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 LIN Gengming,XIANG Peng,YANG Qingliang,et al.Phytoplankton Community Succession and Its Relation to Abiotic Parameters During Blooming Period in Xiamen Sea, China[J].Chinese Journal of Applied & Environmental Biology,2013,19(01):126-133.[doi:10.3724/SP.J.1145.2013.00126]





Phytoplankton Community Succession and Its Relation to Abiotic Parameters During Blooming Period in Xiamen Sea, China
(国家海洋局第三海洋研究所 厦门 361005)
LIN GengmingXIANG PengYANG QingliangLIN WeihanWANG Yu
(Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China)
phytoplankton community succession blooming mechanism multivariate analysis Xiamen Sea
Q178.53 : X55
2000年6-7月在厦门海域11个测站进行赤潮监测,6月28-29日在西海域发生聚生角毛(Chaetoceros socialis)和金藻(Chromulina sp.)水华. 根据表层浮游植物样品和同步观测的理化参数进行多元分析,揭示浮游植物群落演替和水华机理. 聚类分析显示浮游植物聚群可分为与水华过程相关联的3个群落,群落Ⅰ位于半封闭性的水交换条件差的西海域,主要由微型浮游植物组成,这些赤潮原因种在赤潮爆发时剧增. 群落Ⅱ位于受九龙江冲淡水影响较直接的外港,主要由低盐的小型浮游植物组成. 群落Ⅲ位于受外海水影响较大的东北部,主要由广布性的小型浮游植物组成;主成分分析表明浮游植物细胞丰度与营养盐尤其铵氮含量密切相关;西海域样品因子载荷较大指示该海域富营养化程度比外港和东部海域严重. 降雨是这次水华的激发因素,由其引起的降温抑制暖温性中肋骨条藻繁殖,促进寒冷性聚生角毛藻旺发;然而降雨带来的有机污染是水华的内在原因. 此外,本文还讨论了浮游植物水华优势种小型化与营养盐结构的关系.
Red-tide routine monitoring was carried out at 11 stations in Xiamen Sea from June to July, 2000. During the investigation, the Chaetoceros socialis and Chromulina sp. bloom occurred in the western water from June 28th to 29th. Multivariate statistical analysis on the phytoplankton water samples from surface water and simultaneously physic-chemical parameters revealed the community succession and blooming mechanism of phytoplankton during the bloom event. Cluster Analysis showed that the phytoplankton assemblage could be classified into 3 communities associated with the specific stages of the bloom. Community I, which was composed of nano-phytoplankton and multiplied rapidly during the bloom, was located in the enclosed western water with low water exchange. Community II, which was composed of micro-phytoplankton, was located in the outer harbor influenced by the brackish water from Jiulong River. Community III, mostly composed of cosmopolitan phytoplankton, was located in the eastern water close to the open sea. Principal Component Analysis (PCA) showed a positive relationship between phytoplankton cell abundance and nutrient concentration, especially that of NH3-N. The high factor loading scores from western water indicated that eutrophication situation in this area was more serious than that of the outer harbor and the eastern water. The rainfall was considered to be a key trigger of the bloom, which led to a sharp drop in temperature, and might be adverse to the growth of warm-temperate species Skeletonema costatum whilst favoring the growth of boreal species Chaetoceros socialis. Nevertheless, organic pollution due to the rainfalls with nutrient-rich freshwater was the intrinsic cause of the bloom. Furthermore, the miniaturization of the bloom species may be related to phosphorus deficiency and the higher ratio of NH3-N to TIN.


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Supported by the Commonweal Project of the Ministry of Science and Technology of China (No. 200905009) and the Important Project of Science & Technology of Fujian Province (No. 2009N0037)
更新日期/Last Update: 2013-02-26