| YIN Shengle,TAN Peng,YUAN Chao,HU Jin,LIU Xiaoshou. 2017. Seasonal dynamics of meiofaunal distribution in the Dagu River Estuary, Jiaozhou Bay, China. Acta Oceanologica Sinica, 36(12):79－86 |
| Seasonal dynamics of meiofaunal distribution in the Dagu River Estuary, Jiaozhou Bay, China |
| 胶州湾大沽河口小型底栖动物分布的季节变动 |
| Received:September 23, 2016 |
| DOI：10.1007/s13131-017-1093-0 |
| Key words:meiofauna seasonal dynamics tidal flat Dagu River Estuary Jiaozhou Bay China |
| 中文关键词: 小型底栖动物 季节变动 潮滩 大沽河口 胶州湾 |
| 基金项目:The National Natural Science Foundation of China under contract No. 41576135; the Student Research Development Program of Ocean University of China (OUC-SRDP) under contract No. 101201051. |
| Author Name | Affiliation | E-mail | | YIN Shengle | College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
Graduate School of Frontier Sciences/Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba 277-8564, Japan | | | TAN Peng | College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China | | | YUAN Chao | College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China | | | HU Jin | College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China | | | LIU Xiaoshou | College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China | liuxs@ouc.edu.cn |
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| Abstract: |
| Sediment samples were collected in the intertidal zone of the Dagu River Estuary, Jiaozhou Bay, China in April, July and October 2010 and February 2011 for examining seasonal dynamics of meiofaunal distribution and their relationship with environmental variables. A total of ten meiofaunal taxa were identified, including free-living marine nematodes, benthic copepods, polychaetes, oligochaetes, bivalves, ostracods, cnidarians, turbellarians, tardigrades and other animals. Free-living marine nematodes were the most dominant group in both abundance and biomass. The abundances of marine nematodes were higher in winter and spring than those in summer and autumn. Most of the meiofauna distributed in the 0-2 cm sediment layer. The abundance of meiofauna in high-tidal zone was lower than those in low-tidal and mid-tidal zones. Results of correlation analysis showed that Chlorophyll a was the most important factor to influence the seasonal dynamics of the abundance, biomass of meiofauna and abundances of nematodes and copepods. CLUSTER analysis divided the meiofaunal assemblages into three groups and BIOENV results indicated that salinity, concentration of organic matter, sediment sorting coefficient and sediment median diameter were the main environmental factors influencing the meiofaunal assemblages. |
| 中文摘要: |
| 为研究小型底栖动物分布的季节变动及其与环境因子的关系，于2010年4月、7月、10月和2011年2月在胶州湾大沽河口潮间带进行了沉积物调查采样。共鉴定出10个小型底栖动物类群，包括自由生活海洋线虫（free-living marine nematodes）、底栖桡足类（benthic copepods）、多毛类（polychaetes）、寡毛类（oligochaetes）、双壳类（bivalves）、介形类（ostracods）、刺胞动物（cnidarians）、涡虫类（turbellarians）、缓步动物（tardigrades）和其他类（others）。其中，自由生活海洋线虫在丰度和生物量上都最为优势。海洋线虫的丰度在冬、春两季高于夏、秋两季。大多数小型底栖动物分布在0-2厘米的表层沉积物内。高潮带的小型底栖动物丰度低于中潮带和低潮带。相关性分析结果显示，叶绿素a是影响小型底栖动物丰度和生物量的季节变动以及线虫、桡足类丰度的季节变动的最重要的环境因子。聚类分析（CLUSTER）可将小型底栖动物群落分为3组。BIOENV结果表明盐度、有机质含量、沉积物分选系数和中值粒径是影响小型底栖动物群落的主要因素。 |
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