By A. A. Myers, P. S. Giller (auth.), Alan A. Myers, Paul S. Giller (eds.)
Biogeography will be outlined easily because the learn of the geographical distribution of organisms, yet this straightforward defmition hides the good complexity of the topic. Biogeography transcends classical topic components and consists of quite a number medical disciplines that incorporates geogra phy, geology and biology. no longer strangely, for this reason, it potential really various things to diversified humans. traditionally, the examine of biogeogra phy has been targeted into cubicles at separate issues alongside a spatio-temporal gradient. At one finish of the gradient, ecological biogeography is worried with ecological methods taking place over brief temporal and small spatial scales, while on the different finish, historic biogeography is anxious with evolutionary strategies over thousands of years on a wide, usually international scale. among those finish issues lies a 3rd significant compartment serious about the profound results of Pleistocene glaciations and the way those have affected the distribution of modern organisms. inside each one of those cubicles alongside the dimensions gradient, plenty of theories, hypotheses and types were proposed in an try to clarify the current and prior biotic distribution styles. To a wide quantity, those cubicles of the topic were non-interactive, that's comprehensible from different pursuits and backgrounds of some of the researchers. however, the distribu tions of organisms around the globe can't be absolutely understood with out a wisdom of the whole spectrum of ecological and ancient methods. There are not any levels in biogeography and at the present time' s biogeographers are basically born out of a few different discipline.
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Extra info for Analytical Biogeography: An Integrated Approach to the Study of Animal and Plant Distributions
Mention of particular ideas is not meant to indicate that I personally prefer or accept them, nor is it a comment on their rigour, testability or general acceptance. I have not attempted to discuss inconsistencies between the various ideas, nor to make more than passing critical comments on them, even though some have received telling criticisms. I have offered critical comments on the methods and patterns used to reconstruct earth history in Chapter 14. 2 Biogeographical processes Earlier, I drew a distinction between pure and applied biogeography.
We can suppose that a biogeographical system exists as an entity, comparable with, say, a physiological system. We do not yet know much about the processes involved, but we can envisage that these processes operate at different levels. I base this idea on Valentine's (1973) use of biological'levels', Riedl's (1978) ideas about hierarchies in living systems, and on Young's (1971) conception of evolutionary processes as just one extreme of the homeostatic continuum which characterizes living things.
It does not follow however that every environmental factor has a geographical dimension, and extension of ecological processes on a geographical scale may in itself be hypothetical. Vermeij (1978), for example, has argued in favour of geographical variations in processes like predation, grazing and competition. It is useful to distinguish the geographical-scale extension of ecology from the ecological processes themselves, by referring to it as geoecology, especially in the applied context of using biogeography for palaeogeographic purposes (Chapter 14).
Analytical Biogeography: An Integrated Approach to the Study of Animal and Plant Distributions by A. A. Myers, P. S. Giller (auth.), Alan A. Myers, Paul S. Giller (eds.)