Aquatic ecosystems share a number of basic structural and functional characteristics with terrestrial ecosystems . 水生生态系统的结构和机能，在许多基本特征方面同陆地生态系统一样。
We tend to distinguish one ecosystem from another according to the most apparent features of its biological components . 我们往往根据其中特征最明显的生物成分来区分不同的生态系统。
Forest ecologists have been more concerned than agronomists with the inner mechanisms of natural and artificial ecosystems . 森林生态学家比农学家更关心天然生态系统和人工生态系统的内部机制。
Perhaps one could roughly state that the concept of the genetic system is the counterpart of the concept of the ecological niche . 人们可能会粗略地说，遗传系统的概念是生态小生境概念的副本。
