从正相互作用角度诠释过度放牧引起的草原退化  

Using positive interaction ecology to explain grassland degradation induced by overgrazing

作　　者：王鑫厅[1] 王炜[2] 梁存柱[2] 刘钟龄[2] 

机构地区：[1]内蒙古工业大学能源与动力工程学院,呼和浩特010051 [2]内蒙古大学生命科学学院,呼和浩特010021

出　　处：《科学通报》2015年第28期2794-2799,共6页Chinese Science Bulletin

基　　金：国家重点基础研究发展计划(2014CB138802);国家自然科学基金(31160476);内蒙古自然科学基金(2011MS0517);内蒙古工业大学科研基金(ZD201403);内蒙古工业大学高层次引进人才科研启动基金资助

摘　　要：过度放牧引起的草原退化已是不争的事实,为生态学领域重大的科学问题.不同学者从不同角度进行探讨,但尚未回答"过度放牧为什么会引起草原退化?"这一本质问题.近年来,以胁迫梯度假说为核心的正相互作用成为生态学家关注的焦点,是驱动群落结构和功能的基本动力.正相互作用对于草原退化意味着什么?本文尝试从正相互作用的角度解读过度放牧引发的草原退化,回答"过度放牧为什么会引起草原退化?",从新的视角认识过度放牧导致的草原退化.Overgrazing of grassland ecosystems in the temperate steppe region of China has resulted in serious degradation and a distinct vegetation pattern. Grassland degradation is a major concern to ecologists and has been the focus of much recent research. A lot of work has been done on grassland degradation in grassland communities but few studies have explored the mechanisms of degradation from an ecological theory perspective. Positive interaction ecology theory has become one of the major themes in ecology, particularly the Stress Gradient Hypothesis. In the following study we attempt to explain the mechanisms of grassland degradation using positive interaction ecology and provide a new perspective for recognizing grassland degradation.

关 键 词：正相互作用 草原退化 植物个体小型化 

分 类 号：S812.6[农业科学—草业科学]