Grassland Phenology Response to Climate Conditions in Biobio, Chile from 2001 to 2020

Marcelo Alejandro Doussoulin-Guzmán, Fernando Juan Pérez-Porras, Paula Triviño-Tarradas, Andrés Felipe Ríos-Mesa, Alfonso García Ferrer Porras, Francisco Javier Mesas-Carrascosa

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    13 Citas (Scopus)

    Resumen

    Plant phenology is affected by climate conditions and therefore provides a sensitive indicator to changes in climate. Studying the evolution and change in plant phenology aids in a better understanding of and predicting changes in ecosystems. Vegetation Indices (VIs) have been recognized for their utility in indicating vegetation activity. Understanding climatic variables and their relationship to VI support the knowledge base of how ecosystems are changing under a new climatic scenario. This study evaluates grassland growth phenology in the Biobio, Chile, biweekly with Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation Index (NDVI) time series. Four growth parameters for the six agro-climatic regions were analyzed from 2001 to 2020: start and end of the season, time and value of maximum NDVI. For this purpose, the NDVI time series were smoothed using Savitzky–Golay filtering. In addition, by using monthly gridded database climate data, we studied correlations between phenology markers and rainfall, maximum temperature and minimum temperature. The results show that both the start and end of the growing season did not significantly change; however, all agro-climatic regions grow faster and more vigorously. Thus, climatic conditions in Biobio have become more conducive to grassland growth over the 2001–2020 period.

    Idioma originalInglés
    Número de artículo475
    PublicaciónRemote Sensing
    Volumen14
    N.º3
    DOI
    EstadoPublicada - 1 feb. 2022

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    • Artículos de investigación con calidad A1 / Q1

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