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科学通报  2015 

从正相互作用角度诠释过度放牧引起的草原退化

DOI: 10.1360/N972015-00041, PP. 2794-2799

Keywords: 正相互作用,草原退化,植物个体小型化

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Abstract:

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.

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