Spatio-temporal distribution of net-collected phytoplankton community and its response to marine exploitation in Xiangshan Bay  

作　　者：江志兵 朱旭宇 高瑜 陈全震 曾江宁 朱根海 

机构地区：[1]State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,State Oceanic Administration [2]Laboratory of Marine Ecosystem Biogeochemistry,Second Institute of Oceanography,State Oceanic Administration

出　　处：《Chinese Journal of Oceanology and Limnology》2013年第4期762-773,共12页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Basic Research Program of China (973Program) (No.2010CB428903);the National Marine Public Welfare Research Project of China (Nos.201305043-3,201305009);the Natural Science Foundation of Zhejiang Province, China (No.Y5110131);the National Natural Science Foundation of China (Nos.41176142,41206103);the Funds for Key Innovative Team on Marine Aquaculture of Zhejiang Province, China (No.2010R50025)

摘　　要：To explore the spatial-temporal distribution of the phytoplankton community and evaluate the combined effects of marine resource exploitation, net-collected phytoplankton and physical-chemical parameters were investigated in the Xiangshan Bay during the four seasons of 2010. A total of eight phyla, 97 genera, and 310 species were found, including 232 diatom species, 45 dinoflageUate species and 33 other taxa. The phytoplankton abundances presented a significant （P〈0.001） seasonal difference with the average of 60.66x104 cells/m3. Diatoms （mainly consisting of Coscinodiscus jonesianus, Cerataulina pelagica, Skeletonema costatum, and genus Chaetoceros） dominated the phytoplankton assemblage in all seasons. We found great spatio-temporal variation in community composition based on the multidimensional scaling and similarity analysis. Canonical correspondence analysis show that temperature, nutrition, illumination, and salinity were the main variables associated with microalgal assemblage. Compared with the previous studies, an increase in phytoplankton abundance and change in the dominant species coincided with increased exploitation activities in this bay （e.g. operation of coastal power plants, intensive mariculture, tidal fiat reclamation, and industrial and agricultural development）. The present findings suggest that the government should exercise caution when deciding upon developmental patterns in the sea-related economy.To explore the spatial-temporal distribution of the phytoplankton community and evaluate the combined effects of marine resource exploitation, net-collected phytoplankton and physical-chemical parameters were investigated in the Xiangshan Bay during the four seasons of 2010. A total of eight phyla, 97 genera, and 310 species were found, including 232 diatom species, 45 dinoflagellate species and 33 other taxa. The phytoplankton abundances presented a significant (P<0.001) seasonal difference with the average of 60.66×10 4 cells/m 3 . Diatoms (mainly consisting of Coscinodiscus jonesianus, Cerataulina pelagica, Skeletonema costatum, and genus Chaetoceros) dominated the phytoplankton assemblage in all seasons. We found great spatio-temporal variation in community composition based on the multidimensional scaling and similarity analysis. Canonical correspondence analysis show that temperature, nutrition, illumination, and salinity were the main variables associated with microalgal assemblage. Compared with the previous studies, an increase in phytoplankton abundance and change in the dominant species coincided with increased exploitation activities in this bay (e.g. operation of coastal power plants, intensive mariculture, tidal flat reclamation, and industrial and agricultural development). The present findings suggest that the government should exercise caution when deciding upon developmental patterns in the sea-related economy.

关 键 词：EUTROPHICATION PHYTOPLANKTON thermal discharge Xiangshan Bay 

分 类 号：Q948.8[生物学—植物学]