Multiple Geographical Origins of Environmental Sex Determination enhanced the diversification of Darwin’s Favourite Orchids

Pérez‐Escobar, Oscar Alejandro; Chomicki, Guillaume; Condamine, Fabien L.; Vos, Jurriaan M. de; Martins, Aline C.; Smidt, Eric C.; Klitgård, Bente B.; Gerlach, Günter; Heinrichs, Jochen

doi:10.1038/s41598-017-12300-y

Cited by 23 publications

(32 citation statements)

References 84 publications

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“…An approach that can build on these mechanistic models is to fit them to empirical data and estimate the influence of particular variables on biogeographical processes, for example using maximum likelihood (Condamine, Rolland, & Morlon, 2013) and Bayesian (Silvestro & Schnitzler, 2018) frameworks. The application of such methods shows that for several montane Andean plant taxa, surface uplift is associated with increased speciation (Pérez-Escobar, Chomicki, Condamine, de Vos, et al, 2017), but that this effect is strengthened by several biotic and abiotic variables such as pollination type, temperature changes and fruit type (Lagomarsino et al, 2016). However, the effect of surface uplift is probably taxon dependent.…”

Section: Relating Mountain Uplift To Species Diversificationmentioning

confidence: 99%

Why mountains matter for biodiversity

Perrigo

Hoorn

Antonelli

2019

Journal of Biogeography

212

141

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Mountains are arguably Earth's most striking features. They play a major role in determining global and regional climates, are the source of most rivers, act as cradles, barriers and bridges for species, and are crucial for the survival and sustainability of many human societies. The complexity of mountains is tightly associated with high biodiversity, but the processes underlying this association are poorly known. Solving this puzzle requires researchers to generate more primary data, and better integrate available geological and climatic data into biological models of diversity and evolution. In this perspective, we highlight emerging insights, which stress the importance of mountain building through time as a generator and reservoir of biodiversity. We also discuss recently proposed parallels between surface uplift, habitat formation and species diversification. We exemplify these links and discuss other factors, such as Quaternary climatic variations, which may have obscured some mountain‐building evidence due to erosion and other processes. Biological evolution is complex and the build‐up of mountains is certainly not the only explanation, but biological and geological processes are probably more intertwined than many of us realize. The overall conclusion is that geology sets the stage for speciation, where ecological interactions, adaptive and non‐adaptive radiations and stochastic processes act together to increase biodiversity. Further integration of these fields may yield novel and robust insights.

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Section: Relating Mountain Uplift To Species Diversificationmentioning

confidence: 99%

Why mountains matter for biodiversity

Perrigo

Hoorn

Antonelli

2019

Journal of Biogeography

212

141

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“…Different delimitations have been employed in biogeographical studies (e.g. Gentry, 1986; Morrone, 2006; Antonelli et al, 2009; Rangel-Chui, 2011; Pérez-Escobar et al, 2017b; Cano et al, 2018), but most of these encompass the area between Central Panama (the geographical limit between Colombia and Panama) or from Southern Nicaragua to north-western Venezuela (Morrone, 2006). The southern fringes are less debated, usually marked by the wet forests of the Pacific coast of northern Ecuador (Esmeraldas Province; Figure 1 ).…”

Section: Biogeography Climate and Diversity Of The Chocómentioning

confidence: 99%

“…Lineage colonizations occurred mostly after divergences from Central American and Andean ancestors between ∼7 and 1 Ma. Less frequent, alternative migration routes were recovered in Amphilophium and in the predominantly lowland epiphytic orchid Cycnoches (Pérez-Escobar et al, 2017b; Pérez-Escobar et al, 2017c). These are lineages from far-away biogeographical regions such as Amazonia which are, or have been, isolated from the Chocó by major geographical barriers (e.g.…”

Section: Hypotheses On the Mode And Tempo Of Evolution Of The Chocoanmentioning

confidence: 99%

The Origin and Diversification of the Hyperdiverse Flora in the Chocó Biogeographic Region

et al. 2019

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Extremely high levels of plant diversity in the American tropics are derived from multiple interactions between biotic and abiotic factors. Previous studies have focused on macro-evolutionary dynamics of the Tropical Andes, Amazonia, and Brazil’s Cerrado and Atlantic forests during the last decade. Yet, other equally important Neotropical biodiversity hotspots have been severely neglected. This is particularly true for the Chocó region on the north-western coast of South and Central America. This geologically complex region is Earth’s ninth most biodiverse hotspot, hosting approximately 3% of all known plant species. Here, we test Gentry’s [1982a,b] hypothesis of a northern Andean-Central American Pleistocene origin of the Chocoan flora using phylogenetic reconstructions of representative plant lineages in the American tropics. We show that plant diversity in the Chocó is derived mostly from Andean immigrants. Contributions from more distant biogeographical areas also exist but are fewer. We also identify a strong floristic connection between the Chocó and Central America, revealed by multiple migrations into the Chocó during the last 5 Ma. The dated phylogenetic reconstructions suggest a Plio-Pleistocene onset of the extant Chocó flora. Taken together, these results support to a limited extend Gentry’s hypothesis of a Pleistocene origin and of a compound assembly of the Chocoan biodiversity hotspot. Strong Central American–Chocoan floristic affinity may be partly explained by the accretion of a land mass derived from the Caribbean plate to north-western South America. Additional densely sampled phylogenies of Chocoan lineages also well represented across the Neotropics could enlighten the role of land mass movements through time in the assembly of floras in Neotropical biodiversity hotspots.

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“…Previous studies using a combination of three nuclear and two plastid loci failed to resolve the phylogenetic relationships of very young clades within Cycnoches (Batista et al, 2014;Gerlach and Pérez-Escobar, 2014;Pérez-Escobar et al, 2017a;Pérez-Escobar et al, 2017b). This statement is particularly true for the C. egertonianum species alliance, a complex consisting of seven species and two subspecies restricted to Central America and the Chocó region of South America.…”

Section: Introductionmentioning

confidence: 97%

Resolving relationships in an exceedingly young orchid lineage using Genotyping-by-sequencing data

Escobar

Bogarín

Schley

et al. 2018

Preprint

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Poor morphological and molecular differentiation in recently diversified lineages is a widespread phenomenon in plants. Phylogenetic relationships within such species complexes are often difficult to resolve because of the low variability in traditional molecular loci, as well as various other biological phenomena responsible for topological incongruence such as ILS and hybridization. In this study, we employ a Genotyping-by-sequencing (GBS) approach to disentangle evolutionary relationships within a species complex belonging to the Neotropical orchid genus Cycnoches. The complex includes seven taxa distributed in Central America and the adjacent Chocó biogeographic region, nested within a clade estimated to have first diversified in the early Quaternary. Previous phylogenies inferred from a handful of loci failed to provide support for internal relationships within the complex. Our Neighbor-net and coalescent-based analyses inferred from ca. 13,000 GBS loci obtained from 31 individuals belonging to six of the seven traditionally accepted Cycnoches species provided a robustly supported network. The resulting three main clades are corroborated by morphological traits and geographical distributions. Similarly, Maximum Likelihood (ML) inferences of concatenated GBS-loci produced results comparable with those derived from coalescence and network-based methods, albeit always with poor statistical support. The low support evident in the ML phylogeny might be attributed to the abundance of uninformative GBS loci, which can account for up to 50% of the total number of loci recovered. The phylogenomic framework provided here, as well as morphological evidence and geographical patterns, suggest that the six entities previously thought to be different species might actually represent only three distinct segregates. Our study is the first to demonstrate the utility of GBS data in phylogenomic research of a very young Neotropical plant clade (~2 Ma), and it paves the way for the study of the many other species complexes that populate the species-rich orchid family.

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Multiple Geographical Origins of Environmental Sex Determination enhanced the diversification of Darwin’s Favourite Orchids

Cited by 23 publications

References 84 publications

Why mountains matter for biodiversity

Why mountains matter for biodiversity

The Origin and Diversification of the Hyperdiverse Flora in the Chocó Biogeographic Region

Resolving relationships in an exceedingly young orchid lineage using Genotyping-by-sequencing data

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