| 1. |
- Sonesson, M, et al.
(författare)
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Short-term effects of enhanced UV-B and CO2 on lichens at different latitudes
- 1995
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Ingår i: Lichenologist. - 0024-2829. ; 27:6, s. 547-557
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Tidskriftsartikel (refereegranskat)abstract
- Interaction effects of UV-B and CO2 on three lichens species, Cladonia arbusculo, Cetraria islandica and Stereocaulon paschale, from two latitudinal sites, 68N and 56N, were studied in a laboratory experiment. The response of the plants was recorded by measuring their chlorophyll fluorescence. All species had a similar response to enhanced UV-B depending on the latitude from which the population came and the time of the season when they were sampled. Overall, there was a significant increase in photosystem II yield (as measured by a fluorescence technique) due to UV-B and no separate effect due to enhanced CO2, although there was a significant interaction between CO2 and UV-B. The increase due to UV-B was at the low CO2 level. There were also significant differences in response due to latitude. The results contradict our hypotheses that negative effects of UV-B would be larger in the North than in the South and that a negative response should be especially large during the early season.
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| 2. |
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| 3. |
- Arup, Ulf
(författare)
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A new taxonomy of the Caloplaca citrina group in the Nordic countries, except Iceland
- 2006
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Ingår i: Lichenologist. - 0024-2829. ; 38:1, s. 41294-41294
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Tidskriftsartikel (refereegranskat)abstract
- The Caloplaca citrina group in the Nordic countries, except Iceland, is analysed with regard to morphology, anatomy, ecology, and chemistry. Their genetic relationship is also analysed using the ITS ribosomal DNA gene. The results show that there are at least five species within what has been called C. citrina, of which four are closely related to one another and to several non-sorediate species. Three of these, C. citrina, C. flavocitrina and C. arcis have previously been recognized at specific or varietal level some time during the last two centuries, whereas the fourth species, C. dichroa, is described as new. The fifth species, C. phlogina, is not related to the other species but shows a close relationship to the Xanthoria candelaria group. The species are described and illustrated in colour. Distribution maps are given for the study area and a key to sorediate, yellow to orange species occurring in the Nordic countries, except Iceland, is also provided.
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| 4. |
- Arup, Ulf, et al.
(författare)
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A taxonomic revision of Caloplaca herbidella and C. furfuracea
- 2009
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Ingår i: Lichenologist. - 0024-2829. ; 41:5, s. 465-480
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Tidskriftsartikel (refereegranskat)abstract
- Caloplaca herbidella (Hue) H. Magn. and C. furfuracea H. Magn. are two isidiate, epiphytic species in the large genus Caloplaca. Caloplaca herbidella in a strict sense is normally grey and fertile with thick, somewhat coralloid isidia, but orange, sterile forms with thin isidia also occur. Caloplaca furfuracea is superficially similar morphologically to C. herbidella s. str. but has thinner, more granular isidia and generally a darker grey colour. Doubts have been raised as to whether C. furfuracea should be acknowledged as a proper species or incorporated in C. herbidella. Using morphometric methods and molecular analysis of the nrITS DNA gene we show that C. herbidella and C. furfuracea are two clearly separated species. Furthermore, the mainly sterile, orange form of C. herbidella can be regarded as a separate species that is here described as C. coralliza Arup & Åkelius. All three species are described in detail, including photographs and notes on their ecology. Finally, new distribution maps for Europe show that C. herbidella and C. coralliza are widespread in Europe, but the latter is probably less common than the former. Caloplaca furfuracea is clearly very rare in Europe with only few collections from Switzerland and Sweden, but seems to be more common in North America.
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| 5. |
- Arup, Ulf, et al.
(författare)
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A taxonomic study of Melanelixia fuliginosa in Europe
- 2011
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Ingår i: Lichenologist. - 0024-2829. ; 43:2, s. 89-97
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Tidskriftsartikel (refereegranskat)abstract
- For a long time it has been discussed as to whether Melanelixia fuliginosa comprises one or two species: one darker, mainly saxicolous, and one lighter, mainly corticolous. To settle the question, a morphometric and a molecular analysis were carried out and analyzed using a principal component analysis (PCA). The morphometric analysis indicates a differentiation in several characters between material previously recognized as subspecies fuliginosa and glabratula, but also a considerable overlap in some of them. The molecular analysis of the nrITS DNA gene reveals a clear division of the taxa. Specimens belonging to Melanelia fuliginosa fall out in two different clades, which have good bootstrap support, corresponding to the subspecies fuliginosa and glabratula. Accordingly, we propose that the subspecies should be acknowledged as separate species, Melanelixia fuliginosa (Fr. ex Duby) O. Blanco et al. and Melanelixia glabratula (Lamy) Sandler & Arup.
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| 6. |
- Arup, Ulf, et al.
(författare)
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Caloplaca erecta, a new subfruticose species from New Zealand
- 2000
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Ingår i: Lichenologist. - : Cambridge University Press (CUP). - 0024-2829. ; 32:4, s. 359-363
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Tidskriftsartikel (refereegranskat)abstract
- Caloplaca erecta Arup & H. Mayrhofer is described here as new to science. It belongs to a group of dwarf-fruticose species, but cannot be accommodated within any of the known species of that group. It forms dense cushions of erect lobes on siliceous rocks, and is known only from Mt. Maungatua. This is the second dwarf-fruticose species of Caloplaca in the Australasian area, in addition to C. cribosa. (C) 2000 The British Lichen Society.
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| 7. |
- Arup, Ulf, et al.
(författare)
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Caloplaca fuscorufa, a misunderstood species in northern Europe
- 2007
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Ingår i: Lichenologist. - 0024-2829. ; 39:5, s. 409-414
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Tidskriftsartikel (refereegranskat)abstract
- Caloplaca fuscorufa H. Magn. is a poorly known species that for a long time was known only from a single locality in Jämtland, northern Sweden, where it was collected in 1910. It has been suggested to be synonymous with C. crenularia (With.) J. R. Laundon, but has also been confused with C. exsecuta (Nyl.) Dalla Torre & Sarnth. We have compared the isotype of C. fuscorufa and material collected in Sweden, Norway and Svalbard with presumably related species, using morphology, anatomy and chemistry as well as molecular data. The results show that C. fuscorufa is a distinct species, differing from C. crenularia mainly in somewhat larger spores with wider septa, different colour of the apothecia and a more northern distribution. From C. exsecuta it differs mainly in chemistry and smaller spores with smaller septa. Caloplaca crenularia is shown to have a more southern distribution in Sweden than previously understood. Chemical data and a molecular analysis based on ITS data show that C. fuscorufa is related to C. crenularia and C. ammiospila, but clearly separated from these species.
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| 8. |
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| 9. |
- Arup, Ulf, et al.
(författare)
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High performance thin layer chromatography (HPTLC), an improved technique for screening lichen substances.
- 1993
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Ingår i: The Lichenologist. - : Cambridge University Press (CUP). - 0024-2829 .- 1096-1135. ; 25, s. 61-71
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Tidskriftsartikel (refereegranskat)abstract
- High performance thin layer chromatography (HPTLC) is a method that can be used for screening lichen substances. It is as simple to use as standard TLC, but has many advantages: It is more sensitive, it is possible to run more samples in a shorter period of time, and the amount of solvent used is much smaller. The material needed and the methods used are described in detail. Horizontal chromatogram development was used. Since two of the solvents used in system B have been substituted, and since the properties of the HPTLC plates are slightly different, our results are not entirely in accordance with the standardized TLC method. A revised table for the identification of 69 lichen substances (obtained from 62 taxa) is accordingly presented.
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| 10. |
- Arup, Ulf, et al.
(författare)
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Lecanora caledonica - a new species in the Lecanora intumescens group (Lecanoraceae) from north-western Europe
- 2023
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Ingår i: Lichenologist. - 0024-2829. ; 55:3-4, s. 107-114
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Tidskriftsartikel (refereegranskat)abstract
- Lecanora caledonica is described as new to science. Molecular analyses show that it belongs to the L. intumescens group. It is also rather similar in appearance to L. intumescens, but differs mainly chemically in containing only atranorin and an unknown UV+ ice blue substance. There are also anatomical and morphological differences to the other species of the group. The new species has a pronounced oceanic distribution and is so far known only from western Norway and Scotland.
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