| 2017年春季季风间期南海中北部浮游植物生长与微型浮游动物摄食 |
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| 引用本文： | 陈大伟,郭聪聪,余凌晖,鲁远征,孙军.2017年春季季风间期南海中北部浮游植物生长与微型浮游动物摄食[J].海洋学报(英文版),2020,39(6):84-95. |
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| 作者姓名： | 陈大伟 郭聪聪 余凌晖 鲁远征 孙军 |
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| 作者单位： | 天津科技大学 天津市海洋资源与化学重点实验室, 天津 300457;天津科技大学 印度洋生态系统研究中心, 天津 300457;热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东 广州 510301 |
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| 基金项目： | The National Key Research and Development Program of China under contract No. 2019YFC1407805; the National Natural Science Foundation of China under contract Nos 41876134 and 41676112; the University Innovation Team Training Program for Tianjin under contract No. TD12-5003; the Tianjin 131 Innovation Team Program under contract No. 20180314; the Changjiang Scholar Program of Chinese Ministry of Education to Jun Sun under contract No. T2014253. |
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| 摘 要： | Phytoplankton growth rates and mortality rates were experimentally examined at 21 stations during the 2017 spring intermonsoon(April to early May) in the northern and central South China Sea(SCS) using the dilution technique, with emphasis on a comparison between the northern and central SCS areas which had different environmental factors. There had been higher temperature but lower nutrients and chlorophyll a concentrations in the central SCS than those in the northern SCS. The mean rates of phytoplankton growth(μ_0) and microzooplankton grazing(m) were(0.88±0.33) d~(–1) and(0.55±0.22) d~(–1) in the central SCS, and both higher than those in the northern SCS with the values of μ_0((0.81±0.16) d~(–1)) and m((0.30±0.09) d~(–1)), respectively.Phytoplankton growth and microzooplankton grazing rates were significantly coupled in both areas. The microzooplankton grazing impact(m/μ_0) on phytoplankton was also higher in the central SCS(0.63±0.12) than that in the northern SCS(0.37±0.06). The microzooplankton abundance was significantly correlated with temperature in the surface. Temperature might more effectively promote the microzooplankton grazing rate than phytoplankton growth rate, which might contribute to higher m and m/μ_0 in the central SCS. Compared with temperature, nutrients mainly affected the growth rate of phytoplankton. In the nutrient enrichment treatment,the phytoplankton growth rate(μn) was higher than μ_0 in the central SCS, suggesting phytoplankton growth in the central SCS was nutrient limited. The ratio of μ_0/μn was significantly correlated with nutrients concentrations in the both areas, indicating the limitation of nutrients was related to the concentrations of background nutrients in the study stations.
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| 关 键 词： | 稀释法 浮游植物生长 微型浮游动物摄食 南海 春季季风间期 |
| 收稿时间： | 2019/5/15 0:00:00 |
Phytoplankton growth and microzooplankton grazing in the central and northern South China Sea in the spring intermonsoon season of 2017 |
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| Chen Dawei,Guo Congcong,Yu Linhui,Lu Yuanzhen,Sun Jun.Phytoplankton growth and microzooplankton grazing in the central and northern South China Sea in the spring intermonsoon season of 2017[J].Acta Oceanologica Sinica,2020,39(6):84-95. |
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| Authors: | Chen Dawei Guo Congcong Yu Linhui Lu Yuanzhen Sun Jun |
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| Institution: | 1.Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, China2.Research Centre for Indian Ocean Ecosystem, Tianjin University of Science and Technology, Tianjin 300457, China3.State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | Phytoplankton growth rates and mortality rates were experimentally examined at 21 stations during the 2017 spring intermonsoon (April to early May) in the northern and central South China Sea (SCS) using the dilution technique, with emphasis on a comparison between the northern and central SCS areas which had different environmental factors. There had been higher temperature but lower nutrients and chlorophyll a concentrations in the central SCS than those in the northern SCS. The mean rates of phytoplankton growth (μ0) and microzooplankton grazing (m) were (0.88±0.33) d–1 and (0.55±0.22) d–1 in the central SCS, and both higher than those in the northern SCS with the values of μ0 ((0.81±0.16) d–1) and m ((0.30±0.09) d–1), respectively. Phytoplankton growth and microzooplankton grazing rates were significantly coupled in both areas. The microzooplankton grazing impact (m/μ0) on phytoplankton was also higher in the central SCS (0.63±0.12) than that in the northern SCS (0.37±0.06). The microzooplankton abundance was significantly correlated with temperature in the surface. Temperature might more effectively promote the microzooplankton grazing rate than phytoplankton growth rate, which might contribute to higher m and m/μ0 in the central SCS. Compared with temperature, nutrients mainly affected the growth rate of phytoplankton. In the nutrient enrichment treatment, the phytoplankton growth rate (μn) was higher than μ0 in the central SCS, suggesting phytoplankton growth in the central SCS was nutrient limited. The ratio of μ0/μn was significantly correlated with nutrients concentrations in the both areas, indicating the limitation of nutrients was related to the concentrations of background nutrients in the study stations. |
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| Keywords: | dilution technique phytoplankton growth microzooplankton grazing South China Sea spring intermonsoon season |
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