What are the reasons for greater biodiversity in the tropics ?

Explanation

Reasons for greater biodiversity in the tropics :
Reasons 1: Tropical latitudes have remained relatively undisturbed for millions of years and thus had a long .evolutionary time.. As long duration was available in this region for speciation, it led to the species diversification. (Note : The temperate regions were subjected to frequent glaciations in the past).
Reason 2: Tropical climates are relatively more constant and predictable than that of the temperate regions. Constant environment promotes niche specialization (how an organism responds, behaves with environment and with other organisms of its biotic community) and this leads to greater species diversity.
Reason 3: Solar energy, resources like water etc., are available in abundance in this region. They contribute to higher productivity in terms of food production, leading to greater diversity.