EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/20/2019 | 12:00 PM - 12:15 PM | THIAMINE INFLUENCES THE GROWTH OF ALGAE IN STREAMS | 254 B
THIAMINE INFLUENCES THE GROWTH OF ALGAE IN STREAMS
The influence of thiamine on the growth of marine phytoplankton has been studied for decades, while we know little about its impact on freshwater systems. A nutrient amendment experiment conducted in Adirondack streams for the first time found thiamine limitation to the growth of primary producers in freshwaters. Thiamine and nitrogen promoted the growth of Chlorophyta, one of the main taxonomic groups in the study stream periphyton. The percentage of Chlorophyta in terms of cell numbers was as high as 46.9%, and 45.4% when thiamine or nitrogen was provided, respectively, compared to 26.9% on the nutrient diffusing substrates without added nutrients. Scenedesmus was one of the main genera of periphyton found in this Adirondack stream; the cell density of Scenedesmus in in situ treatments with added thiamine or nitrogen reached 6.1, and 14.1 times that of the control treatment, respectively. In a laboratory incubation study with Scenedesmus obliquus, one common species of Scenedesmus, thiamine promoted growth by enhancing the efficiency of its nitrogen utilization. By contrast, thiamine did not promote growth when very low or zero nitrogen was provided in these lab experiments.
- Algae
- Primary Production
- Microbial
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Presenters/Authors
Binbin Wang
(), Cornell University, bw424@cornell.edu;
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