Classic quotes – Tansley 1904

“… Thus many great families [of plants] are exclusively tropical and subtropical […] There is no reason to assume that there is anything inherent in the constitution of the members of many of these families which prevents their spreading into those regions of the earth where they are not in fact found. We must rather suppose that having first appeared and obtained a footing in a certain region they have either not as yet had time to spread out of those regions, or (and this is probably the explanation in the majority of cases) they have failed to widen the limits of their distribution owing to the competition of the occupants of the other regions of the earth.”

From: Tansley, A. G. (1904) The problems of ecology. New Phytologist, 3, 191-200.

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