| 白令海夏季浮游植物的群落结构与时空变化 |
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| 引用本文： | 王雨,项鹏,叶又茵,林更铭,杨清良,林和山,林茂.白令海夏季浮游植物的群落结构与时空变化[J].海洋学报(英文版),2016,35(4):99-107. |
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| 作者姓名： | 王雨 项鹏 叶又茵 林更铭 杨清良 林和山 林茂 |
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| 作者单位： | 国家海洋局第三海洋研究所, 福建 厦门 361005,国家海洋局第三海洋研究所, 福建 厦门 361005,国家海洋局第三海洋研究所, 福建 厦门 361005,国家海洋局第三海洋研究所, 福建 厦门 361005,国家海洋局第三海洋研究所, 福建 厦门 361005,国家海洋局第三海洋研究所, 福建 厦门 361005,国家海洋局第三海洋研究所, 福建 厦门 361005 |
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| 基金项目： | The National Natural Science Foundation of China under contract Nos 41306116 and 41506217; the Basic Research of the National Department of Science and Technology under contract No.GASI-01-02-04; the Polar Science Strategic Research Foundation of China under contract No.20140309. |
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| 摘 要： | 通过1999年和2010年夏季同期7月在白令海(169°E~166°W,50°N~67°N)获取的94份浮游植物样品分析,获得了近十年的始末两个时间节点的浮游植物群落结构与时空变化,探讨了浮游植物群落动态及其与环境因素的关联。研究结果显示,共鉴定浮游植物(>10μm)5门58属153种,分为3个生态类群。硅藻是浮游植物的主体,种类多丰度高,占总种类数目的66.7%,占总丰度的95.2%。鉴于样品属性和空间范围的不同,物种组成有细微差别,丰度有较大差异且空间分布明显不同,高丰度区受控于上层营养盐供给和表层环流系统。优势种从北方温带大洋性硅藻演变为广温广盐性与冷水性硅藻,1999年以西氏新细齿状藻为第一优势种,柔弱伪菱形藻次之;2010年以丹麦细柱藻为第一优势种,冷水性的诺登海链藻次之并在陆架和陆坡占优。浮游植物群落结构较为稳定,由深水群落和浅水群落组成。深水群落分布于太平洋西北部和白令海盆,种类组成以温带大洋性的西氏新细齿状藻、长海毛藻、大西洋角毛藻和广布性的菱形海线藻、扁面角毛藻、笔尖根管藻为主,丰度低,种间丰度分配均匀,优势种多元化,物种多样性高;浅水群落分布于白令海陆坡和陆架,主要由冷水性的诺登海链藻、叉尖角毛藻、聚生角毛藻和广布性的丹麦细柱藻、旋链角毛藻组成,丰度高,种间丰度分配不均匀,优势种突出,物种多样性低。白令海夏季浮游植物种类组成及丰度变化直接受控于表层环流、营养盐、春季冰缘线等环境因素。
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| 关 键 词： | 白令海 浮游植物 群落结构 时空变化 分布 环境变迁 |
| 收稿时间： | 2014/9/25 0:00:00 |
| 修稿时间： | 8/7/2015 12:00:00 AM |
Community structure and spatial-temporal variation of netz-phytoplankton in the Bering Sea in summer |
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| WANG Yu,XIANG Peng,YE Youyin,LIN Gengming,YANG Qingliang,LIN Heshan and LIN Mao.Community structure and spatial-temporal variation of netz-phytoplankton in the Bering Sea in summer[J].Acta Oceanologica Sinica,2016,35(4):99-107. |
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| Authors: | WANG Yu XIANG Peng YE Youyin LIN Gengming YANG Qingliang LIN Heshan and LIN Mao |
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| Institution: | Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China |
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| Abstract: | Marine biodiversity is changing in response to altered physical environment, subsequent ecological changes as well as anthropogenic disturbances. In this study, phytoplankton samples in situ collected in the Bering Sea in July of 1999 and 2010 were analyzed to obtain phytoplankton community structure and spatial-temporal variation between the beginning and end of this decade, and the correlation of phytoplankton community dynamics and environmental factors was investigated. A total of 5 divisions, 58 genera and 153 species of phytoplankton belonging to 3 ecological groups were identified. The vast majority of phytoplankton consisted of diatoms accounting for 66.7% of the total species and 95.2% of the total abundance. Considering differentiation in spatial extent and phytoplankton sample types, there were subtle changes in species composition, large altering in abundance and significant variation in spatial distribution between two surveys. The abundance peak area was located at the Bering Strait while sub peak was found at the Bering Sea Basin. The boreal-temperate diatom was the dominant flora, which was subsequently replaced by eurythermal and frigid-water diatom. Phytoplankton community in the Bering Sea was not a simplex uniform community but composed of deep-ocean assemblage and neritic assemblage. The deep-ocean assemblage was located in the northwestern Pacific Ocean and Bering Sea Basin, dominated by boreal-temperate species(Neodenticula seminae, Thalassiothrix longissima, Amphiprora hyperborean, Chaetoceros atlanticus, Thalassiosira trifulta, etc.) and eurychoric species(Thalassionema nitzschioides, Ch. compressus, Rhizosolenia styliformis, etc.), and characterized by low abundance, even inter-species abundance allocations, diverse dominant species and high species diversity. The neritic assemblage was distributed on the continental shelf and slope of Bering Sea and was mainly composed of frigid-water species(Th. nordenskiöldii, Ch. furcellatus, Ch. socialis, Bacteriosira fragilis, etc.) and eurythermal and euryhaline species(L. danicus, Ch. curvisetus, Coscinodiscus curvatulus, etc.), and it was characterized by high abundance, uneven inter-species allocations, prominent dominant species and low species diversity. Spatial-temporal variation of species composition and abundance of phytoplankton in the Bering Sea was directly controlled by surface circulation, nutrient supply and ice edge. |
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| Keywords: | Bering Sea phytoplankton community structure spatial and temporal variation distribution environment changes |
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