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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.)

Phylogeography of the specialist plant Mandirola hirsuta (Gesneriaceae) suggests ancient habitat fragmentation due to savanna expansion

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Fiorini, Cecilia F. [1, 2] ; Peres, Elen Arroyo [2, 3] ; da Silva, Marcio Jose [4] ; Araujo, Andrea Onofre [5] ; Borba, Eduardo Leite [1] ; Solferini, Vera Nisaka [2]
Total Authors: 6
[1] Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Bot, Av Pres Antonio Carlos 6627, BR-31270901 Belo Horizonte, MG - Brazil
[2] Univ Estadual Campinas, Inst Biol, Dept Genet Evolucao Microbiol & Imunol, Rua Bertrand Russel S-N, BR-13083970 Campinas, SP - Brazil
[3] Univ Sao Paulo, Inst Biociencias, Dept Zool, Rua Matao 101, Travessa 14, BR-05508090 Sao Paulo, SP - Brazil
[4] Univ Estadual Campinas, Ctr Biol Mol & Engn Genet, Ave Candido Rondon 400, BR-13083875 Campinas, SP - Brazil
[5] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Rua Sao Paulo S-N, BR-09606070 Sao Bernardo Do Campo, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: FLORA; v. 262, JAN 2020.
Web of Science Citations: 0

The area occupied by tropical forests in South America has continually experienced shrinkage since the Miocene, with the formation of the Dry Diagonal, which is composed of seasonally dry tropical forests and savannas (Caatinga, Cerrado, and Chaco). Here, we contribute to the understanding of the establishment of the Dry Diagonal by testing the hypotheses of ``ancestral fragmentation{''} and of ``colonization{''} to explain the current distribution of species in rocky humid formations of Cerrado, a Neotropical savanna in Brazil. Populations of Mandirola hirsuta (Gesneriaceae) were sampled in 25 localities; these cover the species' entire geographical distribution, and the plastid intergenic regions psbA-trnH and trnQ-5'-rps16 were sequenced. The findings show that intrapopulation genetic variability was low, whereas interpopulation variability was high. We detected seven genetic groups that were geographically well delimited, and no signs of recent population expansion were observed. Divergence between the seven main lineages took place between the late Miocene and the Pliocene periods. In Approximate Bayesian Computation, the fragmentation scenario had a significantly higher probability than the colonization scenario. Results support the hypothesis of a former broader distribution for the humid vegetation, which was fragmented with the expansion of savannas; results also indicate population differentiation promoted by a rapid expansion of the Dry Diagonal. (AU)

FAPESP's process: 11/20269-9 - Taxonomic studies of Mandirola - Goyazia clade (Gloxinieae - Gesneriaceae)
Grantee:Andréa Onofre de Araújo
Support type: Regular Research Grants
FAPESP's process: 12/02526-7 - Phylogeography and populational genetic structure of spiders species (Arachnida, Araneae)
Grantee:Vera Nisaka Solferini
Support type: Regular Research Grants