| 摘要: |
| 为了解三门湾游泳动物资源状况,于2019年11月(秋季)和2020年4月(春季)采用底拖网调查方法研究了三门湾游泳动物群落结构、资源密度、生物多样性及其时空分布格局,同时还使用了组平均聚类法分析和非线性多维标度分析以及冗余分析来研究该海湾游泳动物群落结构与环境因子的关系。本研究共鉴定出游泳动物83种,隶属于16目40科61属。春季调查中共出现4种优势种,秋季调查中共有7种优势种,两季共有优势种包括口虾蛄(Oratosquilla orarotia)、龙头鱼(Harpadon nehereus)和三疣梭子蟹(Portunus trituberculatus)。季节分布上,秋季平均资源密度、优势种种类数和多样性指数均高于春季。空间上,资源密度较高的站位主要集中在湾内,物种数量和多样性指数较高的站位则分布于湾外。春、秋季的群落结构有极显著差异(P<0.01)。RDA分析结果表明,温度和盐度是影响三门湾游泳动物群落结构的主要因素。 |
| 关键词: 三门湾 游泳动物 群落结构 优势种 生物多样性 |
| DOI：10.11693/hyhz20211000238 |
| 分类号: |
| 基金项目:国家自然科学基金项目,42076169号;国家重点研发计划项目,2018YFD0900901号,2019YFD0901101号;自然资源部第二海洋研究所基本科研业务费专项,JG2106号;浙江省自然科学基金杰出青年项目,LR21D060001号;自然资源部海洋生态系统动力学重点实验室开放研究基金项目,MED202003号;中国亚太经合组织合作基金,2029901号;卫星海洋环境动力学国家重点实验室自主课题重点项目,SOEDZZ2102号。 |
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| ANALYSIS OF COMMUNITY STRUCTURE AND BIODIVERSITY OF NEKTON IN THE SANMEN BAY |
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MA Lu-Kuo1,2, CHEN Quan-Zhen1, CHENG Fang-Ping1, PENG Xin3, CHEN Wei-Feng3, ZENG Jiang-Ning1, SHI Xi-Zhi2, HUANG Wei1
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1.Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China;2.School of Marine Science, Ningbo University, Ningbo 315211, China;3.Zhejiang Mariculture Research Institute, Wenzhou 325005, China
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| Abstract: |
| Two fishery surveys were conducted to reveal the community structure, biomass, and biodiversity of nekton in Sanmen Bay in November, 2019 (autumn) and May, 2020 (spring). The group average cluster analysis, non-metric multidimensional scaling, and redundancy analysis were used to study the relationship between community structure and environmental factors. Eighty-three species were identified in the two surveys belonging to 16 orders, 40 families, and 61 genera. Crustaceans are the main community of the catches. There were 4 dominant species in spring survey and 7 in autumn. The dominant species in both seasons included O. oratoria, H. nehereus, and P. trituberculatus. The average resource density, dominant species, and diversity index in autumn was higher than those in spring. The stations with higher density of swimming animals in the Sanmen Bay are mainly distributed in the inner bay, while the stations with higher species number and diversity index were distributed outside the bay. The difference in community structure of nekton in spring and autumn is significant at the 0.01 level. At last, as the RDA analysis shown, temperature and salinity were the main environmental factors on the variation of community structure of nekton in the Sanmen Bay. |
| Key words: Sanmen Bay nekton community structure dominant species biodiversity |
