http://scholars.ntou.edu.tw/handle/123456789/12149
標題: | Picoplankton Dynamics and Their Trophic Roles in the Microbial Food-Web Processes in the Southern East China Sea Upwelling Region During Summer | 作者: | An-Yi Tsai Gwo-Ching Gong Kuo-Ping Chiang Pei-Jung Tsai Chien Fu Chao |
公開日期: | 六月-2014 | 卷: | 25 | 期: | 3 | 來源出版物: | Terrestrial Atmospheric and Oceanic Sciences | 摘要: | We monitored the abundance and biomass of nanoflagellates and their potential prey, heterotrophic bacteria, and Synechococcus spp. five times during the summers in 2010 and 2011. We used size-fractionation to measure growth and grazing rates of heterotrophic bacteria and Synechococcus spp. Temporal changes in surface water chlorophyll a (Chl a) concentrations during our study were caused by an influx of nutrient-rich water upwelling into the surface water. The bacterial growth rates ranged from 0.01 to 0.08 h-1 and grazing rates from 0 to 0.06 h-1. Bacterial growth rate had a positive relationship with Chl a concentration. Furthermore, growth and grazing rates of Synechococcus spp. ranged from 0.01 to 0.09 and 0 to 0.02 h-1, respectively. During the study period about 68% of the bacterial production and 41% of the Synechococcus spp. production was grazed by nanoflagellates in the southern East China Sea upwelling region, thus, a large fraction of bacterial biomass is transferred to higher trophic levels via nanoflagellate grazing. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/12149 | ISSN: | 1017-0839 | DOI: | 10.3319/TAO.2014.01.15.01(Oc) |
顯示於: | 海洋環境與生態研究所 |
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