Leaving Islands Of Protected Forest Does Not Conserve Biodiversity

Biodiversity can only be conserved when tracts of land are interconnected and remain free from human encroachment.  Reports show that species diversity declines even in pockets of forest that are untouched and have intact canopies.  The effect of the surrounding agricultural fields and human activity are profound.  Since there is no refuge and no place to retreat, species diversity suffers.  Seed banks and populations are weak and fragile.

http://www.sciencedaily.com/releases/2012/08/120814213404.htm