Harvey: All of the discussion I have seen is secondary sources, no authority cited, so I won't even bother with links, with the exception of the following. I do not have access to the full article:
Article http://www.els.net/WileyCDA/ElsArticle/refId-a0001825.htmlBut I quote from the abstract:
Thermoregulation in Vertebrates: Acclimation, Acclimatization and Adaptation
John R Speakman, University of Aberdeen, Scotland, UK
Published online: April 2001
"Environments vary enormously in the thermal challenge they impose on the organisms that live in them. Some of these changes occur over very small temporal and spatial scales, and animals respond to these changes by acute modulations of their behaviour and physiology. More chronic changes in thermal environments, such as seasonal changes and latitudinal changes across the globe, require different responses. Three types of response have been recognized in both exothermic and endothermic vertebrates. These are termed acclimation, acclimatization and adaptive responses."
The third is clearly a long term genetic selection response. All are couched in terms of environment, and apparently deal with the single factor of temperature, so your guess is better than mine as to what the distinction might be.
