Comparison of two methods characterising the seed bank of amphibious plants in submerged sediments / Karl-Georg Bernhardt in Aquatic Botany, vol. 88, n°2 (Année 2008)

Public [article]  inAquatic Botany > vol. 88, n°2 (Année 2008) . - pp. 171-177 Titre : Comparison of two methods characterising the seed bank of amphibious plants in submerged sediments Type de document : Livre Auteurs : Karl-Georg Bernhardt, Auteur ; Marcus Koch, Auteur ; Matthias Kropf, Auteur ; Elisabeth Ulbel, Auteur ; Josef Webhofer, Auteur Année de publication : 2008 Article en page(s) : pp. 171-177 Langues : Anglais Catégories : [ZG] Autriche [Espèces (in biblio)] Carex bohemica [Espèces (in biblio)] Coleanthus subtilis [Espèces (in biblio)] Elatine hexandra [Espèces (in biblio)] Eleocharis ovata [Thèmes] Banque de graines du sol [Thèmes] Plante aquatique Résumé : "We analysed the submerged soil seed bank of three fishponds in the Waldviertel region in Austria. We aimed our study at comparing the efficiency of two methods in detecting seeds quantitatively from soil samples of four characteristic mud-flat species, i.e. Carex bohemica, Coleanthus subtilis, Elatine hexandra, and Eleocharis ovata : the seedling-emergence and the rinsing method. Additionally, the actual vegetation was described based on 65 phytosociological relevés. Soil seed bank analyses were based on 31 samples representing the vegetation zonation. Mixed soil samples were portioned into 62 subsamples further treated with the two methods in parallel.Analysis of vegetation revealed a typical zonation with Isoëto-Nanojuncetea communities from the centre of dried-up fishponds to Phragmition/Magnocaricion communities at the shorelines. The study species were detected in the soil seed banks of all vegetation types, but seed abundances were generally higher in two fishponds characterised by muddy substrate than in one sandy mesotrophic pond (with the exception of E. hexandra). Therefore beside the water regime and the vegetation cover, additional factors such as soil type are likely to influence the soil seed bank composition of submerged sediments. The quantitative comparison of the seedling-emergence and the rinsing method revealed significantly higher seed numbers by the rinsing method. As we obtained 5.7 times (Elatine hexandra) to 17.5 times (Coleanthus subtilis) more seeds by rinsing, the averaged detection failure across the four study species was at least 89.7% with the seedling-emergence method. In addition to this advantage in the quantitative description of submerged soil seed bank compositions, the rinsing method enables us to use seeds subsequently for conservation management and revegetation purposes." (source : auteur) Type de publication : périodique Référence biblio : Bernhardt K.-G., Koch M., Kropf M., Ulbel E., Webhofer J., 2008 - Comparison of two methods characterising the seed bank of amphibious plants in submerged sediments. Aquatic Botany, 88 (2) : 171-177. ID PMB : 71779 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71779 [article]

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Extinct grass refound in Austria / Karl-Georg Bernhardt in Plant talk, n°42 (Année 2005)

Public [article]  inPlant talk > n°42 (Année 2005) . - p. 17 Titre : Extinct grass refound in Austria Type de document : Livre Auteurs : Karl-Georg Bernhardt, Auteur Année de publication : 2005 Article en page(s) : p. 17 Langues : Français Catégories : [ZG] Autriche [Espèces (in biblio)] Coleanthus subtilis Résumé : Découverte par Wolfgang Holzner en 2000 de Coleanthus subtilis dans le nord de l'Autriche. Type de publication : périodique Référence biblio : Bernhardt K.-G., 2005 - Extinct grass refound in Austria. Plant talk, 42 : 17. ID PMB : 49044 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=49044 [article]

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Fitness and growth of the ephemeral mudflat species Cyperus fuscus in river and anthropogenic habitats in response to fluctuating water-levels / Jörg Böckelmann in Flora, vol. 234 (Année 2017)

Public [article]  inFlora > vol. 234 (Année 2017) . - pp. 135-149 Titre : Fitness and growth of the ephemeral mudflat species Cyperus fuscus in river and anthropogenic habitats in response to fluctuating water-levels Type de document : Livre Auteurs : Jörg Böckelmann, Auteur ; Karin Tremetsberger, Auteur ; Katerina Sumberova, Auteur ; Heinrich Grausgruber, Auteur ; Karl-Georg Bernhardt, Auteur Année de publication : 2017 Article en page(s) : pp. 135-149 Langues : Anglais Catégories : [habitats/milieux] ZH - Zones humides Mots-clés : Flooding  Isoëto-Nanojuncetea  Secondary habitats  Phenotypic plasticity  Soil seed bank  végétation Résumé : "Cyperus fuscus is a representative of threatened ephemeral wetland plant communities in summer-dry shoreline habitats. We compared variation and plasticity in traits related to fitness and growth of plants germinating from the soil seed bank and established plants from river and secondary anthropogenic habitats. Plants from sites at rivers, fishponds and fish storage ponds were cultivated and selfed to get homogenous seed material for a germination and an environmental manipulation experiment involving three different water regimes. Differences in traits and their plasticities were evaluated by means of linear mixed models. Cyperus fuscus followed a low-oxygen escape strategy when flooded. Seeds of plants derived from the soil seed bank germinated faster than seeds of plants derived from established plants suggesting that short-term selection of genotypes is mediated by the particular conditions on the site during germination. The experiment revealed significant differences between river and secondary habitats as well as between the soil seed bank and established plants. For example, plants from river habitats produced the highest number of culms with inflorescences. The difference was most evident under partial submergence. Plants from fish storage ponds rapidly reached the reproductive phase, but produced less culms with inflorescences. This seemingly allows them to cope with numerous and irregular disturbances and intensive substrate moisture changes. Our results suggest that populations have adapted to conditions at secondary habitats provided by fish farming during the last centuries." Type de publication : périodique Référence biblio : Böckelmann J., Tremetsberger K., Sumberova K., Grausgruber H., Bernhardt K.-G., 2017 - Fitness and growth of the ephemeral mudflat species Cyperus fuscus in river and anthropogenic habitats in response to fluctuating water-levels. Flora, 234 : 135-149. DOI : 10.1016/j.flora.2017.07.012 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66243 [article]

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Recovery plan and management programm for Coleanthus subtilis / Karl-Georg Bernhardt (2004) 

Public Titre : Recovery plan and management programm for Coleanthus subtilis Type de document : Livre Auteurs : Karl-Georg Bernhardt, Auteur Année de publication : 2004 Importance : np. Langues : Anglais Catégories : [ZG] Autriche [Espèces (in biblio)] Coleanthus subtilis [Thèmes] Banque de graines du sol [Thèmes] Conservation [Thèmes] Plante à forte valeur patrimoniale Résumé : "Coleanthus subtilis was classified as extinct plant species in Austria, following the Red Data Book. A few populations have been recovered during investigations of the soil seed bank of fish ponds in the "Waldviertel" region, and a recovery plan was initiates to stabilize populations. This plan contains a concept of soil seed banks analyses at fish ponds throughout the distribution area of Coleanthus subtilis. Additionally, the recovery plan includes a management concept focused on the fish ponds in the "Waldviertel" region, their regulary dessications and watering (management of water regime) as well as collecting and storing of seeds in an ex-situ seed bank (Botanic Garden) for future re-setting projects of Coleanthus subtilis (at new sites)." (source : auteur) Type de publication : article de livre Référence biblio : Bernhardt K.-G., 2004 - Recovery plan and management programm for Coleanthus subtilis. In : Kropf M., Bernhardt K.-G., 2004 - Proceedings of the "4th European Conference on the Conservation of Wild Plants: A workshop on the implementation of the Global Strategy for Plant Conservation in Europe. Valencia (Span) 17-20th September 2004". Planta Europa., np. ID PMB : 55650 En ligne : https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.629.8569&rep=rep1&type [...] Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=55650

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The importance of soil seed banks for conservation of nearly extinct species : insights from Coleanthus subtilis (Poaceae) / Karl-Georg Bernhardt (2004)

Public Titre : The importance of soil seed banks for conservation of nearly extinct species : insights from Coleanthus subtilis (Poaceae) Type de document : Livre Auteurs : Karl-Georg Bernhardt, Auteur ; Elisabeth Ulbel, Auteur Année de publication : 2004 Importance : np. Langues : Anglais Catégories : [ZG] Autriche [Espèces (in biblio)] Coleanthus subtilis [Thèmes] Banque de graines du sol [Thèmes] Conservation [Thèmes] Plante à forte valeur patrimoniale Résumé : "The importance of soil seed banks and their dynamics for plants species conservation is demonstrated by the example of the annual Poacea Coleanthus subtilis. The differencies in the distribution patterns of endangered plants in the underground vegetation (soil sedd bank) versus actual vegetation cover are illuminated and discussed in light of given informations in different European "Red Data Books". Type de publication : article de livre Référence biblio : Bernhardt K.-G., Ulbel E., 2004 - The importance of soil seed banks for conservation of nearly extinct species : insights from Coleanthus subtilis (Poaceae). In : Kropf M., Bernhardt K.-G., 2004 - Proceedings of the "4th European Conference on the Conservation of Wild Plants: A workshop on the implementation of the Global Strategy for Plant Conservation in Europe. Valencia (Span) 17-20th September 2004". Planta Europa., np. ID PMB : 55651 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=55651

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