Arid and Semiarid Rangelands of Argentina

  title={Arid and Semiarid Rangelands of Argentina},
  author={Carlos Alberto Busso and Osvaldo Alberto Fernandez},
Two thirds of continental Argentina are arid and semiarid rangelands. These rangelands include five phytogeographic regions: (1) Puna, (2) Chaco Occidental, (3) Monte, (4) Caldenal, and (5) Patagonia. This review includes and begins with a brief overview of the climate, soil, and vegetation characteristics of each region. After that, the major causes of degradation or desertification of these territories are indicated, together with the previous and current impacts on the water resources; the… 
Plant Species and Defoliation Effects on Soil Nitrogen Mineralization in a Semiarid Rangeland of Argentina
The objective of this study was to evaluate the effects of moderate defoliation and grass species on soil nitrogen (N) mineralization in a semiarid grassland of northeastern Patagonia, Argentina.
Adequate Management of Post-Fire Defoliation Would Not Affect the Metabolic Activity of Axillary Buds in Grasses
It is found that moderate defoliation after controlled burning does not affect the survival and productivity of the desirable species and the treatments limited neither bud production nor their metabolic activity.
Inoculation with Native Actinobacteria May Improve Desert Plant Growth and Survival with Potential Use for Restoration Practices
Native Actinobacteria studied may increase plant species survival and growth by improving their nutritional status, suggesting their potential to facilitate vegetation establishment and, therefore, being good candidates for restoration practices.
Genetic variance distribution of SSR markers and economically important quantitative traits in a progeny trial of Prosopis chilensis (Leguminosae): implications for the ‘Algarrobo’ management programme
The results indicate that most morphological variation was found among individuals within families (~95 per cent), and in order to recover germplasm provenance diversity, the recommendation would be to include seeds from individuals from at least the Villa Unión, Fiambalá and Mogna-Chilecito areas.


Towards an increased and sustainable production in semi-arid rangelands of central Argentina: two decades of research☆
Abstract The Caldenal or Southern Espinal is a temperate, semi-arid region covering about 40,000 km 2 in central Argentina. Cattle raising on natural vegetation is the major economic activity in this
Productivity, management and development problems in the arid rangelands of the central Mendoza plains (Argentina)
Although research on resource inventory and basic ecological processes in the Mendoza plains should carry on, the emphasis should henceforth be devoted to the consequences of resource management alternatives on overall arid land productivity, i.e. research for development.
Cattle Raising in Central, Semiarid Rangelands of Argentina
It is proved that a few simple management guidelines and a short-duration, high-intensity grazing system would increase beef production per acre, while at the same time maintaining the forage resource in the community.
The challenge of rangeland degradation in a temperate semiarid region of Argentina: The Caldenal
This work provides a comprehensive assessment of the impact of major stresses (drought, herbivory, fire, fire) on grass and shrub responses, as well as more basic studies on the ecophysiology of these species.
Structure of vegetation patches in northwestern Patagonia, Argentina
Correlations between greatest and lowest diameters, mound height, maximum plant height and distance to the closest vegetation patch were all significant and conservation of vegetation patches is crucial to prevent increased soil erosion and desertification in the study ecological system.
Environmental Indicators of Dryland
Desertification in arid and semi-arid ecosystems is an unsolved environmental problem affecting 1.5 billion people and 25 % of drylands worldwide. Due to various definitions of desertification there
Spatial heterogeneity of the root system of grasses in the Patagonian arid steppe
It is proposed that lack of full colonization of low density root pockets by established root systems is determined by morphological constraints that limit their size and geometry, and potentiality seems to exist for the establishment of new individuals that would contribute to the formation of a continuous layer of uniform root density in the upper soil.
The objective of this paper was to assess the pattern and dynamics of Bromus pictus seed availability in this community, which represent the other portion of the recruitment equation, and to estimate the spatial pattern of recruitment.
Effect of fire on grasses in central semi-arid Argentina
Study of the effects of different fire intensities and season of burning on six important grass species in the Caldenal found that Stipa gynerioides and S. speciosa, two grasses not readily consumed by cattle, were sensitive to fire severity.