盐池四墩子荒漠草原拟步甲昆虫群落多样性研究

Diversity of darkling beetles in desert steppe in Yanchi of Ningxia,China

为了摸清荒漠草原优势昆虫类群拟歩甲科的空间动态变化特征,本文利用陷阱法对盐池四墩子的荒漠草原、人工干扰荒漠草原、半人工干扰荒漠草原、放牧草原4类生境共6个样带的拟步甲昆虫进行了系统研究调查,共采集标本5431头,分属10属20种。并在此基础上分析了不同生境和不同环境因子对拟步甲昆虫空间动态分布特征。结果表明:长芒草带相对于其他生境拥有更多的拟步甲个体数和物种数,一些典型的荒漠半荒漠拟步甲种类栖于此生境;对荒漠草原适度干扰(半人工干扰荒漠草原)有利于提高拟步甲群落的物种数。此外,结合环境因子对拟步甲空间动态进行分析,这些结果为揭示草原拟歩甲群落的分布特征以及功能研究提供了重要的基础数据。

Darkling beetles are highly diverse and abundant in crop fields and semi -natural habitats across the world, which have important functions in agroecosystems such as controlling pests and maintaining food chain robustness. In order to determine the spatial distribution and characteristics of darkling beetles, pitfall trap methods were used to collect darkling beetles in four different grassland types. In the experiment, 5431 individuals representing 10 genus and 20 species were obtained. Abundance and species diversity of darkling beetles in Chinese silvergrass habitats were higher than that in other three habitat types. Most special species in desert and semi - desert habitats lived in Chinese silvergrass. Intermediate disturbance could enhance species diversity of darkling beetles in desert and semi- desert habitats. In addition, these results supplied important data for the study species distribution characteristics and function of darkling beetles.