Exotic species and its impacts on natural forest areas (ecosystems). Introduction of Genetically modified organisms and its impacts on natural ecosystem. Loss of biodiversity due to exotic species and genetically modified organisms.
A genetically modified organism is an organism, in whose chromosomes a foreign gene, taken from an organism of a different species, is inserted ………..
Introduction of exotic species and genetically modified organisms destroy the natural ecosystem. Species whose origin is in other geographic areas and that therefore have not adapted, through the long natural selection processes, to the new environment in which they are introduced is called exotic species. It has been calculated that extinction of birds and mammals is due to the direct action of animals introduced by man. The reason for this extinction can be attributed to various causes: to competition for limited resources, to predation by the “new” species, to the diffusion of new diseases and to the damages that the species that have been introduced can cause to the natural vegetation, to the cultivations and to zoo technics.
The loss of biodiversity is to be attributed to the introduction in the environment of genetically modified organisms that are also known as transgenic organisms. A genetically modified organism is an organism, in whose chromosomes a foreign gene, taken from an organism of a different species, is inserted with genetic engineering techniques. In this way it is possible to create a new organism with particular desired characteristics. Some organisms of the vegetable kingdom may become more resistant to herbicides or harmful insects; some livestock animals become more productive or more resistant to infections. With regard to the potential harmfulness of the genetically modified organisms there is a violent debate between those who believe that the advantages for medicine and for society are greater than the possible effects on the environment, and those who state that too little is known to be able to use them, and that the environment will feel the effect of the genetic pollution of the natural species with numerous consequences: the involuntary transmission of resistance to herbicides in infesting plants, the evolution of more resistant parasites, the increased use of herbicides, the disappearance of species of insects and as a consequence the loss of biodiversity.