Does Triatoma brasiliensis occupy the same environmental niche space as Triatoma melanica?

dc.creatorSouza, Rita de Cássia Moreira de
dc.creatorSilva, Gabriel Henrique Campolina
dc.creatorBezerra, Claudia Mendonça
dc.creatorDiotaiuti, Liléia Gonçalves
dc.creatorGorla, David Eladio
dc.date2016-02-19T16:19:20Z
dc.date2016-02-19T16:19:20Z
dc.date2015
dc.date.accessioned2023-09-27T00:01:25Z
dc.date.available2023-09-27T00:01:25Z
dc.identifierSOUZA, Rita de Cássia Moreira de et al. Does Triatoma brasiliensis occupy the same environmental niche space as Triatoma melanica? Parasites & Vectors, vol. 8, p. 361, 2015
dc.identifier1756-3305
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/12762
dc.identifier10.1186/s13071-015-0973-4
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8896637
dc.descriptionBackground: Triatomines (Hemiptera, Reduviidae) are vectors of Trypanosoma cruzi, the causative agent of Chagas disease, one of the most important vector-borne diseases in Latin America. This study compares the environmental niche spaces of Triatoma brasiliensis and Triatoma melanica using ecological niche modelling and reports findings on DNA barcoding and wing geometric morphometrics as tools for the identification of these species. Methods: We compared the geographic distribution of the species using generalized linear models fitted to elevation and current data on land surface temperature, vegetation cover and rainfall recorded by earth observation satellites for northeastern Brazil. Additionally, we evaluated nucleotide sequence data from the barcode region of the mitochondrial cytochrome c oxidase subunit I (CO1) and wing geometric morphometrics as taxonomic identification tools for T. brasiliensis and T. melanica. Results: The ecological niche models show that the environmental spaces currently occupied by T. brasiliensis and T. melanica are similar although not equivalent, and associated with the caatinga ecosystem. The CO1 sequence analyses based on pair wise genetic distance matrix calculated using Kimura 2-Parameter (K2P) evolutionary model, clearly separate the two species, supporting the barcoding gap. Wing size and shape analyses based on seven landmarks of 72 field specimens confirmed consistent differences between T. brasiliensis and T. melanica. Conclusion: Our results suggest that the separation of the two species should be attributed to a factor that does not include the current environmental conditions. However, as the caatinga is a biome that has existed in the area for at least the last 18,000 years, past conditions might have had an influence in the speciation process. The DNA Barcoding approach may be extended to these members of the subfamily Triatominae.
dc.formatapplication/pdf
dc.languageeng
dc.publisherBiomed Central
dc.rightsopen access
dc.subjectTriatominae
dc.subjectGeometric Morphometrics
dc.subjectDNA barcode
dc.subjectChagas disease
dc.subjectGeographic distribution
dc.subjectEcological niche modelling
dc.titleDoes Triatoma brasiliensis occupy the same environmental niche space as Triatoma melanica?
dc.typeArticle


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