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首页> 外文期刊>Ecotoxicology >Planktonic community structure during a harmful bloom of Phaeocystis globosa in a subtropical bay, with special reference to the ciliate assemblages
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Planktonic community structure during a harmful bloom of Phaeocystis globosa in a subtropical bay, with special reference to the ciliate assemblages

机译：亚热带海湾球藻Phaeocystis globosa有害开花期间的浮游生物群落结构，特别涉及纤毛虫组合

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摘要

Planktonic community structure was investigated during outbreak of harmful Phaeocystis globosa bloom in a subtropical bay, the Maowei Sea, South China Sea. The phytoplankton assemblage was numerically dominated by colonial P. globosa, with its abundance ranging from 1.23 x 10(8) to 11.12 x 10(8) cells m(-3) and contributing nearly 90 % to the total abundance. Totally 66 mesozooplankton (>169 mu m) and 19 ciliates species were recorded, with the densities ranged from 169 to 1633 ind m(-3) and 74 to 1118 cells L-1, respectively. The dominant species for mesozooplankton were Copepoda (larvae), Bestiola sinicus, B. atnoyensis, Macrura (larvae) and Acartia spinicauda, respectively. The ciliate assemblage was numerically dominated by Codonella rapa, Strombidium globosaneutn and Mesodiniutn rubrutn. During the bloom, P. globosa seemed to be negatively affected by the nutrient phosphate significantly (p < 0.05). However, no correlation between P. globosa and ciliate assemblage was detected, but P. globosa was negatively correlated with total biomass of mesozooplankton and abundance of B. sinicus (p < 0.05), suggesting that P. globosa was uncoupled from the grazing by both ciliates and mesozooplankton when appearing as colonies form. On the other hand, both positive and negative correlations among the dominant groups of mesozooplankton and ciliates were observed (p < 0.05) which possibly indicated that the predation of mesozooplankton upon ciliates might be strengthened during the Phaeocystis bloom and the complex effect also varied from species to species.
机译：在南海毛威海亚热带海湾有害藻球藻暴发期间，对浮游生物群落结构进行了调查。浮游植物的组合在数量上由殖民地的P. globosa主导，其丰度范围为1.23 x 10（8）至11.12 x 10（8）个细胞m（-3），占总丰度的近90％。总共记录了66种中层浮游生物（> 169微米）和19种纤毛虫，密度分别为169至1633 ind m（-3）和74至1118个L-1细胞。中型浮游动物的优势种分别为Co足类（Copepoda），中华贝斯特拉（Bestiola sinicus），B.atnoyensis，Macrura（幼虫）和A螨（Acartia spinicauda）。纤毛虫的组合在数量上主要由拉美冬孢子虫（Codonella rapa），球形链霉菌（Strombidium globosaneutn）和红腹藻（Mesodiniutn rubrutn）主导。在开花期间，P。globosa似乎受到营养磷酸盐的负面影响（p <0.05）。然而，没有发现球形假单胞菌和纤毛虫组合之间的相关性，但是球形假单胞菌与中生浮游生物的总生物量和中华假单胞菌的丰度呈负相关（p <0.05），这表明球形假单胞菌与放牧不与放牧耦合菌落和中型浮游生物以菌落形式出现时。另一方面，观察到中游浮游动物和纤毛虫的优势群之间的正相关和负相关性（p <0.05），这可能表明，在藻囊藻开花期间，中游浮游动物对纤毛虫的捕食可能会增强，并且复杂效应也因物种而异。种。

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