| 1. |
- Almered Olsson, Gunilla, 1951, et al.
(författare)
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Variation in Life History Traits of Gentiana nivalis (Gentianaceae) in Alpine and Sub-alpine Habitats in the Norwegian Mountains – Implications for Biodiversity in relation to Environmental Change
- 2015
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Ingår i: Annales Botanici Fennici. - : Finnish Zoological and Botanical Publishing Board. - 0003-3847 .- 1797-2442. ; 52:3-4, s. 149-159
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Tidskriftsartikel (refereegranskat)abstract
- The alpine gentian, Gentiana nivalis, is an obligate annual. Because of its complete population turnover every year, it is likely to be more responsive to environmental shifts than are perennials, and also likely to undergo more rapid genetic change in response to selection pressure. The detected morphological differentiation between habitats was related to different proportions of spring- and autumn-germinating individuals with a larger proportion of winter annuals in the subalpine habitats. The spring-germinating annuals that have shorter time for development and have a shorter stature can still develop at the alpine sites where competition is weaker. The subalpine habitats are all semi-natural, shaped by livestock grazing and human activities related to summer farming. Declining human impact is leading to successional changes in the mountain landscape. The future of G. nivalis in the light of current trends in landscape development and climate change is discussed.
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| 2. |
- Backéus, Ingvar
(författare)
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Production and depth distribution of fine roots in a boreal open bog
- 1990
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Ingår i: Annales Botanici Fennici. - 0003-3847 .- 1797-2442. ; 27, s. 261-265
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Tidskriftsartikel (refereegranskat)abstract
- The production of fine roots in originally root-free ingrowth cores was studied in an ombrotrophic mire ecosystem in central Sweden (14°42'N, 60°10'E). The estimated production values, which should be considered conservative , were 51 g.m-2 in hummocks and 86 g.m-2 in lawns (= upper hollow level). This represents 38% of the total measured production of vascular plants (increment in coarse roots not included) in hummocks and lawns, respectively. In the first year of study more than 50% of the fine root standing crop was found above 10 cm depth. In the second year, which was very dry, the roots penetated significantly deeper.
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| 3. |
- Bakker, Jan P., et al.
(författare)
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Long-term effects of scrub clearance and litter removal on the re-establishment of dry alvar grassland species
- 2012
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Ingår i: Annales Botanici Fennici. - 0003-3847 .- 1797-2442. ; 49:1-2, s. 21-30
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Tidskriftsartikel (refereegranskat)abstract
- Many characteristic dry alvar grassland species disappear after cessation of livestock grazing as a result of encroachment by Juniperus communis. We studied the re-establishment of these species after scrub clearance with and without the removal of the layer of litter and mosses in long-term (14 years) permanent plots. Most of the species belonging to the community species pool of dry alvar grassland species before clearance were found in permanent plots between 2 and 14 years after the clearance. A large part originated from vegetative spread of already occurring species in the established vegetation in the surroundings. Only a small part of the long-term persistent soil seed bank resulted in the re-establishment of alvar species. There was no significant difference in the traits soil seed bank, seed weight and long-distance dispersal by wind, dung or fur of animals of established and non-established species. Removal of litter and mosses positively affected the re-establishment of alvar species.
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| 4. |
- Bergfur, J, et al.
(författare)
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Phenological changes within a growth season in two semi-natural pastures in southern Sweden
- 2004
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Ingår i: Annales Botanici Fennici. - 0003-3847 .- 1797-2442. ; 41:1, s. 15-25
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Tidskriftsartikel (refereegranskat)abstract
- Phenological changes within a growth season were investigated in two grazed, semi-natural grasslands in southern Sweden. On four occasions during the growth season, two independent observers recorded plant frequency and percentage cover. The vegetation data sets were analysed with ordination methods. The temporal changes were highly significant, but accounted for only a small part of the total variation in the data. Most species had early maxima, regarding both cover and frequency. There were differences in temporal pattern between the two grasslands. In a xeric area, the vegetation underwent a major change sometime in August, between survey-visit three and four. In a mesic area, the vegetation changed throughout the study period but least so during August. Therefore, phenological changes can be manifested in different ways, even within the same geographic region. Species-wise ordination scores highlighted those species whose records might be most affected by phenological patterns, information which is valuable when evaluating data collected in Scandinavian grasslands.
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| 5. |
- Ecke, Frauke, et al.
(författare)
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Succession on a land uplift coast in relation to plant strategy theory
- 2000
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Ingår i: Annales Botanici Fennici. - 0003-3847 .- 1797-2442. ; 37:3, s. 163-171
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Tidskriftsartikel (refereegranskat)abstract
- Plant strategies under succession were evaluated for communities on rising seashores of the northern Gulf of Bothnia, Sweden, representing sites of primary succession. The succession could not be explained by Grime's CSR model. Early successional stages were neither characterized by high incidence of ruderals as proposed for secondary successions, nor by the dominance of stress tolerators, as proposed for primary successions. Short-lived species were almost totally absent. Instead, the shore habitat was characterized by species with an ability to tolerate and vegetatively recover from disturbance. The way in which different species experience one and the same form of stress or disturbance is an important reason why the classification on the basis of stress and disturbance seems to be insufficient to explain the course of this succession. Dominants of early and late successional stages differed with respect to root system, breeding system, leaf longevity and growth form (graminioid, herb).
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| 6. |
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| 7. |
- Frisch, Andreas, et al.
(författare)
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Additions to the calicioid flora of Japan and Korea, with the descriptions of two new species
- 2014
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Ingår i: Annales Botanici Fennici. - : Finnish Zoological and Botanical Publishing Board. - 0003-3847 .- 1797-2442. ; 51, s. 189-194
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Tidskriftsartikel (refereegranskat)abstract
- Two new species of calicioid fungi are described, Phaeocalicium triseptatum Tibell and Sphinctrina intermedia Tibell. While P. triseptatum is only known from Hokkaido, Japan, S. intermedia is known from Hokkaido and Korea. Sphinctrina leucopoda as reported from Korea in the literature is misidentified S. intermedia. The genus Microcalicium is reported as new to Japan with one species, M. arenarium. Phaeocalicium flabelliforme is reported as new to Asia (Japan). Chaenothecopsis savonica is reported as new to Japan and Sphinctrina tubaeformis as new to Hokkaido.
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| 8. |
- Frisch, Andreas, et al.
(författare)
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Herpothallon inopinatum (Arthoniaceae), a new lichen species from Mexico
- 2014
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Ingår i: Annales Botanici Fennici. - : Finnish Zoological and Botanical Publishing Board. - 0003-3847 .- 1797-2442. ; 51, s. 63-68
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Tidskriftsartikel (refereegranskat)abstract
- Herpothallon inopinatum Frisch & G. Thor sp. nova (Arthoniaceae) is described from Chiapas, Mexico. It is the second species of Herpothallon known with mature ascospores besides H. fertile. It differs from H. fertile in smaller asci immersed in the thallus instead of strongly protruding barrel-shaped thallus warts, smaller bean-shaped Herpothallon inopinatum most closely resembles H. pustulatum, but differs in the absence of pustules. The closely related H. rubrocinctum has distinct bright-red pseudoisidia and a bright-red pigmentation of pro- and hypothallus, while H. inopinatum lacks pseudoisidia and has a pro- and hypothallus white mottled pale yellow to orange to purplish brown. A revised key to all 34 currently accepted species in Herpothallon is provided.
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| 9. |
- Huttunen, Piritta, et al.
(författare)
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Leaf trichome production and responses to defoliation and drought in Arabidopsis lyrata (Brassicaceae)
- 2010
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Ingår i: Annales Botanici Fennici. - Helsinki : Finnish Zoological and Botanical Publishing Board. - 0003-3847 .- 1797-2442. ; 47:3, s. 199-207
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Tidskriftsartikel (refereegranskat)abstract
- Leaf trichomes can protect plants against herbivory and drought, but can be costly to produce. Theory suggests that selection for reduced costs of resistance may result in the evolution of inducible defences. We quantified variation in tolerance to drought and defoliation, and tested the hypotheses that (a) tolerance is associated with cost, (b) leaf trichome production increases tolerance to drought, and (c) trichome production is increased in response to defoliation and drought stress in Arabidopsis lyrata (Brassicaceae). Eight maternal half-sib families were exposed to two watering regimes and four defoliation treatments in a factorial design. Tolerance to drought varied among families and was inversely related to leaf size, but was not related to trichome density. Family mean performance in the low-watering treatment tended to correlate negatively with that in the control treatment. Trichome production was not induced by defoliation or drought stress. The results suggest that there is genetic variation in tolerance to drought in the study population, that tolerance to drought is associated with a cost, and that trichome production does not increase tolerance to drought in A. lyrata.
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| 10. |
- Johansson, Victor, et al.
(författare)
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Tree and site quality preferences of six epiphytic lichens growing on oaks in southeastern Sweden
- 2009
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Ingår i: Annales Botanici Fennici. - Helsinki : Finnish Zoological and Botanical Publishing Board. - 0003-3847 .- 1797-2442. ; 46:6, s. 496-506
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Tidskriftsartikel (refereegranskat)abstract
- Oaks (Quercus robur) can reach a considerable age, which makes them an important substrate for many epiphytic lichens, including several red-listed species. We studied the importance of tree size and other environmental factors for the occurrence of six epiphytic lichens at two sites, in southeastern Sweden, differing in quality as judged by tree size distribution and number of old trees. The effects of tree circumference, light availability, trunk inclination and site were analysed. Results showed that different lichen species responded differently to these factors, but, overall, tree size was most important for lichen occurrence. Five species showed a positive relation to tree size, but the 50% probability of occurrence was reached at different tree sizes among these species and there were also site differences. This study shows that the maintenance of old trees is crucial for several lichen species, which highlights the importance of long-term management plans.
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