It might seem a bit unusual that the richest concentration of marine life is (1) in the very margins of the oceans, where condit
ions are the least stable; and (2) in colder water, which seems less conducive to a good life. What factor(s) provide an explanation of these observations?
Climate change is one factor that causes migration of marine life from tropic water to colder water due to global warming in search of warms around them. This animals are moving towards the poles to escape the heat.
Climates changes is also a factor that affect ecosystem of marine animals along the ocean/continent margin. As global temperature increases, sea level rises and currents will be affected pushing nutrient to the shores of oceans.
Dissolved oxygen , As temperature increases the solubility of oxygen decreases. Therefore, dissolve oxygen is more present in colder water than warm water. The abundant availability of dissolved oxygen thereby drives marine animal to colder water.
