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What is refugia hypothesis

The rise and fall of the Refugial Hypothesis of Amazonian speciation

keywords Deep coral reef Refugia. Comments powered by Disqus. Volume 29, pp 309-327 First online: Rent administrator the article at a discount. Mesophotic Global climate change Disturbance Communicated by Guest Editor Dr. Rent now Final gross prices may vary according to local. Issue 2, john Marr. Look Inside Get good Access Find out how to access preview-only content. Review Coral effectiveness Reefs June 2010,

What is refugia hypothesis

Colinvaux has his widespread forest continuity and significant glacial-stage temperature decreases; the refugialists have their Pleistocene diversification and a likely significant interglacial drying. Haffer and his supporters, along with Colinvaux and his, have advanced our understanding of the history. But in setting the record straight on a flawed thesis, has Colinvaux gone too far the other way? He insists that the Amazon's lowland rain forest has persisted uninterrupted since well before the Pleistocene "in all the places where. Recounting these experiences with wry humor, ample ego and his signature enthusiasm, Colinvaux is at his best. The beautiful theory he sought to disprove was the refugia hypothesis, put forward by Jürgen Haffer. In an article in the July 11, 1969, issue of. Science, Haffer theorized that during several dry climatic periods of the Pleistocene and post-Pleistocene, the Amazonian forest was divided into a number of smaller forests which were isolated from. This rupturing and rejoining of the various forests in Amazonia probably was repeated several times during the Quaternary and led to a rapid differentiation of the Amazonian forest fauna in geologically very recent times. Their disputes focus on the ages and locations of refugia, not the very existence of the refugia. Unfortunately, paleoclimatic studies of the neotropical Pleistocene have produced less-definitive results than have similar studies in Africa. The remaining forests served as "refuge areas" for numerous populations of forest animals, which deviated from one another during periods of geographic isolation. The isolated forests were again united during humid climatic periods when the intervening open country became. Of course, in the days before satellite imagery was widely available, finding lakes in the dense rain forest was not easy. Reaching these lakes with heavy coring equipment was even more challenging.

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What is refugia hypothesis
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