| 摘要: |
| 本研究利用2006年、2009年、2011年和2013年所获得的长江口及临近海域大型底栖动物样品进行功能群分类，并与相应环境因子进行相关性分析。历年调查获得大型底栖动物分别为256种、251种、261种和343种，分为五类功能群，包括浮游生物食者（planktophagous group，Pl）、植食者（phytophagous group，Ph）、肉食者（carnivorous group，C）、杂食者（omnivorous group，O）、碎屑食者（detritivorous group，D）。研究发现在调查区域中平均生物量和平均密度均有上升，底栖动物整体趋于小型化，其中肉食者功能群占主导地位，浮游生物食者功能群增长较快，植食者功能群数量较少。环境因子中，溶解氧、硝酸盐、pH和温度对功能群生物密度的影响较大。本研究通过分析功能群演替及其与环境因素的关系为日后大型底栖动物功能群演化的研究提供基础资料，为生态修复提供基本数据支持。 |
| 关键词: 长江口 大型底栖动物 功能群 年际变化 环境因素 |
| DOI：10.11693/hyhz20191100238 |
| 分类号:Q958.1 |
| 基金项目:国家基础研究计划（973计划），2010CB428903号；国家重点研发计划，2018YFD0900901号；自然资源部第二海洋研究所基本科研业务费专项资金项目JG1616号；长江口-浙江近海-邻近东海多学科长期观测计划LORCE，14282号；海洋公益性行业科研专项No.201505004-3号；国家自然科学基金41706125号。 |
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| THE SUCCESSION OF MACROBENTHIC FUNCTIONAL GROUPS IN CHANGJIANG RIVER ESTUARY AND ITS ADJACENT WATERS |
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HE Liu-Zhen, SHOU Lu, LIAO Yi-Bo, TANG Yan-Bin, LIU Qiang, LIU Qing-He, CHEN Quan-zheng, GAO Ai-Gen
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Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
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| Abstract: |
| Marine surveys were conducted and samples collected on macrobenthic fauna composition and distribution in the Changjiang (Yangtze) River estuary and its adjacent waters in 2006, 2009, 2011, and 2013. The functional groups were classified and their correlations with corresponding environmental factors were analyzed. The macrobenthic species number of each calendar year was respectively 256, 251, 261, and 343, based on which five functional groups were recognized, including planktophagous, phytophagous, carnivorous, omnivorous, and detritivorous. Results show that in the study area, both average biomass and average biological density increased, and species of the benthic fauna tended to be miniaturized. The carnivorous functional group dominated, the planktophagous functional group increased rapidly, and the phytophagous functional group remained small in proportion. Among the environmental factors, dissolved oxygen, nitrate, pH, and temperature had a great influence on the biological density of functional groups. |
| Key words: Changjiang (Yangtze) River estuary macrobenthic functional group interannual variability environmental factors |
