https://scholars.lib.ntu.edu.tw/handle/123456789/322262
標題: | Estimated net community production during the summertime at the SEATS time-series study site, northern South China Sea: Implications for nitrogen fixation | 作者: | CHUN-MAO TSENG YIING-JANG YANG |
公開日期: | 2006 | 卷: | 33 | 期: | 22 | 來源出版物: | Geophysical Research Letters | 摘要: | The continuous summertime drawdown of normalized dissolved inorganic carbon has been observed repeatedly in the mixed-layer at the South East Asia Time-series Study (SEATS) site, northern South China Sea (SCS) between March 2002 and November 2004. Mass balance calculation reveals that a net community production (NCP) of -4.47 mmolC m-2 day-1 is responsible for this drawdown. Nonetheless, bioavailable nitrogen (Nbio) from atmospheric deposition, vertical diffusion, and N2-fixation by Trichodesmium and Richelia together could only account for ∼55% of Nbio required for the calculated NCP. Unicellular cyanobacteria, which are identified unambiguously by the presence of nitrogenase genes (nifH) in 1-10 μm fraction of planktons collected at SEATS, may account for the Nbio deficit. Our results, thus, support the potential importance of unicellular cyanobacteria in providing an additional Nbio source in oligotrophic waters such as the SCS. Copyright 2006 by the American Geophysical Union. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-34548561626&partnerID=40&md5=39cc3457b79a399185932b49fbd34605 http://scholars.lib.ntu.edu.tw/handle/123456789/322262 |
DOI: | 10.1029/2005GL025365 | SDG/關鍵字: | Carbon; Marine biology; Seawater; Time series analysis; Atmospheric deposition; Bioavailable nitrogen; Mass balance calculation; Unicellular cyanobacteria; Vertical diffusion; Nitrogen fixation; cyanobacterium; mass balance; net primary production; nitrogen cycle; nitrogen fixation; oligotrophic environment; time series analysis; Pacific Ocean; South China Sea; Cyanobacteria; Richelia; Trichodesmium |
顯示於: | 海洋研究所 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。