Pleistocene refugia

John Grehan jrg13 at PSU.EDU
Fri Jan 15 13:42:58 CST 1999


Added comment to that by Joseph Kirkbride Jr. on the work by Paulo Oliveira
that refutes the forest refuge hypothesis for the eastern Mina Grais.

The refgia hypothesis has gained much of the currency regarding historical
origins of the modern biota in S America, but there has also been the other
tradition supporting the view that modern distributions in the region were
not totally disrupted Pleistocene events, but refelct earlier ancestral
Tertiary and
even Mesozoic patterns.

Three of relevant papers are:

Croizat, L. (1958) Panbiogeography. Published by the author, Caracas

Cracraft, J. (1985). Historical biogeography and patterns of
differentiation within the South American avifauna: areas of endemism.
Ornithological Monographs 36, 47-84

Bush, M. B. (1994). Amazonian speciation: a necessarily complex model.
Journal of
        Biogeography 21: 5-17

There are also some molecular clock studies with similar implications.

This topic is briefly considered in the context of the general issue of
Pleistocene
influences on biogeography in "Panbiogeography: tracking the history of life"
(March 1999 approx).


John Grehan




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