Question

Explain the classification of biodiversity on the basis of IUCN? (6 MARKS).​

Answer 1

Answer:

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Answer 2

The IUCN Red List of Threatened Species is  recognised as the most  objective, comprehensive, global approach for assessing the conservation status of animal & plant species.

Explanation:

The classification is as follows

Critically Endangered: The IUCN 's highest level of concern for wild species is critically endangered. Critically endangered species implies that within three generations the number of species has decreased or would be decreased by 80 per cent. The risk of extinction in the wild is therefore considered exceptionally high in this category.

Endangered: Endangered (EN) species is an organism population at risk of extinction because they are either low in numbers or endangered by increasing environmental changes or predatory circumstances. Endangered species may also mean a shortage of food and/or water due to deforestation can result in species being endangered. Therefore the danger of the extinction in the wild is perceived to be very high

Vulnerable: This is a species that unless the situations threatening its survival & reproduction change, is considered likely to be endangered by the IUCN. The risk of its extinction in the wild is thus deemed to be high.

Extinct: When the last surviving member of this species dies, a species is said to be extinct. Thus the extinction is an assurance that there are no living individuals that can create & reproduce to make up a new generation

Functionally Extinct: Only a few individuals that cannot reproduce because of age, poor health, sparse distribution over a wide range, a shortage of both genders, or other causes can functionally extinct a species.

Extinct in the Wild:  These species do not have any living/surviving specimens in the wild & only in zoos or some other artificial environment these species are preserved. A few of these species are functionally extinct; since they are no longer in their natural habitat, it is difficult to restore the species to wild