Chemoautotrophic production and respiration in the hyporheic zone of a sonoran desert stream
- Arizona State Univ., Tempe, AZ (United States). Dept. of Zoology
Chemoautotrophic production and respiration (aerobic and anaerobic) were examined along flowpaths in three subsystems in Sycamore Creek, Arizona. Chemoautotrophic production was highest where surface waters enter parafluvial sediments (64 to 76 mgC{center_dot}m{sup {minus}2}{center_dot}d{sup {minus}1}) and lowest in anoxic bank sediments (14 to 16 mgC{center_dot}m{sup {minus}2}{center_dot}d{sup {minus}1}). Aerobic respiration was considerable greater than chemoautotrophy in oxygenated hyporheic and parafluvial zones (2,400 to 4,900 mgC{center_dot}m{sup {minus}2}{center_dot}d{sup {minus}1}). In anoxic bank sediments, respiration was also much greater than chemoautotrophy, but was entirely anaerobic (i.e., methane production; 3,500 mgC{center_dot}m{sup {minus}2}{center_dot}d{sup {minus}1}). Weighting subsystems by areal extent, the largest proportion of aerobic respiration and chemoautotrophic production occurred in parafluvial sediments (64 to 76%), whereas anoxic bank sediments were most important for anaerobic respiration (94% of total anaerobic respiration). Overall, chemoautotrophic production was only 1.0 to 1.3% of respiration and methane production was only 5% of total sediment respiration.
- OSTI ID:
- 37579
- Report Number(s):
- CONF-9403190-; ISBN 1-882132-28-9; TRN: IM9519%%508
- Resource Relation:
- Conference: 2. international conference on ground water ecology, Atlanta, GA (United States), 27-30 Mar 1994; Other Information: PBD: 1994; Related Information: Is Part Of Proceedings of the second international conference on ground water ecology; Stanford, J.A. [ed.] [Univ. of Montana, Polson, MT (United States). Flathead Lake Biological Station]; Valett, H.M. [ed.] [Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Biology]; PB: 400 p.
- Country of Publication:
- United States
- Language:
- English
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