Integrated analysis of intraspecific diversity in the bipolar moss Roaldia revoluta (Mitt.) P.E.A.S. Câmara &amp; M. Carvalho-Silva (Bryophyta) in Antarctica

Câmara, Paulo Eduardo Aguiar Saraiva; Valente, Daiane Valente; Amorim, Eduardo Toledo de; Henriques, Diego Knop; Carvalho‐Silva, Micheline; Convey, Peter; Stech, Michael

doi:10.1007/s00300-018-2437-8

Cited by 6 publications

(10 citation statements)

References 44 publications

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“…After the publication of Ochyra et al (2008) Antarctic bryophyte monograph, there was a general belief in Brazil that little has remained to be investigated concerning the Antarctic vegetation. However, the application of modern DNA tools in Brazil's national research community has revealed many novelties, including a new genus (Câmara et al 2017), new occurrences and new relationships among species (Câmara et al 2018a; Suárez et al 2019), and also the effects of harsh environmental conditions on morphology (Câmara et al 2018b).…”

Section: Brazilian Botany In Antarcticamentioning

confidence: 99%

180 years of Botanical Investigations in Antarctica and the Role of Brazil

Câmara

Carvalho‐Silva

2020

Acta Bot. Bras.

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Botany is one of the oldest sciences done above the 60°S parallel with more than 180 years passing since the first professional botanist collected plants in Antarctica. Far from being a barren place, plants constitute an important part of polar ecosystems. Brazil is one of only 29 countries in the world with consultative status and to currently develop botanical studies in Antarctica. We discuss the importance of polar science to Brazil and the role that Brazil has in the international austral-polar scientific community, as well as the importance of its newly inaugurated scientific station.

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Section: Brazilian Botany In Antarcticamentioning

confidence: 99%

180 years of Botanical Investigations in Antarctica and the Role of Brazil

Câmara

Carvalho‐Silva

2020

Acta Bot. Bras.

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“…Longton 1988, Buryová & Shaw 2005, Hebel et al 2012, Hesse et al 2012, Daniëls et al 2013). On the other hand, bipolarity could represent an artifact due to extreme environmental conditions in both polar regions, with non-related taxa displaying similar morphologies in the Arctic and the Antarctic (Câmara et al 2018b). The use of molecular data is therefore indispensable for investigating bipolarity, along with a (re)assessment of morphological variation.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we aim to 1) test the monophyly and bipolarity of R. revoluta based on samples from its entire distribution area, 2) re-evaluate the status of R. dolomitica , 3) re-evaluate the morphological variation in Antarctica reported in Câmara et al (2018b) in comparison with morphological variation in the Northern Hemisphere and the molecular variation worldwide and 4) compare intraspecific molecular and morphological variation with that in other bipolar species.…”

Section: Introductionmentioning

confidence: 99%

Revisiting the bipolarity of Roaldia revoluta (Mitt.) P.E.A.S. Câmara & Carv.-Silva (Bryophyta, Pylaisiaceae)

et al. 2023

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The occurrence of species in both polar regions (bipolarity) is a common phenomenon in the Antarctic flora. Considering the high morphological variation in polar regions due to extreme conditions, the use of molecular tools is indispensable for testing whether Arctic and Antarctic populations indeed belong to the same species. However, few phylogeographic studies of bipolar bryophytes have been conducted so far, especially when comparing molecular and morphological variation. Here, we assess the bipolarity and intraspecific variation of Roaldia revoluta, a strictly bipolar species of pleurocarpous mosses. Phylogenetic analyses based on ITS sequences clearly resolve R. revoluta as monophyletic and confirm its bipolar distribution pattern. Low intraspecific molecular variation in the markers ITS/26S and rpl16 was observed, and most specimens from both polar regions belong to a single haplotype, making it difficult to infer the origin and dispersal routes between both polar regions of R. revoluta. Morphometric analysis furthermore suggests that there are no significant morphological differences among populations from both polar regions and that morphological variation is mainly influenced by local environmental conditions. Our data do not unequivocally support the recent separation of the former intraspecific taxon Hypnum revolutum var. dolomiticum at the species level as Roaldia dolomitica.

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“…Bryophytes are widely distributed globally and, although the greatest diversity is found in humid and shaded habitats, they are also well represented in extreme environments such as deserts and alpine and polar regions, including Antarctica (Buck & Goffinet 2000, Ochyra et al 2008. Today, ∼116 species of mosses from 17 families are known from Antarctica (Ochyra et al 2008, Câmara et al 2019.…”

Section: Introductionmentioning

confidence: 99%

Patterns of moss richness in Admiralty Bay, King George Island, cannot be explained by geological or ornithogenic drivers alone

et al. 2022

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We set out to document the diversity and distribution of bryophytes in Admiralty Bay and thereby enable the identification of patterns in local diversity and their possible drivers. Combining data extracted from different sources and recent collections, we documented the presence of 63 species. Similarity analyses of moss species diversity in relation to underlying geology and ornithogenic influence identified an identical cophenetic correlation coefficient of 0.744 for both factors. The Sørensen index was < 0.6, indicating that the groups share < 60% of the species recorded. The data showed that the selected filters (ornithogenic soils, non-ornithogenic soils and different geological extracts) did not underlie consistent species groupings, and we conclude that other environmental and topographical factors are likely to be responsible for shaping the moss community structure in Admiralty Bay. To enable effective management of Antarctic Specially Managed Area (ASMA) No. 1 and Antarctic Specially Protected Area (ASPA) No. 128, robust assessments of the local ecosystem and biodiversity are necessary to assist in the decision-making processes mandated under the Antarctic Treaty System, one of whose founding principles is the preservation of the Antarctic ecosystem.

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Integrated analysis of intraspecific diversity in the bipolar moss Roaldia revoluta (Mitt.) P.E.A.S. Câmara & M. Carvalho-Silva (Bryophyta) in Antarctica

Cited by 6 publications

References 44 publications

180 years of Botanical Investigations in Antarctica and the Role of Brazil

180 years of Botanical Investigations in Antarctica and the Role of Brazil

Revisiting the bipolarity of Roaldia revoluta (Mitt.) P.E.A.S. Câmara & Carv.-Silva (Bryophyta, Pylaisiaceae)

Patterns of moss richness in Admiralty Bay, King George Island, cannot be explained by geological or ornithogenic drivers alone

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