If you mean variation development as in a genetic mutation within a certain species, it can have a very significant effect on that species. genetic mutation is the first step to Darwin's theory of evolution and survival of the fittest. Because of the mutation that occurs within an animal of the species, it will have the potential to either die quickly because of it, or outlive its fellow animals, because it's mutation was actually beneficial to its survival, such as a bird obtaining a different shaped beak and therefore being able to obtain more food in its habitat than the others. The bird with the mutated gene, having outlived some of the non-mutated bird, will then reproduce to breed more birds with changed-beaks--as the cycle goes on, the species changes to adapt to its surroundings through many hundreds of generations of offspring and therefore forming the species to its environment and even, potentially creating a whole new species. Overall, variation development helps a species survive and grow to best fit their environment and their needs as a species to survive and reproduce.
Human species, as in the variation in height.
Variation of a species can come about in many ways, but mutation is the major cause of variation in a species.
It can effect them because, they wont have a home because someting is being made or built.
Genetic variation, which can lead to evoloution, and then potentially a new species.
Intraspecific variation
Sometimes positive variation can improve some ability of the species adapted to the environment. For example, a kind of virus can be killed by medicine A. A small part of the virus has some variation that make it can be alive with medicine A. The species of the virus can exist in future, or it will disappear in the future in the environment full of medicine A. Besides, positive variation can provide some capacity for the species to get more resource in the competition. Of course, there is negative variation that might contribute to the disappearance for the species. That is just another side of variation.
Sometimes it is very hard to distinguish between a species where there is a lot of variation between that of a variation that is actually two separate species. Many times scientist disagree on how to tell these two things apart.
Charles Darwin wrote a book called On the Origin of Species, in which he explained his conclusions that 1) modern species derived from ancestors they share with other species, and 2) that the driving mechanisms behind this development is reproductive variation and natural selection.
Within a species, the animals breed together so that the similar characteristics are passed from parents to their offspring. This is why there is less variation within a species than between a species.
Gentic variation is mearsured by the number of species in the given area not.
variation
it is the environment. environment is the key point to effect the species' development.