there is no "special" species. none are better than any others.
All species have different attributes that make them more/less likely to survive and flourish in any particular environment/ecosystem.
human intelligence is grand at the moment, but not in all environments. Take two posters of this thread and drop them off in the arctic circle with a polar bear. Who do you think is going to survive and flourish? Human intelligence is worth jack shit unless in an environment supplying tools for the humans to use by putting that intelligence to use.
our intelligence is actually working against the longevity of our species. As our societies get more technological, fundamental survival skills are lost. If a global catastrophe were to render our technology moot, our species would dwindle to extremely low numbers. Even if the environments and ecosystems remained the same, humans have lost survival skills. We still have the instincts...eat...drink....reproduce. The problem arises when the human doesn't know how to hunt food to eat......or find fresh, uncontaminated water to drink to keep them alive to reproduce. In that scenerio, the members of undeveloped countries would be the most likely survivors. The people who's idea of eating dinner is going out and killing something, not going to Kroger with a debit card.
when it comes to survival of a species......the simpler the better.