Answer:
Species diversity decreases as we move
towards the poles, because
(i) Temperature decreases and conditions
become harsh.
(ii) Both the amount and
intensity of solar radiation decreases.
(ii) Vegetation decreases.
(iv) Less resources available to
support species.
Speciation is generally a
function of time and environmental stability, so if conditions are too harsh,
it is difficult for the species to survive and adapt. This results in decrease in
biodiversity towards the poles.
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