Biodiversity, aka Biological Diversity is the total variety of all species in any given area. It is a very valuable means of measuring the health of that natural area.

 

Biodiversity conservation is the practice of protecting and preserving the abundance and variety (biodiversity) of all species, regardless of classification, ecosystems, or genetic diversity on the planet (wiserearth.org).

 

An ecological inventory is designed to determine those skills needed by a particular individual in his or her current and future environment.