Carla Cepeda^1,*, Gabriel Oliva^1,2, Daniela Ferrante^1,2

Phyton-International Journal of Experimental Botany, Vol.93, No.7, pp. 1383-1401, 2024, DOI:10.32604/phyton.2024.052534 - 30 July 2024

Abstract Semiarid Patagonia represents 25% of the rangeland area in Argentina, and sheep overgrazing has degraded about a third of it in the past. In this century, depleted domestic stocks have mostly stabilized, but Guanaco populations have grown. These native camelids share habitat and diets with sheep, but their effect on vegetation is poorly understood and has long been debated. We set up an exclusion experiment in Monte León and Cañadón Vaca, a semiarid shrubland grassland in southern Patagonia, currently grazed only by guanacos. Vegetation baselines were studied in 2016 in twelve plots, and half of… More >

Villamil MB¹, NM Amiotti², N Peinemann³

Phyton-International Journal of Experimental Botany, Vol.80, pp. 193-201, 2011, DOI:10.32604/phyton.2011.80.193

Abstract Demand for greater cattle production at the El Caldenal area in central Argentina has resulted in overgrazing in a patchy grassland structure. Patches are clearly identified on the basis of dominant plant species resulting from their grazing history. Our primary objective was to examine the influence of individual plants at each patch on the local multivariate pattern of soil nutrients, assessing the magnitude of the association between the concentration of nutrients in the plant and its underlying soil. Canonical discriminant analysis highlighted the important role of soil organic matter, available P, and Zn content of More >