Which of the following statements regarding the phenomenon of "Tropicalization" is not true ?
1
Tropicalization refers to the movement of tropical marine species towards the poles as sea temperatures rise.
2
The phenomenon has first been identified in the Mediterranean Sea, which is now considered a "tropicalization hotspot".
3
An increase in seawater temperature has facilitated the strengthening of warm-water boundary currents, aiding the polarward movement of tropical species.
4
Tropicalization predominantly leads to cooling of sea temperatures causing the movement of temperate species towards the poles.