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dc.contributor.author
Easdale, Marcos Horacio
dc.contributor.author
Bruzzone, Octavio Augusto
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Mapfumo, Paul
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Tittonell, Pablo
dc.date.available
2021-02-17T17:17:39Z
dc.date.issued
2018-03
dc.identifier.citation
Easdale, Marcos Horacio; Bruzzone, Octavio Augusto; Mapfumo, Paul; Tittonell, Pablo; Phases or regimes? Revisiting NDVI trends as proxies for land degradation; John Wiley & Sons Ltd; Land Degradation & Development; 29; 3; 3-2018; 433-445
dc.identifier.issn
1099-145X
dc.identifier.uri
http://hdl.handle.net/11336/125833
dc.description.abstract
One of the main challenges in land degradation assessment is that a rigorous and systematic approach to addressing its complex dynamics is still missing. The development and application of operative tools at regional and global scales remain a challenge. Land degradation is usually defined as a long-term decline in ecosystem function and productivity. Due to its temporal and spatial resolution as well as data availability, the use of time series of spectral vegetation indexes obtained from satellite sensors has become frequent in recent studies in this field. Slope of linear trends of the normalized difference vegetation index is usually considered an accurate indicator and is widely used as a proxy for land degradation. Yet this method is built on a number of simplifying conceptual and methodological assumptions that prevent capturing more complex dynamics, such as cyclic or periodic behaviors. Our aim was to examine the limitations associated with using linear normalized difference vegetation index trends as proxies for land degradation by comparing outcomes with an alternative methodological procedure based on wavelet autoregressive methods. We explored these issues in 5 case studies from Africa and South America. We observed that trend explained a marginal portion of total temporal variability, whereas monotonic functions, such as linear trends, were unable to capture dynamics that were non-unidirectional, resulting in misinterpretation of actual trends. Wavelet autoregressive method results were encouraging as a step towards the application of more accurate methods to provide sound scientific information of land degradation and restoration.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons Ltd
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
DESERTIFICATION
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MODIS
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TIME SERIES ANALYSIS
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VARIABILITY
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WAVELETS
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Otras Ciencias Agrícolas
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Otras Ciencias Agrícolas
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CIENCIAS AGRÍCOLAS
dc.title
Phases or regimes? Revisiting NDVI trends as proxies for land degradation
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-02-09T18:44:07Z
dc.identifier.eissn
1085-3278
dc.journal.volume
29
dc.journal.number
3
dc.journal.pagination
433-445
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Easdale, Marcos Horacio. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Patagonia Norte. Estación Experimental Agropecuaria San Carlos de Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
dc.description.fil
Fil: Bruzzone, Octavio Augusto. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Patagonia Norte. Estación Experimental Agropecuaria San Carlos de Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
dc.description.fil
Fil: Mapfumo, Paul. Universidad de Zimbabue; Zimbabue
dc.description.fil
Fil: Tittonell, Pablo. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Patagonia Norte. Estación Experimental Agropecuaria San Carlos de Bariloche; Argentina. University of Agriculture Wageningen; Países Bajos
dc.journal.title
Land Degradation & Development
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1002/ldr.2871
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1002/ldr.2871
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