Community structure of siphonophores in the tropical northeast Indian Ocean

Li Kaizhi; Ke Zhixin; Li Gang; Yin Jianqiang; Huang Liangmin

doi:10.3969/j.issn.0253-4193.2014.08.008

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Li Kaizhi, Ke Zhixin, Li Gang, Yin Jianqiang, Huang Liangmin. Community structure of siphonophores in the tropical northeast Indian Ocean[J]. Haiyang Xuebao, 2014, 36(8): 72-81. doi: 10.3969/j.issn.0253-4193.2014.08.008

Citation:

Li Kaizhi, Ke Zhixin, Li Gang, Yin Jianqiang, Huang Liangmin. Community structure of siphonophores in the tropical northeast Indian Ocean[J]. Haiyang Xuebao, 2014, 36(8): 72-81. doi: 10.3969/j.issn.0253-4193.2014.08.008

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Community structure of siphonophores in the tropical northeast Indian Ocean

doi: 10.3969/j.issn.0253-4193.2014.08.008

Key Laboratory of Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

Received Date: 2013-09-16
Rev Recd Date: 2014-01-20

Abstract

Abstract

Siphonophores,the major constituent of the zooplankton community,are a widespread and abundant group of colonial gelatinous cnidarians that play important roles in the trophic web of the pelagic realm. It has been observed that some species of siphonophores could be used as indicators to certain types of waters and ocean current in a particular region. The distribution of siphonophores is influenced by hydrological and biological process,such as temperature,salinity and chlorophyll a concentration. This study aimed to examine the species composition,abundance distribution and community structure of siphonophore based on the data obtained from the tropical northeast Indian Ocean in April to May,2011. A total of 37 species of siphonophore were identified characterized by the ecological groups with tropical widespread and equator species. The dominant species were mainly represented by Chelophyes contorta,Bassia bassensis,Nanomia bijuga and Abylopsis eschscholtzi. The study area could be divided into three transects: eastern,equator and western transects based on the sampling stations and environmental condition. The range of species richness was from 2 to 14,with the high diversity at eastern and western transects,and the increasing trend from the nearshore to offshore at equator transect. An average of siphonophore abundance was (1.04±0.58) ind/m³,with an uneven distribution characterized by high values at eastern and western transects and low values at equator transect. The similarity percentage of community structure between the eastern and western transects was high than equator transect. The results suggested that the distribution of siphonophore was considered to be the result of physical and biological factors. Nanomia bijuga could be regarded as an indicator species for coastal waters at eastern transect,and Lensia conoides & Rosacea plicata for uplifted cold waters in the western transect.
- zooplankton,
- siphonophore,
- diversity,
- abundance,
- Indian Ocean

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