The influences of human‐caused changes in a natural ecosystem of Southern Brazil on mosquitoes of the family Culicidae, which may be vectors of diseases, were investigated. Particular attention was given to the effects of deforestation and human settlements with artificial irrigation. The work assumes a preserved environment as representative of the natural ecosystem before human intervention. Another collection site, 50 kilometers from the primitive forest, that presented the same fauna and flora of the former some 50 years ago was chosen as the modified environment. The results clearly showed that some species, such as the Kerteszia subgenus, do not survive these changes, whereas others have found such conditions favorable and have proliferated.
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Forattini et al. (1998) studied this question.
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