| 摘要: |
| 以子午岭林区的6类生境13个代表样地为取样点，利用巴氏诱罐法研究了步甲类群的多样性及其与生境的关系。结果显示，试验中共采集到步甲1 862头，隶属于3亚科14属29种，个体数量占总数量比例在5%以上的本地常见种有7种，在3%以下的有19种；步甲类群的多样性指数H′在各生境类型中的大小顺序为:针阔混交林>阔叶林>针叶林>灌丛>草地>农田；丰富度以针阔混交林最高，其次是阔叶林,农田最低；人为或自然干扰程度影响步甲的种类组成和个体数量分布，步甲种类和数量在严重干扰情况下减少，在轻度干扰情况下个体较多,在几乎无干扰情况下有下降趋势，但均高于中等和严重干扰的情况。 |
| 关键词: 步甲 多样性 子午岭林区 |
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| 基金项目:甘肃省自然科学基金资助项目(ZS2001-1-38)；陇东学院重点资助项目(Sznk0222) |
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| Species diversity and habitat distribution of carabid (Coleoptera:Carabidae) communities in Ziwuling forest region |
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| Abstract: |
| This study was conducted in Ziwuling forest region of Gansu province,northwest China.Thirteen plots with six different habitats were investigated and the method of pitfall traps was employed to compare the influence of elevation,disturbance and vegetation difference on the diversity of carabids (Coleoptera:Carabidae) and the relation with its living surroundings.29 species of 14 genera in 3 subfamilies were recorded,of which seven species,Calosoma maximowiczi,Campalita chinense,Harpalus calceatus,Harpalus jureceki,Chlaenius micans,Calathus halensis and Amara plebeja,accounted for over 5% of total specimens respectively and were the commonly occurred species in this region.Species diversity (H′value),evenness value and species abundance were hightest in mixed coniferous broad-leaved forests and lowest in crop fields.Severe disturbance from intensive human and natural activity strongly limited species distributions and their abundance.The highest species number and the highest abundance were observed in habitats with a moderate degree of disturbance and habitats in relative stable and undisturbed ecosytems did not show high number of species and abundance. |
| Key words: carabid diversity Ziwuling forest region |
