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2013-Spatio-temporal distribution of net-collected phytoplankton community - xiangshan bay.pdf

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2013-Spatio-temporal distribution of net-collected phytoplankton community - xiangshan bay

Chinese Journal of Oceanology and Limnology Vol. 31 No. 4, P. 762-773, 2013 /10.1007/s00343-013-2206-z Spatio-temporal distribution of net-collected phytoplankton community and its response to marine exploitation in Xiangshan Bay* JIANG Zhibing (江志兵) 1, 2 , ZHU Xuyu (朱旭宇) 1 , GAO Yu (高瑜) 1 , CHEN Quanzhen (陈全震) 1 , ZENG Jiangning (曾江宁) 1, 2 , ** , ZHU Genhai (朱根海) 1 1 State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China 2 Laboratory of Marine Ecosystem Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China Received Sep. 11, 2012; accepted in principle Oct. 29, 2012; accepted for publication Feb. 4, 2013 ? Chinese Society for Oceanology and Limnology, Science Press, and Springer-Verlag Berlin Heidelberg 2013 Abstract 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 dinofl agellate species and 33 other taxa. The phytoplankton abundances presented a signifi cant ( P 0.001) seasonal difference with the average of 60.66×10 4 cells/m 3 . Diatoms (mainly consisting of Coscinodiscus jonesianus , Cerataulina pelagica , Skeleto n ema 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 abunda