Ecological aspects of potential arbovirus vectors (Diptera: Culicidae) in an urban landscape of Southern Amazon, Brazil

•Mosquito abundance was higher in days of high temperature and low precipitation.•Abundance was higher in urban forest parks and in highly urbanized neighborhoods.•Most of the species found in Sinop are associated with arboviruses transmission.•Mosquitoes are reaching urbanized areas, probably adapt...

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Published in:Acta tropica 2020-02, Vol.202, p.105276-105276, Article 105276
Main Authors: Vieira, Carla Julia da Silva Pessoa, Thies, Sirlei Franck, da Silva, David José Ferreira, Kubiszeski, Janaína Rigotti, Barreto, Eriana Serpa, Monteiro, Hamilton Antônio de Oliveira, Mondini, Adriano, São Bernardo, Christine Steiner, Bronzoni, Roberta Vieira de Morais
Format: Article
Language:English
Subjects:
Arboviruses emergence
Entomological surveillance
Vector ecology
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Summary:•Mosquito abundance was higher in days of high temperature and low precipitation.•Abundance was higher in urban forest parks and in highly urbanized neighborhoods.•Most of the species found in Sinop are associated with arboviruses transmission.•Mosquitoes are reaching urbanized areas, probably adapting to the new habitats.•Results suggest Sinop region as a key area for surveillance of arbovirus vectors. Amazon has been under intense human pressure, especially in the so-called “Arc of Deforestation” in the Eastern and Southern regions. Changes in biodiversity due to landscape disturbance in municipalities at the Arc of Deforestation are likely to impact mosquito species leading to the potential for emergence of arboviruses. Our aim was to describe the composition and structure of culicids in Sinop, a municipality located in the Southern Amazon at the State of Mato Grosso, as well as their presence in urban habitats, analyzing climate variables and potential risk of arbovirus transmission. Mosquitoes were collected in four habitats located in urban environments for 12 months. We recovered 5,210 adult mosquitoes from mosquito traps. Among the 33 species identified, 19 are associated with arbovirus transmission. Higher abundance, richness, diversity, and equitability of mosquito species were observed in urban forest parks and in new neighborhoods located in the outskirts of the city, nearby forest fragments and agricultural areas. As the environment consolidates as urban, both abundance and richness decrease. Highly urbanized neighborhoods had higher dominance of Culex quinquefasciatus, a mosquito associated with different arboviruses, including West Nile and Saint Louis encephalitis virus. The medically important species Cx. declarator, Cx. (Melanoconion) ssp., Aedeomyia squamipennis and Aedes scapularis were found in the four habitats. It is possible that these mosquitoes are adapting to different habitats and as a consequence, they are reaching urbanized areas. Mosquito abundance was higher in the days of high temperature and low precipitation in urban forest parks and in highly urbanized neighborhoods. These results suggest that Sinop region is a key area for surveillance of arbovirus vectors.
ISSN:0001-706X
1873-6254
DOI:10.1016/j.actatropica.2019.105276