Quick Search:       Advanced Search
Chen Dawei,Guo Congcong,Yu Linhui,Lu Yuanzhen,Sun Jun. 2020. Phytoplankton growth and microzooplankton grazing in the central and northern South China Sea in the spring intermonsoon season of 2017. Acta Oceanologica Sinica, 39(6):84-95
Phytoplankton growth and microzooplankton grazing in the central and northern South China Sea in the spring intermonsoon season of 2017
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
Received:May 15, 2019  
DOI:10.1007/s13131-020-1593-1
Key words:dilution technique  phytoplankton growth  microzooplankton grazing  South China Sea  spring intermonsoon season
中文关键词:  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
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.
Author NameAffiliationE-mail
Chen Dawei Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, China
Research Centre for Indian Ocean Ecosystem, Tianjin University of Science and Technology, Tianjin 300457, China
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China 
 
Guo Congcong Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, China
Research Centre for Indian Ocean Ecosystem, Tianjin University of Science and Technology, Tianjin 300457, China 
 
Yu Linhui State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China  
Lu Yuanzhen State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China  
Sun Jun Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, China
Research Centre for Indian Ocean Ecosystem, Tianjin University of Science and Technology, Tianjin 300457, China 
phytoplankton@163.com 
Hits: 456
Download times: 391
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.
中文摘要:
      在2017年春季季风间期(4月到5月初),对南海北部和中部的21个站位利用稀释法进行了浮游植物生长和微型浮游动物摄食的研究,重点比较了具有不同环境变量的南海北部和中部海域的差异性。南海北部比南海中部具有较低的温度,较高的营养盐和叶绿素a浓度。在南海中部,平均的浮游植物生长率(μ0)和微型浮游动物摄食率(m)为0.88±0.33 d-1和0.55±0.22 d-1,均高于北部的生长率(0.81±0.16 d-1)和摄食率(0.30±0.09 d-1),且在两个海域,生长率和摄食率之间均表现明显的相关性。微型浮游动物对浮游植物的摄食压力(m/μ0)在南海中部(0.63±0.12)也明显高于南海北部(0.37±0.06)。在表层,微型浮游动物丰度和温度明显相关。相比较于浮游植物生长率,温度对微型浮游动物摄食率的促进更加明显,这有可能是导致南海中部具有更高的摄食率和摄食压力的原因。而营养盐主要影响浮游植物的生长率,在南海中部,营养盐加富条件下的浮游植物生长率(μn)要明显高于对照组μ0,表明南海中部的浮游植物生长受到明显的营养盐限制。另外,比值(μ0/μn)和两个海域环境营养盐浓度显著相关,说明营养盐限制与研究站位的本底营养盐浓度有关。
HTML View Full Text   View/Add Comment  Download reader
Close