Size-dependent phytoplankton growth and grazing in the northern South China Sea
Dong, Y; Li, QP; Liu, ZJ; Wu, ZC; Zhou, WW; qianli@scsio.ac.cn
2018
发表期刊MARINE ECOLOGY PROGRESS SERIES
卷号599页码:35-47
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.
部门归属[Dong, Yuan; Li, Qian P.; Liu, Zijia; Wu, Zhengchao; Zhou, Weiwen] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Li, Qian P.; Liu, Zijia; Zhou, Weiwen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
关键词Size-fractionated Chlorophyll Size-specific Phytoplankton Growth Microzooplankton Grazing South China Sea
学科领域Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Oceanography
资助项目LTO
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/17055
专题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.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。