Biodiversity

Geography and Environment (CSC)

Title

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Which of the following criteria are used to identify biodiversity hotspots?

1. Species richness

2. Presence of invasive species

3. High endemism

4. Threat perception

Select the correct answer using the code given below.

1 and 2 only

2 and 4 only

1, 3 and 4 only

1, 2, 3 and 4

Conservation International was a pioneer in defining and promoting the concept of hotspots.
In 1989, just one year after scientist Norman Myers wrote the paper that introduced the hotspots concept, Conservation International adopted the idea of protecting them as the guiding principle of their investments.
Hot spots are regions with very high levels of species richness and a high degree of endemism (that is, species confined to that region and not found anywhere else) that are under constant threat.
To qualify as a biodiversity hotspot, a region must meet two strict criteria: o It must have at least 1,500 vascular plants as endemics — which is to say, it must have a high percentage of plant life found nowhere else on the planet.
A hotspot, in other words, is irreplaceable.
o It must have 30% or less of its original natural vegetation.
In other words, it must be threatened.
The mere presence of invasive species is not a criteria to identify biodiversity hotspots.
Hence option (c) is the correct answer.