Not really true. Mosquitos are an important part of the ecosystem, they (especially their larva) are important food sources for other creatures. However, most

Not really true. Mosquitos are an important part of the ecosystem, they (especially their larva) are important food sources for other creatures. However, most species of mosquitoes do not bite humans and not all of those are capable of spreading disease. What you are probably referencing is experiments in extermining specific disease carrying species. I don't think those studies have claimed "no shift in the ecosystem."