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  • 11
    Online Resource
    Online Resource
    Wiley ; 2023
    In:  Applied Vegetation Science Vol. 26, No. 2 ( 2023-04)
    In: Applied Vegetation Science, Wiley, Vol. 26, No. 2 ( 2023-04)
    Abstract: Changed land use, nitrogen deposition, climate change, and the spread of non‐native species have repeatedly been reported as the main drivers of recent floristic changes in northern Europe. However, the relevance of the geographical scale at which floristic changes are observed is less well understood and it has only rarely been possible to quantify biodiversity loss. Therefore, we assessed changes in species richness, species composition and mean ecological indicator values (EIVs) at three nested geographic scales during two different time periods, each ca 30 years, since the mid‐1900s. Location Two parishes in central Scania, southernmost Sweden. Methods We analyzed species presence/absence data from three inventories at ca 30‐year intervals over 1957–2021 and three geographic scales (157 m 2 , ca 7 km 2 and ca 45 km 2 ) to document temporal trends and differences between geographic scales in terms of species richness, species composition and mean EIVs. Results We found shifts in species composition across all geographical scales. However, the magnitude of biodiversity loss and the main drivers of these changes were scale‐dependent. At the smallest spatial scale, we saw a dramatic loss of plant biodiversity with local species richness in 2021 being only 48% of that of 1960. In contrast, at the larger geographic scales no significant changes in species richness were observed because species losses were compensated for by gains of predominantly non‐native species, which made up at least 78% of the new species richness. At the smallest spatial scale, changed land use (ceased grazing/mowing and intensified forestry) appeared as the main driver, while an increasing proportion of non‐native species, as well as climatic changes and increasing nitrogen loads appeared relatively more important at larger geographic scales. Conclusion Our results highlight the precarious situation for biodiversity in the region and at the same time the fundamental importance of geographic scale in studies of biodiversity change. Both the magnitude and drivers of changes may differ depending on the geographic scale and must be considered also when previously published studies are interpreted.
    Type of Medium: Online Resource
    ISSN: 1402-2001 , 1654-109X
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2053083-3
    SSG: 12
    SSG: 23
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  • 12
    Online Resource
    Online Resource
    Canadian Science Publishing ; 2007
    In:  Canadian Journal of Botany Vol. 85, No. 1 ( 2007-01), p. 10-15
    In: Canadian Journal of Botany, Canadian Science Publishing, Vol. 85, No. 1 ( 2007-01), p. 10-15
    Abstract: Allozyme markers were used to fingerprint clones of the grassland plant Hieracium pilosella L. 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 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 with a mesic site in which vegetative regeneration was more important.
    Type of Medium: Online Resource
    ISSN: 0008-4026
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2007
    detail.hit.zdb_id: 218116-2
    detail.hit.zdb_id: 1481926-0
    SSG: 12
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  • 13
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2013
    In:  Annals of Botany Vol. 111, No. 4 ( 2013-4), p. 591-609
    In: Annals of Botany, Oxford University Press (OUP), Vol. 111, No. 4 ( 2013-4), p. 591-609
    Type of Medium: Online Resource
    ISSN: 1095-8290 , 0305-7364
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2013
    detail.hit.zdb_id: 1461328-1
    SSG: 12
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  • 14
    In: Physics Reports, Elsevier BV, Vol. 968 ( 2022-07), p. 1-50
    Type of Medium: Online Resource
    ISSN: 0370-1573
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 120601-1
    detail.hit.zdb_id: 1466624-8
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  • 15
    Online Resource
    Online Resource
    Wiley ; 2022
    In:  Laryngoscope Investigative Otolaryngology Vol. 7, No. 5 ( 2022-10), p. 1280-1291
    In: Laryngoscope Investigative Otolaryngology, Wiley, Vol. 7, No. 5 ( 2022-10), p. 1280-1291
    Abstract: To investigate the clinical features, management strategies and outcomes for patients with metastatic primary skull base chordomas. Study Design Systematic review. Methods A systematic search through Pubmed/Medline, Web of Science, and EBSCOhost (CINAHL) was conducted without restriction on dates. After study screening and full‐text assessment, two authors independently extracted all data using a pre‐established abstraction form. Results Forty cases were included from 38 studies. The average age (standard deviation [SD]) of the sample at presentation was 28.5 (23.3) and was equally distributed across genders. The average time (SD) between initial diagnosis to local recurrence was 40.1 (60.3) months. The average time (SD) from primary tumor detection to the diagnosis of metastatic disease was 55.2 (49.0) months. The most common subsite for metastatic spread were the lungs (32.5%). Of the 33 patients with data on outcomes, 48.5% were found to have expired by the time of publication. The median overall survival was estimated to be 84 months (95% confidence interval [CI] 62.3–105.7). Conclusions The most common subsites for metastatic spread of skull base chordoma were the lungs and bone. Overall survival for patients in the current cohort was a median of 84 months, with no significant differences noted when stratifying by the extent of surgery or the site of metastases. Level of Evidence 3a
    Type of Medium: Online Resource
    ISSN: 2378-8038 , 2378-8038
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2851702-7
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  • 16
    Online Resource
    Online Resource
    Wiley ; 2002
    In:  Journal of Biogeography Vol. 29, No. 7 ( 2002-07), p. 919-930
    In: Journal of Biogeography, Wiley, Vol. 29, No. 7 ( 2002-07), p. 919-930
    Abstract: To investigate the distribution, and broad‐scale geographical patterns, of variation, in the widespread boreo‐nemoral woodland herb Carex digitata throughout its native European range. To interpret the revealed geographical pattern of variation in terms of glacial survival, post‐glacial migration and inter‐regional gene‐flow. Location The whole of Europe divided into twenty‐five geographical regions. Methods Genetic variation at nine polymorphic allozyme loci was analysed in 10–25 individuals from 66 populations from throughout the European range of C. digitata . Allele frequencies were calculated both at the level of populations and at the level of geographical regions, and these frequencies were used to calculate the Cavalli‐Sforza chord distance (CSCD). CSCD between neighbouring regions were presented on geographical maps. CSCD at both the population and the regional level were subjected to UPGMA cluster analysis. Standard measures of genetic diversity were calculated and divided into within population, region and species components. Results Most alleles had a scattered distribution throughout, but several alleles were mainly found in Fennoscandia and regional allelic richness was the highest here. Cluster analysis on the level of populations did not recover any geographical structure. However, genetic distances between regions, each consisting of 1–4 populations, revealed a clear geographical pattern. Genetic distances were low between (1) Scandinavian and British regions and (2) between Mediterranean regions, moderate between Central European regions and high between far‐east European and Caucasian regions. Main conclusions A post‐glacial scenario involving independent glacial survivals in south‐eastern European Russia, the Caucasian Mountains, the Mediterranean area and central Europe is proposed. Northern Europe (i.e. Fennoscandia) appears to have been colonized through many independent long‐distance dispersals from different extra‐Fennoscandian populations. High regional population densities in Fennoscandia are assumed to have facilitated accumulation of genetic variation and inter‐regional gene‐flow as compared with more southern populations which are generally of restricted size and appear to have been mutually isolated and subjected to strong genetic drift.
    Type of Medium: Online Resource
    ISSN: 0305-0270 , 1365-2699
    Language: English
    Publisher: Wiley
    Publication Date: 2002
    detail.hit.zdb_id: 2020428-0
    detail.hit.zdb_id: 188963-1
    SSG: 12
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  • 17
    Online Resource
    Online Resource
    Wiley ; 2007
    In:  Nordic Journal of Botany Vol. 25, No. 3-4 ( 2007-08), p. 152-160
    In: Nordic Journal of Botany, Wiley, Vol. 25, No. 3-4 ( 2007-08), p. 152-160
    Abstract: Hieracium incurrens Saelan ex Norrl., originally described from Finland, has been reported from Sweden several times and independently by different authors. Still, however, its presence in Sweden has remained dubious and it has become obvious that the different reports are referable to different taxa and the name has thus been, at least partially, misapplied. In the present study, all Swedish material and putative taxa that have been suggested to belong to H. incurrens , as well as some additional closely similar taxa, is critically compared with authentic material of the latter from Finland. It is concluded that H. incurrens do indeed occur in central Sweden, namely in the eastern coastal provinces closest to Finland. However, the relevant material has mostly been referred to H. longilingua Johanss., which is here considered to be a later synonym of H. incurrens. Material previously referred to H. incurrens from other parts of Sweden does, however, represent other taxa. Five accepted species of this affinity are described and discussed in some detail and one species, viz. H. oestmanii T. Tyler is described anew. In addition, the unrelated species H. arnoldii T. Tyler is described anew based on material from the provinces of Hälsingland and Medelpad.
    Type of Medium: Online Resource
    ISSN: 0107-055X , 1756-1051
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2007
    detail.hit.zdb_id: 2406507-9
    SSG: 12
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  • 18
    In: Nordic Journal of Botany, Wiley, Vol. 27, No. 1 ( 2009-02), p. 37-53
    Type of Medium: Online Resource
    ISSN: 0107-055X , 1756-1051
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2009
    detail.hit.zdb_id: 2406507-9
    SSG: 12
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  • 19
    Online Resource
    Online Resource
    Wiley ; 2016
    In:  Nordic Journal of Botany Vol. 34, No. 6 ( 2016-12), p. 641-644
    In: Nordic Journal of Botany, Wiley, Vol. 34, No. 6 ( 2016-12), p. 641-644
    Type of Medium: Online Resource
    ISSN: 0107-055X , 1756-1051
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2406507-9
    SSG: 12
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  • 20
    Online Resource
    Online Resource
    Wiley ; 2011
    In:  Nordic Journal of Botany Vol. 29, No. 5 ( 2011-10), p. 538-589
    In: Nordic Journal of Botany, Wiley, Vol. 29, No. 5 ( 2011-10), p. 538-589
    Type of Medium: Online Resource
    ISSN: 0107-055X
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 2406507-9
    SSG: 12
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