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Influence of water's physical and chemical parameters on mosquito (Diptera: Culicidae) assemblages in larval habitats in urban parks of Sao Paulo, Brazil

Texto completo
Autor(es):
Medeiros-Sousa, Antonio Ralph [1] ; de Oliveira-Christe, Rafael [2] ; Camargo, Amanda Alves [1] ; Scinachi, Claudia Araujo [1] ; Milani, Gerlice Maria [1] ; Urbinatti, Paulo Roberto [1] ; Natal, Delsio [1] ; Ceretti-Junior, Walter [1] ; Marrelli, Mauro Toledo [1, 2]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sch Publ Hlth, Dept Epidemiol, Av Dr Arnaldo 715, Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Trop Med Inst, Av Dr Eneas Carvalho de Aguiar 470, Sao Paulo, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Acta Tropica; v. 205, MAY 2020.
Citações Web of Science: 0
Resumo

Water's physical and chemical characteristics are important constraints in aquatic ecosystems, acting on the development, survival, and adaptation of different organisms. Immature forms of mosquitoes develop in widely diverse aquatic environments and are mainly found in permanent or temporary freshwater bodies with little or no movement. The current study aimed to investigate whether variations in larval habitats' pH, salinity, dissolved oxygen, and water temperature influence the composition of Culicidae assemblages and the presence and abundance of Aedes albopictus and Ae. aegypti. From August 2012 to July 2013, captures of immature forms and measurement of water's physical and chemical profiles were performed monthly in natural and artificial breeding sites in four urban parks in the city of Sao Paulo, Brazil. Changes in species composition related to the parameters' variation were assessed by multivariate analysis. Regression trees were performed to evaluate the effect of breeding sites' physical and chemical variations on the presence and abundance of Ae. albopictus and Ae. aegypti. The observations suggest ranges of conditions for the measured variables in which most species tend to be found more frequently, and pH and salinity are the variables most closely associated with variations in mosquito composition. Ae. aegypti and Ae. albopictus were present in both natural and artificial breeding sites and were observed under significantly varying conditions of pH, salinity, dissolved oxygen, and temperature. For Ae. albopictus, larval habitat type and pH were the best predictors of incidence and abundance. For Ae. aegypti, pH and salinity were the best predictors of abundance, while dissolved oxygen and larval habitat type were better predictors of presence. This information broadens our understanding of the ecology and interaction of the investigated species with abiotic factors in the aquatic environments, providing useful data for studies that seek to elucidate the underlying mechanisms of selection and colonization of breeding sites by these mosquitoes. This study also reinforces previous observations indicating that Ae. albopictus and Ae. aegypti can colonize diverse types of larval habitats with widely varying physical and chemical conditions. (AU)

Processo FAPESP: 15/18630-6 - Estudo da dinâmica de transmissão de malária autóctone de Mata Atlântica: Análise da distribuição vertical de Anopheles cruzii (Diptera: Culicidae) e desenvolvimento de modelo matemático para a transmissão zoonótica.
Beneficiário:Antônio Ralph Medeiros de Sousa
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 10/51230-8 - Biodiversidade de mosquitos (Diptera : Culicidae) nos parques municipais da cidade de São Paulo
Beneficiário:Mauro Toledo Marrelli
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Regular
Processo FAPESP: 14/50444-5 - Biodiversidade de mosquitos (Diptera : Culicidae) no Parque Estadual da Cantareira e na área de proteção ambiental Capivari - Monos, estado de São Paulo
Beneficiário:Mauro Toledo Marrelli
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Regular