| 摘要: |
| 潮间带是典型的陆海交互区，其生物群落及其环境具有典型性特征。海洋小型底栖动物具有极高的群落多样性和环境适应性，但是其时空分布特征以及与环境因子的关系研究具有区域局限性。2017年春季（5月）、夏季（8月）和秋季（10月）于我国纬度最高的双台子河口潮间带，布设7个断面，21个站位，进行了小型底栖动物和沉积环境的定量采样与分析。共检获7个小型底栖动物主要类群，总平均丰度和生物量分别为（3530±1474）ind./10cm2和（1836.5±976.3）μg dwt/10cm2，其中海洋线虫为最优势类群，平均丰度和生物量分别占96.6%和72.1%，其次是双壳类和桡足类。丰度/生物量的季节波动小，自陆向海略呈降低趋势（高位≥中位>低位），统计分析表明其与中值粒径和和叶绿素a含量显著相关。小型底栖动物群落受季节和潮位影响显著，Bio-env分析显示相关性最高的环境因子组合为沉积物中值粒径、叶绿素和脱镁叶绿酸含量。海洋线虫与桡足的比值（N/C）评估显示该区域存在有机污染，且研究区西部最严重，与同区有机污染物的环境评价结果较为一致，说明其在生物监测中具有重要意义。 |
| 关键词: 双台子河口 砂质潮间带 小型底栖动物 群落结构 |
| DOI：10.11693/hyhz20191000202 |
| 分类号: |
| 基金项目:国家自然科学基金项目，41576154号；海洋公益性行业科研专项经费项目，201305043号。 |
|
| MEIOFAUNAL COMMUNITY IN SANDY INTERTIDAL ZONE AND ITS ENVIRONMENTAL RESPONSE IN SHUANGTAIZI ESTUARY, NE CHINA |
|
YANG Chun-Yi1, ZHANG Long-Hui2, DU Yong-Fen3, WU Ya-Ping1, ZHANG An-Guo4, YUAN Xiu-Tang4
|
|
1.College of Oceanography, Hohai University, Nanjing 210098, China;2.School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China;3.College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China;4.National Marine Environmental Monitoring Center, Dalian 116023, China
|
| Abstract: |
| Intertidal area is a typical land-sea interaction zone, where the characteristics in biological composition and their micro-environments are of regional representative. Among them, meiofauna has extremely high community diversity and environmental adaptability, while the data of their spatial-temporal distribution patterns and the related regulators are of regional limit. Cores sediments were quantitatively taken in the northernmost-intertidal zone of the Shuangtaizi estuary in the Bohai Sea, NE China in May (spring), August (summer), and October (autumn) in 2017. Twenty-one stations were designed in seven sections, along which the meiofauna and sedimentary environments were analyzed. Seven meiofaunal taxa were found. Free-living marine nematodes were the most dominant group, accounting for 96.6% and 72.1% of the total in abundance and biomass composition, respectively, followed by bivalves and copepods. The average abundance and biomass of meiofauna were (3530±1474)ind./10cm2 and (1836.5±976.3)μg dwt/10cm2, respectively, with no seasonal variation and downward trends from land to sea. The medium grain size and chl a were correlated significantly to the abundance/biomass. The ratio of nematodes/copepod (N/C) indicated serious organic pollution, which agreed with the results of the macrofaunal analysis and heavy metal samplings in the similar areas, and could be used as a bio-monitoring indicator. |
| Key words: Shuangtaizi estuary sandy intertidal zone meiofauna community structure |
