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塔里木河下游荒漠河岸林群落最小取样面积

牛俊勇1,2;徐海量1;李吉玫1,2;杨红梅1,2   

  1. 1中国科学院新疆生态与地理研究所, 乌鲁木齐 830011;2中国科学院研究生院, 北京 100049
  • 收稿日期:2008-10-28 修回日期:1900-01-01 出版日期:2009-06-10 发布日期:2009-06-10

Minimum sampling area for desert riparian forest community in lower reaches of Tarim River.

NIU Jun-yong1,2;XU Hai-liang1;LI Ji-mei1,2;YANG Hong-mei1,2   

  1. 1Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-10-28 Revised:1900-01-01 Online:2009-06-10 Published:2009-06-10

摘要: 选择塔里木河下游退化程度不同的3个典型断面,采用相邻样方格子法,调查荒漠河岸林群落的种-面积关系,利用种-面积饱和曲线方程拟合的方法对群落的最小取样面积进行研究。结果表明,3个断面的群落最小面积分别设为1500、2000和2500 m2可以满足精度为60%~80%的研究要求,满足精度为90%研究要求的群落最小面积分别为2500、3600和4500 m2;群落最小面积呈现随植被退化程度加重而逐渐增大的趋势,而地下水埋深对群落最小面积的影响并不明显;种-面积饱和曲线针对塔里木河下游荒漠河岸林群落最小面积拟合的效果较好。

关键词: 截形叶螨, 玉米, 存活曲线, 种群参数

Abstract: Three typical sections with different vegetation degradation degrees i n the lower reaches of Tarim River were selected to investigate the species-are a relationship of desert riparian forest community by the grid method of contigu ous quadrats, and to determine the minimum sampling area of the community by fit ting with species-area saturation curve equation. At the precision leve1 of 60% 〖KG-*4〗-〖KG-*7〗80%, the minimum sampling areas of the three sections could b e set as 1500, 2000, and 2500 m2; while at 90% precision level, the minimum sa mpling areas could be set as 2500, 3600 and 4500 m2, respectively. The minimum sampling area increased with aggravating vegetation degradation. Groundwater le vel had less effect on the minimum sampling area. For the desert riparian forest s in the lower reaches of Tarim River, species-area saturation curve equation c ould better fit the minimum sampling area.

Key words: Tetranychus truncates, Corn, Survival curve, Population parameters