Article « Functional Diversity Effects of Vegetation on Runoff to Design Herbaceous Hedges for Sediment Retention », par Léa Kervroëdan, Romain Armand, Mathieu Saunier et Michel-Pierre Faucon, paru dans Diversity, volume 12(4), 2020

Résumé

Background

Functional diversity effects on ecosystem processes, like on soil erosion, are not fully understood. Runoff and soil erosion in agricultural landscapes are reduced by the hydraulic roughness (HR) of vegetation patches, which furthers sediment retention. Vegetation with important stem density, diameters, leaf areas, and density impact the HR. A functional structure composed of these negatively correlated traits involved in the increase of the HR would constitute a positive effect of the functional diversity.

Methods

Runoff simulations were undertaken on four mono-specific and two multi-specific communities, using herbaceous plant species from North-West Europe, presenting six contrasting aboveground functional traits involved in the HR increase. Results: An effect of dominant traits in the community was found on the HR, identified as the community-weighted leaf density. The non-additive effect of functional diversity on the HR could be explained by the presence of species presenting large stems in the communities with high functional diversity.

Conclusion

We argued that functional diversity effect on the HR could change due to idiosyncratic effects of the plant traits, which would be influenced by soil properties, phylogeny diversity, and plant species interactions. These findings constitute an advancement in the understanding of plant trait assemblage on runoff and soil erosion processes.

URL : Pour obtenir l'article

Type : article de revue

Auteur(s) : KERVROËDAN, Léa, ARMAND, Romain, SAUNIER, Mathieu et FAUCON, Michel-Pierre

Date : 31/03/2020

Institution(s) / publication(s) :

  • Diversity

Référence bibliographique :

KERVROËDAN, Léa, ARMAND, Romain, SAUNIER, Mathieu et FAUCON, Michel-Pierre, 2020. Functional Diversity Effects of Vegetation on Runoff to Design Herbaceous Hedges for Sediment Retention. Diversity. 31 mars 2020. Vol. 12, n° 4, pp. 131. DOI 10.3390/d12040131.

Droits : Document soumis à copyright

Public(s) cible(s) :

  • techniciens

Contenu : Connaissance des phénomènes, théorie

Domaine(s) technique(s) :

  • aménagements d’hydraulique douce

Mots clés :

  • Aménagements d'hydraulique douce / zones tampons
  • haie herbacée
  • Traits fonctionnels
  • Simulateur de ruissellement
  • Données expérimentales
  • Frein hydraulique