我国典型潮间带底栖硅藻群落空间分布特征

徐帅帅; 邸宝平; 王玉珏; 刘东艳; 王小冬

doi:10.3969/j.issn.0253-4193.2017.06.010

我国典型潮间带底栖硅藻群落空间分布特征

doi: 10.3969/j.issn.0253-4193.2017.06.010

1.
暨南大学赤潮与海洋生物学研究中心, 广东广州 510632;中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室, 山东烟台 264003
2.
中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室, 山东烟台 264003
3.
中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室, 山东烟台 264003;华东师范大学河口海岸国家重点实验室, 上海 200062
4.
暨南大学赤潮与海洋生物学研究中心, 广东广州 510632

基金项目: 科技基础性工作专项（2014FY210600）；国家自然科学基金（41376121）；山东省自然科学基金杰出青年基金项目（JQ201414）。

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出版历程
- 收稿日期: 2016-10-26
- 修回日期: 2017-02-19

Spatial distribution of benthic diatom in the typical intertidal zones in China

1.
Research Center for Harmful Algae and Marine Biology, Ji'nan University, Guangzhou 510632, China;Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
2.
Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
3.
Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;State Key Lab of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
4.
Research Center for Harmful Algae and Marine Biology, Ji'nan University, Guangzhou 510632, China

摘要

摘要: 底栖硅藻是河口、泥质海滩生态系统的重要生物类群，其数量与分布变化直接或间接地影响到多种海洋生物的饵料供给、海鸟的生存与迁徙。通过对我国从南到北14个典型潮间带表层沉积物中底栖硅藻的分析，共鉴定出硅藻153种，其物种多样性（Shannon-Weaver 指数范围：1.61~4.39）与生物量（范围：0.09×10³~ 10×10³个/g，干质量）在空间上存在显著差异；聚类分析与相似性分析检验（r=0.738，P=0.1%< 0.01）表明，14个调查区域的硅藻群落在空间上可分为4个大的组合，分别对应着渤、黄、东、南海4个区域，吻合了我国近海浮游植物的地理分布特征。与环境因素的相关性分析表明，底栖硅藻群落的物种多样性与生物量受沉积物类型与盐度的影响显著，泥质区域更有利于硅藻的保存，而生物多样性在泥砂质低盐区域相对较高。此外，底栖硅藻生物量与表层沉积物中TOC含量表现出显著正相关性；δ¹³C数值的空间变化范围为-25‰~-20‰，指示了有机质陆海混合的特征，其中，涧河河口、黄河口、大沽河口、苏北浅滩区域，δ¹³C数值明显偏正，表明底栖硅藻可能是这些区域沉积物中有机碳的重要贡献者。
- 潮间带 /
- 表层沉积物 /
- 底栖硅藻 /
- 空间分布特征 /
- 有机碳
Abstract: Benthic diatom is an important biological community in ecosystems of estuaries and mud flats. The abundance and distribution of the benthic diatom could affect the food supply of marine organism and the survival and migration of sea birds. In this study, the community structure and spatial distribution of benthic diatoms in the surface sediments were investigated at the 14 intertidal zones along the Chinese coastline. 153 diatom species were identified from the samples, and diversity index (Shannon-Weaver index from 1.61 to 4.39) and biomass (from 0.09×10³ to 10×10³ valves/g DW; DW means dry sediment weight) are significantly different in the spatial distribution. Cluster analysis and ANOSIM (r=0.738, P=0.1%< 0.01) indicated that the 14 sampling sites can classify 4 geological groups, according to their diversity and biomass, and the geological groups are in response to the geographical distribution of phytoplankton in the Bohai, Yellow, East and South China Seas, respectively. The correlation analysis indicated that the sediment types and salinity had significant effects on diatom diversity and biomass. Muddy sediments were better for diatom preservation, and species diversity was higher at sites with sandy mud and low salinity. The contents of organic carbon and the biomasses of benthic diatoms in the surface sediments showed significant positive correlation, and the carbon stable isotope ratio (δ¹³C) values (from -25‰ to -20‰) indicated that organic matters were a mixture of terrestrial and sea sources at most sites. Lower δ¹³C values in tidal flats of Jian River, Yellow River, Dagu River and Subei coast indicated the significant contribution of benthic diatoms on the organic carbon.
- intertidal zone /
- surface sediments /
- benthic diatom /
- spatial distribution /
- organic carbon

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