Forest Core: A forest core is an area or patch of relatively intact habitat that is sufficiently large to support more than one individual of a species. Consider that the greater the number of interior species present and the greater the diversity of habitats, the more important it is to conserve the core intact.
Forest Edge: The transitional boundary of a core, where the vegetation assemblage and structure differs markedly from the interior. The structural diversity of the edges (with diferent heights and types of vegetation) affects its species diversity, as well as the prevalence or abundance of native or invasive species.