NDLI: Climatic Regulation of Vegetation Phenology in Protected Areas along Western South America

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Climatic Regulation of Vegetation Phenology in Protected Areas along Western South America

Content Provider	MDPI
Author	Gonzalo, Saldías Richard, Muñoz Alexander, Galán Lara, Carlos Cazelles, Bernard Rivadeneira, Marcelo Paredes, Álvaro Fierro, Pablo Broitman, Bernardo
Copyright Year	2021
Abstract	Using 19 years of remotely sensed Enhanced Vegetation Index (EVI), we examined the effects of climatic variability on terrestrial vegetation of six protected areas along southwestern South America, from the semiarid edge of the Atacama desert to southern Patagonia ( $30^{°}$ S– $51^{°}$ S). The relationship between satellite phenology and climate indices, namely MEI (Multivariate ENSO Index), PDO (Pacific Decadal Oscillation) and SAM (Southern Annular Mode) were established using statistical analyses for non-stationary patterns. The annual mode of phenological activity fluctuated in strength through time from the semiarid region to the border of southern Patagonia. Concomitantly, enhanced synchrony between EVI and climatic oscillations appeared over interannual cycles. Cross correlations revealed that variability in MEI was the lead predictor of EVI fluctuations over scales shorter than 4 months at lower latitudes and for the most poleward study site. The PDO was correlated with EVI over lags longer than 4 months at low latitude sites, while the SAM showed relationships with EVI only for sites located around $40^{°}$ S. Our results indicate that the long-term phenological variability of the vegetation within protected areas along southwestern South America is controlled by processes linked to climate indices and that their influence varies latitudinally. Further studies over longer time scales will be needed to improve our understanding the impacts of climate change on vegetation condition and its effect over phenological variability.
Starting Page	2590
e-ISSN	20724292
DOI	10.3390/rs13132590
Journal	Remote Sensing
Issue Number	13
Volume Number	13
Language	English
Publisher	MDPI
Publisher Date	2021-07-02
Access Restriction	Open
Subject Keyword	Remote Sensing Climatic Change Vegetation Index Modis Phenology Long-term Variability
Content Type	Text
Resource Type	Article

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