http://scholars.ntou.edu.tw/handle/123456789/4385
標題: | Influence of Kuroshio water on the annual copepod community structure in an estuary in the northwest Pacific Ocean | 作者: | Li-Chun Tseng Hsiao, Shih-Hui Sarkar, Santosh Kumar Bhattacharya, Bhaskar Deb Chen, Qing-Chao Hwang, Jiang-Shiou |
關鍵字: | DANSHUEI RIVER ESTUARY;PLANKTONIC COPEPODS;CHINA SEA;NORTHEASTERN TAIWAN;COASTAL WATERS;ASSEMBLAGES;ABUNDANCE;MONSOON;MARINE;STRATIFICATION | 公開日期: | 15-四月-2016 | 出版社: | PERGAMON-ELSEVIER SCIENCE LTD | 卷: | 118 | 起(迄)頁: | 165-176 | 來源出版物: | CONT SHELF RES | 摘要: | The influence of Kuroshio water on temporal distribution and copepod diversity was investigated in the Lanyang River estuary (LRE), the longest river in northeast Taiwan, to assess secondary productivity. Zooplankton samples were collected bimonthly from the surface waters (0-2 m) of the estuary during cruises in 2006. Hydrological parameters indicated that the water in the LRE was an admixture of the Lanyang River water and seawater. Among the different genera, 47 copepod species (including 10 species that were identified only to the generic level) belonging to 28 genera, 16 families, and 4 orders were identified. The abundance and proportion of copepods to the total zooplankton counts range from 0 to 3683.42 (304.9 +/- 692.7 individuals m(-3)) and from 0 to 100 (55.09 +/- 34.84%) respectively. The copepod community structure revealed a distinct seasonal succession and showed significant differences among the sampling cruises (p < 0.05, One-way ANOVA). The 5 most abundant species were Parvocalanus crassirostris (relative abundance [RA]: 50.93%), Pseudodiaptomus serricaudatus (RA: 16.85%), Euterpina acutifrons (RA: 7.34%), Cyclops vicinus (RA: 4.82%), and Microcyclops tricolor (RA: 3.15%). The abundance, species number, indices of richness, evenness, and copepod diversity varied significantly (p < 0.05, Oneway ANOVA) for all the cruises. Pearson correlation analysis results demonstrated that salinity was positively correlated with the copepod species number (r=0.637), total copepod abundance (r=0.456), and Shannon-Wiener diversity index (r=0.375) with a 1% level of significance. By contrast, the evenness index was negatively correlated with salinity (r= 0375, p=0.01), indicating that copepod diversity in the LRE was influenced mainly by seawater. The Kuroshio Current played a major role in transporting and distributing warm-water copepods to its affected area. Copepod species assemblages showed seasonal succession and varied drastically with tidal change. The latter registered high abundance, and the presence of the highest number of species was correlated with intruding seawater. (C) 2016 Elsevier Ltd. All rights reserved. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/4385 | ISSN: | 0278-4343 | DOI: | 10.1016/j.csr.2016.02.018 |
顯示於: | 海洋生物研究所 15 LIFE ON LAND |
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