| 辽河口邻近海域小型底栖生物的空间分布及季节变化 |
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| 引用本文： | 叶晟,孔飞,李宏俊,刘敏,李洪波,邵魁双,樊景凤,郭皓.辽河口邻近海域小型底栖生物的空间分布及季节变化[J].海洋学报,2017,39(10):78-89. |
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| 作者姓名： | 叶晟 孔飞 李宏俊 刘敏 李洪波 邵魁双 樊景凤 郭皓 |
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| 作者单位： | 1.国家海洋环境监测中心 国家海洋局近岸海域生态环境重点实验室, 辽宁 大连 116023;大连海洋大学 水产与生命学院, 辽宁 大连 116023 |
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| 基金项目： | 海洋公益性行业科研专项经费（201305030，201505027）。 |
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| 摘 要： | 本文研究了辽河口邻近海域2013年8月、10月和2014年5月3个航次小型底栖生物的种类及其空间分布，分析了小型底栖生物丰度和生物量的季节变化。结果表明，3个航次（夏季、秋季和春季）小型底栖生物的平均丰度分别为（264±83） ind/（10 cm2）、（216±85） ind/（10 cm2）和（227±67） ind/（10 cm2），平均生物量分别为（272±125）μg/（10 cm2）、（207±89）μg/（10 cm2）和（244±103）μg/（10 cm2）。与其他研究海域相比，辽河口小型底栖的丰度和生物量处于较低水平。共鉴定出了14个小型生物类群，按照丰度排序，线虫是最优势的类群，夏季、秋季和春季3个航次占总丰度的比例分别为94.0%、92.5%和90.8%；其他优势类群为多毛类、桡足类和双壳类。小型底栖生物量的优势类群则为多毛类（41.1%~44.0%），高于线虫（33.8%~36.5%），其次是双壳类（2.6%~6.7%）。水平分布的研究表明，调查海域近岸入海口小型底栖生物的丰度和生物量普遍低于近海海域，但是秋季时近岸分布与近海差距不大。垂直分布的研究表明，95.9%的小型底栖生物分布于0~5 cm的表层沉积物中。小型底栖生物的丰度和生物量在夏季时都达到高峰值。与环境因子的相关分析表明，小型底栖生物的数量分布与盐度和水深呈极显著正相关（P<0.01），与叶绿素a呈显著正相关（P<0.05）。
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| 关 键 词： | 小型底栖生物 辽河口 群落结构 丰度 生物量 环境变量 |
| 收稿时间： | 2017/1/12 0:00:00 |
| 修稿时间： | 2017/4/25 0:00:00 |
Spatial distribution and season variation of meiobenthos community in the Liaohe Estuary |
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| Ye Sheng,Kong Fei,Li Hongjun,Liu Min,Li Hongbo,Shao Kuishuang,Fan Jingfeng and Guo Hao.Spatial distribution and season variation of meiobenthos community in the Liaohe Estuary[J].Acta Oceanologica Sinica (in Chinese),2017,39(10):78-89. |
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| Authors: | Ye Sheng Kong Fei Li Hongjun Liu Min Li Hongbo Shao Kuishuang Fan Jingfeng and Guo Hao |
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| Institution: | Key Laboratory for Ecological Environment in Coastal Areas, National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China;College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China,Liaoning Marine Environmental Forecasting and Disaster Prevention and Mitigation Center, Shenyang 110001, China,Key Laboratory for Ecological Environment in Coastal Areas, National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China,Key Laboratory for Ecological Environment in Coastal Areas, National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China;College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China,Key Laboratory for Ecological Environment in Coastal Areas, National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China,Key Laboratory for Ecological Environment in Coastal Areas, National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China,Key Laboratory for Ecological Environment in Coastal Areas, National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China and Key Laboratory for Ecological Environment in Coastal Areas, National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China |
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| Abstract: | The benthic meiofauna was quantitatively investigated in the Liaohe Estuary in August (summer) in 2013, October (autumn) in 2013 and May (spring) in 2014, and its spatial distribution and season variation were studied. The mean abundance of the meiofauna in summer, autumn and spring was (264±83) ind/(10 cm2), (216±85) ind/(10 cm2) and (227±67) ind/(10 cm2), respectively, and the mean biomass was (272±125) μg/(10 cm2), (207±89) μg/(10 cm2) and (244±103) μg/(10 cm2), respectively. Compared with other studied areas, the abundance and biomass of meiofauna in Liaohe Estuary were at a low level. A total of 14 meiofauna groups were identified. Free-living marine nematodes were the most dominant group in abundance, with the dominance of 94%, 92.5% and 90.8% in summer, autumn and spring, respectively, followed by polychaetes, benthic copepods and bivalves. In terms of biomass, the dominant groups were polychaetes (41.1%-44.0%), nematodes (33.8%-36.5%) and bivalves (2.6%-6.7%). The study of horizontal distribution showed that the abundance and biomass of the benthic meiofauna in inshore water were generally lower than those in offshore water, except autumn. The study of vertical distribution showed that 95.9% of the meiofauna distributed in the top 0-5 cm sediment. The abundance and biomass of the benthic meiofauna both reached their peak in summer. The correlation analysis indicated that the abundance of meiobenthos high significantly correlated with depth and salinity (P<0.01), and significantly correlated with Chl a(P<0.05). |
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| Keywords: | meiobenthos Liaohe Estuary community structure abundance biomass environment variation |
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