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Abstract:

In Argentina, the intensification of soybean production has displaced a substantial proportion of cattle ranching to fluvial wetlands such as those in the Delta of the Paraná River. Cattle grazing affects structure and dynamics of native forage plants but there is little information on this impact in populations from fluvial wetlands. This study addresses the effect of cattle ranching on density, survival, mean life-span and aerial biomass of Hymenachne pernambucense (Poaceae), an important forage species in the region. The study was carried out monthly for one year in permanents plots subject to continuous grazing and plots excluded from grazing in the Middle Delta of the Paraná River. In plots excluded from grazing, tillers showed significantly higher population density and survival, and a two-fold increase in mean life-span, while continuous grazing decreased survival of cohorts. The largest contribution to tiller density in ungrazed and grazed populations was made by spring and summer cohorts, respectively. Total and green biomass were significantly higher in the ungrazed population, with highest differences in late spring-early summer. Cattle grazing affected the relationship between tiller density and green biomass suggesting that cattle prefer sprouts because they are more palatable and nutritious than older tissue. © 2017 Elsevier Masson SAS

Registro:

Documento: Artículo
Título:Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland
Autor:Magnano, A.L.; Nanni, A.S.; Krug, P.; Astrada, E.; Vicari, R.; Quintana, R.D.
Filiación:Universidad Nacional de San Martín (UNSAM), Instituto de Investigación e Ingeniería Ambiental (3iA) and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Universidad de Buenos Aires, Departamento de Ecología, Genética y Evolución, FCEyN, Buenos Aires, Argentina
Instituto Argentino de Investigaciones de las Zonas Áridas (IADIZA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Cuyo, Gobierno de Mendoza. Av. Ruiz Leal s/n, Parque General San Martín (C.P. 5500), Mendoza, Argentina
Palabras clave:Argentina; Delta of the Paraná River; Freshwater marshes; Grazing impact; Population ecology; biomass; cattle; freshwater environment; grass; livestock farming; population density; population ecology; ranching; seasonal variation; survival; wetland; Argentina; Parana Delta; Artemisia tridentata; Bos; Glycine max; Hymenachne; Poaceae
Año:2018
Volumen:86
Página de inicio:72
Página de fin:78
DOI: http://dx.doi.org/10.1016/j.actao.2017.12.006
Título revista:Acta Oecologica
Título revista abreviado:Acta Oecol.
ISSN:1146609X
CODEN:ACOEE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1146609X_v86_n_p72_Magnano

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Citas:

---------- APA ----------
Magnano, A.L., Nanni, A.S., Krug, P., Astrada, E., Vicari, R. & Quintana, R.D. (2018) . Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland. Acta Oecologica, 86, 72-78.
http://dx.doi.org/10.1016/j.actao.2017.12.006
---------- CHICAGO ----------
Magnano, A.L., Nanni, A.S., Krug, P., Astrada, E., Vicari, R., Quintana, R.D. "Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland" . Acta Oecologica 86 (2018) : 72-78.
http://dx.doi.org/10.1016/j.actao.2017.12.006
---------- MLA ----------
Magnano, A.L., Nanni, A.S., Krug, P., Astrada, E., Vicari, R., Quintana, R.D. "Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland" . Acta Oecologica, vol. 86, 2018, pp. 72-78.
http://dx.doi.org/10.1016/j.actao.2017.12.006
---------- VANCOUVER ----------
Magnano, A.L., Nanni, A.S., Krug, P., Astrada, E., Vicari, R., Quintana, R.D. Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland. Acta Oecol. 2018;86:72-78.
http://dx.doi.org/10.1016/j.actao.2017.12.006