Arquetipos Funcionales de Pastizal: Recuperando el eslabón perdido de la evaluación de pastizales en la Patagonia.

Rangeland assessment in the arid and semi-arid regions of Patagonia, Argentina, is a key tool both in livestock management and in environmental evaluations and monitoring of complex processes such as desertification and the impact of climate change. Although most rangeland assessment methods have assigned efforts to data resolution (field assessment plots) or information extension (landscape-scale classifications using remote sensing), the temporal variation of the vegetation has received less attention. It can be argued that the reasons for this deficit respond to the cost of carrying out field evaluations over time and/or to the short series of satellite data available until a couple of decades ago. However, a current advantage is that there are already more than 20 years of satellite data series, which opens up new possibilities to guide greater efforts in the study of the dynamics, that is, the temporal and spatiotemporal variability of the vegetation productivity. Our objective was to evaluate the application of a vegetation functional classification method, analyzing the complementation of information between structural and functional aspects of rangelands at a farm scale. In particular, we compared the results obtained by a classification of landscape units and physiognomy of vegetation and the results of a classification with a characterization of the dynamics of the vegetation productivity from the protocol that we have called Rangeland Functional Archetypes. The results emphasize the need to incorporate the dynamics of vegetation productivity as a classifying factor and not as a dependent variable of a previously defined structural classification. We discuss the potential and future steps to move forward in the integration of both approaches at the farm scale in the livestock systems of Patagonia, as a tool for a complementary structural and functional assessment of rangelands, oriented towards planning and adaptive management. [ABSTRACT FROM AUTHOR]