Genetic and morphological variation in the circumpolar distribution range of<i>Sphagnum warnstorfii</i>: indications of vicariant divergence in a common peatmoss

Yousefi, Narjes; Mikulášková, Eva; Stenøien, Hans K.; Flatberg, Kjell Ivar; Košuthová, Alica; Hájek, Michal; Hassel, Kristian

doi:10.1093/botlinnean/boy086

Cited by 10 publications

(13 citation statements)

References 87 publications

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“…17. Specimens referred to Sphagnum warnstorfii differ from typical populations of this species which grow in taiga zone in having more ovate branch leaves with larger free ringed pores on the first quarter of convex side of leaf as it was pointed for "high arctic S. warnstorfii" by Yousefi et al (2019).…”

Section: A B F E C D G Hmentioning

confidence: 96%

Bryophytes of Dickson area, Western Taimyr – a model bryophyte flora for Asian arctic tundra

Fedosov

Ignatova

Bakalin

et al. 2020

Arctoa, a jornal of bryology

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Bryophyte flora of the Dickson village area was studied during five field seasons. The list includes 90 species and 7 infraspecific taxa of liverworts and 249 species and 2 varieties of mosses. This is the greatest number among local floras published for Asian Arctic. It exceeds previously published moss floras of the nearby areas by about hundred species. It is partly caused by application of new species concepts, which appeared as a result of revisions involving molecular phylogenetic data. However, it also demonstrates strong under-exploration, and, consequently, underestimation of bryophyte diversity and need in its conservation. The present study shows that the number of species in local floras does not decrease northward within the tundra zone. Moreover, bryophyte flora of the arctic tundra biome houses the previously neglected or only recently recognized taxonomic diversity. An annotated list of species is provided, аlong with comments on the problematic taxa and specimens. РезюмеБриофлора окрестностей пос. Диксон и расположенной в 17 км южнее бухты Медуза, изученная в течение пяти полевых сезонов, включает 90 видов и 7 внутривидовых таксонов печеночников и 249 видов мхов и по числу выявленных таксонов мохообразных превосходит все ранее опубликованные локальные бриофлоры азиатской Арктики. Представленный список снабжен комментариями к проблемным или интересным с точки зрения фитогеографии таксонам или образцам. Краткое сравнение с ранее опубликованными бриофлористическими исследованиями показывает, что в пределах тундровой зоны разнообразие мохообразных на уровне конкретных флор не уменьшается к северу. Хотя такое большое число выявленных видов, в том числе связанных с высокими широтами, во многом обусловлено таксономическими концепциями, появившимися в последние десятилетия, представляемые данные ставят вопросы сохранения биоразнообразия высокоширотной Арктики и дальнейшего изучения его бриофлоры.

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Section: A B F E C D G Hmentioning

confidence: 96%

Bryophytes of Dickson area, Western Taimyr – a model bryophyte flora for Asian arctic tundra

Fedosov

Ignatova

Bakalin

et al. 2020

Arctoa, a jornal of bryology

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“…High dispersibility leading to colonization may explain this, but the role of geographical isolation in driving speciation in bryophytes is not well-understood (but see Yousefi et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…High species diversity of Sphagnum is found in the boreal region, a paradox considering the short time since the last glacial maximum. High dispersibility leading to colonization may explain this, but the role of geographical isolation in driving speciation in bryophytes is not well‐understood (but see Yousefi et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Lately, investigating genetic variation has aided the identification of new species, even within common and well‐studied species such as S. magellanicum Brid. sensu lato (Hassel et al, 2018; Kyrkjeeide, Hassel, Flatberg, Shaw, Yousefi, & Stenoien, 2016; Shaw et al, 2022; Yousefi et al, 2019). Despite the effort to describe Sphagnum diversity, there are still unresolved taxonomical issues, even for species assessed in the IUCN Red List of threatened species (Gabriel & Sim‐Sim, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Short stories from Sphagnum of rare species, taxonomy, and speciation

Kyrkjeeide

Meleshko

Flatberg

et al. 2023

Ecology and Evolution

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Conserving species and their genetic variation are a global priority to safeguard evolutionary potential in a rapidly changing world. Species are fundamental units in research and nature management, but taxonomic work is increasingly undermined. Increasing knowledge on the species genetic diversity would aid in prioritizing conservation efforts. Sphagnum is a diverse, well-known bryophyte genus, which makes the genus suited to study speciation and cryptic variation. The species share specific characteristics and can be difficult to separate in the field. By combining molecular data with thorough morphological examination, new species have recently been discovered.Still, there are taxonomic uncertainties, even for species assessed on the IUCN Red List of threatened species. Here, we use molecular data to examine three rare species within the subgenus Acutifolia described based on morphological characters. All species have narrow distributions and limited dispersability. First, we confirm the genetic origin of S. skyense. Second, we show that S. venustum is a haploid species genetically distinct from morphologically similar species. Lastly, S. nitidulum was found to have a distinct haplotype, but cannot be genetically separated from other red Acutifolia species. We also found high genetic variation within red Acutifolia specimens, indicating the need of further morphological examination and possibly taxonomic revision.Until then, our results have shown that genetic data can aid in prioritizing targets of conservation efforts when taxonomy is unresolved. All three taxa should be further searched for by field biologists to increase knowledge about their distribution ranges.

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“…Since the Sphagnum species tend to hybridization (Ricca & Shaw, 2010;Meleshko et al, 2018), polyploidization (Såstad et al, 1999a;Shaw et al, 2012) and also are proved to bear signs of incomplete lineage sorting (Shaw & Goffinet, 2000;Meleshko et al, 2021), the molecular phylogenetic analyses are often complicated. The morphological delimitation of the closely related species is also problematic due to a noticeable variation in their morphology, which depend on the environmental conditions (Stenøien et al 1997;Såstad et al, 1999b;Yousefi et al 2019). Although several genetically sepa-rated Sphagnum species can overlap morphologically (S. medium Limpr.…”

Section: Introductionmentioning

confidence: 99%

On the morphological delimitation Of Sphagnum henryense

Shkurko

Mamontov

Fedosov

2022

Arctoa, a jornal of bryology

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Sphagnum henryense (subg. Sphagnum) differs from S. palustre in having abundant small pores on the dorsal surface of branch leaves. Recently studies usually consider it as a doubtful species or even merely a synonym of S. palustre. We revealed S. palustre-like plants, with numerous small round pores very similar to those of S. henryense in collection from Russian Far East, South Kuril Islands. The morphometric studies of these plants, along with S. henryense from other regions of Asia and North America and S. palustre from the same areas and Europe revealed statistically reliable differences in three traits of pores in the hyaline cells on abaxial branch leaf surface: (1) number, (2) length, (3) length to width ratio, and significant differences in (4) branch leaf breadth and (5) number of pores in stem cortex cells, distinguishing the henryense-morphotype. Such morphotypes are illustrated, discussed, and likely deserve a further studies. РезюмеSphagnum henryense (subg. Sphagnum) отличается от S. palustre наличием многочисленных мелких пор на дорсальной поверхности веточных листьев. В последнее время его часто рассматривают как сомнительный вид или даже синоним S. palustre. Недавно нами были обнаружены растения, похожие на S. palustre, с многочисленными мелкими круглыми порами, очень похожими на таковые у S. henryense в коллекции с острова Кунашир, Южные Курилы. Морфометрические исследования этих растений, наряду с S. henryense из других регионов Азии и Северной Америки, а также S. palustre из различных регионов, выявили статистически достоверные различия по трем признакам пор гиалиновых клеток на абаксиальной поверхности веточного листа: (1) количество, (2) длина, (3) отношение длины к ширине, а также значимые отличия по (4) ширине веточного листа и (5) количеству пор в клетках гиалодермиса стебля, отличающие "henryense-морфотип". Такие дальневосточные морфотипы проиллюстрированы, обсуждены и, на наш взгляд, заслуживают дальнейшего изучения.

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Genetic and morphological variation in the circumpolar distribution range ofSphagnum warnstorfii: indications of vicariant divergence in a common peatmoss

Cited by 10 publications

References 87 publications

Bryophytes of Dickson area, Western Taimyr – a model bryophyte flora for Asian arctic tundra

Bryophytes of Dickson area, Western Taimyr – a model bryophyte flora for Asian arctic tundra

Short stories from Sphagnum of rare species, taxonomy, and speciation

On the morphological delimitation Of Sphagnum henryense

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