Détail de l'auteur
Auteur Ása L. Aradóttir |
Documents disponibles écrits par cet auteur (3)
Affiner la rechercheEcological restoration with native species in Iceland / Ása L. Aradóttir (2006)
est un extrait de Soil-bioengineering : Ecological Restoration with native plants an seed material / Bernhard Krautzer (2006)
Titre : Ecological restoration with native species in Iceland Type de document : Extrait d'ouvrage Auteurs : Ása L. Aradóttir ; Magnus H. Johannsson Année de publication : 2006 Importance : p. 175-179 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Revégétalisation
[CBNPMP-Géographique] IcelandNote de contenu : Conference 5-9 September 2006 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=85301 Aradóttir, Ása L., Johannsson, Magnus H. 2006 Ecological restoration with native species in Iceland. In: Soil-bioengineering : Ecological Restoration with native plants an seed material. HBLFA Raumberg-Gumpenstein, Irdning: 175-179.Microsite availability and establishment of native species on degraded and reclaimed sites / Asrun Elmarsdottir (2003)
Titre : Microsite availability and establishment of native species on degraded and reclaimed sites Type de document : Tiré à part de revue Auteurs : Asrun Elmarsdottir ; Ása L. Aradóttir ; Trlica Année de publication : 2003 Importance : 815-823 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Restauration des écosystèmes
[CBNPMP-Thématique] RevégétalisationNote de contenu : 1 Restoration of native plant communities on previously disturbed land requires the identification and modification of environmental factors that impede or restrict ecosystem succession or development. One of the key factors in successful reclamation is to ensure colonization and persistence of native species within an area. Therefore, the identification of microsite types that favour colonization by native species should improve our ability to successfully reclaim degraded areas.
2 The objectives of this study were to (i) identify and describe microsite types that were conducive to the establishment of five native plant species (Euphrasia frigida, Galium normanii, Thymus praecox, Cerastium spp. and Rumex acetosa) on degraded and reclaimed sites in Iceland; and (ii) to determine the effects of reclamation activities that included the application of manure and inorganic fertilizer on the distribution of microsite types and seedling establishment. Reclamation sites of different ages were examined on an eroded area where the target community was a grass or shrub heath.
3 The spatial distribution of plant establishment was not random but varied among microsite types and study sites. More seedlings than expected were found in microsite types characterized by small rocks and biological soil crusts. These may have entrapped seed and provided more soil stability and moisture than other microsite types. The cover of these microsite types varied among the study sites but the pattern of seedling establishment among the five native forbs was similar.
4 Synthesis and applications. Practical reclamation methods are improved by identifying those factors that promote successful seedling establishment by native species. Application of fertilizer without additional seeding proved to be a simple reclamation approach that increased the availability of one favourable microsite type, enhanced the establishment of native species and subsequently allowed vegetation cover to expand. Seed of native plants may be difficult to obtain commercially, but this approach can be used on degraded land where propagules are available but recovery is slowed by soil instability or nutrient limitations.Lien pérenne : DOI : 10.1046/j.1365-2664.2003.00848.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=134222 Elmarsdottir, Asrun, Aradóttir, Ása L., Trlica 2003 Microsite availability and establishment of native species on degraded and reclaimed sites. Journal of applied ecology, 40 : 815-823.Documents numériques
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Titre : Turf transplants for restoration of alpine vegetation : does size matter ? Type de document : Tiré à part de revue Auteurs : Ása L. Aradóttir Année de publication : 2012 Importance : 439-446 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Restauration des écosystèmes
[CBNPMP-Thématique] RevégétalisationNote de contenu : 1. Turfs transplanted from native vegetation can be used to restore diverse plant communities on disturbed sites. There is, however, limited understanding of optimal turf size and the tolerance of different plant communities and species to transplanting. 2. The effects of turf size in restoration of alpine plant communities were studied in SW-Iceland. Treatments tested in 2-m2 plots were as follows: planting of sixteen 5 × 5 cm turfs, four 10 × 10 cm turfs, one 20 × 20 cm turf or one 30 × 30 cm turf; a 20 × 20 cm turf shredded and spread over the plot and controls without turfs. The 10-cm thick turfs were extracted from nearby heath and grassland vegetation and planted in mineral soil and road verges at 260–410 m elevation. Species composition, cover and colonization were monitored for three growing seasons. 3. Grassland vegetation tolerated division into small turfs better than heath vegetation, but responses varied by functional groups. Cover of dwarf-shrubs decreased with decreasing turf size; grass cover was highest in plots with 5 × 5 cm turfs and lowest in plots with shredded turfs, while moss cover increased most rapidly in plots with shredded turfs. 4. Synthesis and applications. Optimum turf size for the restoration of native species varied among functional groups of plants and decreased as follows: evergreen dwarf-shrubs > deciduous dwarf-shrubs > sedges > grasses > mosses. Turfs that are at least 20–30 cm in diameter may be needed for the transplantation of dwarf-shrubs, while turfs as small as 5 cm in diameter can be used to establish many grass species. Even smaller units can be used to facilitate moss colonization. Turfs that are salvaged from development projects can be a valuable source of native species for use in restoration schemes. Turf size for transplanting should be selected with regard to donor vegetation, growth form and abundance of the target species.
Lien pérenne : DOI : 10.1111/j.1365-2664.2012.02123.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=135231 Aradóttir, Ása L. 2012 Turf transplants for restoration of alpine vegetation : does size matter ? Journal of applied ecology, 49 : 439-446.Exemplaires (1)
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