2014年春季季风间期东印度洋赤道及其邻近海域硅藻群落

薛冰; 孙军; 丁昌玲; 王东晓

doi:10.3969/j.issn.0253-4193.2016.02.011

2014年春季季风间期东印度洋赤道及其邻近海域硅藻群落

doi: 10.3969/j.issn.0253-4193.2016.02.011

1.
天津科技大学海洋与环境学院, 天津 300457;天津科技大学天津市海洋资源与化学重点实验室, 天津 300457
2.
中国科学院南海海洋研究所热带海洋环境国家重点实验室, 广东广州 510301

基金项目: 国家自然科学基金(41276124,41176136,41406155);教育部新世纪优秀人才计划(NCET-12-1065);天津市高校创新团队计划(TD12-5003)。

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出版历程
- 收稿日期: 2015-04-20
- 修回日期: 2015-09-27

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

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

摘要

摘要: 2014年4月10日至5月13日在东印度洋赤道区及其邻近海域(10.08°N-6.00°S,80.00°~96.10°E)进行硅藻物种组成和群落结构的调查。分析了45个网采样品,共鉴定出浮游硅藻34属113种(包括变种、变形及未定名种),大部分物种为热带外洋性种以及暖海外洋性种,与该海区的热带及亚热带的环境特征一致。优势种为佛氏梯形藻(Climacodium frauenfeldianum)、地中海细柱藻(Leptocylindrus mediterraneus)、密聚角毛藻(Chaetoceros coarctatus)、美丽漂流藻(Planktoniella foromsa)、大西洋角毛藻那不勒斯变种(Chaetoceros atlanticus var. neapolitanus)、距端假管藻(Pseudosolenia calcar-avis,即距端根管藻Rhizosolenia calcaravis)、圆柱几内亚藻(Guinardia cylindrus)、达蒂角毛藻(Chaetoceros dadayi)、伏氏海线藻(Thalassionema frauenfeldii)、离心列海链藻(Thalassiosira excentrica)、瘤面角毛藻(Chaetoceros bacteriastroides)以及笔尖根管藻粗径变种(Rhizosolenia styliformis var. latissima)等。硅藻的平均细胞丰度为1.855×10³个/m³,其平面分布不均匀,赤道断面细胞丰度较低,高值区出现在海区北部。聚类分析发现有7种生态类群,这些硅藻的种类和丰度平面分布与上层水体(200 m以浅)温度、盐度及营养盐的水柱平均值有较好的对应关系。
- 硅藻 /
- 东印度洋 /
- 种类组成 /
- 平面分布 /
- 聚类分析
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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