La variación temporal del índice NDVI predice los cambios temporales de la cobertura vegetal en las tierras secas de la Patagonia argentina
- Juan Gaitan
- Nicolás Ciano
- Gabriel Oliva
- Donaldo Bran
- Lucas Butti
- German Cariac
- Cecilia Caruso
- Walter Opazo
- Daniela Ferrante
- Daniela Echevarria
- Gustavo Buono
- Anabella Fantozzi
- Emilio Guirado
- Fernando Maestre
ISSN: 1697-2473
Año de publicación: 2021
Título del ejemplar: Desertificación: nuevos enfoques para un viejo problema
Volumen: 30
Número: 3
Tipo: Artículo
Otras publicaciones en: Ecosistemas: Revista científica y técnica de ecología y medio ambiente
Resumen
Temporal variations on NDVI predict temporal changes in vegetation cover across Patagonian drylands (Argentina). In drylands, natural vegetation is an important source of livelihood as they provide food, fuel and forage for livestock. In addition to the provision of goods and services, dryland vegetation also plays an important role in many ecological processes, such as recycling nutrients or protecting the soil from erosion. Long-term monitoring of vegetation cover is therefore key for decision-making and management of these regions. In this study, we analyze the variation of vegetation cover in 239 sites of a long-term monitoring network (MARAS network), in one of the largest dryland biomes in the world: the argentine patagonian steppe. Then we relate it to the variation of different periods of the Normalized Difference Vegetation Index (NDVI), obtained from the MODIS sensor, which serve as a predictor variable. The adjusted empirical model explained up to 40% of the variation in the vegetation cover measured in the field. With this simple empirical model we have estimated and mapped temporal changes in the vegetation cover of a large dryland biome at low cost.
Información de financiación
La red MARAS ha sido financiada por el proyecto GEF Patagonia PNUD ARG 07/G35 (2008–2014) “Sustainable Management of Arid and Semiarid systems for desertification control in Patagonia” Argentina. Financiamiento adicional fue aportado por el Proyecto INTA PNNAT-1128035 “Observatorios de Sustentabilidad Rural”, Fundación ArgenINTA (2015–2016), Ley 25.422 para la Recupera-ción de la Ganadería Ovina de Argentina (2017–2019) y el Proyecto INTA PE i040 “Monitoreo de la degradación de tierras (2020-2021). El trabajo de FTM está financiado por el European Research Council (ERC Grant agreement 647038 [BIODESERT]) y la Generalitat Valenciana (CIDEGENT/2018/041).Financiadores
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European Research Council
European Union
- 647038
-
Generalitat Valenciana
Spain
- CIDEGENT/2018/041