Range: the area of variation between upper and lower limits on a particular scale. 

Essential: absolutely necessary; extremely important. 

Varied: incorporating a number of different types or elements; showing variation or variety. 

Aquatic: relating to water (animals,plants,bodies of water, etc)

Apex Predator: a predator that exists at the very top of the food chain 

Locally: in a particular place, area, location, etc. with regard to place.

Deforestation: the purposeful clearing of forested land

Adaptation: special body parts or behaviors that help a living thing survive in an environment