1. Floristic associations and filtering ability of riparian vegetation strips
- Author
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Gustavo Carlos María Giaccio, Cabria Fabian, and Laterra Pedro
- Subjects
Willow ,Arroyos pampeanos ,Physiology ,Otras Ciencias Biológicas ,Servicios ecosistémicos ,Introduced species ,Propiedades del Suelo ,Ecosistemas ribereños ,Plant Science ,010501 environmental sciences ,Cursos de Agua ,Agua Superficial ,01 natural sciences ,Biochemistry ,Franjas de vegetación ribereñas ,Ciencias Biológicas ,purl.org/becyt/ford/1 [https] ,Rivers ,Surface Water ,Organic matter ,Asociaciones ribereñas ,purl.org/becyt/ford/1.6 [https] ,Servicio de los Ecosistemas ,Ecosystem Services ,Escorrentía Agrícola ,0105 earth and related environmental sciences ,Riparian zone ,chemistry.chemical_classification ,geography ,Vegetation ,geography.geographical_feature_category ,biology ,Soil Properties ,Vegetación ,Comunidades ribereñas ,04 agricultural and veterinary sciences ,biology.organism_classification ,Bulk density ,Infiltration (hydrology) ,Agronomy ,chemistry ,Agricultural Runoff ,Filtrado de escorrentía superficial ,Soil water ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Surface runoff ,CIENCIAS NATURALES Y EXACTAS - Abstract
The analysis of lateral flow runoff of superficial nutrients and sediments from an agricultural origin and their retention by infiltration of riparian vegetation strips are of great importance in reducing the agricultural externalities on surface water quality. The aim of this study was to relate soil infiltration to the main biophysical properties of riparian environments in the Pampa Austral of Argentina, defined by the composition of its plant community and the coverage of exotic species. We explored the relationships between hydraulic conductivity (Ks ) and aboveground, litter and root biomasses, organic matter concentration, terrain slope, soil bulk density, texture and electrical conductivity. We determined eight floristic associations through the classification of 65 censuses of vegetation. Three of the associations were dominated by native grasses, three by exotic grasses and two presented a layer of exotic willow trees in combination with native and invasive grasses. The mean Ks in soils from the floristic associations with trees and from the associations of native grasses without trees were higher than in soils from the associations of exotic grasses without trees. Significant relationships were found between Ks and the soil properties that are sensitive to the influence of vegetation, suggesting that the relationships between floristic composition and infiltration could be explained partly due to causal relationships. The analysis of lateral flow runoff of superficial nutrientsand sediments from an agricultural origin and their retentionby infiltration of riparian vegetation strips are of great importancein reducing the agricultural externalities on surface water quality.The aim of this study was to relate soil infiltration to the main biophysicalproperties of riparian environments in the Pampa Australof Argentina, defined by the composition of its plant communityand the coverage of exotic species. We explored the relationships betweenhydraulic conductivity (Ks) and aboveground, litter and rootbiomasses, organic matter concentration, terrain slope, soil bulk density,texture and electrical conductivity. We determined eight floristicassociations through the classification of 65 censuses of vegetation.Three of the associations were dominated by native grasses, threeby exotic grasses and two presented a layer of exotic willow trees incombination with native and invasive grasses. The mean Ks in soilsfrom the floristic associations with trees and from the associationsof native grasses without trees were higher than in soils from theassociations of exotic grasses without trees. Significant relationshipswere found between Ks and the soil properties that are sensitive tothe influence of vegetation, suggesting that the relationships betweenfloristic composition and infiltration could be explained partly due tocausal relationships. Fil: Giaccio, Gustavo Carlos María. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Barrow; Argentina Fil: Laterra, Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Fundación Bariloche; Argentina Fil: Cabria, Fabián Néstor. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina
- Published
- 2017