| SHEN Linnan,GAO Aiguo,LI Chao,CHEN Min. 2017. Diatom distribution and its relationship to sediment property in the Minjiang Estuary, southeast China. Acta Oceanologica Sinica, 36(10):20－30 |
| Diatom distribution and its relationship to sediment property in the Minjiang Estuary, southeast China |
| 闽江口沉积硅藻分布特征及其沉积意义 |
| Received:June 28, 2016 |
| DOI：10.1007/s13131-017-1070-7 |
| Key words:diatom surface sediment Minjiang Estuary canonical correspondence analysis sediment properties |
| 中文关键词: 硅藻 表层沉积物 闽江口 CCA 沉积物性质 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | SHEN Linnan | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
Geology Laboratory of Marine and Coastal, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China | | | GAO Aiguo | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | | | LI Chao | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | lichao@xmu.edu.cn | | CHEN Min | Geology Laboratory of Marine and Coastal, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China | |
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| Abstract: |
| The distribution of diatoms in surface sediments in the Minjiang Estuary, southeast China, was investigated in 2009. Total 56 species and other species belonging to 25 genera were identified, among them 11 species were dominant over 5%. Dominant species included Actinocyclus ehrenbergii, Coscinodiscus curvatulus, C. divisus, C. jonesianus, C. radiatus, C. rothii, C. subtilis, Cyclotella stylorum, Epithemia hyndmanii, Hydrosera whampoensis, and Trachyneis aspera. Diatom abundance varied spatially, with the absolute abundance of diatoms ranging from 13 valves/g to 11×104 valves/g, and averaging 2.5×104 valves/g. A canonical correspondence analysis (CCA) was used to explain the relationships between diatom distribution and sediment properties in the Minjiang Estuary. CCA revealed that the major elements (Fe2O3, Na2O, CaO, MgO, TiO2, SiO2, Al2O3, and K2O) were closely related to diatom abundance. Four diatom assemblages were distinguished, representing different sediment properties, which may assist late Quaternary palaeoceanographic reconstructions of the Minjiang Estuary. |
| 中文摘要: |
| 本文对闽江口表层沉积硅藻进行分析，共鉴定出硅藻56个种和变种，隶属于25个属，其中有11个优势种相对百分含量大于5%。主要优势种有爱氏辐环藻、弓束圆筛藻、多束圆筛藻、琼氏圆筛藻、辐射圆筛藻、洛氏圆筛藻、细弱圆筛藻、柱状小环藻、海氏窗纹藻、黄埔水链藻和粗纹藻。硅藻丰度变化大，从13粒/克到11×104粒/克，平均丰度为2.5×104粒/克。通过CCA分析闽江口表层沉积硅藻与环境因子之间的关系表明，常量元素与硅藻有着明显的相关性，四个硅藻组合带代表不同的沉积特性，能应用于重建闽江口晚第四纪以来古海洋变化。 |
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