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  • 1. Alonso, Marta
    et al.
    Jiménez, Juan A.
    Nylinder, Stephan
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Cano, Maria J.
    Disentangling generic limits in Chionoloma, Oxystegus, Pachyneuropsis and Pseudosymblepharis (Bryophyta: Pottiaceae): An inquiry into their phylogenetic relationships2016Ingår i: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 65, s. 3-18Artikel i tidskrift (Refereegranskat)
  • 2.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Ehrlén, Johan
    Korpelainen, Helena
    University of Helsinki.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    No evidence of sexual niche partitioning in a dioecious moss with raresexual reproduction2015Ingår i: Annals of Botany, ISSN 0305-7364, E-ISSN 1095-8290Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background and Aims. Roughly half of the species of bryophytes have separate sexes (dioecious) and half are hermaphroditic (monoecious). This variation has major consequences for the ecology and evolution of the different species. In some sexually reproducing dioecious bryophytes, sex ratio has been shown to vary with environmental conditions. This study focuses on the dioecious wetland moss Drepanocladus trifarius, which rarely produces sexual branches or sporophytes and lacks apparent secondary sex characteristics, and examines whether genetic sexes exhibit different habitat preferences, i.e. whether sexual niche partitioning occurs.

    Methods. A total of 277 shoots of D. trifarius were randomly sampled at 214 locations and 12 environmental factors were quantified at each site. Sex was assigned to the individual shoots collected in the natural environments, regardless of their reproductive status, using a specifically designed molecular marker associated with female sex.

    Key Results. Male and female shoots did not differ in shoot biomass, the sexes were randomly distributed with respect to each other, and environmental conditions at male and female sampling locations did not differ. Collectively, this demonstrates a lack of sexual niche segregation. Adult genetic sex ratio was female-biased, with 28 females for every male individual.

    Conclusions. The results show that although the sexes of D. trifarius did not differ with regard to annual growth, spatial distribution or habitat requirements, the genetic sex ratio as nevertheless significantly female-biased. This supports the notion that factors other than sex-related differences in reproductive costs and sexual dimorphism can also drive the evolution of biased sex ratios in plants

  • 3.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Ehrlén, Johan
    Persson, Christin
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Family affiliation, sexratio and sporophyte frequency in unisexual mosses2014Ingår i: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, Vol. 174, s. 163-172Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Patterns of sex expression and sex ratios are key features of the life histories of organisms. Bryophytes are the only haploid-dominant land plants. In contrast with seed plants, more than half of bryophyte species are dioecious, with rare sexual expression and sporophyte formation and a commonly female-biased sex ratio. We asked whether variation in sex expression, sex ratio and sporophyte frequency in ten dioecious pleurocarpous wetland mosses of two different families was best explained by assuming that character states  evolved: (1) in ancestors within the respective families or (2) at the species level as a response to recent habitat conditions. Lasso regression shrinkage identified relationships between family membership and sex ratio and sporophyte frequency, whereas environmental conditions were not correlated with any investigated reproductive trait. Sex ratio and sporophyte frequency were correlated with each other. Our results suggest that ancestry is more important than the current environment in explaining reproductive patterns at and above the species level in the studied wetland mosses, and that mechanisms controlling sex ratio and sporophyte frequency are phylogenetically conserved. Obviously, ancestry should be considered in the study of reproductive character state variation in plants.

  • 4.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Infraspecific sex ratio variation and its predictors in mosses – the case of the wetland moss Drepanocladus lycopodioides2015Ingår i: Botany 2015. Science and Plants for People. Abstracts. / [ed] Anonymous, 2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Sex ratio variation is a common but unexplained phenomenon of many species with chromosomal sex determination, including many bryophytes. Expressed sex ratio variation could be related to environmental conditions in a few mosses investigated to date. However, many bryophyte populations are non-fertile during their entire life cycle and intraspecific genetic sex ratio variation remains highly unexplored in natural populations. Drepanocladus lycopodioides, a pleurocarpous wetland moss with a distribution largely confined to Western Eurasia, rarely to occasionally forms sexual organs. It belongs to the majority of bryophytes that exhibits a female bias in expressed sex ratio. We applied a novel approach to sex individual shoots irrespective of their reproductive state using a specifically designed female-targeting molecular marker. We demonstrated that the bias in sex expression corresponds to a genetic female bias in the European adult population. Here, we investigated three regional populations of D. lycopodioides in its core distribution area. We asked whether haplotype diversity (H), sex expression (SE), genetic sex ratios, and sporophyte frequency varied within and among regions, whether these characteristics were related with each other, and / or to environmental parameters. Levels of H differed among regions and were positively related to habitat patch size. H was unequally partitioned between the sexes and was associated with estimated regional sporophyte frequency. Recorded plot-wise sporophyte frequency was generally very low in all regions. Overall genetic sex ratio was female-biased in all regions. Sex expression and genetic sex ratio varied strongly within regions (SE 0 –75%), with 27% of the plots lacking sex organs and 78% of the plots one-sexed, but differences among regions were non-significant. While no sex expression occurred in habitats deeper than 25cm, genetic sex ratio was not related to the measured environmental parameters.

  • 5.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Males Are Not Shy in the Wetland Moss Drepanocladus lycopodioides2013Ingår i: International journal of plant sciences, ISSN 1058-5893, E-ISSN 1537-5315, Vol. 174, nr 5, s. 733-739Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Premise of research. Maintenance of dioecious and monoecious sexual systems at nearly equal frequencies, infrequent sexual expression, and distinctly female-skewed sex ratios among the dioecious species are reproductive characteristics of bryophytes, which are otherwise unusual among embryophytes. Most sex ratio assessments to date have relied on gametophytes forming sexual organs, and how these reflect genetic genders is largely unresolved.

    Methodology. For the European wetland moss Drepanocladus lycopodioides, we ask whether the adult expressed sex ratio is more strongly female biased than the “true” population sex ratio based on genetically male and female plants, i.e., whether males exhibit a lower sex expression rate than females (shy males). We assess expressed sex ratio on the basis of sex expression in individually scored herbarium specimens. We directly and on a large geographic scale assess nonexpressed sex ratio, for the second time in a moss, by sexing individual shoots from nonexpressing specimens using a molecular sex marker.

    Pivotal results. On the basis of the female and male frequencies in these two data sets and the overall proportion of expressing specimens, we estimate the European population sex ratio as 2.6 : 1 (female to male). All three sex ratios are significantly female skewed and do not significantly differ from each other, indicating that there is no gender difference in sex expression rates.

    Conclusions. These results and previous data for Drepanocladus trifarius show that males are not shy in the two wetland mosses of markedly different habitats.

  • 6.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Mass occurrence of springtails on a moss cushion – what are they doing?2015Ingår i: Melting Pot, Swedish Museum of Natural History, Abstracts: https://vega.nrm.se/vanstermenyn/forskningochsamlingar/meltingpot/2015.9654.html, 2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    The motile spermatozoids of bryophytes can swim up to a few centimetres. They require free water to fertilize the egg of the female organs, which sit on plants separate from the males in more than 50% of the species. When the sex organs are produced on different plants, this presents a serious obstacle to successful fertilization. The problems are overcome by a variety of mechanisms. Some of the more spectacular include spermatozoid transport up to at least several decimetres by water movement, by water drops spread from splash-cups surrounding the male organs up to two meters, by ejection up to15 centimetres into the air, or by having dwarf males that grow directly on the female plants. Here we report on another special kind of spermatozoid transfer that we came across during fieldwork in 2014, namely by micro-arthropods. Bryophyte fertilization mediated by animals was suggested more than a century ago, and was recently shown to occur in experimental settings. However, our observation is likely one of the first made directly in nature.

     

     

  • 7.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Mass-occurrence of springtails on Tortula cernua: A field-observation ofpossible animal-mediated fertilization2015Ingår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 37Artikel i tidskrift (Refereegranskat)
  • 8.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Sammelst du Moose oder Flechten auf deinen Auslandreisen? – Gedanken zum Nagoya-Protokoll2015Ingår i: Meylania, Vol. 55, artikel-id 29-31Artikel i tidskrift (Övrigt vetenskapligt)
  • 9.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Cronberg, Nils
    Can the meiotic sex ratio explain the sex ratio bias in adult populations in the dioicous moss Drepanocladus lycopodioides?2017Ingår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820Artikel i tidskrift (Refereegranskat)
  • 10. Buchbender, Volker
    et al.
    Hespanhol, Helena
    Krug, Michael
    Sérgio, Cecília
    Séneca, Ana
    Maul, Karola
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Quandt, Dietmar
    Phylogenetic reconstructions of the Hedwigiaceae reveal cryptic speciation and hybridisation in Hedwigia2014Ingår i: Bryophyte Diversity and Evolution, ISSN 2381-9677, Vol. 36, s. 1-21Artikel i tidskrift (Refereegranskat)
  • 11. Draper, Isabel
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Stech, Michael
    Patiño, Jairo
    Werner, Olaf
    González-Mancebo, J. M.
    Sim-Sim, Manuela
    Lopes, Tina
    Ros, Rosa María
    How many species of Isothecium(Lembophyllaceae, Bryophyta) are there in Macaronesia? A survey usingintegrative taxonomy2015Ingår i: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, Vol. 177, s. 418-438Artikel i tidskrift (Refereegranskat)
  • 12. Draper, Isabel
    et al.
    Mazimpaka, Vicente
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Molecular andmorphological circumscription of Brachytheciumcoruscum as a separate taxon from Brachytheciumalbicans (Brachytheciaceae, Bryophyta)2014Ingår i: Phytotaxa, ISSN 1179-3155, E-ISSN 1179-3163, Vol. 158, s. 182-194Artikel i tidskrift (Refereegranskat)
  • 13.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Amblystegiaceae (introduction and keys), Cratoneuron, Palustriella, Platydictya (H. A. Crum & L. Hedenäs), Campyliadelphus, Campylium, Drepanocladus, Pseudocalliergon, Sanionia, Conardia (H. A. Crum & L. Hedenäs), Campylophyllum, Calliergonaceae (whole family)2014Ingår i: Flora of North America, north of Mexico. Volume 28. Bryophyta, Part 2 / [ed] Flora of North America Editorial Committee, New York, Oxford: Oxford University Press, 2014Kapitel i bok, del av antologi (Refereegranskat)
  • 14.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Brachythecium tauriscorum Molendo, a widely distributed Arctic-alpine species2017Ingår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820Artikel i tidskrift (Refereegranskat)
  • 15.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Intraspecific diversity matters in bryophyte conservation – ITS and rpl16 variation in European mosses2016Ingår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 38, s. 173-182Artikel i tidskrift (Refereegranskat)
  • 16.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Intraspecific genetic variation in selected mosses of Scandinavian interglacial refugia suggests contrasting distribution history patterns2014Ingår i: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, Vol. 176, s. 295-310Artikel i tidskrift (Refereegranskat)
  • 17.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Molecular andmorphological incongruence among the genera around Sarmentypnum (Bryophyta: Calliergonaceae)2015Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde, ISSN 0029-5035, Vol. 100, s. 279-292Artikel i tidskrift (Refereegranskat)
  • 18.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Rhytidium rugosum (Bryophyta) colonized Scandinaviafrom at least two glacial refugial source populations2015Ingår i: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, nr 179, s. 635-657Artikel i tidskrift (Refereegranskat)
  • 19.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Southern Scandinavianlowland populations of Rhytidium rugosum(Bryophyta, Rhytidiaceae) differ significantly from those in the mountains2014Ingår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 36, s. 1-14Artikel i tidskrift (Refereegranskat)
  • 20.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Styv kalkmossa och andra kalkmossor i Sverige2015Ingår i: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 109, s. 94-104Artikel i tidskrift (Övrig (populärvetenskap, debatt, mm))
  • 21.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Three molecular markers suggest different relationships among three Drepanocladus species (Bryophyta: Amblystegiaceae)2017Ingår i: Plant Systematics and Evolution, ISSN 0378-2697, E-ISSN 1615-6110, Vol. 303, s. 521-529Artikel i tidskrift (Refereegranskat)
  • 22.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Tortella rigens (Bryophyta, Pottiaceae): relationships, regional variation, and conservation aspects2015Ingår i: Plant Systematics and Evolution, ISSN 0378-2697, E-ISSN 1615-6110Artikel i tidskrift (Refereegranskat)
  • 23.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Världens nordligaste lokaler för sandnäbbmossa2014Ingår i: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 108, s. 4-10Artikel i tidskrift (Övrig (populärvetenskap, debatt, mm))
  • 24.
    Hedenäs, Lars
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Are morphology andenvironment correlated with male dwarfism in pleurocarpous mosses?2015Ingår i: Arctoa: A Journal of Briology, ISSN 0131-1379, Vol. 24, s. 362-374Artikel i tidskrift (Refereegranskat)
  • 25.
    Hedenäs, Lars
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Brukar du samla mossor när du reser utomlands?2015Ingår i: Myrinia, ISSN 1102-4194, Vol. 25, nr 1Artikel i tidskrift (Övrig (populärvetenskap, debatt, mm))
    Abstract [en]

    The 'Nagoya Protocol' and its implications on collecting bryophytes abroad are discussed

  • 26.
    Hedenäs, Lars
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Infraspecific diversity in a spore-dispersed species with limited distribution range2015Ingår i: Systematics and Biodiversity, ISSN 1477-2000, E-ISSN 1478-0933, Vol. 13, s. 17-27Artikel i tidskrift (Refereegranskat)
  • 27.
    Hedenäs, Lars
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Désamoré, A.
    Laenen, Benjamin
    Papp, Beata
    Quandt, Dietmar
    González-Mancebo, J. M.
    Patiño, Jairo
    Vanderpoorten, Alain
    Stech, Michael
    Three species for theprice of one within the moss Homalotheciumsericeum s.l.2014Ingår i: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 63, s. 249-257Artikel i tidskrift (Refereegranskat)
  • 28.
    Hedenäs, Lars
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Heinrichs, Jochen
    Schmidt, Alexander R.
    Bryophytes of the Burmese amber forest: Amending and expanding the circumscription of the Cretaceous moss genus Vetiplanaxis2014Ingår i: Review of Palaeobotany and Palynology, ISSN 0034-6667, E-ISSN 1879-0615, Vol. 209, s. 1-10Artikel i tidskrift (Refereegranskat)
  • 29.
    Hedenäs, Lars
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Korpelainen, Helena
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Identifying sex in non-fertile individuals of the moss Drepanocladus turgescens (Bryophyta: Amblystegiaceae) using a novel molecular approach2016Ingår i: Journal of plant research, ISSN 0918-9440, E-ISSN 1618-0860, Vol. 129, s. 1005-1010Artikel i tidskrift (Refereegranskat)
  • 30.
    Hedenäs, Lars
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Reisborg, C.
    Hallingbäck, T.
    Nationalnyckeln till Sveriges flora och fauna. Bladmossor: Skirmossor-baronmossor. Bryophyta: Hookeria-Anomodon2014Bok (Refereegranskat)
  • 31. Heinrichs, Jochen
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Schäfer-Verwimp, Alfons
    Feldberg, Kathrin
    Schmidt, Alexander R.
    An in situ preserved moss community in Eocene Baltic amber2014Ingår i: Review of Palaeobotany and Palynology, ISSN 0034-6667, E-ISSN 1879-0615, Vol. 210, s. 113-118Artikel i tidskrift (Refereegranskat)
  • 32. Heinrichs, Jochen
    et al.
    Scheben, Armin
    Bechteler, Julia
    Lee, Gaik Ee
    Schäfer-Verwimp, Alfons
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Singh, Hukam
    Pócs, Tamas
    Nascimbene, Paul C.
    Peralta, Denilson F.
    Renner, Matt
    Schmidt, Alexander R.
    Crown group Lejeuneaceae and pleurocarpous mosses in Early Eocene (Ypresian) Indian amber2016Ingår i: PLOS ONE, E-ISSN 1932-6203, Vol. 11, nr 5, s. 1-15, artikel-id e156301Artikel i tidskrift (Refereegranskat)
  • 33. Heinrichs, Jochen
    et al.
    Schäfer-Verwimp, Alfons
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Ignatov, Michael S.
    Schmidt, Alexander R.
    An acrocarpous moss in Cretaceous amber from Myanmar2014Ingår i: Cretaceous research (Print), ISSN 0195-6671, E-ISSN 1095-998X, Vol. 51, s. 260-265Artikel i tidskrift (Refereegranskat)
  • 34. Hugunnot, Vincent
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Arvernella microclada Hugonnot & Hedenäs (Amblystegiaceae), a new minute species from France, requiring a separate genus2015Ingår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 37, s. 184-191Artikel i tidskrift (Refereegranskat)
  • 35. Huttunen, Sanna
    et al.
    Ahonen, I.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Laaka-Lindberg, Sanna
    Vänni, J.
    Sammalretki Ahvenanmalle keväällä 20132014Ingår i: Bryobrotherella, ISSN 1456-2766, Vol. 17, s. 114-135Artikel i tidskrift (Övrig (populärvetenskap, debatt, mm))
  • 36.
    Ivarsson, Magnus
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi. Nordic Center for Earth Evolution (NordCEE).
    Gustavsson, Lena
    Naturhistoriska riksmuseet, Enheten för zoologi.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Kronestedt, Torbjörn
    Naturhistoriska riksmuseet, Enheten för zoologi.
    Lundberg, Johannes
    Naturhistoriska riksmuseet, Enheten för botanik.
    Norbäck Ivarsson, Lena
    Södertörn University.
    Sallstedt, Therese
    Naturhistoriska riksmuseet, Enheten för paleobiologi. Nordic Center for Earth Evolution (NordCEE).
    Scheuerer, Manuela
    Sweco Rail.
    Thureborn, Olle
    Stockholm University.
    Wedin, Mats
    Naturhistoriska riksmuseet, Enheten för botanik.
    Unikt ekosystem i tunnelbanan vid Kungsträdgården2017Ingår i: Fauna och flora : populär tidskrift för biologi, ISSN 0014-8903, Vol. 112, nr 1, s. 2-9Artikel i tidskrift (Övrig (populärvetenskap, debatt, mm))
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  • 37. Jacobson, Conny
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Campylium longicuspis (Lindb. & Arnell) Hedenäs (Bryophyta, Amblystegiaceae), another Arctic moss in the northern Scandinavian mountain range2015Ingår i: Lindbergia, ISSN 0105-0761, E-ISSN 2001-5909, Vol. 38, s. 17-19Artikel i tidskrift (Refereegranskat)
  • 38. Kooijman, Annemieke
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Mettrop, Ivan
    Cusell, Casper
    Calliergon megalophyllum rediscovered in the Netherlands after 50 years: comparison to Swedish habitats2015Ingår i: Lindbergia, ISSN 0105-0761, E-ISSN 2001-5909, Vol. 38, s. 20-29Artikel i tidskrift (Refereegranskat)
  • 39. Lönnell, Niklas
    et al.
    Hallingbäck, Tomas
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Bestämningsnyckel till släkten inom egentliga bladmossor. Bryophyta: Bryopsida: BuxbaumiaAnomodon2016Bok (Övrigt vetenskapligt)
  • 40. Norhazrina, Nik
    et al.
    Vanderpoorten, Alain
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Patiño, Jairo
    What are the evolutionary mechanisms explaining the similar species richness patterns in tropical mosses? Insights from the phylogeny of the pantropical genus Pelekium2016Ingår i: Molecular Phylogenetics and Evolution, ISSN 1055-7903, E-ISSN 1095-9513, Vol. 105, s. 139-145Artikel i tidskrift (Refereegranskat)
  • 41. Orgaz, J. David
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Yamaguchi, Tomio
    Brachythecium complexum J.D.Orgaz, sp. nov., a new species from Japan2016Ingår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 38, s. 63-66Artikel i tidskrift (Refereegranskat)
  • 42. Patino, Jairo
    et al.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Dirkse, Gerard
    Bjarnason, Agust H.
    Ah-Peng, Claudine
    Vanderpoorten, Alain
    Baker’s law and the island syndromes in bryophytes2013Ingår i: Journal of Ecology, ISSN 0022-0477, E-ISSN 1365-2745, Vol. 101, s. 1245-1255Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    1. The evolution of island syndromes has long served as a model to understand the mechanisms accounting for phenotypic differentiation. Combining literature data with actual observations, we determine whether typical syndromes such as the loss of dispersal power and the bias towards selfcompatibility s law) apply to vagile organisms, using bryophytes as a model.

    2. The life-history traits (LHTs) observed in oceanic island floras were statistically different from those observed on continents, evidencing the evolution of island syndromes. In contrast, LHTs of continental and continental island floras were similar, pointing to differences in migration intensity between continents, continental islands and oceanic islands.

    3. The proportion of bisexual species was significantly higher on oceanic islands than on continents. A significant proportion of species that are unisexual or bisexual on continents shifted towards exclusive bisexuality on oceanic islands, suggesting that Baker’s law applies to bryophytes. The underlying mechanisms, however, probably differ from in situ selection for selfing.

    4. The proportion of species producing specialized asexual diaspores, which are assumed to play a role in short-distance dispersal (SDD), was higher on oceanic islands than on continents. The proportion of species producing spores, which are involved in long-distance dispersal (LDD), exhibited the reverse trend, suggesting a shift in the prevalent reproductive strategy to favour SDD on oceanic islands. Approximately 50% of the species, however, maintained the ability to produce sporophytes on oceanic islands, and the relative frequency of fertile shoots within collections of four model species was even higher on islands than on continents.

    5. Synthesis. Bryophytes exhibit typical island syndromes, indicating that migration rates between oceanic islands and continents are not sufficient to prevent the effects of genetic drift and contradicting the view that the sea does not impede migration in the group. Significant shifts in life-history traits (LHTs) towards increased production of specialized asexual diaspores and decreased sporophyte production on oceanic islands indeed point to a global loss of long-distance dispersal (LDD) ability. The maintenance of traits characteristic for LDD in a large number of species has, however, substantial consequences for our understanding of island plant evolution, and in particular, for our vision of islands as evolutionary dead ends.

  • 43. Petersen, Ævar
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Jónsdóttir, Kristín
    Stefánsson, Róbert A.
    ϸórisson, Skarpehéðinn G.
    Vatnamýs á Íslandi2016Ingår i: Náttúrufræðingurinn, ISSN 0028-0550, Vol. 86, nr 1-2, s. 28-41Artikel i tidskrift (Refereegranskat)
  • 44. Rams, Susana
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Werner, Olaf
    Ros, Rosa María
    Nuevos datos sobre la presencia de Pseudotaxiphyllum laetevirens en España2014Ingår i: Boletín de la Sociedad Española de Briología, Vol. 42-43, s. 19-24Artikel i tidskrift (Övrigt vetenskapligt)
  • 45. Sim-Sim, Manuela
    et al.
    Ruas, Sara
    Fontinha, Susana
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Sérgio, Cecília
    Lobo, Carlos
    Bryophyte conservation on a North Atlantic hotspot: threatened bryophytes in Madeira and Selvagens Archipelagos (Portugal)2014Ingår i: Systematics and Biodiversity, ISSN 1477-2000, E-ISSN 1478-0933, Vol. 123, s. 315-330Artikel i tidskrift (Refereegranskat)
  • 46. Vanderpoorten, Alain
    et al.
    Patiño, Jairo
    Dirkse, Gerard
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Early divergence of anAzorean endemic species in the moss genus Rhynchostegiella(Brachytheciaceae)2015Ingår i: Phytotaxa, ISSN 1179-3155, E-ISSN 1179-3163, Vol. 210, s. 60-69Artikel i tidskrift (Refereegranskat)
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