Distribution of Haemagogus and Sabethes Species in Relation to Forest Cover and Climatic Factors in the Chapada Dos Guimarães National Park, State of Mato Grosso, Brazil

Author:

Alencar Jeronimo1,Mello Cecilia Ferreira de12,Morone Fernanda1,Albuquerque Hermano Gomes3,Serra-Freire Nicolau Maués4,Gleiser Raquel M.5,Silva Shayenne Olsson Freitas1,Guimarães Anthony Érico1

Affiliation:

1. Diptera Laboratory, Oswaldo Cruz Institute (FIOCRUZ), Avenida Brazil 4365, CEP 21040-360 Manguinhos, Rio de Janeiro, Brazil.

2. Postgraduate Program Program in Animal Biology, Institute of Biology, Federal Rural University of Rio de Janeiro, CEP 23890-000 Seropédica, Rio de Janeiro, Brazil.

3. Laboratory of Parasitic Diseases, Instituto Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil.

4. National Reference Laboratory for Rickettsiosis, Oswaldo Cruz Institute (FIOCRUZ), Avenida Brazil 4365, CEP 21040-360 Manguinhos, Rio de Janeiro, Brazil.

5. Centro de Relevamiento y Evaluación de Recursos Agrícolas y Naturales–Instituto Multidisciplinario de Biología Vegetal (Consejo Nacional de Investigaciones Científicas y Técnicas–Universidad Nacional de Córdoba [CONICET-UNC]), Avenida Valparaíso sn (5016); and Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Avenida Vélez Sársfield 299, Córdoba, Argentina.

Abstract

ABSTRACT Members of the genera Haemagogus and Sabethes are the most important biological vectors of the wild yellow fever virus (WYF) in the forested areas of the Americas. The ecologies of Haemagogus janthinomys, Hg. leucocelaenus, Sabethes chloropterus, and Sa. glaucodaemon were studied in a forest of the Chapada dos Guimarães National Park, state of Mato Grosso, Brazil, to evaluate the influence of climatic factors (temperature and relative humidity [RH]) on their abundance. We also examined the association of climate with landscape structure on species distribution patterns throughout the seasons of the year. Multiple stepwise regressions showed that RH was most likely to influence the density of mosquito populations. A multidimensional scaling (MDS) was used to evaluate the effects of forest cover on the composition of mosquito populations at different radii (100-, 250-, and 1,000-m-radius buffer areas). The MDS provided 2 dimensions with values that indicated a higher similarity in the composition of culicid populations between sites 1 and 3, while site 2 was separate from the others in the ordination space. Site 2 had a much higher forest cover ratio at 100-m radius compared with sites 1 and 3. We found a possible relationship between the forest cover and the composition of the mosquito populations only in the 100-m radius. These results enabled us to infer that RH directly favored the activity of mosquito populations and that the forest cover located closest to the sampling site may influence the species composition. Since mosquito abundance was higher in the sites with lower local forest cover, forest fragmentation may be a key factor on the presence of WYF vector.

Publisher

The American Mosquito Control Association

Subject

Insect Science,Public Health, Environmental and Occupational Health,General Medicine,Ecology, Evolution, Behavior and Systematics

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