Impact of great gerbils(Rhombomys opimus) on desert plant communities  

作　　者：XU Wenxuan LIU Wei YANG Weikang WANG Muyang XU Feng David BLANK 

机构地区：[1]Key laboratory of Biogeography and Bioresources in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences [2]College of Life Science and Technology, Southwest University for Nationalities

出　　处：《Journal of Arid Land》2015年第6期852-859,共8页干旱区科学（英文版）

基　　金：granted by the National Basic Research Program of China (2014CB954204);the National Natural Science Foundation of China (30970476);the Western Light Program of the Chinese Academy of Sciences (XBBS201309)

摘　　要：Great gerbil（Rhombomys opimus） colonies, with bare soil and herbaceous plants, are conspicuous to the background environment throughout their range area. In order to quantify the engineer role of great gerbils, we investigated the plant communities of 20 active colonies in the Junggar Basin, Xinjiang, China. In areas without disturbance, desert plant communities were dominated by the shrubs with low level species richness. In burrow areas and surrounding intermediate areas, which were disturbed by great gerbils, the shrubs were suppressed with the decrease of vegetation cover and aboveground biomass. As a result, ＂niche gaps＂ were created in disturbed areas and worked as a refuge for herbaceous annuals and perennials. So the existence of great gerbils increased the overall species richness of the desert. Furthermore, herbaceous annuals and perennials are the major food source for great gerbils in spring, indicating that great gerbils have a mutually beneficial relationship with herbaceous plants.Great gerbil（Rhombomys opimus） colonies, with bare soil and herbaceous plants, are conspicuous to the background environment throughout their range area. In order to quantify the engineer role of great gerbils, we investigated the plant communities of 20 active colonies in the Junggar Basin, Xinjiang, China. In areas without disturbance, desert plant communities were dominated by the shrubs with low level species richness. In burrow areas and surrounding intermediate areas, which were disturbed by great gerbils, the shrubs were suppressed with the decrease of vegetation cover and aboveground biomass. As a result, ＂niche gaps＂ were created in disturbed areas and worked as a refuge for herbaceous annuals and perennials. So the existence of great gerbils increased the overall species richness of the desert. Furthermore, herbaceous annuals and perennials are the major food source for great gerbils in spring, indicating that great gerbils have a mutually beneficial relationship with herbaceous plants.

关 键 词：Rhombomys opimus ecosystem engineer species richness mutually beneficial relationship 

分 类 号：Q948.122.5[生物学—植物学]