ArticleBMC evolutionary biology2014
Rock outcrop orchids reveal the genetic connectivity and diversity of inselbergs of northeastern Brazil.
Article in BMC evolutionary biology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Geographically proximate rare species exhibit strong population divergence while maintaining intraspecific genetic diversity in Homoranthus (Myrtaceae).Annals of botany · 2026Article
- An Overview of Orchidaceae from Brazil: Advances and Shortfalls After 400 Years of Studies.Plants (Basel, Switzerland) · 2025Review
- Plant communities on inselbergs in Burkina Faso.Heliyon · 2024Article
- Exploring island syndromes: Variable matrix permeability inFrontiers in plant science · 2023Article
- Four raised to one equals one: A genetic approach to theEcology and evolution · 2020Article
- Do plant populations on distinct inselbergs talk to each other? A case study of genetic connectivity of a bromeliad species in an Ocbil landscape.Ecology and evolution · 2017Article
- The demographic response of a deciduous shrub (the Indigofera bungeana complex, Fabaceae) to the Pleistocene climate changes in East Asia.Scientific reports · 2017Article
- Article
- Cross-genera SSR transferability in cacti revealed by a case study using Cereus (Cereeae, Cactaceae).Genetics and molecular biologyArticle
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7 authors.
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Abstract
backgroundBecause of their fragmented nature, inselberg species are interesting biological models for studying the genetic consequences of disjoint populations. Inselbergs are commonly compared with oceanic islands, as most of them display a marked ecological isolation from the surrounding area. The isolation of these rock outcrops is reflected in the high number of recorded endemic species and the strong floristic differences between individual inselbergs and adjacent habitats. We examined the genetic connectivity of orchids Epidendrum cinnabarinum and E. secundum adapted to Neotropical inselbergs of northeastern Brazil. Our goals were to identify major genetic divergences or disjunctions across the range of the species and to investigate potential demographic and evolutionary mechanisms leading to lineage divergence in Neotropical mountain ecosystems.
resultsBased on plastid markers, high genetic differentiation was found for E. cinnabarinum (FST = 0.644) and E. secundum (FST = 0.636). Haplotypes were not geographically structured in either taxon, suggesting that restricted gene flow and genetic drift may be significant factors influencing the diversification of these inselberg populations. Moreover, strong differentiation was found between populations over short spatial scales, indicating substantial periods of isolation among populations. For E. secundum, nuclear markers indicated higher gene flow by pollen than by seeds.
conclusionsThe comparative approach adopted in this study contributed to the elucidation of patterns in both species. Our results confirm the ancient and highly isolated nature of inselberg populations. Both species showed similar patterns of genetic diversity and structure, highlighting the importance of seed-restricted gene flow and genetic drift as drivers of plant diversification in terrestrial islands such as inselbergs.
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