A team of biologists convened by the World Wildlife Fund -LRB- ORGANIZATION@1 -RRB- developed a system of eight biogeographic realms -LRB- ecozones -RRB- as part of their delineation of the world 's over NUMBER@1 terrestrial ecoregions .

A team of biologists convened by the World Wide Fund for Nature -LRB- ORGANIZATION@1 -RRB- developed a system of eight biogeographic realms -LRB- ecozones -RRB- as part of their delineation of the world 's over NUMBER@1 terrestrial ecoregions .
