| Titre : |
Assessment of ex-arable land conversion in grassland restoration program using local or commercial seed mixtures in Gers (32 - France) |
| Type de document : |
Numérique |
| Auteurs : |
Guillaume Giraudeau |
| Editeur : |
Strasbourg : Université de Strasbourg |
| Année de publication : |
2025 |
| Importance : |
65 p. |
| Langues : |
Anglais (eng) |
| Catégories : |
[CBNPMP-Géographique] Gers (France)
[CBNPMP-Thématique] Restauration des écosystèmes
[CBNPMP-Thématique] Revégétalisation
|
| Résumé : |
This study evaluates the early trajectories of semi-natural grasslands in agricultural landscape by comparing three grassland conditions: restored with local seed mixtures, restored with commercial seed mixtures, and target reference grasslands. The main objective was to analyze the evolution of plant composition, functional diversity and patterns, as well as successional dynamics during the first three years post-restoration. Target grasslands displayed high species richness and a diverse syntaxonomic composition, encompassing three main syntaxons (Agrostietea stoloniferae, Arrhenatheretea elatioris and Festuco-Brometea) that collectively provided a broad functional spectrum. Commercial grasslands (restored with commercial seed mixtures) were dominated by perennial, tall, competitive grasses promoted by residual soil nutrient enrichment. These species-poor seed mixtures used for restoration, with a low occurrence of target species and a structural dominance of the resulting communities, constrained target species recruitment and overrode the expected annual-dominated stage, and are expected to slow progression toward later successional stages. These communities exhibited low functional diversity, most likely linked to strong competitive exclusion. In contrast, Local grasslands displayed higher species and functional diversity, resulting from the combined influence of local and commercial seed mixtures, the soil seed bank, and possibly dispersal inputs. A greater target species occurrence and trait functional similarity to Target grasslands was found. Finally, seed mixture composition used for restoration appeared as a major driver of early successional trajectories. Long term monitoring, integrating landscape-scale processes and soil historical legacies may help to better understand variability in grassland trajectories. |
| Permalink : |
https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=155038 |
Giraudeau, Guillaume
, 2025.
Assessment of ex-arable land conversion in grassland restoration program using local or commercial seed mixtures in Gers (32 - France).
Université de Strasbourg, Strasbourg.
65 pp.
|
Assessment of ex-arable land conversion in grassland restoration program using local or commercial seed mixtures in Gers (32 - France) (2025)
