作　　者： ; ; ; ;

机构地区： 九江学院生命科学学院

出　　处： 《西南大学学报（自然科学版）》 2009年第12期14-20,共7页

摘　　要： 系统调查了具代表性的撂荒地、林区和农林交错带3种不同生境紫茎泽兰对生态群落中节肢动物群落的组成与结构的影响.结果表明:撂荒地紫茎泽兰分布区内的节肢动物物种数、个体数均大于农林交错地和林地紫茎泽兰分布区,且差异显著;农林交错地的个体平均数大于林地紫茎泽兰区,但物种数平均值相近.撂荒地紫茎泽兰区节肢动物分布特征是以植食性昆虫为主,其个体数量几乎占到节肢动物总数的三分之二;而农林交错带和林地紫茎泽兰区中,天敌和害虫比例分布相对比较均衡.撂荒地紫茎泽兰分布区内植食性昆虫虽多,但天敌的物种及个体数量较少,林区和农林交错地带,其生境相对封闭并且受各种干扰较少,植食性昆虫的物种稳定性相比撂荒地要高很多,因此天敌和害虫数量相对均衡. The composition and structure of arthropod communities at three different habitats with E.adenophorum Spreng distribution,i.e.wastelands,forests and intervening area between farms and forests,were investigated.The results showed that the numbers of individuals and species of arthropods in the waste land were significantly higher than those in the forests and intervening area between farms and forests.The average number of arthropod individuals in the intervening area between farms and forests was greater than that in the forests,but the average number of arthropod species was similar.The distribution of arthropods in waste land with E.adenophorum Spreng was characterized by predominance of phytophagous insects,which accounted for nearly two thirds of the total numbers of arthropods.In contrast,the distribution ratio of natural enemies and pests was relatively balanced in forests and intervening area between farms and forests covering with E.adenophorum Spreng.The numbers of species and individuals of natural enemies in waste land were smaller than those in the forests and intervening area between farms and forests though there were a large number of phytophagous insects in it.In the forests and intervening area between farms and forests,there were fewer distributing factors in the closed niches and,therefore,greater stability existed in species of phytophagous insects,resulting in a relative balance of natural enemies and pests.

关 键 词： 紫茎泽兰 节肢动物 多样性

领　　域： [农业科学]