Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland
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 i...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_1146609X_v86_n_p72_Magnano |
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todo:paper_1146609X_v86_n_p72_Magnano2023-10-03T16:08:06Z Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland Magnano, A.L. Nanni, A.S. Krug, P. Astrada, E. Vicari, R. Quintana, R.D. 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 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 JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1146609X_v86_n_p72_Magnano |
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Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 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 |
| topic_facet |
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 |
| description |
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 |
| format |
JOUR |
| author |
Magnano, A.L. Nanni, A.S. Krug, P. Astrada, E. Vicari, R. Quintana, R.D. |
| author_facet |
Magnano, A.L. Nanni, A.S. Krug, P. Astrada, E. Vicari, R. Quintana, R.D. |
| author_sort |
Magnano, A.L. |
| title |
Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland |
| title_short |
Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland |
| title_full |
Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland |
| title_fullStr |
Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland |
| title_full_unstemmed |
Effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass Hymenachne pernambucense (Poaceae) from a temperate fluvial wetland |
| title_sort |
effects of livestock exclusion on density, survival and biomass of the perennial sagebrush grass hymenachne pernambucense (poaceae) from a temperate fluvial wetland |
| url |
http://hdl.handle.net/20.500.12110/paper_1146609X_v86_n_p72_Magnano |
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