Estuary :D

An estuary is a semi-enclosed body of water found between rivers and oceans. It is where saltwaters meets freshwater. Because of the several amount of species living on this ecosystem, we can find lots of flows, storages, sinks and transformations of energy. An example of this could be seen in both pyramids presented below.

Thie yellow pyramid shows the biomass existing on a foodchain of the Estuary, and how it decreases as the trophic level increase.  In the green pyramid we can appreciate how in the same food chain the energy is passed and lost trough trophic levels.