References of "Vanderpoorten, Alain"
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See detailWhat do tropical cryptogams reveal? Strong genetic structure in Amazonian bryophytes
Ledent, Alice ULiege; Gauthier, Jérémy; Pereira, Marta et al

in New Phytologist (in press)

Lowland tropical bryophytes have been perceived as excellent dispersers. In such groups, the inverse isolation hypothesis proposes that spatial genetic structure is erased beyond the limits of short ... [more ▼]

Lowland tropical bryophytes have been perceived as excellent dispersers. In such groups, the inverse isolation hypothesis proposes that spatial genetic structure is erased beyond the limits of short-distance dispersal. Here, we determine the relative influence of environmental variation and geographic barriers on the spatial genetic structure of a widely dispersed and phylogenetically independent sample of Amazonian bryophytes. • Single nucleotide polymorphism data were produced from a restriction site-associated DNA sequencing protocol for 10 species and analyzed through F-statistics and Mantel tests. • Neither isolation-by-environment nor the impact of geographic barriers were recovered from the analyses. However, significant isolation-by-distance patterns were observed for 8 out of the 10 investigated species beyond the scale of short-distance dispersal (>1 km), offering evidence contrary to the inverse isolation hypothesis. • Despite a cadre of life-history traits and distributional patterns suggesting that tropical bryophytes are highly vagile, our analyses reveal spatial genetic structures comparable to those documented for angiosperms, whose diaspores are orders of magnitude larger. Dispersal limitation for common, widespread tropical bryophytes flies in the face of traditional assumptions regarding bryophyte dispersal potential in tropical environments, and suggests that the plight of this component of cryptic biodiversity is more dire than previously considered in light of accelerated forest fragmentation in the Amazon. [less ▲]

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See detailMaintenance of genetic and morphological identity in two sibling Syrrhopodon species (Calymperaceae, Bryopsida) despite extensive introgression.
Pereira, M.R.; Ledent, Alice ULiege; Mardulyn, P. et al

in Journal of Systematics and Evolution (2019), 57(4), 395-403

Bryophytes are a group of land plants in which the role of hybridization has long been challenged. Using genotyping by sequencing to circumvent the lack of molecular variation at selected loci previously ... [more ▼]

Bryophytes are a group of land plants in which the role of hybridization has long been challenged. Using genotyping by sequencing to circumvent the lack of molecular variation at selected loci previously used for phylogeny and morphology, we determine the level of genetic and morphological divergence and reproductive isolation between the sibling Syrrhopodon annotinus and S. simmondsii (Calymperaceae, Bryopsida) that occur in sympatry but in different habitats in lowland Amazonian rainforests. A clear morphological differentiation and a low (0.06), but significant Fst derived from the analysis of 183 single nucleotide polymorphisms were observed between the two species. Conspecific pairs of individuals consistently exhibited higher average kinship coefficients along a gradient of geographic isolation than interspecific pairs. The weak, but significant genetic divergence observed is consistent with growing evidence that ecological specialization can lead to genetic differentiation among bryophyte species. Nevertheless, the spatial genetic structures of the two species were significantly correlated, as evidenced by the significant slope of the Mantel test based on kinship coefficients between pairs of interspecific individuals and the geographic distance separating them. Interspecific pairs of individuals are thus more closely related when they are geographically closer, suggesting that isolation‐by‐distance is stronger than the interspecific reproductive barrier and pointing to interspecific gene flow. We conclude that interspecific introgression, whose role has long been questioned in bryophytes, may take place even in species wherein sporophyte production is scarce due to dioicy, raising the question as to what mechanisms maintain differentiation despite weak reproductive isolation. [less ▲]

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See detailNo borders during the post-glacial assembly of European bryophytes
Ledent, Alice ULiege; Désamoré, Aurélie; Laenen, Benjamin et al

in Ecology Letters (2019), 22(6), 973-986

Climatic fluctuations during the Last Glacial Maximum (LGM) exerted a profound influence on biodiversity patterns, but their impact on bryophytes, the second most diverse group of land plants, has been ... [more ▼]

Climatic fluctuations during the Last Glacial Maximum (LGM) exerted a profound influence on biodiversity patterns, but their impact on bryophytes, the second most diverse group of land plants, has been poorly documented. Approximate Bayesian computations based on coalescent simulations showed that the post-glacial assembly of European bryophytes involves a complex his- tory from multiple sources. The contribution of allochthonous migrants was 95–100% of expand- ing populations in about half of the 15 investigated species, which is consistent with the globally balanced genetic diversities and extremely low divergence observed among biogeographical regions. Such a substantial contribution of allochthonous migrants in the post-glacial assembly of Europe is unparalleled in other plants and animals. The limited role of northern micro-refugia, 2 which was unexpected based on bryophyte life-history traits, and of southern refugia, is consistent with recent palaeontological evidence that LGM climates in Eurasia were much colder and drier than what palaeoclimatic models predict. [less ▲]

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See detailA pilot workshop on Bryophytes at the Antananarivo Herbarium (TAN) revealed the presence of seven additional species for Madagascar
Reeb, C; Letsara, R; Andriamiarisoa, RL et al

in Candollea (2019)

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See detailDo mosses really exhibit so large distribution ranges? Insights from the integrative taxonomic study of the Lewinskya affinis complex (Orthotrichaceae, Bryopsida)
Vigalondo, B.; Garilleti, R.; Vanderpoorten, Alain ULiege et al

in Molecular Phylogenetics and Evolution (2019), 140

The strikingly lower number of bryophyte species, and in particular of endemic species, and their larger distribution ranges in comparison with angiosperms, have traditionally been interpreted in terms of ... [more ▼]

The strikingly lower number of bryophyte species, and in particular of endemic species, and their larger distribution ranges in comparison with angiosperms, have traditionally been interpreted in terms of their low diversification rates associated with a high long-distance dispersal capacity. This hypothesis is tested here with Lewinskya affinis (≡ Orthotrichum affine), a moss species widely spread across Europe, North and East Africa, southwestern Asia, and western North America. We tested competing taxonomic hypotheses derived from separate and combined analyses of multilocus sequence data, morphological characters, and geographical distributions. The best hypothesis, selected by a Bayes factor molecular delimitation analysis, established that L. affinis is a complex of no less than seven distinct species, including L. affinis s.str., L. fastigiata and L. leptocarpa, which were previously reduced into synonymy with L. affinis, and four new species. Discriminant analyses indicated that each of the seven species within L. affinis s.l. can be morphologically identified with a minimal error rate. None of these species exhibit a trans-oceanic range, suggesting that the broad distributions typically exhibited by moss species largely result from a taxonomic artefact. The presence of three sibling western North American species on the one hand, and four Old World sibling species on the other, suggests that there is a tendency for within-continent diversification rather than recurrent dispersal following speciation. The faster rate of diversification as compared to intercontinental migration reported here is in sharp contrast with earlier views of bryophyte species with wide ranges and low speciation rates. © 2019 Elsevier Inc. [less ▲]

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See detailPtychomitrium subcrispatum Thér. & P.de la Varde, an east southern African species excluded from the Cape Verde bryoflora
Sim-Sim, M.; Martins, A.; Rodrigues, A. S. B. et al

in Journal of Bryology (2019), 41

[No abstract available]

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See detailTo what extent are bryophytes efficient dispersers?
Vanderpoorten, Alain ULiege; Patino, J.; Désamoré, A. et al

in Journal of Ecology (2019)

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See detailResolution of the ordinal phylogeny of mosses using targeted exons from organellar and nuclear genomes
Liu, Y.; Johnson, M. G.; Cox, C. J. et al

in Nature Communications (2019), 10(1),

Mosses are a highly diverse lineage of land plants, whose diversification, spanning at least 400 million years, remains phylogenetically ambiguous due to the lack of fossils, massive early extinctions ... [more ▼]

Mosses are a highly diverse lineage of land plants, whose diversification, spanning at least 400 million years, remains phylogenetically ambiguous due to the lack of fossils, massive early extinctions, late radiations, limited morphological variation, and conflicting signal among previously used markers. Here, we present phylogenetic reconstructions based on complete organellar exomes and a comparable set of nuclear genes for this major lineage of land plants. Our analysis of 142 species representing 29 of the 30 moss orders reveals that relative average rates of non-synonymous substitutions in nuclear versus plastid genes are much higher in mosses than in seed plants, consistent with the emerging concept of evolutionary dynamism in mosses. Our results highlight the evolutionary significance of taxa with reduced morphologies, shed light on the relative tempo and mechanisms underlying major cladogenic events, and suggest hypotheses for the relationships and delineation of moss orders. © 2019, The Author(s). [less ▲]

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See detailUnder which humidity conditions are moss spore released? A comparison between species with perfect and specialized peristomes
Zanatta, F.; Vanderpoorten, Alain ULiege; Hedenäs, L. et al

in Ecology and Evolution (2018), 8

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See detailBryophytes of Kédougou (Eastern Senegal), with a key to the Fissidens of Senegal
Diop, D; Diop, D; Bruggeman-Nannenga, MA et al

in Journal of Bryology (2018), 40

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See detailBryophytes of Jaú National Park (Amazonas, Brazil): Estimating species detectability and richness in a lowland Amazonian megareserve
Sierra, A. M.; Vanderpoorten, Alain ULiege; Gradstein, S. R. et al

in Bryologist (2018), 121(4), 571-588

In the past decade, floristic studies have rebounded as checklists are fundamental for executing meta-analyses which address ecological, biogeographic and evolutionary questions of broad geographic scope ... [more ▼]

In the past decade, floristic studies have rebounded as checklists are fundamental for executing meta-analyses which address ecological, biogeographic and evolutionary questions of broad geographic scope. Despite the importance of checklists as baseline records of local diversity and distributions, few attempts have been made to quantify sampling effort and species detectability within and among study sites. Quantitative floristics, which combines the use of checklists with statistical methods for estimating local richness, is a promising method for characterizing the completeness of checklists especially for cryptic components of biodiversity. For bryophytes, quantifying levels of detectability among substrate types is of central importance, especially in tropical forests where much of their diversity is harbored in difficult to access habitats such as the tree canopy. In light of the need to establish quantifiable protocols of detectability in poorly studied tropical regions, we present a bryophyte checklist for the Jaú National Park (JNP), located in the heart of the Amazon, and estimate local species richness and detectability as it relates to five substrate types (epiphytes, epiphylls, epixylic, epipetric and soil). Identifications from 712 collections made during four excursions over the past decade to JNP revealed 150 species consisting of two new country records and five new state records, along with 20 rarely collected Amazonian endemics. Despite our intensive sampling, which included systematic canopy collections during one of the excursions, Chao richness index estimated that ca. 46 species (nearly one-third of those presently observed) remain undetected from JNP. Furthermore, levels of detectability among substrates varied widely, where observed epiphyte richness, in contrast to the other substrates types, most closely approximated the estimates. Our results illustrate the need for quantitative richness estimates as a means to increase the accuracy of checklist data, particularly when used in meta-analyses addressing global-scale questions. Copyright. © 2018 by The American Bryological and Lichenological Society, Inc. [less ▲]

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See detailBryophyte biogeography
Patino, J; Vanderpoorten, Alain ULiege

in Critical Reviews in Plant Sciences (2018)

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See detailHerbarium-based science in the twenty-first century
Besnard, G.; Gaudeul, M.; Lavergne, S. et al

in Botany Letters (2018), 165

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See detailIsothecium myosuroides var. brachythecioides (Dixon) Braithw. reinstated as a species, I. interludens Stirt.
Hodgetts, Nick; Vanderpoorten, Alain ULiege

in Journal of Bryology (2018), 40

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See detailGlobal Island Monitoring Scheme (GIMS): a proposal for the long‐term coordinated survey and monitoring of native island forest biota
Borges, PAV; Cardoso, P; Kreft, H et al

in Biodiversity and Conservation (2018), 27

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See detailEvolutionary origin of the latitudinal diversity gradient in liverworts
Laenen, B; Patino, J; Hagborg, A et al

in Molecular Phylogenetics and Evolution (2018), 127

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See detailTrees as habitat islands: temporal variation of alpha and beta diversity in epiphytic laurel forest bryophyte communities
Patino, Jairo; Gómez-Rodríguez, Carola; Pupo-Correia, Aida et al

in Journal of Biogeography (2018)

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See detailQuantification of complex modular architecture in plants.
Reeb, C; Kaandorp, J; Jansson, F et al

in New Phytologist (2018), 218

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See detailNew bryophyte records from Macaronesia
Dirkse, GM; Nieuwkoop, JAW; Vanderpoorten, Alain ULiege et al

in Cryptogamie Bryologie (2018), 39

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