2024-03-28T19:24:01Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1420032021-12-27T16:28:30Zcom_10261_108com_10261_8col_10261_361
DIGITAL.CSIC
author
Tene Fossog, Billy
author
Acevedo, Pelayo
author
Besansky, Nora J.
author
Costantini, Carlo
funder
Institut de Recherche pour le Développement (France)
funder
National Institutes of Health (US)
funder
Wellcome Trust
funder
Universidad de Castilla La Mancha
funder
Universidad Nacional de Guinea Ecuatorial
funder
Ministerio de Economía y Competitividad (España)
2017-01-03T10:59:29Z
2017-01-03T10:59:29Z
2015
Evolutionary Applications 8(4): 326-345 (2015)
http://hdl.handle.net/10261/142003
10.1111/eva.12242
http://dx.doi.org/10.13039/100000002http://dx.doi.org/10.13039/100004440http://dx.doi.org/10.13039/501100007480http://dx.doi.org/10.13039/501100003329http://dx.doi.org/10.13039/100012947
25926878
Understanding how divergent selection generates adaptive phenotypic and population diversification provides a mechanistic explanation of speciation in recently separated species pairs. Towards this goal, we sought ecological gradients of divergence between the cryptic malaria vectors Anopheles coluzzii and An. gambiae and then looked for a physiological trait that may underlie such divergence. Using a large set of occurrence records and eco-geographic information, we built a distribution model to predict the predominance of the two species across their range of sympatry. Our model predicts two novel gradients along which the species segregate: distance from the coastline and altitude. Anopheles coluzzii showed a 'bimodal' distribution, predominating in xeric West African savannas and along the western coastal fringe of Africa. To test whether differences in salinity tolerance underlie this habitat segregation, we assessed the acute dose-mortality response to salinity of thirty-two larval populations from Central Africa. In agreement with its coastal predominance, Anopheles coluzzii was overall more tolerant than An. gambiae. Salinity tolerance of both species, however, converged in urban localities, presumably reflecting an adaptive response to osmotic stress from anthropogenic pollutants. When comparing degree of tolerance in conjunction with levels of syntopy, we found evidence of character displacement in this trait.
eng
openAccess
Molecular forms
Malaria vector
Habitat segregation
Ecological speciation
Ecological character displacement
Cryptic species
Anopheles gambiae
Anopheles coluzzii
Niche partitioning
Urban pollution
Saltwater tolerance
Spatial ecology
Species distribution modelling
Habitat segregation and ecological character displacement in cryptic African malaria mosquitoes
artículo
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URL
https://digital.csic.es/bitstream/10261/142003/1/Africanmalariamosquito.pdf
File
MD5
2588ff04a83336d8d2faa88682f8ed82
1119990
application/pdf
Africanmalariamosquito.pdf