 AM - 10:15 AM | QUANTIFYING CO2 INPUTS INTO BOREAL FOREST STREAMS UNDERLAIN BY DISCONTINUOUS PERMAFROST USING OPEN-SOURCE CO2 SENSORS | 301B
QUANTIFYING CO2 INPUTS INTO BOREAL FOREST STREAMS UNDERLAIN BY DISCONTINUOUS PERMAFROST USING OPEN-SOURCE CO2 SENSORS
Deployment of CO2 sensors in streams provides critical information on processes controlling stream pCO2 throughout time including terrestrial input of CO2 from soil respiration, weathering sources, and in-stream microbial respiration. Recent technological advances in programming and hardware has created opportunities for implementing DIY sensors to assess controls of pCO2 in streams. We programmed open-source CO2 sensors with Arduino microcontrollers to measure pCO2 in streams at the Caribou-Poker Creeks Research Watershed (Fairbanks, AK, USA) in four headwater streams draining watersheds underlain by contrasting amounts of permafrost. We hypothesized that pCO2 in streams draining watersheds underlain by high extents of permafrost is controlled by inputs from soil respiration, and will have greater variability compared with streams draining watersheds underlain by low extent of permafrost because permafrost limits watershed flowpaths to the upper organic layer of soil. Using an autoregressive integrated moving average model, we quantified daily variation in stream pCO2. All streams showed strong diel variability, but had contrasting amplitudes and white noise. These results suggest that pCO2 sensor data provides insight on terrestrial sources from storm responses as well as applications for determining stream metabolism.
- S24 Towards a predictive freshwater ecology: using time-series data to understand and forecast responses to a changing environment
- C10 Biogeochemistry
- S07 Conducting freshwater science with open-source, inexpensive technologies
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Presenters/Authors
Rachel Voight
(), University of Alaska Fairbanks, rlvoight@alaska.edu;
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Jeremy Jones
(), University of Alaska Fairbanks, jbjonesjr@alaska.edu;
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