2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 2:00 PM - 3:30 PM | Effects of thiamine and its precursor HMP on growth of periphyton in a mountain stream of the Yangtze River basin, China | Virtual Platform
Effects of thiamine and its precursor HMP on growth of periphyton in a mountain stream of the Yangtze River basin, China
We evaluated the ecological effects of thiamine and one of its precursors 2-methyl-4-amino-5-hydroxymethylpyrimidine (HMP) in Qiyun stream, a headwater mountain stream of a Yangtze River tributary in Southern China using nutrient diffusing substrates. Thiamine limitation and HMP limitation of periphyton were observed in April 2019, and co-limitation by thiamine/ HMP with nitrogen and phosphorus occurred in May 2019. The effect sizes of thiamine and HMP on growth of periphyton were similar to each other. However, physiochemical features of the stream showed different influences on the effects of thiamine and HMP. Water temperature, NH4+, and chlorophyll a concentrations in the stream water each negatively associated with HMP limitation; while soluble reactive phosphorus (SRP) and dissolved oxygen showed positive relationships with the effect of HMP. Light intensity was positively associated with thiamine limitation.
- Stream
- Biogeochemistry
- Microbial ecology
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Presenters/Authors
Binbin Wang
(), Cornell University, bw424@cornell.edu;
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Clifford Kraft
(), Cornell University, cek7@cornell.edu;
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