All About Biological Sciences

Encompasses the Biological World

Biodiversity in Danger

Natural ecosystem have a vast amount of genetic diversity, yet researches have strong evidence that ecosystems are in the opening stages of an extinct episode. There is a pronounced and sudden decline in the worldwide abundance and diversity of ecologically different groups of organisms, particularly those  in topical rain forests. Such a rate of extinction is the most extreme in the past 65 million years. Some researchers estimate that at the current  rate more than one million species may become extinct by the end of this century.
All organisms on earth including humans are dependent on each other. The interplay between biotic  and abiotic factors makes possible the diversity of organisms that exist today.
The primary cause of this decline in diversity is not direct human exploitation but the habitat  destruction that results from the expansion of human populations and activities. As the human population grows it places greater demands on the ecosystem for space and goods. As a result land is cleared for cultivation and living space, destroying the habitat of many organisms.
Organisms require appropriate habitats if they are to survive. Just as humans cannot live in an atmosphere with too little oxygen, trout cannot breed in water that is too warm ot too cold birds must eyed vireos, scarlet tanagers and other birds must have mature tropical forest in which to spend the winter. Black footed ferrets require  prairie that still supports prairie dogs, their major source of food.
Although many organisms  provide humans with  crops, domesticated animals, industrial  products, and medicines , the roles that microorganisms, plants  and animals play within the natural ecosystem are more important. All these organisms  exchange gases with the environments and thus help to maintain the mix  such as increases in carbon dioxide, nitrogen oxides and methane may lead to rapid climatic change and agricultural disaster.
The extent to which humans have devastated the diversity  of organisms  and the effect this devastation will have on the ecosystem of the world  are as yet undetermined. Currently  however, procedures to alleviate some of the problems are more  widely practiced than ever before. Some of these procedures require a change in life style. People  are learning to recycle aluminum, plastic, paper and glass and to refuse to purchase items intended to  be used only once and then thrown away. Other procedures involve new techniques to perpetuate diversity such as embryo transplants between an endangered species and a domestic species. In the months and years to come, researchers will continue to develop new techniques and  products to help alleviate the human pressure on natural resources and to create a sustainable earth economy.
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