Heat and cold not only influence the beings that live on land and sea surfaces, but also have an important effect on those that inhabit the ocean floor . However, in water changes take longer to be noticed, because in this medium the temperature changes less and more slowly than on land, which delays the advance of oceanic seasons.
However, during winter and summer, the large thermal differences between the surface and the bottom cause aqueous layers to form that do not mix with each other, due to their different density. In these times, the nutrients are trapped near the bottom, where the light does not reach. In contrast, in the warmer periods of spring and autumn, the waters mix again, and food abounds on the surface, which, together with sunlight, allows the algae that form phytoplankton – the microorganisms that make photosynthesis. – grow as fast as its terrestrial neighbors.
Also with the rise in water temperature, some species, such as jellyfish "come up" and their presence is notorious. When they are abundant, it is a sign that there has been a thermal rise. Rising ocean temperatures are also affecting the biodiversity of the seas.
