Geographical distribution, climatic variability and thermo-tolerance of Chagas disease vectors

Understanding the relationship between geographic range limits and physiological traits of vector species is under increasing demand to predict the potential effects of global warming, not only in terms of geographic distribution of vector species but also in terms of the risk of disease transmissio...

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Autor principal: Schilman, Pablo Ernesto
Publicado: 2015
Materias:
bioclimatology
climate variation
disease transmission
disease vector
geographical distribution
global warming
limiting factor
numerical model
parasitic disease
population distribution
temperature tolerance
Central America
South America
Hexapoda
Rhodnius prolixus
Triatoma infestans
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09067590_v38_n8_p851_delaVega
http://hdl.handle.net/20.500.12110/paper_09067590_v38_n8_p851_delaVega
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_09067590_v38_n8_p851_delaVega
record_format dspace
spelling paper:paper_09067590_v38_n8_p851_delaVega2023-06-08T15:49:52Z Geographical distribution, climatic variability and thermo-tolerance of Chagas disease vectors Schilman, Pablo Ernesto bioclimatology climate variation disease transmission disease vector geographical distribution global warming limiting factor numerical model parasitic disease population distribution temperature tolerance Central America South America Hexapoda Rhodnius prolixus Triatoma infestans Understanding the relationship between geographic range limits and physiological traits of vector species is under increasing demand to predict the potential effects of global warming, not only in terms of geographic distribution of vector species but also in terms of the risk of disease transmission. Like in many other insect species, the geographical distribution of Chagas' disease vectors is affected by temperature. This study examines, for the first time, the relationship between the limits of geographic distribution and thermo-tolerance of the most important vectors of Chagas disease, Triatoma infestans in southern South America and Rhodnius prolixus in northern South America and Central America, to test the climatic variability hypothesis (CVH). We applied species distribution modeling (SDM) using bioclimatic variables and identified the most important limiting factors of the habitat suitability. Then, we measured and compared: the critical thermal maximum (CTmax) and the upper lethal temperature (ULT) (measured by thermo-limit respirometry), chilled coma recovery (i.e. the time to recovery from 4 h at 0°C) and the critical thermal minimum (CTmin). For both species the minimum temperature of the coldest month was the most important abiotic factor restricting their geographic distribution. By taking a correlative approach and testing predictions with thermal tolerance traits, it was possible to explain the southern limit distribution for both species in terms of physiological constraints. The greater temperature tolerance of T. infestans compared to R. prolixus supports the CVH. © 2014 The Authors. Fil:Schilman, P.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09067590_v38_n8_p851_delaVega http://hdl.handle.net/20.500.12110/paper_09067590_v38_n8_p851_delaVega
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic bioclimatology
climate variation
disease transmission
disease vector
geographical distribution
global warming
limiting factor
numerical model
parasitic disease
population distribution
temperature tolerance
Central America
South America
Hexapoda
Rhodnius prolixus
Triatoma infestans
spellingShingle bioclimatology
climate variation
disease transmission
disease vector
geographical distribution
global warming
limiting factor
numerical model
parasitic disease
population distribution
temperature tolerance
Central America
South America
Hexapoda
Rhodnius prolixus
Triatoma infestans
Schilman, Pablo Ernesto
Geographical distribution, climatic variability and thermo-tolerance of Chagas disease vectors
topic_facet bioclimatology
climate variation
disease transmission
disease vector
geographical distribution
global warming
limiting factor
numerical model
parasitic disease
population distribution
temperature tolerance
Central America
South America
Hexapoda
Rhodnius prolixus
Triatoma infestans
description Understanding the relationship between geographic range limits and physiological traits of vector species is under increasing demand to predict the potential effects of global warming, not only in terms of geographic distribution of vector species but also in terms of the risk of disease transmission. Like in many other insect species, the geographical distribution of Chagas' disease vectors is affected by temperature. This study examines, for the first time, the relationship between the limits of geographic distribution and thermo-tolerance of the most important vectors of Chagas disease, Triatoma infestans in southern South America and Rhodnius prolixus in northern South America and Central America, to test the climatic variability hypothesis (CVH). We applied species distribution modeling (SDM) using bioclimatic variables and identified the most important limiting factors of the habitat suitability. Then, we measured and compared: the critical thermal maximum (CTmax) and the upper lethal temperature (ULT) (measured by thermo-limit respirometry), chilled coma recovery (i.e. the time to recovery from 4 h at 0°C) and the critical thermal minimum (CTmin). For both species the minimum temperature of the coldest month was the most important abiotic factor restricting their geographic distribution. By taking a correlative approach and testing predictions with thermal tolerance traits, it was possible to explain the southern limit distribution for both species in terms of physiological constraints. The greater temperature tolerance of T. infestans compared to R. prolixus supports the CVH. © 2014 The Authors.
author Schilman, Pablo Ernesto
author_facet Schilman, Pablo Ernesto
author_sort Schilman, Pablo Ernesto
title Geographical distribution, climatic variability and thermo-tolerance of Chagas disease vectors
title_short Geographical distribution, climatic variability and thermo-tolerance of Chagas disease vectors
title_full Geographical distribution, climatic variability and thermo-tolerance of Chagas disease vectors
title_fullStr Geographical distribution, climatic variability and thermo-tolerance of Chagas disease vectors
title_full_unstemmed Geographical distribution, climatic variability and thermo-tolerance of Chagas disease vectors
title_sort geographical distribution, climatic variability and thermo-tolerance of chagas disease vectors
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09067590_v38_n8_p851_delaVega
http://hdl.handle.net/20.500.12110/paper_09067590_v38_n8_p851_delaVega
work_keys_str_mv AT schilmanpabloernesto geographicaldistributionclimaticvariabilityandthermotoleranceofchagasdiseasevectors
_version_ 1768544825914687488

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