critically endangered species of flora and fauna of Chattisgarh
plz answer it in brief
Answers
Answer:
To be defined as critically endangered in the Red List, a species must meet any of the following criteria (A–E) ("3G/10Y" signifies three generations or ten years—whichever is longer—over a maximum of 100 years; "MI" signifies Mature Individuals):[6]
A: Population Size Reduction
The rate of reduction is measured either over a 10 year span or across three different generations within that species.
The cause for this decline must also be known.
If the reasons for population reduction no longer occur and can be reversed, the population needs to have been reduced by at least 90%
If not, then the population needs to have been reduced by at least 80%
B: Reduction Across a Geographic Range
This reduction must occur over less than 100 km2 OR the area of occupancy is less than 10 km.
Severe habitat fragmentation or existing at just one location
Decline in extent of occurrence, area of occupancy, area/extent/quality of habitat, number of locations/subpopulations, or amount of MI.
Extreme fluctuations in extent of occurrence, area of occupancy, number of locations/subpopulations, or amount of MI.
C: Population Decline
The population must decline to less than 250 MI and either:
A decline of 25% over 3G/10Y
Extreme fluctuations, or over 90% of MI in a single subpopulation, or no more than 50 MI in any one subpopulation.
D: Population Size Reduction
The population size must be reduced to numbers of less than 50 MI.
E: Probability of Extinction
There must be at least a 50% probability of going extinct in the wild within over 3G/10Y
Explanation:
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