Aquatic Biodiversity

An Indicator of an Ecosystem's Health

Ocean Diversity

There are several zones in the ocean. These include the intertidal zone, the continental shelf, and the oceanic zone which has the photic zone, the aphotic zone and the abyssal zone.

Lake Diversity

There are fewer zones in a lake than in the ocean, some of which are the same. The zones are the littoral zone, the limnetic zone and the profundal zone which has the photic and aphotic zones.


Biodiversity is an indicator of ecosystem health as an ecosystem is healthier with more types of organisms. Every ecosystem is a complex set of organisms that are connected to the lives of the other organisms within the ecosystem. When one organism is removed from the ecosystem, regardless of its size, some of the remaining organisms might suffer, while others might thrive.