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answered by ELITE (3,032 points) 5 21 40

The Convention on Biological Diversity (CBD) defines biological diversity as the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and ecosystems. Hence, a country or a region becomes biodiverse, when it contains much of the world's species (endemicity)--be it in terms of genetic, habitat or species diversity. In essence, it then becomes a biodiversity hotspot when it has lost or continuously loses its biodiversity.

To date, approximately 1.5 million species have been named, but there are more still unnamed and undiscovered. This concerns one of the questions I've posted here (What do you think will happen to biodiversity in the next 50 years) because if majority of the species remains unaccounted, then we might not even know what we are losing or worse have already lost them before we even discover them.

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answered by LEGEND (6,006 points) 5 9 19
Biodiversity is simply the variety and variability of organisms at the genetic, specific and ecosystem level. There is a good number of biodiversity hotspots across the world. The thing that defines biodiversity hotspots is the fact that they are home more than half of the world species including reptiles, mammals, birds and amphibians put together. They also have lost more than 70percent of their endemic species.
Note that endemic species are species that are unique to that particular habitat and are not found elsewhere. Some studies say that biodiversity hotspots need to have about 1500 endemic species to be qualified as hotspots. Hotspots have not just lost those species, it is a continuous process and still they remain the richest regions in terms of diversity.
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answered by LEGEND (6,076 points) 6 9 22
Basically, a certain habitat for dwelling of organisms can be regarded as biodiversity hotspot when there is large amount various organisms in one place. In other words, the habitat would be steaming with orgainisms that are of different species. There are instances where a particular habitat is predominately dominated by one onrganism, but biodiversity hotspot is not like that.

Another noticeable characteristics of biodiversity hotspot is the rate of competition among the diverse organisms. The habitat would be governed by the law of survival of the fittest, as each organism would have to fight for every available resources for them to survive. It's obvious that the weaker organisms would be preyed upon by the much stronger ones, which are the predators.
For instance, lion will eat up the antelope, just as the snake will eat up rabbit. This will also make the tolerance among the organisms to be very low, as they would find it difficult to coexist together in competitive habitat.
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answered by ELITE (3,210 points) 4 8 18
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As we all know, biodiversity is not evenly distributed around earth due to two major factors, climate and primary production. If we are able to categorize biodiversity with these two factors, then we'll definitely come up with an almost perfect hotspot for biodiversity.

Climates are mostly categorized in warm and cold. It's most likely you'll find abundant terrestrial biodiversity in the equatorial regions due to it's warm climate and active reproductuons. Remember they aren't evenly distributed, so the major hotspot for terrestrial biodiversity will be the tropical regions due to changing climates which sustains more life and aid the process of productivity.

As stated above with warm climates, same goes for cold climates too in relation to biodiversity, especially aquarterrestrial lives. These are life forms drawn to colder regions, so it's only right for them to be abundant in cold places where the function the best.

Drawing from all, biodiversity are scattered all around the earth and picking certain hotspots will be determined on the factors mentioned above.

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