Diatom communities in equatorial region and its adjacent areas of eastern Indian Ocean during spring intermonsoon 2014

Xue Bing; Sun Jun; Ding Changling; Wang Dongxiao

doi:10.3969/j.issn.0253-4193.2016.02.011

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Xue Bing, Sun Jun, Ding Changling, Wang Dongxiao. Diatom communities in equatorial region and its adjacent areas of eastern Indian Ocean during spring intermonsoon 2014[J]. Haiyang Xuebao, 2016, 38(2): 112-120. doi: 10.3969/j.issn.0253-4193.2016.02.011

Citation:

Xue Bing, Sun Jun, Ding Changling, Wang Dongxiao. Diatom communities in equatorial region and its adjacent areas of eastern Indian Ocean during spring intermonsoon 2014[J]. Haiyang Xuebao, 2016, 38(2): 112-120. doi: 10.3969/j.issn.0253-4193.2016.02.011

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Diatom communities in equatorial region and its adjacent areas of eastern Indian Ocean during spring intermonsoon 2014

doi: 10.3969/j.issn.0253-4193.2016.02.011

1.
College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China;Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, China
2.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

Received Date: 2015-04-20
Rev Recd Date: 2015-09-27

Abstract

Abstract

Phytoplankton net samples were collected from 45 grid stations (10.08°N-6.00°S, 80.00°-96.10°E) from April 10 to May 13, 2014 in eastern Indian Ocean, diatoms including 34 genera and 113 species (including variety, form and unidentified taxa) were found in the survey area. Over half species were tropical oceanic species and warm oceanic species, which was in line with the tropical and subtropical environmental characteristics in the survey area. The dominant species included Climacodium frauenfeldianum, Leptocylindrus mediterraneus, Chaetoceros coarctatus, Planktoniella foromsa, Chaetoceros atlanticus var. neapolitanus, Pseudosolenia calcar-avis, Guinardia cylindrus, Chaetoceros dadayi, Thalassionema frauenfeldii, Thalassiosira excentrica, Chaetoceros bacteriastroides, Rhizosolenia styliformis var. latissima. The average cell abundance of diatoms was 1.855×10³ cells/m³. The horizontal distribution of diatoms was asymmetrical, the cell abundance was low in the equatorial section, and the northern area was the high abundance zone. Seven groups were divided through the cluster analysis, the species composition and horizontal distribution of diatoms had a good correlation with the integrated average temperature, salinity and nutrients above 200 m.
- diatoms,
- eastern Indian Ocean,
- species composition,
- horizontal distribution,
- cluster analysis

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