https://scholars.lib.ntu.edu.tw/handle/123456789/573351
標題: | Extreme weather events enhance doc consumption in a subtropical freshwater ecosystem: A multiple-typhoon analysis | 作者: | Lai, Chao-Chen CHIA-YING KO Austria, Eleanor Shiah, Fuh-Kwo |
關鍵字: | Bacteria; Climatic changes; Microbial ecology; Organic carbon cycling; Reservoir; Typhoons | 公開日期: | 2021 | 卷: | 9 | 期: | 6 | 來源出版物: | Microorganisms | 摘要: | Empirical evidence suggests that the frequency/intensity of extreme weather events might increase in a warming climate. It remains unclear how these events quantitatively impact dissolved organic carbon (DOC), a pool approximately equal to CO2 in the atmosphere. This study conducted a weekly-to-biweekly sampling in a deep subtropical reservoir in the typhoonprevailing season (June to September) from 2004 to 2009, at which 33 typhoons with distinctive precipitation (<1~362 mm d?1 ) had passed the study site. Our analyses indicated that the phosphate (i.e., DIP; <10~181 nMP) varied positively with the intensity of the accumulated rainfall 2-weeks prior; bacteria growth rate (0.05~3.68 d?1 ) behaved as a positive function of DIP, and DOC concentrations (54~119 ?MC) changed negatively with bacterial production (1.2~26.1 mgC m?3 d?1 ). These implied that the elevated DIP-loading in the hyperpycnal flow induced by typhoons could fuel bacteria growth and cause a significant decline of DOC concentrations. As the typhoon’s intensity increases, many mineral-limited lentic freshwater ecosystems might become more like a CO2 source injecting more CO2 back to the atmosphere, creating a positive feedback loop that might generate severer extreme weather events. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106979524&doi=10.3390%2fmicroorganisms9061199&partnerID=40&md5=beb30eae95bd56d648cb792db0c80162 https://scholars.lib.ntu.edu.tw/handle/123456789/573351 |
ISSN: | 20762607 | DOI: | 10.3390/microorganisms9061199 |
顯示於: | 漁業科學研究所 |
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