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Título: | The impact of livestock grazing on the spatial pattern of vegetation in north-eastern Patagonia, Argentina |
Autor(es): | Funk, Flavia Alejandra Peter, Guadalupe Leder, Cintia Vanesa Loydi, Alejandro Kröpfl, Alicia Inés Distel, Roberto Alejandro |
Fecha de publicación: | 28-abr-2018 |
Editorial: | Taylor & Francis Ltd |
Citación: | FUNK, F.A., G. PETER, C.V. LEDER, A. LOYDI, A.I. KRÖPFL & R.A. DISTEL. 2018. The impact of livestock grazing on the spatial pattern of vegetation in north-eastern Patagonia, Argentina. Plant Ecology & Diversity 11: 219-227, DOI: 10.1080/17550874.2018.1473519. |
Revista: | Plant Ecology & Diversity |
Abstract: | Background: The occurrence of shrub patches, alternating with either bare soil or low herbaceous cover, is a common feature in arid and semi-arid shrublands throughout the world. This patchy pattern of vegetation may result from water limitation, modulated by plant interactions; grazing (offtake and tramping) by livestock may cause further patchiness vegetation structure. Aims: We hypothesised that vegetation patchiness in the semi-arid shrublands of north-eastern Patagonia would be increased by livestock grazing, but not by positive interactions between adult plants of shrubs and grasses. Methods: We compared vegetation cover and pattern at three grazing intensities (exclosure, light and heavy grazing) and measured the growth of a representative shrub and grass in the presence and absence of the other to quantify the role of plant-to-plant interactions and its interaction with grazing for vegetation structure. Results: In the grazing exclosure and in moderately grazed areas, vegetation cover among shrub patches was larger, whereas the top cover of shrubs was lower than in the heavily grazed areas. We did not find any evidence of positive interactions between shrub and grass life forms. Conclusions: Our results were consistent with the hypothesis that livestock grazing increased the formation of patchy vegetation cover in arid and semi-arid shrublands. |
Resumen: | Background: The occurrence of shrub patches, alternating with either bare soil or low herbaceous cover, is a common feature in arid and semi-arid shrublands throughout the world. This patchy pattern of vegetation may result from water limitation, modulated by plant interactions; grazing (offtake and tramping) by livestock may cause further patchiness vegetation structure. Aims: We hypothesised that vegetation patchiness in the semi-arid shrublands of north-eastern Patagonia would be increased by livestock grazing, but not by positive interactions between adult plants of shrubs and grasses. Methods: We compared vegetation cover and pattern at three grazing intensities (exclosure, light and heavy grazing) and measured the growth of a representative shrub and grass in the presence and absence of the other to quantify the role of plant-to-plant interactions and its interaction with grazing for vegetation structure. Results: In the grazing exclosure and in moderately grazed areas, vegetation cover among shrub patches was larger, whereas the top cover of shrubs was lower than in the heavily grazed areas. We did not find any evidence of positive interactions between shrub and grass life forms. Conclusions: Our results were consistent with the hypothesis that livestock grazing increased the formation of patchy vegetation cover in arid and semi-arid shrublands. |
URI: | http://rid.unrn.edu.ar/handle/20.500.12049/11369 |
Identificador DOI: | https://doi.org/10.1080/17550874.2018.1473519 |
ISSN: | 1755-0874 |
Otros enlaces: | https://www.tandfonline.com/doi/full/10.1080/17550874.2018.1473519 |
Aparece en las colecciones: | Artículos |
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Este documento es resultado del financiamiento otorgado por el Estado Nacional, por lo tanto queda sujeto al cumplimiento de la Ley N° 26.899
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