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中文摘要：
适应度和生态位适应度既有相似性也存在区别，该文在综述两者概念的基础上，利用生态位中心、实际生态位和生态位宽度构建生态位适应度，分析两者存在的关系．结果发现生态位适应度和适应度具有一定的相关性，幼苗的生理特性可以用于表征物种在演替过程中的适应度，但是生态位适应度的动态提前于适应度的动态；同时利用限制因子构建的生态位适应度模型可以了解演替过程中影响物种演替的限制因子．该文的研究提供了一种利用物种生理特性定量研究演替过程中物种适应度动态的方法．
英文摘要：
Fitness is different from niche fitness, but they still have some comparability. Based on reviewing the boih conceptions, the authors mend niche-fitness function by using the methods of niche center, niche breadth and environments variable, thus to analyze the relationship between them. The results show that, 1 ） the niche-fitness is relative to niche in a certain extent, and since niche-fitness is advanced to fitness, the physiology characteristics of plant seedlings could be used to construct niche-fitness as the index of fitness dynamic in the succession. 2） With the model built on the limitation factors of niche-fitness function, the limitation factors affecting the stages of species succession could be found out. The purpose of this work is to provide a new quantitative method to study the variation dynamic in the process of succession based on species＇ physiological characteristics.
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