EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/23/2019 | 9:00 AM - 9:15 AM | WHAT IS WHOLE STREAM RESPIRATION? | 251 AB
WHAT IS WHOLE STREAM RESPIRATION?
Stream respiration is a cornerstone stream ecosystem function, yet respiration is difficult to conceptualize and measure. Here I describe two outstanding questions regarding stream respiration. First is is that we have varying ways of measuring and conceptualizing stream respiration. Oxygen is easy to measure but represents activity of one of a suite of terminal electron acceptors. CO2 is becoming more prevalent but is not often comparable to O2 because in streams with pH>6.3 (i.e. [HCO3] > [CO2)]) CO2 travel distance will be half or less of that of O2 because most of the inorganic C travels as HCO3 and is thus unexchangeable with the atmosphere. Second is understanding the source of carbon fueling respiration. Streams and rivers are usually heterotrophic, but much of respiration is from newly fixed carbon. Time series methods can partition sources of carbon, yet this approach could benefit from corroboration from more mechanistically focused studies. Respiration will continue to challenge stream ecologists; addressing this difficulty will enable better understand the role of rivers in carbon cycling.
- Temporal
- Primary Production
- Metabolism
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Presenters/Authors
Robert O. Hall
(), Flathead Lake Biological Station, University of Montana, bob.hall@flbs.umt.edu;
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