Historical biogeography important facts

Added: 06/16/2006

You might find it interesting to know more about biogeographic changes taking place nowadays. Like any sphere of life on Earth those changes are tightly connected to geographical conditions. Let us see what actually the biogeography is. A historical aspect of this science, certainly, helps understand the majority of changes the biogeography comes across.

The very definition of historical biogeography tells us about the aim of this study. Historical tendencies in any sphere of life are always useful to know the possible future and help avoiding dangerous global mistakes. The key point of history lies in understanding the principles of this or another creature action, the historical biogeography, in its turn, differs from the last term only with the factors, which do not always depend on creatures, actually. As you may already guess, those factors depend on planetary changes, including nature global factors like moving shelves, global warming and cold and even meteorites' falling, in its turn possible to cause all the enumerated factors. Since there is no sense in talking about the end of the world until that day comes, you can try to understand what makes the life endangered and see the reasons of new species appearing.

The Biogeography is the very science, attempting to document and understand spatial patterns of biodiversity. This study of distributions of organisms, both past and present, and of related patterns of variation over the earth in the numbers and kinds of living things is vital not to influence, but observe and make the right conclusions about the situation on Earth as a whole.

The historical biogeography deals with living things; it is not an experimental science yet, but a comparative observational science. Evolution, extinction and dispersal are the major processes considered by the historical biogeography. While the evolution shows any irreversible change in the genetic composition of a population, the extinction describes the process of a species becoming permanently disappearing with no more living individuals on Earth. The dispersal is also not a rare thing taking place, when the organisms move away from their origin location.

A person, taking a deep concern in the historical biogeography, often deals with theories, developed by searching for patterns. Formulating theories, testing assumptions and predictions of new observations, you can try to find the reasons of life as a whole finally. Taking a closer look at nature's experiments allows to understand why a species prefers to live where it does, what prevents if from colonizing other areas, why the animals and plants of large, isolated regions are so distinctive and why the number of species in the tropics is greater than at temperate latitudes.

Minding the above said once you can easily imagine the factors, influencing the evolution, extinction and dispersal of the species, which concerns not only animals, but also plants. Scientists of these spheres study distributions of plants and animals in relation to their physical environment, historical biogeography attempts to reconstruct the origin, dispersal and extinction of taxa and biotas.

One more factor of nowadays as well as it used to be long ago is vitally important for living the world of Earth. This factor is humanity, and, unfortunately, it seems to affect life around us reasonably more than any of a possible factor created in nature. It is evident that the human activity leads to the self destruction, while the nature is able to regenerate itself when untouched. Even if natural cataclysms used to delete the species, human weapons seem to be much more aggressive.

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