What is species based approach of conserving biodiversity? Also give its disadvantages
There is no global consensus as to what constitutes an important species, but species may be singled out for conservation action if they fall into one or more of the following categories:
- Threatened species
- Ecologically important species
- Species useful to humans
- Species with non-use value.
Threatened species
Threatened species are those that are believed to be in danger of extinction. Threatened species listing systems, such as the US Endangered Species Act and the IUCN system, give clear guidance as to which species are believed in most urgent need of conservation action. But the guidance is incomplete because only a small proportion of the world's species has yet been assessed in terms of extinction risk. Information is most complete for birds and mammals and is very incomplete in most invertebrate and plant groups.
It is widely agreed that it is unrealistic at present to expect concerted conservation efforts to be undertaken for each of these threatened species individually, but there is not much agreement
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