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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 : texte imprimé 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 (eng) 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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Rare wetland grass Coleanthus subtilis in Central and Western Europe - current distribution, habitat types, and threats / Elke Richert in Acta societatis botanicorum poloniae, vol. 85, n°3 (Année 2016)  

Public [article]  inActa societatis botanicorum poloniae > vol. 85, n°3 (Année 2016) . - pp. 1-16 Titre : Rare wetland grass Coleanthus subtilis in Central and Western Europe - current distribution, habitat types, and threats Type de document : texte imprimé Auteurs : Elke Richert, Auteur ; Roland Achtziger, Auteur ; Zygmunt Dajdok, Auteur ; André Günther, Auteur ; Hermann Heilmeier, Auteur ; Annette Hübner, Auteur ; Henriette John, Auteur ; Katerina Sumberova, Auteur Année de publication : 2016 Article en page(s) : pp. 1-16 Langues : Anglais (eng) Mots-clés : EU Habitats Directive  fishponds  Isoëto-Nanojuncetea  management  species protection  temporary wetland vegetation Résumé : "The moss grass Coleanthus subtilis (Tratt.) Seidl is a rare, diminutive grass which grows on wet muddy bottoms of drained water bodies displaying a high degree of water level dynamics, such as fishponds or water reservoirs. Due to the temporal character of its habitat, C. subtilis has a very short life cycle of only a few weeks. Therefore, the species and its habitats are legally protected on both national and international levels. This paper focuses on habitats and the conservation of C. subtilis in Central and Western Europe. For the period of 2000–2013, the Czech Republic with more than 200 sites represents the main distribution area of this species in Central and Western Europe. During the same period, C. subtilis was recorded from 45 sites in three regions of Germany (33 Lusatia, 11 Ore Mountains, 1 Mid-Elbe River), 16 sites in France, 13 sites in Poland, and four sites in Austria. Since 2000, the number of records within these seven regions seems to have followed different trends: whereas two regions (Lusatia, Germany and southern Poland) became newly colonized and many populations established, in one region (Ore Mountains, Germany) the number of records diminished. Owing to its specific life cycle, both reproduction success and maintenance of C. subtilis populations are closely linked to the prevailing water level regime, mainly dependent on the management of the water body. Management for the conservation of C. subtilis populations should consider the entire complex of water bodies, as well as individual ponds. For the preservation of the species, at least one pond in each complex should be drained every year and each pond should be drained at least once within 5 years. Depending on local climatic conditions, ponds should be drained for 8–10 weeks during the time period from mid-March to mid-November." (source : auteurs) Type de publication : périodique Référence biblio : Richert E., Achtziger R., Dajdok Z., Günther A., Heilmeier H., Hübner A., John H., Sumberova K., 2016 - Rare wetland grass Coleanthus subtilis in Central and Western Europe - current distribution, habitat types, and threats. Acta societatis botanicorum poloniae, 85 (3) : 1-16. ID PMB : 68328 DOI : 10.5586/asbp.3511 En ligne : https://pbsociety.org.pl/journals/index.php/asbp/article/view/asbp.3511/5986 Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=68328 [article]

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