| 摘要: |
| 鱼类群落是水域生态系统内生产力动态的重要输出成分,也是当今以生态系统多样性为核心的生物多样性研究的主要内容。分析鱼类群落结构,通常采用描述自然群落多样性综合指数,如物种数、生态密度和群落多样性结构指数(朱鑫华等,1994a, Washington,1984),或通过多元统计分析的方法,比较群落内生物因素的时空格局动态特征及其与非生物环境参数的相关性(朱鑫华等,1994b; Ardisson et al.,1990)、优势种代表站区和主成分鱼种空间分布特征(周建魁,1984;徐青,1988)。本文运用多元统计分析中的因子分析法,解析渤海鱼类群落指标——全部鱼种个体数生态密度(NED)时空分布格局特征,旨在探讨鱼类群落时空格局易变性和稳定性,以解释増殖水域群落结构特征、多鱼种种间关系及其鱼种生态栖息地利用间的相互关系(Ulanowicz and Platt,1985),这一问题已成为当前生物群落动力学研究的热点问题(Diamond and Case,1986, Morris,1987)。 |
| 关键词: 鱼类群落、时空格局 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第2389号 |
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| SPATIOTEMPORAL PATTERNS OF FISH COMMUNITY IN BOHAI SEA USING FACTOR ANALYSIS OF INDIVIDUAL NUMBER INDICATORS |
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Zhu Xinhua
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Institute of Oceanology,Chinese Academy of Sciences
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| Abstract: |
| Factor analysis was used to extract the spatiotemporal patterns of the whole fish community from NED (ecological density in number) in the inter-decade period from 1982~1985 to 1992-1993.Analogous relationship between principal representative species and amalgamated stations for those distributions of NED has shown dynamic trends that led to the seasonal altemation.In the same period of different months, the more species occurred, the more the first principal representative species.Positive relation of species number to commonalty resulted in more diversity combinations in the spatial distribution. According to these patterns among the total species number and principal representative species as well as numerous intrusions into the specific stations, three sub-regions were defined in Laizhou Bay(from stations 23 to 30 ) Liaodong Bay(from stations 1, 3, 4, 6-9) as well as Bohai Bay and its middle part (from stations 10 to 23). Among the 30 stations in the Bohai Sea, there were 18 stations to be ascribed to the first principal components of NED spatial distribution from November to April, more than those in Autumn and no station appeared of every station to the whole months. The inter-decade data showed more species re-occurred in spring and Japanese achovies, Engraulis japonicas,has become predominant species under the prevailing fisheries ecological condition. |
| Key words: fish community,spatiotemporal patterns |
