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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Widespread Gene Flow Model Explains the Genetic-Morphological Variation in a Giant Water Bug Species Under Fine-Scale Spatial Sampling

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Stefanello, Fabiano [1] ; Menezes, Rodolpho S. T. [1] ; Ribeiro, I, Jose Ricardo ; Almeida, Eduardo A. B. [1]
Total Authors: 4
[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto FF, Dept Biol, Lab Biol Comparada & Abelhas LBCA, Ribeirao Preto - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Annals of the Entomological Society of America; v. 113, n. 3, p. 160-170, MAY 2020.
Web of Science Citations: 0

The population dynamics of freshwater organisms are expected to be related to the connectivity among comparable streams, ponds, or rivers in a patchy habitat. Here, we investigated the population dynamics of the giant water bug, Belostoma angustum Lauck 1964 (Hemiptera: Belostomatidae), in a fine-scale spatial sampling, and evaluated which gene flow model previously described for freshwater organisms could explain the genetic-morphological variation in this species. For these purposes, we evaluated genetic and morphological variations, as well as the demographic history of this freshwater insect. Our genetic analyses showed a lack of geographical structure within B. angustum populations across the evaluated range, concordant with widespread gene flow model. Our findings of the demographic history of B. angustum suggest recent and rapid expansion beginning during the late Pleistocene after the Last Glacial Maximum. Likewise, we did not find geographically structured morphological variation in B. angustum, except for body size. The lack of structure of genetic-morphological variation in B. angustum could be explained by a stepping ponds system resulting in the widespread gene flow detected among populations of this species. The warmer and wetter climatic conditions after the last glacial period may have favored the demographic expansion of B. angustum populations due to the increasing of potential freshwater habitats and food resources. This favorable habitat probably allowed the stepping ponds dispersal mode resulting in the verified geographically unstructured genetic-morphological variation. (AU)

FAPESP's process: 11/09477-9 - Taxonomy, phylogeny, biogeography, and evolution of Neopasiphaeinae bees (Hymenoptera: Colletidae) using molecular and morphological data
Grantee:Eduardo Andrade Botelho de Almeida
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 15/07166-7 - Spatial history of populations of Belostoma angustum Lauck, 1964 (Heteroptera: Belostomatidae) and genetic-morphological variation along mountain chains in Rio Grande do Sul, Brazil
Grantee:Fabiano Stefanello
Support type: Scholarships in Brazil - Master
FAPESP's process: 16/21098-7 - Bridging chromosomal evolution and diversification in neotropical swarm-founding wasps through phylogenomics
Grantee:Rodolpho Santos Telles de Menezes
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 16/12720-6 - Male and female genitalic variation in populations of the giant water bug Belostoma angustum Lauck, 1964 (Insecta, Belostomatidae) and mechanisms driving this variation
Grantee:Fabiano Stefanello
Support type: Scholarships abroad - Research Internship - Master's degree
FAPESP's process: 18/09666-5 - Phylogenomic systematics, comparative morphology and biogeography of bees (Hymenoptera: Anthophila)
Grantee:Eduardo Andrade Botelho de Almeida
Support type: Regular Research Grants