Mots-clés
Chine Distribution spatiale Domaine semi-aride Erosion des sols Erosion hydrique Graine Loess Pente de versant Plateau Ravinement Simulation de pluie Végétation China Gully erosion Loess Plateau Rainfall simulation Seed Semi-arid area Slope gradient Soil erosion Spatial distribution Vegetation Water erosion Abarrancamiento Campo semiárido China Distribución espacial Erosión de los suelos Erosión hídrica Inclinación de la vertiente Loess Meseta Simulacíon de lluvia VegetaciónEffects of seed morphology on seed removal and plant distribution in the Chinese hill-gully Loess Plateau region
Auteur(s) et Affiliation(s)
WANG, D.
College of Resources and Environment, North-West AandF Univ., Yangling, Chine
JIAO, J.
College of Resources and Environment, North-West AandF Univ., Yangling, Chine
Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine
LEI, D.
College of Resources and Environment, North-West AandF Univ., Yangling, Chine
Henan Building Materials Research and Design Inst., Zengzhou, Chine
WANG, N.
Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine
DU, H.
Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine
JIA, Y.
Inst. of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Shaanxi, Yangling, Chine
College of Water Conservancy, Agricultural Univ., Shenyang, Chine
Description :
This study aimed at understanding how seed morphology affects seed removal, consequently, interacts with plant distribution. Rainfall simulation experiments were conducted over 1 m2 plots with slope of 20° at intensity of 120 mm/h for 30 min, accompanying with vegetation survey of 70 sample plots from 16 eroded slopes. It is showed that seed mass played a key role in the seed removal process. Seed morphology resisting water erosion like big mass, extreme elongated shape, appendages, and mucilage segregation was useful for species to develop on eroded slopes. However, there was no uniform relationship between species distribution and seed removal by water erosion. Some species with seeds resisting water erosion prefer gentle slope to eroded slope, while some species with high seed removal can develop on eroded slope. Some species that distribute on eroded slope may be mainly determined by plant strategies or soil surface characteristics.
Type de document :
Article de périodique
Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 104, p. 144-152, nombre de pages : 9, Références bibliographiques : 33 ref.
Date :
2013
Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)