A relatively small area with an exceptional concentration of species. bioenergetics The study of how organisms manage their energy resources. biogeochemical cycles[Gk. bios, life + geo, earth + chemeia, alchemy; kyklos, circle, wheel] The various nutrient circuits, which involve both biotic and abiotic components of ecosystems.

a biogeographic region that is both aFind thousands of free online definitions and reference guides at TheFreeDictionary

an area that contains a large or uniquely different collection of species that require preservation

a region where large numbers of species are endangered or threatened by human activity

A biodiversity hotspot is a biogeographic region that is both a significant reservoir of biodiversity and is threatened with destruction. The biodiversity hotspots were originally identified by Dr. Norman Myers in two articles in The Environmentalist (1998 & 1990) and revised in an article in the journal Nature (2000).