"As elephants go, so go the trees: Research shows hunting can have catastrophic effects on tropical forests":
"GAINESVILLE, Fla. --- Overhunting has been disastrous for elephants, but their forest habitats have also been caught in the crossfire. A first-of-its-kind study led by researchers at the University of Florida shows that the dramatic loss of elephants, which disperse seeds after eating vegetation, is leading to the local extinction of a dominant tree species, with likely cascading effects for other forest life..."
http://news.ufl.edu/archive/2014/11/as-elephants-go-so-go-the-trees-research-shows-hunting-can-have-catastrophic-effects-on-tropical-forests.html