皇甫川流域蛴螬群落对不同水土治理措施的响应

Responses of a Scarab Larval Community to Different Water-soil Erosion Control Methods in the Huangfuchuan Watershed,Inner Mongolia,China

指出了综合治理措施的实施对皇甫川流域内水土流失起到了明显控制作用,探究不同生物类群对各种人工植被建立的响应是评价其稳定性和科学性的基础,并可以为人工植被的管理提供参考。2007年9月~2008年9月,采用土壤样方法采集蛴螬标本,以不同水土治理措施植被、耕作农田和天然草地为研究样地,分析了内蒙古皇甫川流域不同水土治理方式对蛴螬群落的影响。结果表明:共捕获蛴螬578头,隶属于2科6属7种。其中,优势种为东方绢金龟和毛缺鳃金龟。不同人工植被中蛴螬群落的个体数和多样性均较农田提高,人工林地中提高尤为明显;两种优势蛴螬夏季发生程度高于春季和秋季(P<0.05)。可以认为,皇甫川小流域综合治理工程中人工林地种植对蛴螬群落多度和多样性的维持较为有益,人工植被的管理中应该特别注意人工杨树林中两种优势蛴螬发生的监测和防治。

The implementation of comprehensive management measures(mainly to establishment of the artificial plantations)had obvious effects on controlling soil and water loss in the Huangfuchuan watershed,Inner Mongolia,China.Probing into the responses of different biological taxa to the establishment of the artificial plantations is the fundamental knowledge for estimating their science and stability and can provide references for their management.From September 2007 to September 2008,Scarab larvae were collected by handpicking in various artificial plantations.We investigated the effects of different soil and water conservation methods on the Scarab larval community in the Huangfuchuan watershed.A total of 578 Scarab larvae were captured,belonging to two families,six genera and seven species.Serica orientalis and Diphycerus davidis served as the dominant species.The number of individuals and biodiversity of Scarab larval communities in different soil and water conservation plots were higher than that of farm land and obviously higher in plantation woodland.The numbers of individuals of the two dominant species were higher in summer.We can conclude that the plantation woodland were effective at maintaining the abundance and biodiversity of the Scarab larval community in the Huangfuchuan watershed,and special attention should be paid to monitoring and controlling the two dominant Scarab larvae in the Populus simonii woodland.