Compare the productivity of terrestrial and aquatic ecosystems against the percent of earth’s surface area they occupy..

It is estimated that around 2/3 (72%) of the Earth's surface is covered by water, in which the aquatic ecosystems are present. The aquatic ecosystem supports almost 1/3rd of the primary productivity.

The lands are present in 28% of the earth surface, but the number of producers present  on the land accounts for almost 2/3rd of the total primary productivity. Hence, it can be said that the terrestrial ecosystems have more productivity than the aquatic ones.

and after water is usually warmed by the sun the water temperature raises and then evaporates .