| Full text | |
| Author(s): |
Peres, Elen A.
;
Silva, Marcio J.
;
Solferini, Vera N.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Biological Journal of the Linnean Society; v. 121, n. 4, p. 771-785, AUG 2017. |
| Web of Science Citations: | 6 |
| Abstract | |
Several pieces of evidence support the hypothesis that the Amazon and Atlantic rainforests were connected in the past, but the details of this historical disjunction are poorly understood. Here, we investigated ancient events related to these biomes' biogeography by performing a phylogeographical analysis of Araneus venatrix, a spider distributed in Neotropical humid environments. We sequenced one mitochondrial and one nuclear DNA region of samples from 30 locations throughout the A. venatrix distribution and estimated the genetic structure, diversity and demographic patterns in the species. Additionally, we inferred the phylogenetic relationships, divergence times and ancestral areas of A. venatrix lineages. We detected a deep split (Late Miocene/Early Pliocene) between two A. venatrix clades, separating most of the southern Atlantic forest's populations from all other samples. Within-clade diversifications are more recent (Pleistocene), and geographically associated mitochondrial lineages were identified in the widespread clade (in the Amazon, northern Atlantic forest and south-central region of Brazil). The biogeographical analysis indicated that the widespread clade originated in Cerrado gallery forests and suggested recent dispersal events through two putative connections between rainforests (through Caatinga and through southern Cerrado). Our data suggest that both Tertiary and Quaternary events influenced rearrangements of Neotropical rainforests. Additionally, the results indicate that the processes underlying the biomes' diversification are not independent, highlighting the relevance of studying taxa broadly distributed in the Neotropics. (AU) | |
| FAPESP's process: | 10/50624-2 - Phylogeography of Araneus guttatus (Arachnida: Araneae) |
| Grantee: | Elen Arroyo Peres |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 12/02526-7 - Phylogeography and populational genetic structure of spiders species (Arachnida, Araneae) |
| Grantee: | Vera Nisaka Solferini |
| Support Opportunities: | Regular Research Grants |