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  • 1.
    Jägerbrand, Annika
    et al.
    Statens väg- och transportforskningsinstitut, Miljö, MILJÖ.
    Alatalo, Juha M.
    Uppsala Universitet.
    Kudo, Gaku
    Hokkaido University.
    Variation in responses to temperature treatments ex situ of the moss Pleurozium schreberi (Willd. ex Brid.) Mitt.originating from eight altitude sites in Hokkaido, Japan2014Inngår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 36, nr 3, s. 209-216Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Thermal acclimatisations are important for the survival and growth of individuals and populations but seldom studied for different populations of bryophytes. The aims of this study were to (I) investigate if responses to temperature treatments were independent of the site sampled or if the intra- and interpopulation variation in responses were larger than the responses to the temperature treatments (control, press, and pulse), and to (II) examine if experimental responses varied, depending on the sampled sites.

    We collected samples of the circumpolar bryophyte species, Pleurozium schreberi (Willd. ex Brid.) Mitt., originating from eight altitude sites on Mt. Oakan in Hokkaido, Japan, and exposed them to three different temperature treatments ex situ for four weeks. Thermal acclimatisation was estimated by measuring responses in growth length increase, biomass increase, number of branches, and the maximum quantum yield of PS II (Fv/Fm). We found that responses to temperature treatments were dependent of the site sampled, and that differences were most pronounced in the length increase. Results also shows that the responses to experimental treatments may differ between sites. Our results therefore raise important concerns regarding the general validity of both ex situ and in situ experiments when performed on a single or a limited number of sites.

  • 2.
    Jägerbrand, Annika K.
    Göteborg University.
    A new method for assessing dispersal and colonization of bryophytes2007Inngår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 29, nr 2, s. 133-134Artikkel i tidsskrift (Fagfellevurdert)
  • 3.
    Jägerbrand, Annika K.
    et al.
    Göteborgs Universitet.
    Molau, Ulf
    Göteborgs Universitet.
    Alatalo, Juha M
    Göteborgs Universitet.
    Responses of bryophytes to simulated environmental change at Latnjajaure, northern Sweden2003Inngår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 25, nr 3, s. 163-168Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We simulated a predicted environmental change in a subarctic-alpine plant community to study short-term growth in Hylocomium splendens, and three-year effects in abundance changes of the five most common bryophytes at Latnjajaure, northern Sweden. The experiment had a factorial design with increased temperature and nutrients, alone and in combination. Moss growth was measured during the 1995 growing season, and we measured species abundance before and after three years of environmental perturbation. The combined treatments of fertilizer and temperature enhancement caused a decreased growth in length and dry weight in H. splendens. There was a significant decrease in abundance of Rhytidium rugosum in the combined temperature and fertilizer treatment. The other four common bryophyte species (Aulacomnium turgidum, Dicranum groenlandicum, Hylocomium splendens, and Ptilidium ciliare) showed weaker, but not significant trends in the same direction. As the bryophytes are an important component of arctic and subarctic vegetation, we expect that they will play a key role in the impact of anticipated Global Change on the ecosystems.

  • 4.
    Korpelainen, Helena
    et al.
    University of Helsinki.
    Jägerbrand, Annika K.
    Statens väg- och transportforskningsinstitut, Miljö, MILJÖ.
    von Cräutlein, Maria
    University of Helsinki.
    Genetic structure of mosses Pleurozium schreberi (Willd. ex Brid.) Mitt. and Racomitrium lanuginosum (Hedw.) Brid. along altitude gradients in Hokkaido, Japan2012Inngår i: Journal of Bryology, ISSN 0373-6687, E-ISSN 1743-2820, Vol. 34, nr 4, s. 309-312Artikkel i tidsskrift (Fagfellevurdert)
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