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Is this statement applicable to any known plant/region combinations?

Plant species X, Y, and Z are truly indigenous to region R. Other "immigrant" species can be destroyed by drought or harsh weather, but these species will always be part of the region R.

(all species in question are "benign" - like wheat; please disregard climate change and other global disasters like nuclear wars).

PS. Background: I heard this statement (with specific X,Y,Z,R) attributed to a "leading botanist" (probably 20th century), but I don't really see how this can be true (my biology education ended in high school though; I am a mathematician by training).

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closed as unclear what you're asking by rg255, Bez, AliceD, The Last Word, WYSIWYG Dec 16 '14 at 17:24

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ What is your exact question? $\endgroup$ – Chris Dec 15 '14 at 18:43
  • $\begingroup$ @Chris: "Is this statement applicable to any known plant/region combinations"? $\endgroup$ – sds Dec 15 '14 at 18:49
  • $\begingroup$ @sds You should probably edit the question to put that directly in the question itself. Also, this seems to assume the foreign plant comes from a region significantly different from R and can't kill off the native plants before bad weather kills off the foreigner. Also assumes native plants will always be able to survive extreme conditions in the region, but with climate change, the region could change beyond what native plants can handle. $\endgroup$ – user137 Dec 15 '14 at 19:09
  • $\begingroup$ @user137: this phrase is the first line of the question! $\endgroup$ – sds Dec 15 '14 at 19:16
  • $\begingroup$ @sds Sorry, I must not have seen it, I think I was looking for a question mark. $\endgroup$ – user137 Dec 15 '14 at 19:19

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