【托福阅读题型：Ecosystems句子简化题】托福阅读中句子简化题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

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　　托福阅读句子简化题：Ecosystems

　　【Paragraph 7】Many ecologists now think that the relative long-term stability of climax communities comes not　from diversity but from the “patchiness” of the environment, an environment that varies from place to place supportsmore kinds of organisms than an environment that is uniform. A local population that goes extinct is quickly replaced by　immigrants from an adjacent community. Even if the new population is of a different species, it can approximately fill the　niche vacated by the extinct population and keep the food web intact.(The Long-Term Stability of Ecosystems)

　　Which of the sentences below best expresses the essential information in the highlighted sentence in the　passage? Incurred choices change the meaning in important ways or leave out essential information.

　　○Ecologists now think that the stability of an environment is a result of diversity rather than patchiness.

　　○Patchy environments that vary from place to place do not often have high species diversity.

　　○Uniform environments cannot be climax communities because they do not support as many types of organisms　as patchy environments.

　　○A patchy environment is thought to increase stability because it is able to support a wide variety of organisms.