东海水域中上层鱼类资源的空间异质性

应用生态学报 ›› 2003, Vol. ›› Issue (11): 1971-1975.

东海水域中上层鱼类资源的空间异质性

苏奋振^1,2, 周成虎², 仉天宇², 杜云艳², 姚长青²

1. 中国科学院地理科学与资源研究所, 北京 100101;
2. 中国科学院遥感应用研究所, 北京 100101

收稿日期:2002-01-06 修回日期:2002-08-12 出版日期:2003-11-15
通讯作者: 苏奋振,男,1972年生,博士后,主要从事RS&GIS在环境、资源和生态方面的研究及其数据挖掘,发表论文10余篇.Tel:010-64889764.E-mail:sufz@lreis.ac.cn.
基金资助:
国家“863”计划资助项目(2002AA639400,2001AA633010)

Spatial heterogeneity of pelagic fishery resources in the East China Sea

SU Fenzhen^1,2, ZHOU Chenghu², ZHANG Tianyu², DU Yunyan², YAO Changqin²

1. Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
2. Institute of Remote Sensing Application, Chinese Academy of Sciences, Beijing 100101, China

Received:2002-01-06 Revised:2002-08-12 Online:2003-11-15

摘要/Abstract

摘要： 定量描述鱼类分布的空间变异,有利于从生态学意义上理解其空间分布及其与环境的关系.本文利用地理信息系统将东海区中上层鱼类资源密度空间化,运用空间自相关指数Gearyc和变异函数理论分析其空间自相关和空间变异.东海区中上层鱼类资源空间分布平均场的Gearyc指数为0.25,各向同性随机变异占总变异的19.1%,表明其空间分布具有较高的自相关特性.空间分布上各向变异不一致,其中45°和135°方向上变异曲线斜率急剧变化,表明这两个方向上存在重要的环境动力过程.各年份平均资源密度与相关变异(C)正相关,而与随机变异(C0)不存在相关,表明年际密度变化主要由空间自相关引起.变异曲线分维数(D)与密度呈负相关,说明密度的增加是由于鱼类在空间上的集聚程度增高引起的.

Abstract: Quantitative description of spatial heterogeneity can help the understanding of the distribution of fishery resources and its relationship with the environment from ecological view. Based on geographic information system, the Geary index for the density distribution of pelagic fish was calculated, and the semivariograms were drawn. The Geary value c was 0.25 and Co/ (Co+C) was 19.1%, indicating that the distribution of the pelagic fish had a high spatial autocorrelation with anisotropy. The sharp slope of semivariogram in the directions of 45? and 135? meant that there existed important dynamic environmental processes in the two directions. The annual fluctuation of fishery resource density was caused by the spatial autocorrelation, because the density had a significantly positive correlation with value C, but no correlation with C0. The fractal dimension Dwas negatively correlated with the density, meaning that the density increase was resulted from the increase of spatial fish centralizing.

中图分类号:

Q932.4
S931

苏奋振, 周成虎, 仉天宇, 杜云艳, 姚长青. 东海水域中上层鱼类资源的空间异质性[J]. 应用生态学报, 2003, (11): 1971-1975.

SU Fenzhen, ZHOU Chenghu, ZHANG Tianyu, DU Yunyan, YAO Changqin. Spatial heterogeneity of pelagic fishery resources in the East China Sea[J]. Chinese Journal of Applied Ecology, 2003, (11): 1971-1975.

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