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  • 1. Ahti, Teuvo
    et al.
    Mayrhofer, Helmut
    Schultz, Matthias
    Tehler, Anders
    Naturhistoriska riksmuseet, Enheten för botanik.
    Fryday, Alan M
    First supplement to the lichen checklist of South Africa2016Inngår i: Bothalia, African Biodiversity & Conservation Journal, Vol. 46, nr 1Artikkel i tidsskrift (Fagfellevurdert)
  • 2. 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 relationships2016Inngår i: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 65, s. 3-18Artikkel i tidsskrift (Fagfellevurdert)
  • 3. Alves-Araújo, Anderson
    et al.
    Swenson, Ulf
    Naturhistoriska riksmuseet, Enheten för botanik.
    Alves, Marccus
    A taxonomic survey of Pouteria (Sapotaceae) from the northern portion of the Atlantic rainforest of Brazil2014Inngår i: Systematic Botany, ISSN 0363-6445, E-ISSN 1548-2324, Vol. 39, nr 3, s. 915-938Artikkel i tidsskrift (Fagfellevurdert)
  • 4.
    Anderberg, Arne Alfred
    Naturhistoriska riksmuseet, Enheten för botanik.
    Proposal to conserve the name Adelostigma (Asteraceae: Inuleae)with a conserved type2015Inngår i: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 64, nr 2, s. 387-388Artikkel i tidsskrift (Fagfellevurdert)
  • 5. Andriambololonera, Sylvie Renée
    et al.
    Razafimandimbison, Sylvain
    Naturhistoriska riksmuseet, Enheten för botanik. Naturhistoriska riksmuseet, Forskningsavdelningen centralt.
    Mussaendeae-Sabiceeae clade (subfamily Ixoroideae)2022Inngår i: The new Natural History of Madagascar, USA: Princeton University Press, 2022, s. 756-758Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 6. Aptroot, André
    et al.
    Stapper, Norbert J.
    Košuthová, Alica
    Naturhistoriska riksmuseet, Enheten för botanik.
    van Herk, KCM
    Lichens as an indicator of climate and global change2021Inngår i: Climate change: observed impact on planet Earth / [ed] Letcher, T., Elsevier, 2021, s. 483-497Kapittel i bok, del av antologi (Fagfellevurdert)
  • 7. Arcadia, Linda in
    et al.
    Knudsen, Kerry
    Czech University of Life Sciences.
    Westberg, Martin
    Naturhistoriska riksmuseet, Enheten för botanik.
    (2341) Proposal to conserve the name Lichen fuscatus Scgrad. (Acarospora fuscata) against L. fuscatus Lam. with a conserved type (lichenised Ascomycota: Acarosporaceae)2015Inngår i: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 64, nr 1, s. 168-169Artikkel i tidsskrift (Fagfellevurdert)
  • 8. Ariyawansa, H.A
    et al.
    Hyde, K.D.
    Wedin, Mats
    Naturhistoriska riksmuseet, Enheten för botanik.
    Westberg, Martin
    Naturhistoriska riksmuseet, Enheten för botanik.
    Erratum to: Fungal Diversity Notes 111–252 - taxonomic and phylogenetic contributions to fungal taxa.2015Inngår i: Fungal diversity, ISSN 1560-2745, E-ISSN 1878-9129, Vol. 75, s. 275-277Artikkel i tidsskrift (Fagfellevurdert)
  • 9. Ariyawansa, H.A.
    et al.
    Hyde, K.D.
    Wedin, Mats
    Naturhistoriska riksmuseet, Enheten för botanik.
    Westberg, Martin
    Naturhistoriska riksmuseet, Enheten för botanik.
    Fungal Diversity Notes 111–252 - taxonomic and phylogenetic contributions to fungal taxa2015Inngår i: Fungal diversity, ISSN 1560-2745, E-ISSN 1878-9129, Vol. 75, s. 27-274Artikkel i tidsskrift (Fagfellevurdert)
  • 10. Armstrong, Kate E.
    et al.
    Stone, G. H.
    Nicholls, J. A.
    Valderama, E.
    Anderberg, Arne A.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Smedmark, Jenny
    Gautier, L.
    Naciri, Y
    Milne, R.
    Richardson, James E.
    Patterns of diversification amongst tropical regions compared: a case study in Sapotaceae.2014Inngår i: Frontiers in Genetics, E-ISSN 1664-8021, Vol. 5, nr 362Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Species diversity is unequally distributed across the globe,with the greatest concentration occurring in the tropics. Even within the tropics, there are significant differences in the numbers of taxa found in each continental region. Manilkara is a pantropical genus of trees in the Sapotaceae comprising c.78 species. Its distribution allows for biogeographic investigation and testing of whether rates of diversification differ amongst tropical regions. The age and geographical origin of Manilkara are inferred to determine whether Gondwanan break-up, boreotropical migration or long distance dispersal have shaped its current disjunct distribution. Diversification rates through time are also analyzed to determine whether the timing and tempo of speciation on each continent coincides with geoclimatic events. Bayesian analyses of nuclear (ITS) and plastid (rpl32-trnL,rps16-trnK,and trnS-trnFM) sequences were used to reconstruct a species level phylogeny of Manilkara and related genera in the tribe Mimusopeae. Analyses of the nuclear data using a fossil-calibrated relaxed molecular clock indicate that Manilkara evolved 32–29 million years ago (Mya) in Africa. Lineages within the genus dispersed to the Neotropics 26–18 Mya and to Asia 28–15 Mya. Higher speciation rates are found in the Neotropical Manilkara clade than in either African or Asian clades. Dating of regional diversification correlates with known palaeoclimatic events. In South America, the divergence between Atlantic coastal forest and Amazonian clades coincides with the formation of drier Cerrado and Caatinga habitats between them. In Africa diversification coincides with Tertiary cycles of aridification an duplif tof the east African plateaux. In South east Asia dispersal may have been limited by the relatively recent emergence of land in New Guinea and islands further east c.10 Mya.

  • 11. Atalahy, Anselme M.
    et al.
    Rakotonasolo, Franck
    Rabarimanarivo, Marina
    Ranarijaona, Hery Lisy
    Razafimandimbison, Sylvain
    Naturhistoriska riksmuseet, Enheten för botanik.
    Nouvelles espèces du genre Pyrostria (Rubiaceae, Vanguerieae) de Madagascar2021Inngår i: Candollea, ISSN 0373-2967, E-ISSN 2235-3658, Candollea, Vol. 76, nr 1, s. 1-12Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In the course of a taxonomic revision of the genus Pyrostria Comm. ex Juss. (Rubiaceae, Vanguerieae) in Madagascar, we describe five new species endemic from the Island: Pyrostria ambohitantelensis Atalahy, Rakotonas. & Razafim., Pyrostria ambrensis Atalahy, Rakotonas. & Razafim., Pyrostria betsomangensis Atalahy, Rakotonas. & Razafim., Pyrostria coriacea Atalahy, Rakotonas. & Razafim. and Pyrostria longicorollata Atalahy, Rakotonas. & Razafim. Each new species is provided with line drawings, a discussion on its morphological affinities and a risk of extinction assessment based on the IUCN Red List criteria.

  • 12. Atalahy, Anselme
    et al.
    Rakotonasolo, Franck
    Andriambololonera, Sylvie
    Rabarimanarivo, Marina
    Ranarijaona, Hery Lisy
    Un nouveau nom dans la tribu des Vanguerieae (Rubiaceae) de Madagascar2020Inngår i: Candollea, ISSN 0373-2967, E-ISSN 2235-3658, Vol. 75, nr 1, s. 71-73Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A variety of the Malagasy genus Canthium Lam. (Rubiaceae, Vanguerieae), Canthium perrieri var. louvelii Cavaco, is transferred to the genus Pyrostria Comm. ex Juss. because, like the typical variety already transferred in this genus, it shares its distinctive characters (inflorescences or solitary flowers involucrate). This taxon is further raised to species level, as it is morphologically distinct from Pyrostria perrieri (Cavaco) Razafim. et al. We provide the necessary new replacement name: Pyrostria orientalis A. Atalahy, Rakotanas. & Razafim., since the epithet louvelii is already occupied in Pyrostria.

  • 13. Baloch, Elisabeth
    et al.
    Gilenstam, Gunnar
    Wedin, Mats
    Naturhistoriska riksmuseet, Enheten för botanik.
    The relationships of Odontotrema (Odontotremataceae) and the resurrected Sphaeropezia (Stictidaceae) - new combinations and three new Sphaeropezia species.2013Inngår i: Mycologia, ISSN 0027-5514, E-ISSN 1557-2536, Vol. 105, nr 2, s. 384-397Artikkel i tidsskrift (Fagfellevurdert)
  • 14. Baloch, Elisabeth
    et al.
    Lumbsch, H. Thorsten
    Lücking, Robert
    Wedin, Mats
    Naturhistoriska riksmuseet, Enheten för botanik.
    New combinations and names in Gyalecta for former Belonia and Pachyphiale (Ascomycota, Ostropales) species2013Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 45, nr 6, s. 723-727Artikkel i tidsskrift (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 15. Baral, Hans-Otto
    et al.
    Kosonen, Timo
    Herbarium, Biodiversity Unit, University of Turku, FI-20014 Turku, Finland..
    Polhorský, Adam
    Stöckli, Elisabeth
    Huhtinen, Seppo
    Herbarium, Biodiversity Unit, University of Turku, FI-20014 Turku, Finland..
    Hansen, Karen
    Naturhistoriska riksmuseet, Enheten för botanik.
    Venturioscypha nigropila (Hyphodiscaceae, Helotiales) – a new genus and species from xeric Pinus bark2022Inngår i: Karstenia, ISSN 0453-3402, s. 28-48Artikkel i tidsskrift (Fagfellevurdert)
  • 16.
    Bauer, Harald
    et al.
    Landesverein für Höhlenkunde in Wien und Niederösterreich.
    Exel, Thomas
    Landesverein für Höhlenkunde in Wien und Niederösterreich.
    Oberender, Pauline
    Naturhistorisches Museum Karst und Höhlenkundliche Arbeitsgemeinschaft.
    Sjöberg, Rabbe
    P&G Group.
    Lundberg, Johannes
    Naturhistoriska riksmuseet, Enheten för botanik.
    Scheuerer, Manuela
    Die Gobholo-Höhle in Swasiland: Expedition in eine der längsten Granithöhlen der Welt2015Inngår i: Die Höhlen, ISSN 0018-3091, Vol. 66, nr 1-4, s. 27-42Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    A small part of the Gobholo cave in westernSwaziland (southern Africa) has been usedfor touristic adventure tours for a few years,but the cave has never been surveyed norinvestigated scientifically. An internationalteam of speleologists started exploring, surveyingand documenting the cave in early2014. So far, more than 1 km has been surveyed,making Gobholo cave one of theworld’s longest granite caves and severalcontinuations are still unexplored. The upperparts of the cave are located in a rockfalldeposit overlying the Gobholo river, whereasthe lower parts originated from in-situweathering of the archaic alkali feldspargranite. The river floods large parts of thecave during heavy rainfalls and is responsiblefor the partial removal of the weatheringmaterial out of the cave. Manifold and numerousflowstones (composed of opal-Aand pigotite) probably formed via microbialprocesses. The cave is also a habitat for variousanimal species, including bats, spidersand cave crickets. Archaeologic artefactsprobably dating back to the local Stone Ageand Iron Age bear evidence of a former culturaluse of the cave. A thermal spring wasfound and temperature, CO2 and radonmeasurements provide data about the caveclimate which is characterised by fairly goodventilation. The age of the cave is uncertainbut the only approximately dated archaeologicalartefacts suggest a minimum age of40,000 years.

  • 17.
    Beimforde, Christina
    et al.
    Courant Research Centre Geobiology, University of Göttingen, Goldschmidtstraße 3, 37077 Göttingen, Germany.
    Feldberg, Kathrin
    Systematic Botany and Mycology, Faculty of Biology, University of Munich (LMU), Menzinger Str. 67, 80638 Munich, Germany.
    Nylinder, Nylinder
    Naturhistoriska riksmuseet, Enheten för botanik.
    Rikkinen, Jouko
    Department of Biosciences, University of Helsinki, P.O. Box 65, FIN-00014 Helsinki, Finland.
    Tuovila, Hanna
    Department of Biosciences, University of Helsinki, P.O. Box 65, FIN-00014 Helsinki, Finland.
    Dörfelt, Heinrich
    Microbial Communication, Friedrich Schiller University Jena, Neugasse 25, 07743 Jena, Germany.
    Gube, Matthias
    Microbial Communication, Friedrich Schiller University Jena, Neugasse 25, 07743 Jena, Germany.
    Jackson, Daniel
    Courant Research Centre Geobiology, University of Göttingen, Goldschmidtstraße 3, 37077 Göttingen, Germany.
    Reitner, Joachim
    Courant Research Centre Geobiology, University of Göttingen, Goldschmidtstraße 3, 37077 Göttingen, Germany.
    Seyfullah, Leyla
    Courant Research Centre Geobiology, University of Göttingen, Goldschmidtstraße 3, 37077 Göttingen, Germany.
    Schmidt, Alexander
    Courant Research Centre Geobiology, University of Göttingen, Goldschmidtstraße 3, 37077 Göttingen, Germany.
    Estimating the Phanerozoic history of the Ascomycota lineages: Combining fossil and molecular data2014Inngår i: Molecular Phylogenetics and Evolution, ISSN 1055-7903, E-ISSN 1095-9513, nr 78, s. 386-398Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The phylum Ascomycota is by far the largest group in the fungal kingdom. Ecologically important mutualisticassociations such as mycorrhizae and lichens have evolved in this group, which are regarded as keyinnovations that supported the evolution of land plants. Only a few attempts have been made to date theorigin of Ascomycota lineages by using molecular clock methods, which is primarily due to the lack ofsatisfactory fossil calibration data. For this reason we have evaluated all of the oldest available ascomycetefossils from amber (Albian to Miocene) and chert (Devonian and Maastrichtian). The fossils representfive major ascomycete classes (Coniocybomycetes, Dothideomycetes, Eurotiomycetes, Laboulbeniomycetes,and Lecanoromycetes). We have assembled a multi-gene data set (18SrDNA, 28SrDNA, RPB1 andRPB2) from a total of 145 taxa representing most groups of the Ascomycota and utilized fossil calibrationpoints solely from within the ascomycetes to estimate divergence times of Ascomycota lineages with aBayesian approach. Our results suggest an initial diversification of the Pezizomycotina in the Ordovician,followed by repeated splits of lineages throughout the Phanerozoic, and indicate that this continuousdiversification was unaffected by mass extinctions. We suggest that the ecological diversity within eachlineage ensured that at least some taxa of each group were able to survive global crises and rapidlyrecovered.

    Fulltekst (pdf)
    fulltext
  • 18.
    Bengtson, Annika
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Anderberg, Arne A.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Species diversification in the Mediterranean genus Chiliadenus (Inuleae-Asteraceae)2018Inngår i: Plant Systematics and Evolution, ISSN 0378-2697, E-ISSN 1615-6110, Vol. 304, nr 7, s. 853-860Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Chiliadenus is a small genus in the Inuleae (Asteraceae), consisting of ten species with allopatric distributions along the southern edge of the Mediterranean Sea. The different species have restricted areas of distribution, with only one being more widely distributed. The first molecular phylogenetic study of the genus with complete sampling, as well as a biogeographic analysis of the origin and biogeographic patterns leading to the current diversity of Chiliadenus is presented. Results confirm Chiliadenus as monophyletic and placed as sister to Dittrichia. The ancestor of Chiliadenus is dated to have diverged from that of Dittrichia around 5.45 Ma ago, coinciding with the Messinian salinity crisis, whereas the Chiliadenus crown group is dated to 2.29 Ma, around 3 million years later. Ancestral area reconstructions show the crown group to likely have originated in the area around Morocco and northwestern Algeria, which is also the area where the early divergences have occurred. Chiliadenus has then later diverged and dispersed over the Mediterranean to its current distribution. The evolution of the Chiliadenus crown group coincides with the onset of the Mediterranean climate, and its evolution may be connected to the subsequent climatic changes.

  • 19.
    Bengtson, Annika
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Anderberg, Arne A.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Razafimandimbison, Sylvain G.
    Naturhistoriska riksmuseet, Enheten för botanik.
    The Malagasy enigmatic genus Apodocephala (Asteraceae), a new member of the tribe Athroismeae2021Inngår i: Willdenowia, ISSN 0511-9618, E-ISSN 1868-6397, Vol. 51, nr 2, s. 221-230Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Apodocephala is a small genus of nine species of shrubs and trees endemic to Madagascar and currently classified in the tribe Astereae (Asteraceae). However, its present tribal position has been questioned, as it lacks some of the salient morphological features of that tribe. This study includes for the first time DNA sequences from Apodocephala (two species including the type of the generic name) to test its phylogenetic position. Phylogenetic analyses based on sequence data from nuclear ribosomal (ETS and ITS) and plastid (ndhF and trnL–trnF) DNA regions, using Bayesian inference and maximum parsimony methods, strongly reject the placement of Apodocephala in the Astereae. Our results, instead, support its position as sister to the Malagasy monospecific genus Lowryanthus within the tribe Athroismeae. Morphological comparison of these sister genera reveal similarities in cypsela morphology, and the inclusion of Apodocephala in the subtribe Lowryanthinae is proposed here. The tribe Athroismeae is now represented by ten genera (Anisochaeta, Anisopappus, Apodocephala, Artemisiopsis, Athroisma, Blepharispermum, Centipeda, Leucoblepharis, Lowryanthus and Symphyllocarpus), six of which occur in Madagascar. The Malagasy Athroismeae occur in all Malagasy terrestrial ecosystems (rainforests, deciduous dry forests, thicket spiny forests and savannas) and are likely the result of multiple independent colonization events mostly from mainland Africa.

  • 20.
    Bengtson, Annika
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Englund, Markus
    Naturhistoriska riksmuseet, Enheten för bioinformatik och genetik.
    Pruski, John F.
    Anderberg, Arne Alfred
    Naturhistoriska riksmuseet, Enheten för botanik.
    Phylogeny of the Athroismeae (Asteraceae), with a new circumscription of the tribe2017Inngår i: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 66, nr 2, s. 408-420Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Athroismeae is a small tribe of the Asteraceae-Asteroideae, the members of which show considerable variation in morphology. A molecular phylogenetic study of the tribe is presented for the first time, based on plastid (ndhF, trnH-psbA, trnL-trnF) and nuclear data (ETS, ITS). The phylogenetic relationships between the different genera within Athroismeae are discussed, and in addition, three unispecific genera: Anisochaeta, Artemisiopsis and Symphyllocarpus as well as Duhaldea (Inula) stuhlmannii, all earlier placed in other tribes, are here shown to belong within Athroismeae. Symphyllocarpus is sister to Centipeda and the earlier Symphyllocarpinae includes Centipedinae in synonymy. Furthermore, Cardosoa and Philyrophyllum are found to be integrated within Anisopappus and their generic status cannot be maintained. An outline of an amended circumscription of the Athroismeae is presented, with three new combinations and a description of the new subtribe Lowryanthinae.

  • 21.
    Bengtson, Annika
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Nylinder, Stephan
    Naturhistoriska riksmuseet, Enheten för botanik.
    Karis, Per Ola
    Anderberg, Arne A.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Evolution and diversification related to rainfall regimes: diversification patterns in the South African genus Metalasia (Asteraceae-Gnaphalieae).2015Inngår i: Journal of Biogeography, ISSN 0305-0270, E-ISSN 1365-2699, Vol. 42, nr 1, s. 121-131Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Aim. The Cape region is known for its exceptional species richness, although much remains unknown regarding the appearance of the modern Cape flora. One explanation is that floral diversification was influenced by the establishment of winter rainfall/summer arid conditions hypothesized to have occurred towards the end of the Miocene. We studied the evolution and diversification of the plant genus Metalasia (Asteraceae–Gnaphalieae), with the aim of testing whether radiation patterns may have been influenced by the climatic changes.

    Location. South Africa, with emphasis on the south-west.

    Methods. The radiation of Metalasia was investigated using two approaches: a species diffusion approach, which estimated the ancestral areas by means of a relaxed random walk while sampling from extant distributions; and a discrete approach, in which distributions were defined according to the phytogeographical centres of the Cape region. Secondarily derived clock rates from an earlier Gnaphalieae study were used for calibration purposes.

    Results. Our analyses date Metalasia to approximately 6.9 Ma, after the Miocene–Pliocene boundary and the establishment of the winter rainfall/summer arid conditions. Metalasia consists of two sister clades: Clade A and Clade B. Clade B, which is endemic to the winter rainfall area, is estimated to have diversified c. 6.4 Ma, whereas Clade A, with a main distribution in the all-year rainfall area, is considerably younger, with a crown group age estimated to 3.3 Ma. Diversification rates suggest an early rapid speciation, with rates decreasing through time both for Metalasia and for clades A and B separately. Ancestral area estimations show a possible scenario for the radiation of Metalasia to its current diversity and distribution, with no conflict between results inferred from diffusion or discrete methods.

    Main conclusions. The diversification of Metalasia is estimated to have begun after the establishment of the winter rainfall/summer arid conditions, consistent with its radiation having been influenced by changes in the climatic regime.

  • 22.
    Bengtson, Annika
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Osborne, Jo
    Royal Botanic Gardens Kew, Richmond Surrey TW9 3AE U.K..
    Anderberg, Arne A.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Phylogeny of Anisopappus with species circumscriptions revisited (Asteraceae: Athroismeae)2021Inngår i: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 70, nr 2, s. 351-364Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Anisopappus (Asteraceae: Athroismeae) is a genus with its main distribution in Africa (one species also in Asia), currently considered to include around 21 species. A molecular phylogenetic study of Anisopappus is presented for the first time, based on plastid (ndhF, trnL-trnF, trnQ-rps16) and nuclear (ETS, ITS) data. Anisopappus is confirmed to be monophyletic, and species interrelationships are resolved. The results differ from earlier treatments based on morphology, and the phylogenetic analyses reveal a need for changes in species circumscriptions as compared to those of the most recent treatment. Consequently, many taxa currently treated as synonyms are here shown to represent separate species indicating that the genus includes well over 40 species. Distribution patterns now emerge where several clades are found to consist of species restricted to a particular geographical region. The Anisopappus of Madagascar, many of which were earlier placed in synonymy with species found on the African continent, are here shown to be endemic, and the results reveal a need for further studies of that group.

  • 23.
    Bennike, Ole
    et al.
    Geological Survey of Denmark and Greenland Øster Voldgade 10 DK‐1350 Copenhagen K Denmark.
    Colgan, William
    Geological Survey of Denmark and Greenland Øster Voldgade 10 DK‐1350 Copenhagen K Denmark.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Heiri, Oliver
    Department of Environmental Sciences University of Basel Klingelbergsstrasse 27 4056 Basel Switzerland.
    Lemdahl, Geoffrey
    Linnaeus University SE‐391 82 Kalmar Sweden.
    Wiberg‐Larsen, Peter
    Institute for Ecoscience, Aarhus University Vejlsøvej 25 DK‐8600 Silkeborg Denmark.
    Ribeiro, Sofia
    Geological Survey of Denmark and Greenland Øster Voldgade 10 DK‐1350 Copenhagen K Denmark.
    Pronzato, Roberto
    Dipartimento per lo Studio del Territorio dell’Ambiente e della Vita (DiSTAV) Università degli Studi di Genova Corso Europa 26 16132 Genova Italy.
    Manconi, Renata
    Dipartimento di Medicina Veterinaria Università di Sassari Via Vienna 2 07100 Sassari Italy.
    Bjørk, Anders A.
    Department of Geosciences and Natural Resource Management University of Copenhagen Øster Voldgade 10 DK‐1350 Copenhagen K Denmark.
    An Early Pleistocene interglacial deposit at Pingorsuit, North‐West Greenland2022Inngår i: Boreas, ISSN 0300-9483, E-ISSN 1502-3885Artikkel i tidsskrift (Fagfellevurdert)
  • 24. Bennike, Ole
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    High, Kirsty
    Korshöj, Joakim S.
    Lemdahl, Geoffrey
    Penkman, Kirsty
    Preece, Richard C.
    Rosenlund, Knud
    Viehlberg, Finn A.
    New interglacial deposits from Copenhagen, Denmark:marine Isotope Stage 72018Inngår i: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 48, s. 107-118Artikkel i tidsskrift (Fagfellevurdert)
  • 25. Bennike, Ole
    et al.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Lemdahl, Geoffrey
    Wiberg-Larsen, Peter
    A multiproxy macrofossil record of Eemian palaeoenvironments from Klaksvík, the Faroe Islands2018Inngår i: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 47, s. 106-113Artikkel i tidsskrift (Fagfellevurdert)
  • 26. Bergamini, Ariel
    et al.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hodgetts, Nick
    Lockhart, Nick
    van Rooy, Jacques
    South African National Biodiversity Institute,.
    Hallingbäck, Tomas
    Recommendations for the use of critical terms when applying IUCN redlistingcriteria to bryophytes2019Inngår i: Lindbergia, ISSN 0105-0761, E-ISSN 2001-5909Artikkel i tidsskrift (Fagfellevurdert)
  • 27. Bergamini, Ariel
    et al.
    Studer, Lisa
    Valentini, Maya
    Jacot, Katja
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Profitieren Moose von Biodiversitätsförderflächen im Landwirtschaftsgebiet?2017Inngår i: NL-Inside, Vol. 1//17, s. 17-20Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 28.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    ACTION NOW: Aufruf zu einer weltweit massiven Verstärkung der Anstrengungen gegen den Artenschwund2020Inngår i: Meylania, Vol. 65, s. 37-38Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 29.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    IUCN SSC Bryophyte Specialist Group, 2019 Report.2020Rapport (Annet vitenskapelig)
    Abstract [en]

    The mission of the IUCN SSC BryophyteSpecialist Group is to promote the explorationof bryological diversity across all geographicscales and its long-term conservation.

  • 30.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Pleurozia gigantea. Global redlist assessment2019Inngår i: IUCN Red List of Threatened Species, s. e.T67369777A67369790-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Pleurozia gigantea has a widespread distribution in the tropics, occurring in Africa, south and east Asia, and the Pacific Ocean region.Within its distribution range the species occurs in geographically isolated areas of hyper-oceanic or montane climate. Although the number of mature individuals is not known, it is very likely much higher than the thresholds for a threatened listing under criteria C and D. Globally, the population is likely to be declining, but probably not at a rate to qualify the species for listing as threatened.

  • 31.
    Bisang, Irene
    Naturhistoriska riksmuseet, Enheten för botanik.
    Upprop för att globalt massivt förstärka och effektivisera åtgärder för artbevarande2019Inngår i: Myrinia, ISSN 1102-4194, Vol. 29, s. 50-52Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 32.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Bergamini, Ariel
    Agricultural intensification, sustainable farming and the fate of arable bryophytes in Switzerland2021Inngår i: The Changing Status of Arable Habitats in Europe / [ed] Hurford C., Wilson P., Storkey J., Cham, Switzerland: Springer, 2021, s. 139-156Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    Land-use changes including agricultural intensification are major drivers of biodiversity loss. As other countries, Switzerland introduced agri-environment schemes (AES) to counteract declining agro-biodiversity. Among numerous bryophytes of the agricultural landscape, arable bryophytes have adapted to recurrent tillage. They are short-lived above-ground, while their diaspores may build up a persistent diaspore bank in the soil. We monitored the field hornwort and the Carolina hornwort, characteristic species of the Central European arable bryophyte flora over a period of almost three decades, and studied effects of Biodiversity Promoting Areas (BPAS), a key element of Swiss AES, on arable bryophyte diversity. Hornwort occurrences strongly declined, and stubble-fields left unprocessed until late autumn, the favourite habitat of arable specialist bryophytes, nearly disappeared from 1991 to 2018. The loss of suitable habitats follows from decreased cereal cultivation and direct post-harvest management. Different BPA-fallows, designed to promote birds, flowering plants, or ecosystem services, harboured arable bryophyte specialists, but their richness decreased with fallow age. Diaspore banks contained arable bryophyte specialists not occurring above-ground and may serve as a reservoir during unsuitable cultivation. Targeted modifications of current AES, aiming to maintain habitats favourable for arable bryophytes, are necessary to safeguard the typical arable bryophytes in the Swiss arable landscape.

  • 33.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Bergamini, Ariel
    Fördern die Massnahmen des Ökologischen Leistungsnachweises die Ackermoose im Schweizer Mittelland?2022Inngår i: N L Inside, Vol. 1/22, s. 20-24Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [de]

    Ähnlich wie die Wildkräuter in Äckern sind auch die typischen, hochspezialisieren Ackermoose stark gefährdet und im Rückgang begriffen. Biodiversitätsförderflächen könnten dazu beitragen, ihren Rückgang zu stoppen. Entscheidend für den Erhalt der Ackermoose im Schweizer Kulturland ist jedoch, dass genügend und sorgfältig ausgewählte Getreidestoppelfelder nicht vor Ende Oktober gepflügt oder anderweitig bearbeitet werden. 

  • 34.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Ehrlén, Johan
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Life history characteristics and historical factors are important to explain regional variation in reproductive traits and genetic diversity in perennial mossesInngår i: Annals of Botany, ISSN 0305-7364, E-ISSN 1095-8290Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background and aims Plants have evolved an unrivalled diversity of reproductive strategies, including variation in the degree of sexual versus clonal reproduction. This variation has important effects on the dynamics and genetic structure of populations. We examined the association between large-scale variation in reproductive patterns and intraspecific genetic diversity in two moss species where sex is manifested in the dominant haploid generation and sex expression is irregular. We predicted that in regions with more frequent realised sexual reproduction, populations should display less skewed sex ratios, more often express sex, and have higher genetic diversity than in regions with largely clonal reproduction.

    Methods We assessed reproductive status and phenotypic sex in the dioicous long-lived Drepanocladus trifarius and D. turgescens, in 248 and 438 samples across two regions in Scandinavia with frequent or rare, respectively, realised sexual reproduction. In subsets of the samples, we analysed genetic diversity using nuclear and plastid sequence information and identified sex with a sex-specific molecular marker in non-reproductive samples.

    Key results Contrary to our predictions, sex ratios did not differ between regions, genetic diversity did not differ in D. trifarius and was higher in the region with rare sexual reproduction in D. turgescens. Supporting our predictions, relatively more samples expressed sex in D. trifarius in the region with frequent sexual reproduction. Overall, samples were mostly female. Degree of sex expression and genetic diversity differed between sexes.

    Conclusions Sex expression levels, regional sex ratios and genetic diversity were not directly associated with regional frequency of realised sexual reproduction, and relationships and variation patterns differed between species. We conclude that a combination of species-specific life histories such as longevity, overall degree of successful sexual reproduction and recruitment, and historic factors, are important to explain this variation. Our data on haploid-dominated plants significantly complement plant reproductive biology.

  • 35.
    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 reproduction2015Inngår i: Annals of Botany, ISSN 0305-7364, E-ISSN 1095-8290Artikkel i tidsskrift (Fagfellevurdert)
    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

  • 36.
    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 mosses2014Inngår i: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, Vol. 174, s. 163-172Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 37.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hallingbäck, Thomas
    Bryophyte Specialist Group2015Rapport (Annet vitenskapelig)
    Abstract [en]

    The Species Survival Commission (SSC), a science-based network comprising over 9,000 volunteer experts deployed across more than 130 Specialist Groups, Red List Authorities and Task Forces, all working together towards achieving the vision of “A world that values and conserves present levels of biodiversity,” presents its annual report for 2014. 

  • 38.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hallingbäck, Tomas
    Bryophyte Specialist Group. In "2015 Annual Report of the Species Survival Commission and the Global Species Program"2016Inngår i: Species, ISSN 1016-927x, s. 70-71Artikkel i tidsskrift (Annet vitenskapelig)
  • 39.
    BISANG, IRENE
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    HEDENÄS, LARS
    Naturhistoriska riksmuseet, Enheten för botanik.
    Agricultural management, bedrock, and vulnerability of sexual reproduction to climate change affect the occurrence of a European near-endemic moss2022Inngår i: Bryophyte Diversity and Evolution, ISSN 2381-9677, Vol. 45, nr 1, s. 176-187Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We investigated whether the European near-endemic moss Drepanocladus lycopodioides has declined in its core distributionarea in the southern Baltic Sea region and explored potential explanations for this. First, we re-visited sites with documentedrecords from 1854 to 1957 in the Stockholm archipelago and nearby mainland in southern Sweden. Second, we comparedthe numbers and distributions of Swedish occurrences, their habitats, and substrates up to 1950 (289 herbarium records),and from 1951 onwards (347) using different map layers. Third, we explored whether inter-annual variation in reproductiveperformance was related to moisture conditions at five sites on an island in the Stockholm archipelago during nine years. Weestimated moisture conditions based on precipitation data and dry days during the time when fertilization occurs in the yearprior to sporophyte maturation. Drepanocladus lycopodioides has strongly decreased in intensively managed agriculturallandscapes but remains frequent in natural or semi-natural habitats on limestone. Sporophyte development varied betweenyears and depended on the weather condition during the fertilization period. Climate forecasts for the study area predict longerdry spells during late spring to late summer, which coincides with the timing of sexual branch initiation and fertilization inthe species. We expect that sporophyte production will likely decrease in the future, which will affect the species’ abilities tore-colonize spots where it vanishes during years with poor growth conditions.

  • 40.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Agricultural management, bedrock, and vulnerability of sexual reproduction to climate change affect the occurrence of a European near-endemic moss2023Inngår i: Bryophyte Diversity and EvolutionArtikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We investigated whether the European near-endemic moss Drepanocladus lycopodioides has declined in its core distribution area in the southern Baltic Sea region and explored potential explanations for this. First, we re-visited sites with documented records from 1854 to 1957 in the Stockholm archipelago and nearby mainland in southern Sweden. Second, we compared the numbers and distributions of Swedish occurrences, their habitats, and substrates up to 1950 (289 herbarium records), and from 1951 onwards (347) using different map layers. Third, we explored whether inter-annual variation in reproductive performance was related to moisture conditions at five sites on an island in the Stockholm archipelago during nine years. We estimated moisture conditions based on precipitation data and dry days during the time when fertilization occurs in the year prior to sporophyte maturation. Drepanocladus lycopodioides has strongly decreased in intensively managed agricultural landscapes but remains frequent in natural or semi-natural habitats on limestone. Sporophyte development varied between years and depended on the weather condition during the fertilization period. Climate forecasts for the study area predict longer dry spells during late spring to late summer, which coincides with the timing of sexual branch initiation and fertilization in the species. We expect that sporophyte production will likely decrease in the future, which will affect the species’ abilities to re-colonize spots where it vanishes during years with poor growth conditions.

  • 41.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Drepanocladus turgescens (T. Jensen) Broth. doch im Engadin2017Inngår i: Meylania, ISSN 1018-8142, Vol. 59, s. 9-13Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 42.
    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 lycopodioides2015Inngår i: Botany 2015. Science and Plants for People. Abstracts. / [ed] Anonymous, 2015Konferansepaper (Annet vitenskapelig)
    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.

  • 43.
    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 lycopodioides2013Inngår i: International journal of plant sciences, ISSN 1058-5893, E-ISSN 1537-5315, Vol. 174, nr 5, s. 733-739Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 44.
    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?2015Inngår i: Melting Pot, Swedish Museum of Natural History, Abstracts: https://vega.nrm.se/vanstermenyn/forskningochsamlingar/meltingpot/2015.9654.html, 2015Konferansepaper (Annet vitenskapelig)
    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.

     

     

  • 45.
    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 fertilization2015Inngår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 37Artikkel i tidsskrift (Fagfellevurdert)
  • 46.
    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-Protokoll2015Inngår i: Meylania, Vol. 55, artikkel-id 29-31Artikkel i tidsskrift (Annet vitenskapelig)
  • 47.
    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?2017Inngår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820Artikkel i tidsskrift (Fagfellevurdert)
  • 48.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Hedenäs, Lars
    Naturhistoriska riksmuseet, Enheten för botanik.
    Ehrlén, Johan
    Sex expression and genotypic sex ratio vary with region and environment in the wetland moss Drepanocladus lycopodioides2020Inngår i: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, Vol. 192, nr 2, s. 421-434Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Sex ratio variation is common among organisms with separate sexes. In bryophytes, sex chromosome segregation at meiosis suggests a balanced progeny sex ratio. However, most bryophyte populations exhibit female-biased phenotypic sex ratios based on the presence of reproductive structures on gametophytes. Many bryophyte populations do not form sexual organs, and genotypic sex ratio variation in such populations is mostly unknown. We tested sex expression, and phenotypic and genotypic sex ratios against environmental parameters in natural populations of the unisexual wetland moss Drepanocladus lycopodiodes at 11 sites in each of three regions in southern Sweden. We identified sex in 660 individual ramets, based on sexual structures, when present, or with a specifically designed molecular marker, when absent. All regions exhibited a female bias in phenotypic and genotypic sex  atios. Sex ratio biases and sex expression differed between regions. Sex ratios were less male-biased in larger patches. Wetter patches exhibited a stronger female bias in genotypic sex ratio and lower sex expression. This is the first evidence of environmental effects on genotypic sex ratio in mosses. A higher frequency of females in wet patches could be due to higher female resource demands for sporophyte production or higher male sensitivity to wetness. A higher incidence of females than males in moister sites aligns with female flowering plants, but differs from reproductive bryophytes in drier environments. Taken together with previous results, our data indicate that sex ratio variation and its drivers differ among species, their life histories and environments.

  • 49.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Lienhard, Luc
    Beiträge zur bryofloristischen Erforschung der Schweiz – Folge 17: Ephemerum recurvifolium2022Inngår i: Meylania, ISSN 1018-8142, Vol. 69, s. 5-6Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    A new find of the Critically Endangered arable specialist moss Ephemerum recurvifolium in Switzerland, new to Ct. Bern

  • 50.
    Bisang, Irene
    et al.
    Naturhistoriska riksmuseet, Enheten för botanik.
    Lienhard, Luc
    Bergamini, Ariel
    Effects of land use practices on arable bryopytes in the Swiss lowlands - a 30-year monitoring study using hornworts amodel organisms.2017Rapport (Annet (populærvitenskap, debatt, mm))
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