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应用生态学报 ›› 1992, Vol. 3 ›› Issue (4): 313-320.

• 研究论文 • 上一篇    下一篇

科尔沁沙地盐生草甸主要植物群落种群格局的研究

傅星, 南寅镐   

  1. 中国科学院沈阳应用生态研究所, 沈阳 110015
  • 收稿日期:1992-04-24 修回日期:1992-05-28 出版日期:1992-10-25 发布日期:1992-10-25

Population patterns of main communities on halomorphic meadow of Keerqin sandy land

Fu Xing, Nan Yinhao   

  1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1992-04-24 Revised:1992-05-28 Online:1992-10-25 Published:1992-10-25

摘要: 本文采用方差/均值法,Greig-Smith格局分析法及Hill格局分析法,探讨了科尔沁沙地盐生草甸主要植物群落种群格局及其成因。结果表明,羊草群落和野古草群落中的大部分种为聚集分布,羊草与野古草群落交错区中所有种为聚集分布,其最小面积为0.01m2,最大面积为6.4×6.4m2。邻接格子最小取样面积应小于0.05×0.05m2,最适取样面积为40.96m2,小规模格局是种子扩散和营养繁殖的结果,中规模起因于匍匐和长根茎的扩散,大规模则取决于土壤总盐分及pH值。

关键词: 种群, 聚集分布, Poisson分布

Abstract: The population patterns of main communities on halomorphic meadow of Keerqin sandyland and their formations are studied with methods of variance/mean, Greig-Smith's variance analysis for nested quadrats and Hill's pattern analysis. The results show that most of the species in Aneurolepidium ehinense and Arundinella hirta communities and all species in ecotone of these two communities are appeared as aggregated distribution. Its smallest scale is 0.01m2, and the biggest is 6.4×6.4m2. The minimum sampling size of grid should be less than 0.05×0.05m2, and the optimal sampling size is 40.96m2. The small scale pattern is caused by seed dispersion and nutrient reproduction, the middie scale one is caused by extension of stolon and long rhizome,and the large scale pattern is determined by total salt content of soil and soil pH.

Key words: Population, Aggregated distribution, Poisson distribution