Biodiversity is mostly a bunch of  propaganda goop aimed to put limits on human harvest of wildlife resources to that wealthy Westerners can "view" them in an outdoor zoo off limits to traditional use.  There is little real unaltered science to support it as the earth it almost totally altered and changed by human activity.  Mono cultures are the norm on most of the planet for many years now.  In the 3rd world there is little bio mass near human overpopulation because the humans are forced to consume it all.  Humans there are being actually forced to have less food resources because of western bio meddlers with their mentalities formed and honed by the likes of Ranger Ricks.  Humans are actually suffering there because of the "golden calf " wildlife biology mind set that has infected mostly urban bio university departments.  I get sick when I see westerners with their Green Peace whaling criminal enforcement ships harassing Japanese whalers.