A barrier runs through it... or maybe just a river.

نویسنده

  • R K Colwell
چکیده

During my residence in the Amazon district I took every opportunity of determining the limits of species, and I soon found that the Amazon, the Rio Negro and the Madeira formed the limits beyond which certain species never passed. The native hunters are perfectly acquainted with this fact, and always cross over the river when they want to procure particular animals, which are found even on the river’s bank on one side, but never by any chance on the other. On approaching the sources of the rivers they cease to be a boundary, and most of the species are found on both sides of them.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 97 25  شماره 

صفحات  -

تاریخ انتشار 2000