Cosimo, if you one of the worlds most populous insect being a food source for many animals is not something forehead-slappingly obvious in ecological terms, then I would be a tad worried. It is widespread knowledge and publicly available info.
Do your own research for the specific data on animals that feed on them, I'm not your personal Wiki. http://lmgtfy.com/?q=animals+that+feed+on+mosquitos
Although I agree that Cosimo seems to be trying hard to be purposely difficult and obtuse, my own quick Google suggests that, although it would be a problem in some specific circumstances, there wouldn't be a catastrophic break down in the world's ecosystems:
http://www.nature.com/news/2010/100721/full/466432a.html
Having said that, I don't believe we have the right to wipe another species off the face of the Earth.