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黄土高原洛河流域蝗虫群落排序及环境因素分析
引用本文:常罡,廉振民,蒋国芳,王彦青,刘慧.黄土高原洛河流域蝗虫群落排序及环境因素分析[J].昆虫知识,2006,43(1):41-46.
作者姓名:常罡  廉振民  蒋国芳  王彦青  刘慧
作者单位:1. 陕西师范大学生命科学学院,西安,710062
2. 延安大学,延安,716000
基金项目:陕西省自然科学基金资助项目(2003C127)
摘    要:应用相似性分析、主成分(PCA)分析及多元逐步回归等方法比较了洛河流域黄土高原不同地区蝗虫的群落结构。结果显示:吴旗和志丹、富县和黄陵的相似性均很高,甘泉则更加靠近富县和黄陵,相似性分析的结果反映了该地区蝗虫群落在地理上的分布规律。对各地点气候因素和蝗虫群落所进行的主成分分析,结果非常理想,三维主成分的累计方差贡献率分别达到了96.22%和92.06%。通过多元逐步回归发现,促进蝗虫发生的气候因子有5~9月平均气温、5~9月平均总降水、年平均总降水和年平均日照时数,抑止因子有5~9月最低降水等;促进蝗虫发生的植被因素有草本植物高度多样性、树木盖度、豆科优势度和其他科优势度等几个因素,抑止因素有禾本科优势度、莎草科优势度等。

关 键 词:相似性  主成分  多元逐步回归
收稿时间:12 26 2004 12:00AM
修稿时间:2004-12-262005-04-27

Ordination and environmental factors analysis of grasshopper community in Luo River District of Loess Plateau
CHANG Gang,LIAN Zhen-Min,JIANG Guo-Fang,WANG Yan-Qing,LIU Hui.Ordination and environmental factors analysis of grasshopper community in Luo River District of Loess Plateau[J].Entomological Knowledge,2006,43(1):41-46.
Authors:CHANG Gang  LIAN Zhen-Min  JIANG Guo-Fang  WANG Yan-Qing  LIU Hui
Abstract:This paper compared the structure of grasshopper community in Loess Plateau of Luo River district by using similarity analysis,principal component analysis and stepwise regression.The results show that the similarity between Fuxian and Huangling,Wuqi and Zhidan is very high,Ganquan is greatly closed to Fuxian and Huangling.The results of similarity analysis reveal the geographical distribution rule of grasshopper community in this area.The results which were got by using PCA to analyze the climate factors and grasshoppers community,are fairly ideal,as the cumulative percent of three principal components reach 96.22% and 92.06% respectively.By stepwise regression analysis,it shows that several climate factors,which are the mean temperature of May to September,the mean total precipitation of May to September,the yearly mean total precipitation and the yearly mean sunlight hours,accelerate the growth of grasshopper,while the minimum precipitation of May to September restrain the growth of grasshopper;moreover,some vegetation factors,such as the grass height diversity,the tree density,the Leguminosae dominance degree,and other grass dominance degree,also accelerate the growth of grasshopper,while the Gramineae dominance degree and the Cyperaceae dominance degree restrain the growth of grasshopper.
Keywords:similarity  PCA  stepwise regression
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