Résultat de la recherche
2 recherche sur le mot-clé
'Semi-natural grassland' 




Effects of landscape composition, species pool and time on grassland specialists in restored semi-natural grasslands / Emelie Waldén in Biological conservation, vol. 214 (Octobre 2017)
[article]
Titre : Effects of landscape composition, species pool and time on grassland specialists in restored semi-natural grasslands Type de document : texte imprimé Auteurs : Emelie Waldén, Auteur ; Erik Öckinger, Auteur ; Marie Winsa, Auteur ; Régina Lindborg, Auteur Année de publication : 2017 Article en page(s) : pp. 176-183 Langues : Anglais (eng) Mots-clés : biodiversité Landscape composition Recolonisation restauration Semi-natural grassland Species pool Résumé : "Habitat restoration is an important complement to protecting habitat for the conservation of biodiversity. Semi-natural grasslands are target habitats for ecological restoration in temperate Europe. Restoration of abandoned semi-natural grasslands often relies on spontaneous colonisation of plant species from the soil seed bank or the surrounding landscape. Although many studies show that the regional species pool is important for upholding local diversity, its effect on restoration outcome in semi-natural grasslands is poorly known. In this multi-landscape study, we examined grassland specialist species occurring in restored grasslands and the effect of specialist species pool, landscape composition and local temporal factors. We found that specialist richness and frequency was positively affected by specialist richness and frequency in the surrounding landscape. Specialist richness in the restored grasslands also increased with time since restoration. Moreover, specialist frequency in the restored grassland increased with the proportion of semi-natural and remnant grassland habitats in the landscape. We also found a positive relationship between the proportion of species occurring in both the restored grassland and its surrounding landscape and time since restoration, in landscapes with high proportions of semi-natural grasslands. This suggests that both temporal factors, as well as the landscape composition and species pool, affect plant recolonisation in restored semi-natural grasslands." Type de publication : périodique Référence biblio : Waldén E., Öckinger E., Winsa M., Lindborg R., 2017 - Effects of landscape composition, species pool and time on grassland specialists in restored semi-natural grasslands. Biological conservation, 214 : 176-183. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66248
in Biological conservation > vol. 214 (Octobre 2017) . - pp. 176-183[article]Exemplaires(0)
Disponibilité aucun exemplaire Pilularia minuta Durieu (Marsileaceae) discovered in south-eastern-Sicily: new insights on its ecology, distribution and conservation status / Pietro Minissale in Botany letters, vol. 164, n°3 (Année 2017)
[article]
Titre : Pilularia minuta Durieu (Marsileaceae) discovered in south-eastern-Sicily: new insights on its ecology, distribution and conservation status Type de document : texte imprimé Auteurs : Pietro Minissale, Auteur ; José Antonio Molina, Auteur ; Saverio Sciandrello, Auteur Année de publication : 2017 Article en page(s) : pp. 197-208 Langues : Anglais (eng) Mots-clés : Semi-natural grassland Résumé : "Pilularia minuta Durieu (Marsileaceae) is a rare and endangered Mediterranean species of temporary ponds. It occurs in different countries all around the Mediterranean Basin with a scattered distribution. In Italy; this species is known for Sardinia; Apulia and recently for western Sicily. During a field investigation; the species was found in the Hyblaean Plateau (south-eastern Sicily). The aim of this work is to analyze the ecological features and conservation status of P. minuta populations occurring in Sicily. The floristic composition of Pilularia minuta plant communities were determined using the standard relevé method. Three spatially differentiated belts with specific floristic compositions emerged from the numerical analysis (UPGMA method; Euclidean distance coefficient) and from canonical correspondence analysis (CCA); mainly correlated to the water level. Our results showed that temporary ponds mainly host amphibian vegetation belonging to the phytosociological class Isoëto-Nanojuncetea; which includes pioneering annual plant communities growing on periodically flooded soils. Most species belong to the Mediterranean element; with therophytes as the dominant life form. The floristic richness and diversity index of these plant communities increased from the inner belt towards the upper belt. Finally; a synthesis of all known localities of Pilularia minuta from the Mediterranean area is given; together with a new assessment of the risk status for Sicily and Italy." Type de publication : périodique Référence biblio : Minissale P., Molina J., Sciandrello S., 2017 - Pilularia minuta Durieu (Marsileaceae) discovered in south-eastern-Sicily: new insights on its ecology, distribution and conservation status. Botany letters, 164 (3) : 197-208. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66254
in Botany letters > vol. 164, n°3 (Année 2017) . - pp. 197-208[article]Exemplaires(1)
Cote Localisation Disponibilité P0177-6 Brest Exclu du prêt