Human activity is creating the sixth species extinction event in Earth's history. Mankind will lose significant bio-diversity in the span of three human lifetimes. See a summary here: http://www.csmonitor.com/Science/2015/0620/How-to-prevent-the-sixth-mass-extinction
This is further documentation of the effects of human activity on our ecosystem. '...current species extinction rates are 10 to 100 times faster than previous estimates,' stated in http://www.csmonitor.com/Science/2014/0529/Extinction-rates-higher-than-thought-but-not-all-gloom-and-doom
At some future time, the species likely to go extinct will be the human species.