| 北部湾生态通道模型的构建 |
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| 引用本文： | 陈作志,邱永松,贾晓平.北部湾生态通道模型的构建[J].应用生态学报,2006,17(6):1107-1111. |
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| 作者姓名： | 陈作志 邱永松 贾晓平 |
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| 作者单位： | 1. 中国水产科学研究院南海水产研究所,广州,510300;农业部海洋渔业资源可持续利用重点实验室,青岛,266071;上海水产大学海洋学院,上海,200090
2. 农业部海洋渔业资源可持续利用重点实验室,青岛,266071 |
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| 基金项目： | 国家气象局资助项目;广东省"科技兴海"基金;农业部重点实验室基金 |
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| 摘 要： | 根据1997年～1999年在北部湾进行的渔业资源和生态环境调查数据，利用EwE软件构建北部湾生态系统的营养通道模型，模型由16个功能组构成，包括了哺乳动物和海鸟，每一组都代表在生态系统中具有相似地位的有机体，基本覆盖了北部湾生态系统能量流动的主要过程.模型分析表明，北部湾生态系统的能量流动主要以捕食食物链途径为主，其中无脊椎动物在能量从低级向高层次转换中起关键作用.各功能组的营养级范围为1.00～4.04，哺乳动物占据了最高营养层.生态网络分析表明，系统的能量流动主要有6级，来自初级生产者的能流效率为12.2%，来自碎屑的转换效率为12.3%，平均能量转换效率为12.2%.模型估算的可利用的生物量密度为8.7 t·km-2，生态系统的生物生产量只占系统净初级生产力的1.81%.当前北部湾海洋生态系统处于不稳定状态.
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| 关 键 词： | 生态通道模型 北部湾生态系统 生态网络分析 系统成熟度 |
| 文章编号： | 1001-9332(2006)06-1107-05 |
| 收稿时间： | 2005-06-20 |
| 修稿时间： | 2006-03-09 |
Mass-balance ecopath model of Beibu Gulf ecosystem |
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| CHEN Zuozhi,QIU Yongsong,JIA Xiaoping.Mass-balance ecopath model of Beibu Gulf ecosystem[J].Chinese Journal of Applied Ecology,2006,17(6):1107-1111. |
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| Authors: | CHEN Zuozhi QIU Yongsong JIA Xiaoping |
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| Affiliation: | South China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Guangzhou 510030, China. zzchen2000@163.com |
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| Abstract: | Based on the investigation of fishery resources and eco-environment in the Beibu Gulf of northern South China Sea from October 1997 to May 1999, and with EwE software, a mass-balance ecopath model of Beibu Gulf ecosystem was constructed, which consisted of 16 functional groups (boxes) including marine mammals and seabirds, each representing the organisms with similar roles in the food web, and covered the main trophic flow in Beibu Gulf ecosystem. The food web in Beibu Gulf ecosystem was dominated by detrital path, and benthic invertebrate played a significant role in transferring energy from detritus to higher trophic levels. Phytoplankton was the primary producer, and the fractional trophic levels ranged from 1.00 to 4.04, with marine mammals occupying the highest trophic level. By using network analysis, the system network was mapped into a linear food chain, and six discrete trophic levels were found, with a mean transfer efficiency of 12.3% from detritus, and 12.2% from primary producer within the ecosystem. The biomass density of commercially utilized species estimated by the model was 8.7 t x km(-2), and the bioproduction only accounted for 1.81% of the net primary production, which indicated that the system was still in developing status and instable. |
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| Keywords: | Ecopath model Beibu Gulf ecosystem Eco-network analysis System maturity |
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