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Around the world, once-giant ecosystems have been cut up into tiny fragments. Islands of habitat have been left on the land that can be wiped by a single storm.

"large animals were once ubiquitous across the globe. They shaped the structure and dynamics of ecosystems. Their decline, largely caused by humans through hunting and habitat fragmentation, has far-reaching and often surprising consequences, including changes in vegetation, wildfire frequency, infectious diseases, invasive species, water quality and nutrient cycles."

I've got a pdf file of the actual article from 7/15 Science. Let me know and I'll gladly e-mail a copy to anyone interested.