Name: Guilherme Sanches Corrêa do Nascimento
Type: MSc dissertation
Publication date: 08/02/2019

Namesort descending Role
Gustavo Rocha Leite Advisor *

Examining board:

Namesort descending Role
Aloísio Falqueto External Examiner *
Ana Carolina Loss Rodrigues External Alternate *
Gustavo Rocha Leite Advisor *
Joyce Rodrigues do Prado Internal Examiner *

Summary: Rhodniini is the second most diverse tribe in the Triatominae subfamily, which is composed of insects that transmit Chagas disease, commonly known by kissing bugs. This tribe is an interesting group for biogeographic studies, being
distributed practically in every climatic area in the neotropical region and presenting trans and cis Andean limitation in their main groups. In this study 5640 occurrence points for 22 species and 3 monophyletic groups created within Robustus criptic complex were collected in the scientific literature and georeferenced. The data was applied in the historical and ecological biogeographic analysis. In the first approach panbiogeography as a way to create diversification areas was used. Track analysis was made following the method of parsimony analysis in ArcGIS 10.5 and TNT 1.5. The diversification areas together with the phylogenetic and molecular clock already published, recovered the Acre system, Andean uprisings and the Pebas system as important geological events in the evolutionary history of the group. The northern part of the last system may have been related to the first diversification of the group. In the study of ecological biogeography ecological niche models for 16 species of the tribe in the present and near future conditions was created, taking into account climatic change in more conservative and more extreme scenarios. The algorithm Maxent, 20 bioclimatic variables of Worldclim and ArcGIS 10.5 were used. The comparisons between the models of the present and future conditions indicated loss of suitability climate conditions for most of the species, which some have almost their entire area of distribution extinguish. It was possible to observe predictions of change in suitable areas of occurrence between some species, including an exchange of typically sylvatic populations for triatomines capable of domiciliation. In a general overview this work shows that panbiogeography is a method capable of rebuild diversification areas of the group and climate change generates a risk of loss in biodiversity and in public health related to this triatomines.

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