| 摘要: |
| 研究了洋山港海域桡足类的周年生态特征。结果显示, 洋山港桡足类的优势种为四刺窄腹剑水蚤(Limnoithona tetraspina)、太平洋纺锤水蚤(Acartia pacifica)、真刺唇角水蚤(Labidocera euchaeta)、针刺拟哲水蚤(Paracalanus aculeatus)、双毛纺锤水蚤(Acartia bifilosa)、小毛猛水蚤(Microsetella norvegica)、瘦拟哲水蚤(Paracalanus gracilis)和小拟哲水蚤(Paracalanus parvus); 桡足类丰度季节变化显著(F=2.11, P<0.05), 春(28.44 个/L±19.16 个/L)>夏(18.60 个/L±14.81 个/L)>冬(10.98 个/L±3.65 个/L)>秋(10.57 个/L±4.45 个/L); 生物量则为夏(12359.1 mg/L±18438.1 mg/L)>秋(7796.6 mg/L±1348.6 mg/L)>冬(2944.8 mg/L±1680.9 mg/L)>春(1401.0 mg/L±1057.3 mg/L)。桡足类丰度的周年变化呈现双峰型特征,生物量变化呈现单峰型特征。多变量分析显示, 优势种的数量变化对洋山港桡足类群落丰度和生物量的季节变化起主要作用。小洋山码头受人类干扰严重, 桡足类丰度和多样性与大洋山码头已出现差异,春、冬季小洋山码头的多样性指数(H′)高于大洋山码头, 除秋季外, 小洋山码头的均匀度指数(J)都高于大洋山码头。 |
| 关键词: 洋山港 桡足类 优势种 丰度 周年变化 |
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| 基金项目:上海市科委海洋科技专项(10dz1210900); 上海市教委重点学科建设项目(J50701) |
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| Annual variation of copepod community in the Yangshan Port |
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| Abstract: |
| To understand the annual variation of the copepod community structure, abundance, dominant species and diversity in the Yangshan Port, samples were collected monthly from March 2009 to February 2010. The results showed that the dominant species were Limnoithona tetraspina, Acartia pacifica, Labidocera euchaeta, Paracalanus aculeatus, Acartia bifilosa, Microsetella norvegica, Paracalanus gracilis and Paracalanus parvus. The seasonal variation in the mean abundance was remarkable(F=2.11, P<0.05), and the order from high to low was spring (28.44 ind/L±19.16 ind/L), summer (18.60 ind/L±14.81 ind/L), winter (10.98 ind/L±3.65 ind/L), and autumn (10.57 ind/L±4.45 ind/L). The order of biomass from high to low was summer (12359.1 mg/L±18438.1 mg/L), autumn (7796.6 mg/L±1348.6 mg/L), winter (2944.8 mg/L±1680.9 mg/L), and spring (1401.0 mg/L±1057.3 mg/L). The copepod abundance showed single peak in one year, and the copepod biomass showed double peaks in one year. The results of multivariate analysis showed that the variation of dominant species made a great contribution to the variation of copepod community. Xiaoyang was the main shipping docks with bigger ship flux than Dayang. The copepod community had already showed difference between Dayang and Xiaoyang. The Shannon Weaver index of Xiaoyang was higher than that of Dayang both in spring and winter. But the Pielou index of Xiaoyang was higher than Dayang in spring, summer and winter. |
| Key words: Yangshan Port copepod dominant abundance annual variation |
