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  • 1. Arup, Ulf
    et al.
    Ekman, Stefan
    Fröberg, Lars
    Frödén, Patrik
    Knutsson, Tommy
    Lättman, Håkan
    Södertörns högskola, Institutionen för livsvetenskaper, Biologi. Södertörns högskola, Institutionen för livsvetenskaper, Miljövetenskap.
    Lindblom, Louise
    Mattsson, Jan-Eric
    Södertörns högskola, Institutionen för livsvetenskaper, Biologi. Södertörns högskola, Institutionen för livsvetenskaper, Miljövetenskap.
    Thell, Arne
    Westberg, Martin
    Professor Ingvar Karnefelt - a birthday tribute2009Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 41, s. 453-456Artikkel i tidsskrift (Fagfellevurdert)
  • 2.
    Arup, Ulf
    et al.
    University of Lund.
    Ekman, Stefan
    University of Lund.
    Lindblom, Louise
    University of Lund.
    Mattsson, Jan-Eric
    University of Lund.
    High performance thin layer chromatography (HPTLC), an improved technique for screening lichen substances.1993Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 25, s. 61-71Artikkel i tidsskrift (Fagfellevurdert)
  • 3.
    Lorentsson, Susanne
    et al.
    Uppsala university.
    Mattsson, Jan-Eric
    Uppsala university.
    New reports of soredia dispersed by ants, Formica cunicularia1999Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 31, s. 204-207Artikkel i tidsskrift (Fagfellevurdert)
  • 4.
    Lättman, Håkan
    et al.
    Södertörns högskola, Institutionen för livsvetenskaper, Biologi. Södertörns högskola, Institutionen för livsvetenskaper, Miljövetenskap.
    Brand, Anneli
    Hedlund, Johanna
    Krikorev, Mikael
    Olsson, Niklas
    Södertörns högskola, Institutionen för livsvetenskaper.
    Robeck, Alexandra
    Södertörns högskola, Institutionen för livsvetenskaper.
    Rönnmark, Fredrik
    Matsson, Jan-Eric
    Generation time estimated to be 25-30 years in Cliostomum corrugatum (Ach.) Fr.2009Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 41, s. 557-559Artikkel i tidsskrift (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 5.
    Mattsson, Jan-Eric
    et al.
    Södertörns högskola, Institutionen för livsvetenskaper, Biologi. Södertörns högskola, Institutionen för livsvetenskaper, Miljövetenskap.
    Hansson, Anne-Charlotte
    Lindblom, Louise
    Genetic variation in relation to substratum preferences of Hypogymnia physodes2009Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 41, s. 547-555Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Genetic variability and its relationship to substratum preferences within and among populations of the sorediate foliose lichen Hypogymnia physodes was investigated using sequence variation in the complete nrDNA internal transcribed spacer (ITS) region. A few samples of the putatively closely related, sorediate, H. tubulosa were also included. Samples were collected from each tree species in study sites in Estonia, Finland, and Sweden. In total, DNA sequences from 104 individuals of H. physodes and 16 of H. tubulosa were obtained. A group I intron situated at the end of the small subunit (SSU) of the nrDNA was detected in both species. Within-species variability was observed in both species: fifteen haplotypes were found for H. physodes and seven for H. tubulosa for the combined alignment of the intron and the ITS. Possible recombination within the total gene fragment was detected and hence the different regions (intron, ITS1, 5.8S, ITS2) were analysed separately. They show a different degree of variability both between each other and between the species. The number of haplotypes of H. physodes in the four regions are 5, 5, 1, and 5 and for H. tubulosa 5, 2, 1 and 2, respectively. A statistical parsimony estimation resulted in two unconnected networks; one containing all the samples of H. physodes and one containing all H. tubulosa samples. It was not possible to show different potentials of the different haplotypes for establishment on different substrata as the network of H. physodes indicates recombination within the ITS region which may be frequent enough to make this primarily clonally reproducing species to behave like a sexual species.

  • 6.
    Mattsson, Jan-Eric
    et al.
    Södertörns högskola, Institutionen för livsvetenskaper.
    Lättman, Håkan
    Södertörns högskola, Institutionen för livsvetenskaper. Linköpings universitet.
    Milberg, Per
    Linköpings universitet.
    Rapid changes in the epiphytic macrolichen flora on sites in southern Sweden2006Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 38, s. 323-329Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A relatively quick and simple method is presented for monitoring changes in distribution and in site and substratum preferences of epiphytic macrolichens; the method also records the natural turnover of common species. Changes in the epiphytic lichen flora in southern Sweden were recorded at 64 sites in 1986 and again in 2003. In total 1990 observations of lichens were recorded on 15 tree species, mainly on trunks but also on branches up to 2 in above the ground. Almost all species showed a high turnover with regard to substratum, including very abundant species such as Hypogymnia physodes. Many of the species had changed substratum within their sites, possibly reflecting a general change in the ecological quality of sites. Canonical Correspondence Analysis was used to extract the variation in species composition over time, using 1685 records of 55 lichen species on 8 different substrata. Some species such as Hypogymnia tubulosa had increased in abundance whilst others such as Vulpicida pinastri had decreased.

  • 7.
    Mattsson, Jan-Eric
    et al.
    The Botanical Museum (Fytoteket), Uppsala University.
    Wedin, Mats
    Botany Department, The Natural History Museum, Cromwell Rd, London SW7 5BD, UK.
    A Re-Assessment of the Family Alectoriaceae1999Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 31, nr 5, s. 431-440Artikkel i tidsskrift (Fagfellevurdert)
  • 8.
    Mattsson, Jan-Eric
    et al.
    Uppsala university.
    Wedin, Mats
    The Natural History Museum, London .
    Phylogeny of the Parmeliaceae – DNA data versus morphological data1998Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 30, s. 463-472Artikkel i tidsskrift (Fagfellevurdert)
  • 9. Nordin, A
    et al.
    Mattsson, Jan-Eric
    Phylogenetic reconstruction of character development in Physciaceae2001Inngår i: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 33, s. 3-23Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A cladistic analysis of the Physciaceae, based on morphological and chemical data, is presented. In the resulting phylogenetic reconstruction two major clades are formed, one containing the foliose genera (Anaptychia, Dirinaria, Heterodermia, Hyperphyscia, Physcia, Phaeophyscia, Physconia, Pyxine) and the fruticose Tornabea, and the other containing the remaining, mainly crustose genera. Rinodina appears as paraphyletic with representatives both at the base of the tree, at the same level as the mio major clads and at the base of the crustose clade. Also Mobergia has a basal position. The characters used and their distribution in the phylogenetic trees are discussed as well as their significance for the identification of monophyletic groups. The history of the family is also briefly hinted at and characters of importance for the recognition of new genera are surveyed. Relevant publications and the variation in secondary chemistry are presented in tables.

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