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Seasonal pattern of germination and seed longevity in the invasive species Heracleum mantegazzianum / Lenka Moracova in Preslia, 78 (2006)
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Titre : Seasonal pattern of germination and seed longevity in the invasive species Heracleum mantegazzianum Type de document : Électronique Auteurs : Lenka Moracova ; Petr Pyšek ; Jan Pergl (1977-) ; Irena Perglova ; Vojtěch Jarošík (1958-2013) Année de publication : 2006 Article en page(s) : 287-301 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Plantes subspontanées, naturalisées, envahissantes
[CBNPMP-Géographique] République TchèqueMots-clés : Heracleum mantegazzianum Sommier & Levier Résumé : We investigated the effects of different temperature regimes and dry storage on germination of H. mantegazzianum (Apiaceae, native to Caucasus) seeds in the laboratory and linked the results with studies of seasonal seed bank depletion in a common garden experiment and under field conditions. Seeds were collected at seven sites in the Slavkovský les region, Czech Republic, cold-stratified for 2 months and germinated at seven temperature regimes. Under all temperature regimes, fresh seeds germinated to significantly higher percentages than older (1, 2, 3 years) seeds. For all storage lengths, seeds germinated best at alternating day/night temperatures of 20/5 °C. The length of the germination period had a significant effect only at low constant temperatures of 2 and 6 °C, where germination percentage increased between 2 and 6 months. Seasonal germination exhibited a distinct pattern, with rapid depletion of seed bank by the first spring after seed burial. Non-dormant seeds were present in the soil early in spring and late in autumn. The higher summer temperatures prevented dormancy breaking and another cold period of at least two months below 10 °C was needed to bring non-germinated seeds out of dormancy. The results suggest that (1) seed dormancy of H. mantegazzianum was not completely broken until the first spring, but that some seeds re-enter or retain dormancy during high summer temperatures and that (2) the threshold needed for breaking the dormancy was achieved gradually during the cold autumn and winter months. However, in a small fraction of seeds the dormancy breaking process took several years. Of seeds buried in 10 different regions of the Czech Republic, on average 8.8% survived 1 year, 2.7% 2 years and 1.2% remained viable and dormant after 3 years of burial. The ability of even small fraction of H. mantegazzianum seeds to survive for at least 3 years can result in re-invasion of this species into controlled sites. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142012
in Preslia > 78 (2006) . - 287-301Moracova, L., Pyšek, P., Pergl, J., Perglova, I., Jarošík, V. 2006. Seasonal pattern of germination and seed longevity in the invasive species Heracleum mantegazzianum. Preslia, 78: 287-301.Documents numériques
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Article (2006)Adobe Acrobat PDF The habitat factors that affect the composition of bryophyte and lichen communities on fallen logs / Irena Jansova in Preslia, 78 (2006)
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Titre : The habitat factors that affect the composition of bryophyte and lichen communities on fallen logs Type de document : Électronique Auteurs : Irena Jansova ; Zdeněk Soldán (1957-) Année de publication : 2006 Article en page(s) : 67-86 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Bryophytes
[CBNPMP-Géographique] République TchèqueRésumé : The composition of cryptogam (bryophyte and lichen) communities on fallen logs was studied in two old-growth forests in the Czech Republic. Altogether, 85 species (22 liverworts, 44 mosses, and 19 lichens) were recorded. The presence and abundance of the different species on 350 logs was attributed to habitat factors (e.g. humidity, wood decay, wood softness, log diameter, bark cover, thickness of humus layer and tree species) that were recorded separately for each of the logs. The aim was to identify the factors significantly affecting the composition of cryptogam communities. For the different ecological groups of species (epiphytes, epixylic species, and ground flora) forwarded canonical correspondence analysis (CCA) selected thickness of humus layer and tree species as the factors explaining most variability. In addition, the extent of log surface covered by bark, humidity and log decay were selected as significant determinants of cryptogam community composition. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=141982
in Preslia > 78 (2006) . - 67-86Jansova, I., Soldán, Z. 2006. The habitat factors that affect the composition of bryophyte and lichen communities on fallen logs. Preslia, 78: 67-86.Documents numériques
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Article (2006)Adobe Acrobat PDF Weed vegetation in southern Moravia (Czech Republic) : a formalized phytosociological classification / Zdenka Lososova in Preslia, 76 (2004)
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Titre : Weed vegetation in southern Moravia (Czech Republic) : a formalized phytosociological classification Type de document : Électronique Auteurs : Zdenka Lososova Année de publication : 2004 Article en page(s) : 65–85 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Groupements végétaux, phytosociologie
[CBNPMP-Géographique] République TchèqueRésumé : A phytosociological synthesis of weed vegetation of southern Moravia (Czech Republic) was performed using the Braun-Blanquet approach. Gradsect sampling, i.e. a priori stratified selection of sampling sites, was used for the field survey. Using this method, 115 quadrants of the Central European mapping grid (6 × 5.6 km) were chosen. Three hundred and ten relevés recorded in 1997–2002 were classified, based on the Cocktail method, which defines sociological species groups and then creates formal definitions of vegetation units. In total, nine associations of the class Stellarietea mediae were distinguished in southern Moravia. Three associations were included in the alliance Caucalidion lappulae (Lathyro-Adonidetum, Euphorbio-Melandrietum, Veronicetum hederifolio-triphylli) and three in the alliance Scleranthion annui (Aphano-Matricarietum, Spergulo-Scleranthetum, Erophilo-rabidopsietum). For each of the alliances Veronico-Euphorbion, Spergulo-Oxalidion and Panico-Setarion one association was distinguished, respectively, Setario-
Fumarietum, Panico-Chenopodietum polyspermi and Echinochloo-Setarietum pumilae . Species composition of these associations is documented in a synoptic table. Their structure, ecology, and distribution are commented.Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=141927
in Preslia > 76 (2004) . - 65–85Lososova, Z. 2004. Weed vegetation in southern Moravia (Czech Republic) : a formalized phytosociological classification. Preslia, 76: 65–85.Documents numériques
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article (2004)URL Working with site specific seeds and vegetation in Czech Republic and Slovakia, experiences and prospects / Magdalena Ševčíková (2006)
est un extrait de Soil-bioengineering : Ecological Restoration with native plants an seed material / Bernhard Krautzer (2006)
Titre : Working with site specific seeds and vegetation in Czech Republic and Slovakia, experiences and prospects Type de document : Extrait d'ouvrage Auteurs : Magdalena Ševčíková ; Pavel Sramek ; Ivana Jongepierová-Hlobilová (1962-) ; Maria Zimková Année de publication : 2006 Importance : p. 201-206 Langues : Français (fre) Catégories : [CBNPMP-Thèmes] Revégétalisation
[CBNPMP-Géographique] République Tchèque
[CBNPMP-Géographique] SlovaquieNote de contenu : Conference 5-9 September 2006 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=85306 Ševčíková, M., Sramek, P., Jongepierová-Hlobilová, I., Zimková, M. 2006. Working with site specific seeds and vegetation in Czech Republic and Slovakia, experiences and prospects. In: Soil-bioengineering : Ecological Restoration with native plants an seed material. HBLFA Raumberg-Gumpenstein, Irdning: 201-206.Zeleny most : green bridge / Tezebni unie (2007)
Titre : Zeleny most : green bridge Type de document : Imprimé Auteurs : Tezebni unie Editeur : Brno, Czech republic : Tezebni unie Année de publication : 2007 Importance : 40 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Revégétalisation
[CBNPMP-Géographique] République TchèquePermalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=82143 2007. Zeleny most : green bridge. Tezebni unie, Brno, Czech republic. 40 pp.Exemplaires (1)
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