| 1. |
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| 2. |
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| 3. |
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| 4. |
- Tyler, Torbjörn, et al.
(författare)
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Sentida förändringar i Skånes flora
- 2007
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Ingår i: Floran i Skåne. Arterna och deras utbredning.. - 9197102156 ; , s. 57-61
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 5. |
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| 6. |
- Tyler, Torbjörn, et al.
(författare)
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Skånes klimat i korthet.
- 2007
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Ingår i: Floran i Skåne. Arterna och deras utbredning.. - 9197102156 ; , s. 5-6
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 7. |
- Tyler, Torbjörn, et al.
(författare)
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Skånes mossor.
- 2003
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Ingår i: Floran i Skåne. Vegetation och utflyktsmål.. - 9197102148 ; , s. 117-124
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Bokkapitel (populärvet., debatt m.m.)
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| 8. |
- Tyler, Torbjörn, et al.
(författare)
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Statistiska uppgifter kring Skånes flora.
- 2007
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Ingår i: Floran i Skåne. Arterna och deras utbredning.. - 9197102156 ; , s. 119-123
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 9. |
- Tyler, Germund, et al.
(författare)
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Comparisons of the weevil fauna (Curculionidae, Apionidae, Bruchidae) of fifteen legume hosts (Fabaceae) in South Sweden.
- 2016
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Ingår i: Baltic Journal of Coleopterology. - 1407-8619. ; 16:2, s. 157-165
-
Tidskriftsartikel (refereegranskat)abstract
- The legume host preference of species belonging to Curculionidae, Apionidae, and Bruchidae was studied in the province of Scania, South Sweden during 2010–2015. It was suggested that significant differences existed between host preferences reported from other parts of Europe and South Sweden. In total, 375 pure stands of 15 legume species (Fabaceae), 25 stands of each species, were carefully searched, each stand for 15 min., using a scoop net. A total of 68 species belonging to Curculionidae, Apionidae, and Bruchidae with known or suspected preference for legumes were found. Species with <10 individuals in the material as a whole were excluded from statistical analysis, leaving 44 species of these groups to be considered. Correspondence Analysis (CA) performed on plant-weevil species relationships closely reflected the phylogenetic relationships of the host plants and demonstrated that most weevils were distinctly related to one single legume species, or to a few species phylogenetically closely related. Comparisons with information from Central Europe, the British Isles, and Denmark showed that the host preferences for legume genera documented in Scania were often similar to those observed elsewhere, but that considerable differences existed within the same host genus, particularly in Trifolium.
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| 10. |
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| 11. |
- Tyler, Torbjörn, et al.
(författare)
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Sensitivity of the woodland herb Anemone hepatica to changing environmental conditions
- 2002
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Ingår i: Journal of Vegetation Science. - 1654-1103. ; 13:2, s. 207-216
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Tidskriftsartikel (refereegranskat)abstract
- The decline of deciduous woodland populations of Anemone hepatica L. in southern Sweden is documented and possible causes are discussed. The study was based on (1) re-investigations of 6.25 km(2) grid-squares first studied in 19381970, (2) distribution of A. hepatica in woodland sites with well-known soil chemical properties and (3) a detailed study over 12 consecutive years into the relationships between biological characteristics of the species (number of individuals, vegetative development, flowering frequency) and environmental variables (temperature, precipitation), soil chemistry and time. There was a close relationship between soil acidity (pH, solubility of Al3+) and both distribution and biological characteristics. The biological variables declined significantly overtime but were not related to climatic variability. Increasing soil acidity and Al3+ solubility are concluded to be the main factors responsible for the decline of A. hepatica in S. Swedish deciduous woodlands.
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| 12. |
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| 13. |
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| 14. |
- Bruun, Hans Henrik, et al.
(författare)
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An allozyme study of sexual and vegetative regeneration in Hieracium pilosella L.
- 2007
-
Ingår i: Canadian Journal of Botany. - 0008-4026. ; 85:1, s. 10-15
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Tidskriftsartikel (refereegranskat)abstract
- Allozyme markers were used to fingerprint clones of the grassland plant Hieracium pilosella and, by inference, to estimate the relative importance of sexual and vegetative reproduction in a population. Field studies in populations of clonal plant species have often reported negligible or absent recruitment from seed. In contrast, studies of genetic markers have found substantial clonal diversity in populations, suggesting recruitment of new genets into established populations. Our results showed that H. pilosella regenerates from seed both within and between dense clonal patches. Two sites differing in environmental conditions were sampled in order to investigate how the balance between seed-derived and stolon-derived recruitment changes with biotic and abiotic stress. In a relatively drought-prone site on a south-facing slope, the balance was shifted towards recruitment from seed, compared to a mesic site in which vegetative regeneration was more important.
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| 15. |
- Dengler, Jürgen, et al.
(författare)
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Ecological Indicator Values for Europe (EIVE) 1.0
- 2023
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Ingår i: Vegetation Classification and Survey. - 2683-0671. ; 4, s. 7-29
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Tidskriftsartikel (refereegranskat)abstract
- Aims: To develop a consistent ecological indicator value system for Europe for five of the main plant niche dimensions: soil moisture (M), soil nitrogen (N), soil reaction (R), light (L) and temperature (T). Study area: Europe (and closely adjacent regions). Methods: We identified 31 indicator value systems for vascular plants in Europe that contained assessments on at least one of the five aforementioned niche dimensions. We rescaled the indicator values of each dimension to a continuous scale, in which 0 represents the minimum and 10 the maximum value present in Europe. Taxon names were harmonised to the Euro+Med Plantbase. For each of the five dimensions, we calculated European values for niche position and niche width by combining the values from the individual EIV systems. Using T values as an example, we externally validated our European indicator values against the median of bioclimatic conditions for global occurrence data of the taxa. Results: In total, we derived European indicator values of niche position and niche width for 14,835 taxa (14,714 for M, 13,748 for N, 14,254 for R, 14,054 for L, 14,496 for T). Relating the obtained values for temperature niche position to the bioclimatic data of species yielded a higher correlation than any of the original EIV systems (r = 0.859). The database: The newly developed Ecological Indicator Values for Europe (EIVE) 1.0, together with all source systems, is available in a flexible, harmonised open access database. Conclusions: EIVE is the most comprehensive ecological indicator value system for European vascular plants to date. The uniform interval scales for niche position and niche width provide new possibilities for ecological and macroecological analyses of vegetation patterns. The developed workflow and documentation will facilitate the future release of updated and expanded versions of EIVE, which may for example include the addition of further taxonomic groups, additional niche dimensions, external validation or regionalisation.
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| 16. |
- Ekman, Stefan, et al.
(författare)
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Skånes lavar
- 2003
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Ingår i: Floran i Skåne. Vegetation och utflyktsmål.. - 9197102148 ; , s. 125-132
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Bokkapitel (populärvet., debatt m.m.)
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| 17. |
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Floran i Skåne. Arterna och deras utbredning
- 2007
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- Detta är det andra fristående bandet av Lunds Botaniska Förenings praktverk om floran i Skåne och utgör resultatet av Projekt Skånes Flora - den inventering av landskapets kärlväxtflora som startade 1990. I Arterna och deras utbredning presenteras de mer än 3600 växter som någon gång påträffats som vildväxande i Skåne. Under Projekt Skånes Flora har 2800 olika växter blivit funna i landskapet och i Arterna och deras utbredning visar kartor i färg utbredningen för 1570 av dessa. De vidhängande texterna ger svar på alla frågor om var, hur och varför varje enskild växt finns i just Skåne. I intressanta inledningskapitel kan du även läsa om den skånska florans geologiska förutsättningar, markegenskapernas betydelse för arternas fördelning, Skånes vegetationshistoria, kommande vegetationsförändringar, Skånes floristiska växtgeografi, sentida förändringar i Skånes flora och om kultur- och trädgårdsväxter i naturen.
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| 18. |
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| 19. |
- Hallingbäck, Tomas, et al.
(författare)
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Mossfloran på Ölands alvar – ett nytt inventeringsprojekt.
- 2012
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Ingår i: Myrinia – Föreningen Mossornas Vänners tidskrift. - 1102-4194. ; 22:1, s. 6-11
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Tidskriftsartikel (refereegranskat)abstract
- In 2011 a field survey of the bryophyte vegetation and flora of Stora Alvaret, the largest continuous alvar area in Sweden situated on the Baltic island of Öland (SE Sweden), was initiated. A number of transects crossing the alvar area from west to east will be surveyed. The aim of the investigation is to try and elucidate the realtionship between the bryophyte flora and environmental parameters such as soil chemistry, soil wetness, soil depth, disturbances from livestock grazing and the geographic position on the island at different spatial and temporal scales. The survey will be conducted both in early spring and late autumn and will run for several years to enable analyses of the impact of season and climatic variations.
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| 20. |
- Hallman, Cassandra, et al.
(författare)
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Changes in south-Swedish vegetation composition over the last 200 years as described by species-specific indicator and trait values and documented by museum and literature records
- 2022
-
Ingår i: Ecological Indicators. - : Elsevier BV. - 1872-7034 .- 1470-160X. ; 134, s. 1-20
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Tidskriftsartikel (refereegranskat)abstract
- Vascular plant observances were compiled for 10 well-documented parishes in Scania, southernmost Sweden, from published floras, herbarium specimens, modern inventories, and a large citizen-science database to provide decade-level presence/absence data of species throughout the period 1800–2020. Species-specific plant traits and ecological indicator values were then used to examine functional and ecological changes based on the species composition, as well as the performance of particular vegetation types. The results were generally congruent among the 10 parishes, and indicate that several of the most important drivers of recent floristic changes, including climate changes, woody encroachment, and soil chemistry alterations have in fact acted continuously and concerted for more than a century. Floristic composition has shifted in favor of species with an affinity to higher N and P levels, as well as species which are generally more long-lived and competitive. Additionally, species less favored by grazing/mowing, and with lower demand for sunlight and moisture have increased. However, several of these trends appear to have accelerated over the past 50 years, and so has the increase of the proportion of alien invasive species in the flora. Species favored by climatic warming have also increased, at least since the 1970’s. The flora of different parts of the province has become more homogenous over time, indicating a loss of biodiversity at the regional, but not at the local scale. Instead, analyses of the biodiversity relevance, associated non-plant species and ecosystem services such as nectar production provided by the flora, suggest that local biodiversity is likely to have increased. The study demonstrates that even highly fragmented data, if compiled from a multitude of sources spanning centuries, may reveal congruent temporal changes in both biodiversity, ecosystem functions and ecological drivers and provide a historic context for monitoring recent and future changes.
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| 21. |
- Heinken, Thilo, et al.
(författare)
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The European Forest Plant Species List (EuForPlant): Concept and applications
- 2022
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Ingår i: Journal of Vegetation Science. - : Wiley. - 1654-1103 .- 1100-9233. ; 33:3, s. 1-16
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Tidskriftsartikel (refereegranskat)abstract
- Question: When evaluating forests in terms of their biodiversity, distinctiveness and naturalness, the affinity of the constituent species to forests is a crucial parameter. Here we ask to what extent are vascular plant species associated with forests, and does species’ affinity to forests vary between European regions?Location: Temperate and boreal forest biome of Northwestern and Central Europe. Methods: We compiled EuForPlant, a new extensive list of forest vascular plant spe- cies in 24 regions spread across 13 European countries using vegetation databases and expert knowledge. Species were region-specifically classified into four categories reflecting the degree of their affinity to forest habitats: 1.1, species of forest interiors; 1.2, species of forest edges and forest openings; 2.1, species that can be found in forest as well as open vegetation; and 2.2, species that can be found partly in forest, but mainly in open vegetation. An additional “O” category was distinguished, covering species typical for non-forest vegetation.Results: EuForPlant comprises 1,726 species, including 1,437 herb-layer species, 159 shrubs, 107 trees, 19 lianas and 4 epiphytic parasites. Across regions, generalist forest species (with 450 and 777 species classified as 2.1 and 2.2, respectively) significantly outnumbered specialist forest species (with 250 and 137 species classified as 1.1 and 1.2, respectively). Even though the degree of shifting between the categories of for- est affinity among regions was relatively low (on average, 17.5%), about one-third of the forest species (especially 1.2 and 2.2) swapped categories in at least one of the study regions.Conclusions: The proposed list can be used widely in vegetation science and global change ecology related to forest biodiversity and community dynamics. Shifting of forest affinity among regions emphasizes the importance of a continental-scale forest plant species list with regional specificity.
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| 22. |
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| 23. |
- Ingimundardóttir, Gróa Valgerður, et al.
(författare)
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Dressed for the occasion! Ecotypic divergence, phenotypic plasticity and taxonomic value of capitulum characters of Scorzoneroides autumnalis (Asteraceae)
-
Ingår i: Nordic Journal of Botany. - 0107-055X.
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Tidskriftsartikel (refereegranskat)abstract
- Scorzoneroides autumnalis is a highly polymorphic perennial with several described infraspecific taxa, largely differing in involucre colour and indumentum intensity. Here, we examine the role of ecotypic divergence and phenotypic plasticity in shaping large-scale geographical variation in these characters. We collected phenotypic data from herbarium specimens and garden-grown plants of S. autumnalis, representing several habitats throughout Scandinavia and Iceland, and subjected progenies from controlled crosses within a subset of the common garden material to different temperature regimes to assess patterns of phenotypic plasticity. Our results strongly suggest that colour and indumentum of involucral bracts, as well as the size of capitula (measured by ligule length), are environmentally plastic and much affected by temperature. Reduced temperature resulted in significantly larger capitula, with both thicker and darker involucre indumentum. Since dark colouration, dense indumentum and large floral structures have been shown to facilitate heat retention and insect visitation in other plant species growing in cold climate, we hypothesize that plants of S. autumnalis benefit from possessing these features under cool conditions, and that much of the geographical variation in capitulum characters reflects adaptive phenotypic plasticity rather than ecotypic divergence. For this reason, we deem these characters to have a low taxonomic value for distinguishing infraspecific taxa within S. autumnalis.
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| 24. |
- Jönsson, Jane, et al.
(författare)
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Ten polymorphic microsatellite markers for Hieracium s.s. (Asteraceae)
- 2010
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Ingår i: Conservation Genetics Resources. - : Springer Science and Business Media LLC. - 1877-7260 .- 1877-7252. ; 2:1, s. 295-300
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Tidskriftsartikel (refereegranskat)abstract
- Eight novel microsatellite markers were developed for Hieracium s.s. (excluding Pilosella) using a modified FIASCO protocol, and two out of nine microsatellites that were originally developed for Pilosella officinarum were optimised for Hieracium s.s.. All ten microsatellites consistently amplified loci from a wide range of representatives from north and central European species of various sections of the genus. When tested on 19 individuals, nine microsatellites were found to be highly polymorphic with 6–29 alleles, while one microsatellite marker was monomorphic. Cross-amplification showed that six of the ten microsatellites also amplified products in one taxon of Pilosella, P. floribunda × officinarum.
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| 25. |
- Karlsson, T, et al.
(författare)
-
Changes in the Hieracium flora in the Nässjö area (Småland, S Sweden) during the 20th century(Skogs- och hagfibblor i nässjötrakten i åttio års perspektiv)
- 2005
-
Ingår i: Svensk Botanisk Tidskrift. - 0039-646X. ; 99:3-4, s. 187-207
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The Hieracium flora in an area of 1250 km(2) centred around the town of Nassjo, S Sweden, was investigated in 1924-30 and again in 2004. In all, 101 species of the sections Hieracium and Vulgaria were found, 89 in the 1920s and 85 in 2004, i.e. approximately the same number. However, the number of species per 5 by 5-km area has been strongly reduced, and the decline is even more pronounced for 1 by 1-km areas. This implies that Hieracium species have generally become much rarer If the sample from the 1920s is unbiased, species of sect. Hieracium have declined more than those of sect. Vulgaria. In the 1920s, the main Hieracium habitat was wooded meadows cut for hay after mid-summer; hawkweeds were a conspicuous and species-rich element of their vegetation. Today, almost all the former hay-meadows have changed into forest or manured grassland, and the hawkweeds are usually gone. Species of sect. Vulgaria are now mainly fond on roadsides (70% of all localities) whereas those of sect. Hieracium prefer woodland (63% of all localities). However, species of the Bifida group within sect. Hieracium have the same habitat preferences as sect. Vulgaria. - Two species are new to the province of Smaland, viz. H. constringens Norrl. and H. expallidiforme (Dahlst. ex Stenstr) Dahlst. Names in Swedish are provided.
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| 26. |
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| 27. |
- Karlsson, Thomas, et al.
(författare)
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Den botaniska skattkammaren – en digital svensk flora blir till
- 2018
-
Ingår i: Svensk Botanisk Tidskrift. - 0039-646X. ; 112:2, s. 133-135
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The newly developed website ’Den botaniska skattkammaren’ [The botanic treasury; www.botskatt.se] is presented. It is intended to be gradually filled with miscellaneous information about vascular plant taxa found in, or expected to be found in Swedish nature (i.e. including all kinds of ephemerals and garden escapes). The material included will partly be newly produced, partly reproduced with permission from difficult-to-access sources such as local periodicals. The format of the materials included will differ and only minimal efforts will be put on the layout, but in order to faciliate reporting to national biodiversity databases the nomenclature will strictly follow the national taxonomic rectifiers Dyntaxa (for species known from Swedish nature) and Svensk Kulturväxtdatabas (for cultivated taxa). To begin with, the focus will be on determination keys to genera and species not well covered in modern Swedish floras, but morphological descriptions as well as all kinds of biologocal, ecological and biogeographic information may be added if and when the project is carried on.
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| 28. |
- Karlsson, Thomas, et al.
(författare)
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Swedish names for Swedish hawkweeds
- 2006
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Ingår i: Svensk Botanisk Tidskrift. - 0039-646X. ; 100, s. 34-51
-
Tidskriftsartikel (refereegranskat)
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| 29. |
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| 30. |
- Moberg, Christina, et al.
(författare)
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De unga gör helt rätt när de stämmer staten
- 2022
-
Ingår i: Aftonbladet. - 1103-9000.
-
Tidskriftsartikel (populärvet., debatt m.m.)abstract
- 1 620 forskare och lärare i forskarvärlden: Vi ställer oss bakom Auroras klimatkrav
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| 31. |
- Nilsson, Staffan, et al.
(författare)
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Rödlistade mossor och värdefulla lokaler i Skåne
- 2019
-
Ingår i: Botaniska Notiser: utgivna av Lunds botaniska förening (2001-). - 1650-3767. ; 152:2, s. 35-61
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Nationally Red-listed bryophytes in the county of Skåne, southern-most Sweden] The status and present as well as past distribution of the 85 bryophyte taxa that have been reported from the county are described and briefly summarised and localities with revcent recerds of several Red-listed species are listed, mapped and described. The number of Red-listed species per 5x5 km grid-square, and all known records of Porella arboris-vitae, Rhynchostegium confertum, Syntrichia laevipila, Oxyrrhynchium schleicheri, Scapania gracilis, Cinclidotus fontinaloides, Dichelyma capillaceum, Enthosthodon fascicularis, Hookeria lucens, Neckera pumila, Odontoschisma denudatum, Orthotrichum pallens, Oxyrrhynchium speciosum, Protobryum bryoides, Leucobryum juniperoideum, Pterygoneuron ovatum and Weissia longifolia are shown on maps.
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| 32. |
- Nilsson, Tommy, et al.
(författare)
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Eight new species of Hieracium sect. Tridentata (Asteraceae) from southern and northern Sweden
- 2018
-
Ingår i: Nordic Journal of Botany. - : Wiley. - 0107-055X. ; 36:9
-
Tidskriftsartikel (refereegranskat)abstract
- Eight new species of Hieracium sect. Tridentata, namely H. antrorsum, H. quercifolium,H. stenianum, H. vestrogothicum, and H. vetlandaënse are described from the Götaland region (southern Sweden), H. grothii from Norrbotten in the Norrland region(northeast Sweden), and H. sparsifolium var. suppansum Johanss. and H. adampliatumvar. pilosius Ohlsén are raised to specific rank as H. suppansum and H. gothiciferumrespectively.
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| 33. |
- Nilsson, Tommy, et al.
(författare)
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Seven new species of Hieracium sect. Tridentata (Asteraceae) from Götaland, southern Sweden
- 2016
-
Ingår i: Nordic Journal of Botany. - : Wiley. - 0107-055X. ; 34:3, s. 269-284
-
Tidskriftsartikel (refereegranskat)abstract
- Six new species of Hieracium sect. Tridentata, viz. H. piranhae, H. xanthochlorum, H. bertilssonii, H. erectiramum, H. rigescoides and H. subpardalinum are described from the Götaland region, southern Sweden and H. gothicum var. blekingense is raised to specific rank as H. blekingense.
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| 34. |
- Nilsson, Tommy, et al.
(författare)
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Twelve new species of Hieracium sect. Tridentata (Asteraceae) from southern Sweden
- 2023
-
Ingår i: Nordic Journal of Botany. - 0107-055X. ; 2023:8
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Tidskriftsartikel (refereegranskat)abstract
- Twelve new, presumably apomictic species of Hieracium sect. Tridentata, namely H. arcanum, H. versifrons, H. hyperoptum, H. irrugantifrons, H. karolinae, H. leucophlebium, H. melanostigma, H. neomixopolium, H. oxyodontum, H. rostockense, H. subcreperum and H. verecundum are described from the Götaland region of southern Sweden. Apart from morphological descriptions, illustrations and maps showing the distribution of all the species are provided.
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| 35. |
- Olander, Sanna, et al.
(författare)
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Morphometrics and taxonomy of Erigeron acris sensu lato
- 2017
-
Ingår i: New Journal of Botany. - : Informa UK Limited. - 2042-3489 .- 2042-3497. ; 7:1, s. 39-50
-
Tidskriftsartikel (refereegranskat)abstract
- Morphometric multivariate analysis has been performed based on 23 characters observed on 113 herbariumspecimens from throughout Fennoscandia. This demonstrates that four taxa can be recognised withinErigeron acris L. sensu lato, viz. E. acris L. subsp. acris, E. acris subsp. decoloratus (H. Lindb.) Hiitonen,E. acris subsp. droebachiensis (O. F. Müll.) Arcang. and E. acris subsp. politus (Fr.) H. Lindb. In contrast,the previously accepted E. (acris subsp.) brachycephalus H. Lindb. is shown to be indistinguishable fromE. acris subsp. droebachiensis and is accordingly treated as a synonym. The subspecies aredistinguishable mainly based on indumentum characteristics, and size and pigmentaton of phyllaries andfloral parts, but 21 of the 23 characters were significantly different among taxa. The largest number (ten)of significantly different characters was found between subspecies acris, droebachiensis and politus,whereas only five characters differed significantly between decoloratus and acris. The contrastingcharacter ranges and distinctness of these taxa is presented and discussed, and a key to the subspeciesis provided. In addition, their distributions in Sweden are mapped based on herbarium specimens,showing that subsp. acris is common almost throughout the country, subsp. droebachiensis is relativelyrare and restricted to the central parts, and subsp. politus is confined to the northern half.
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| 36. |
- Olofsson, Jill K., et al.
(författare)
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Morphological and genetic evidence suggest gene flow among native and naturalized mint species
- 2024
-
Ingår i: American Journal of Botany. - : John Wiley & Sons. - 0002-9122 .- 1537-2197. ; 111:2
-
Tidskriftsartikel (refereegranskat)abstract
- Premise: Cultivation and naturalization of plants beyond their natural range can bring previously geographically isolated taxa together, increasing the opportunity for hybridization, the outcomes of which are not predictable. Here, we explored the phenotypic and genomic effects of interspecific gene flow following the widespread cultivation of Mentha spicata (spearmint), M. longifolia, and M. suaveolens. Methods: We morphologically evaluated 155 herbarium specimens of three Mentha species and sequenced the genomes of a subset of 93 specimens. We analyzed the whole genomes in a population and the phylogenetic framework and associated genomic classifications in conjunction with the morphological assessments. Results: The allopolyploid M. spicata, which likely evolved in cultivation, had altered trichome characters, that is possibly a product of human selection for a more palatable plant or a byproduct of selection for essential oils. There were signs of genetic admixture between mints, including allopolyploids, indicating that the reproductive barriers between Mentha species with differences in ploidy are likely incomplete. Still, despite gene flow between species, we found that genetic variants associated with the cultivated trichome morphology continue to segregate. Conclusions: Although hybridization, allopolyploidization, and human selection during cultivation can increase species richness (e.g., by forming hybrid taxa), we showed that unless reproductive barriers are strong, these processes can also result in mixing of genes between species and the potential loss of natural biodiversity.
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| 37. |
- Ramirez, Juan Ignacio, et al.
(författare)
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Reindeer grazing reduces climate-driven vegetation changes and shifts trophic interactions in the Fennoscandian tundra
- 2024
-
Ingår i: Oikos. - : John Wiley & Sons. - 0030-1299 .- 1600-0706.
-
Tidskriftsartikel (refereegranskat)abstract
- Herbivores drive shifts in plant species composition by interacting with vegetation through defoliation, trampling and nutrient addition: urine and faeces. As herbivore effects on vegetation accumulate over time, they might spillover to other trophic levels, but how and when this happens is poorly understood. Since it is methodologically demanding to measure biodiversity across spatial gradients, an alternative approach is to assess it through biodiversity indices of vascular plants. We employed the Index of biodiversity relevance developed for Swedish flora which provides an estimated number of organisms associated with a plant species, allowing the quantification of trophic community size. Values from this index were coupled with vegetation data from a network of 96 fenced and paired grazed plots across Fennoscandia. We analysed the role herbivory has on plant richness and diversity, and on the number of organisms that interact with the vegetation according to the index values. We also explored how herbivores influence the competitive effects of tall shrubs on other plants since the dominance of a vegetation type links directly to biodiversity. Plant diversity had no clear response to grazing. Overall vegetation and the vegetation subgroups herbs and non-fruit shrubs had higher biodiversity index values in fenced plots, indicating a higher number of plant–host interactions. Herb cover was negatively related to shrubs in both treatments but with a faster decline in the absence of herbivores. This study highlights the importance of maintaining herbivore populations in the Arctic to conserve the vegetation structure and biodiversity of the tundra. This method of coupling biodiversity indexes with vegetation data provides complementary information to the plant diversity, especially when methodological or time constraints prevent complete field inventories.
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| 38. |
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| 39. |
- Schiemann, Katarina, et al.
(författare)
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Allozyme diversity in relation to geographic distribution and population size in Lathyrus vernus (L.) Bernh. (Fabaceae)
- 2000
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Ingår i: Plant Systematics and Evolution. - 1615-6110. ; 225:1-4, s. 119-132
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Tidskriftsartikel (refereegranskat)abstract
- Lathyrus vernus (L.) Bernh. is a diploid, long-lived perennial and insect-pollinated herb with no special adaptation to long-distance dispersal. It occurs on neutral soil in deciduous forests throughout western Eurasia. Due to specific habitat preferences, L. vernus has a fragmented distribution with isolated populations. We investigated allozyme variation at eleven loci in 20 populations of L. vernus from one geographically central region (the Czech Republic and the Slovak Republic) and two geographically marginal regions (southern and central Sweden) in the species present-day distribution. There was a clear differentiation between the three regions and the genetic distance between the populations was highly correlated with geographic distance. The total genetic diversity (H-T) was 0.354. The proportion of genetic diversity due to differentiation between regions, and to differentiation between populations within regions, accounted for 10% each. There was no difference in level of genetic diversity between the three regions. No significant difference in level of genetic diversity was found between small and large populations. The genetic diversity in L. vernus may either be a result of the long generation-time of the species or peculiarities in the post-glacial migration species, e.g, survival only in refugia far east of the sampled populations and/or migration as a continuous process not involving founder-events.
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| 40. |
- Snogerup, Sven, et al.
(författare)
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Skånska vegetationstyper
- 2003
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Ingår i: Floran i Skåne. Vegetation och utflyktsmål. - 9197102148 ; , s. 53-76
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Bokkapitel (populärvet., debatt m.m.)
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| 41. |
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| 42. |
- Sundberg, Sebastian, et al.
(författare)
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Risbräsma - nu i Norden
- 2017
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Ingår i: Daphne. - 1101-5527. ; 28, s. 13-15
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 43. |
- Tyler, Torbjörn
(författare)
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A revision of Hieracium (Asteraceae) in Norrbotten, northeastern-most Sweden, revealed seven new species
- 2010
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Ingår i: Nordic Journal of Botany. - : Wiley. - 0107-055X. ; 28:5, s. 541-560
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Tidskriftsartikel (refereegranskat)abstract
- The large quantity of material of Hieracium sectt. Hieracium, Vulgata, Bifida and Oreadea collected during the recently completed floristic inventory of the northeastern most Swedish province of Norrbotten has been revised. The number of species known from this previously badly under-collected province hereby increased from 27 to 64, and seven species new to science were revealed. A diagnostic key to all 64 species is provided and H. alces T. Tyler, H. hystrix T. Tyler, H. larsii-levii T. Tyler, H. pseudopsepharum T. Tyler, H. stenbergii T. Tyler, H. taedum T. Tyler and H. vexillatum T. Tyler are described anew.
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| 44. |
- Tyler, Torbjörn
(författare)
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Allozyme variation in Carex sect. Digitatae - Evidence of introgression, genetic distinctiveness and evolution of taxa
- 2003
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Ingår i: Plant Systematics and Evolution. - : Springer Science and Business Media LLC. - 1615-6110 .- 0378-2697. ; 237:3-4, s. 219-231
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Tidskriftsartikel (refereegranskat)abstract
- A subset of populations of the European taxa of Carex sect. Digitatae, including Carex digitata, C. pallens, C. ornithopoda, C. pediformis ssp. rhizodes and C. humilis have been investigated for allozyme variation. The (presumably) distantly related C. pendula was used a's a reference taxon. Carex digitata, C. pallens and C. ornithopoda on the one hand, and C. humilis and C. pediformis on the other, shared the majority of the alleles. Cluster analyses based on genetic distances grouped populations of C. digitata and C. ornithopoda in a mixed subcluster whereas all populations of C. pallens formed a subcluster distinct from the digitata/ornithopoda cluster. This in spite of the fact that C. ornithopoda is morphologically clearly distinct from C. digitata whereas C. pallens is barely distinguishable from the latter. Carex pediformis and C. humilis appeared not more genetically similar to C. digitata than to the reference taxon. It is concluded that 1) C. digitata, C. pallens and C. ornithopoda are closely related and most probably forms a monophyletic group, 2) C. pallens is a genetically distinct species, 3) C. pediformis and C. humilis are not closely related to the rest of C. sect. Digitatae, 4) C. pediformis and C. humilis are relatively closely related, 5) introgression do occur between the investigated species but not to such an extent that it can explain major geographic patterns of variation in C. digitata.
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| 45. |
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| 46. |
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| 47. |
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| 48. |
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| 49. |
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| 50. |
- Tyler, Torbjörn
(författare)
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Arter av växter: Är de och vad är de?
- 2001
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Ingår i: Nordic Journal of Botany. - 0107-055X. ; 134:1, s. 31-44
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The current confusion about what species are has two major causes. First, many authors discussing species concepts seem not to have considered for what purpose species are distinguished. Several proposed species concepts define species in a way that is only useful in a narrow field of advanced biological science. It is argued that species concepts should rather fulfil the needs of the majority of biologists who need species in order to communicate. Second, many species concepts (e.g. the biological and ecological species concepts) define species as die end products of certain specified speciation-processes, thereby confusing process and pattern and in a sense putting the cart before the horse. To facilitate unprejudiced studies of evolutionary processes it is argued that the species concept should be free from any assumptions about processes of speciation. Phylogenetic species concepts, stressing the importance of monophyly and defining species based on phylogenetic reconstructions only, are criticized for being of little use outside the field of phylogenetics. A species concept similar to Mallet's 'genotype-cluster definition', in which species are defined as groups of individuals within a discrete multi-character cluster of variation, is advocated. Whenever possible, characters should be chosen both from morphology and molecular markers, and, at least in critical taxa, the use of multivariate statistics to evaluate species distinctness is recommended. It is further argued that only those 'genotype clusters' that anyone has a practical need to distinguish should be formally recognised as taxa. In groups where many discrete genetical entities can be found, only those that are both morphologically readily distinguishable and have a unique ecology or distribution need to be recognised.
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