Size-dependent phytoplankton growth and grazing in the northern South China Sea
文献类型：期刊论文
| 作者 | Dong, Y; Li, QP; Liu, ZJ; Wu, ZC; Zhou, WW; qianli@scsio.ac.cn |
| 刊名 | MARINE ECOLOGY PROGRESS SERIES
 |
| 出版日期 | 2018 |
| 卷号 | 599页码:35-47 |
| 关键词 | Size-fractionated Chlorophyll Size-specific Phytoplankton Growth Microzooplankton Grazing South China Sea |
| 英文摘要 | Field surveys of the northern South China Sea (NSCS) were conducted during the summer of 2015 and 2016 with size-fractionated chlorophyll a (chl a) measurements and sizespecific dilution experiments for 3 phytoplankton size classes, including micro-(20 to 200 mu m), nano-(2 to 20 mu m), and picophytoplankton (< 2 mu m). Our results suggest that phytoplankton size structure and size-specific rates of growth and grazing mortality could vary substantially along the coastal, transition, and oceanic zones of the NSCS. There was an elevated microphytoplankton concentration in the inner shelf, in contrast to the dominance of nanophytoplankton over the middle and outer shelves. However, the phytoplankton community was mostly dominated by picocells in the oligotrophic oceanic regions. We found a nonlinear relationship between nanophytoplankton and total chl a, which is different from both pico-cells (a linear decrease) and micro-cells (a linear increase). By assessing the functional responses of the size-specific growth rates to nitrate concentrations, we found a higher nitrate-saturated maximal growth rate and a larger half-saturation constant for microphytoplankton, whereas nano-and picophytoplankton showed similar lower maximal rates and smaller half-saturation constants. There was also much higher grazing mortality of microphytoplankton in response to the increase in total chl a. These findings are important for understanding plankton dynamics and the associated biogeochemical fluxes in contrasting marine ecosystems, as well as for future size-structure modeling of the NSCS. |
| 学科主题 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Oceanography |
| 资助项目 | LTO |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17055]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 通讯作者 | qianli@scsio.ac.cn |
| 推荐引用方式 GB/T 7714 | Dong, Y,Li, QP,Liu, ZJ,et al. Size-dependent phytoplankton growth and grazing in the northern South China Sea[J]. MARINE ECOLOGY PROGRESS SERIES,2018,599:35-47. |
| APA | Dong, Y,Li, QP,Liu, ZJ,Wu, ZC,Zhou, WW,&qianli@scsio.ac.cn.(2018).Size-dependent phytoplankton growth and grazing in the northern South China Sea.MARINE ECOLOGY PROGRESS SERIES,599,35-47. |
| MLA | Dong, Y,et al."Size-dependent phytoplankton growth and grazing in the northern South China Sea".MARINE ECOLOGY PROGRESS SERIES 599(2018):35-47. |
入库方式： OAI收割
来源：南海海洋研究所
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