生态位分离的涵义与测度

 资源状态的实际参数，即资源状态沿着资源利用谱的位置，在经典的生态位重迭公式被忽略，其结果物种生态位重迭测定值将随着资源维分割数目的变化而变化。本文提出将资源状态的实际参数考虑为该资源状态到理论生态位中心点的距离，从而进一步推导出生态位分离的测度公式。以广东鼎湖山厚壳桂(Cryptocarya)群落为例，结果表明物种生态位分离随着维度增加而递增。

THE IMPLICATION OF NICHE SEPARATION AND ITS MEASURE

The actual value of a resource state, or alternatively, a resource state's position along the resource spectrum, is often neglected by empirical niche metric formulae. To remedy this defect, a different niche separation metric formula is needed for measuring species niche dissimilarity. From this approach, the actual value of the resource state is incorporated as a distance from the state to the theoretical niche center in n-dimensional hyperspace. An example from Cryptocarya community in the Dinghushan Nature Reserve, South China reveals niche sparation between species in utilizing soil resources.