Assessment of forest dieback on the Moroccan Central Plateau using spectral vegetation indices

作     者：Youssef Dallahi Amal Boujraf Modeste Meliho Collins Ashianga Orlando Youssef Dallahi;Amal Boujraf;Modeste Meliho;Collins Ashianga Orlando

作者机构：Laboratory of Microbial BiotechnologiesAgrosciences and Environment(BioMAgE)Faculty of Sciences SemlaliaCadi Ayyad UniversityMarrakechMorocco Laboratoire des Productions VégétaleAnimales et Agro-industrieEquipe de BotaniqueBiotechnologie et Protection des PlantesFacultédes SciencesUniversitéIbn TofailKenitraMorocco SociétésTerritoiresHistoires et PatrimoinesFacultédes Lettres et des Sciences HumainesUniversitéMohammed VRabatMorocco RabatMorocco 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2023年第34卷第3期

页      面：793-808页

核心收录：

学科分类：090704[农学-森林经理学] 0907[农学-林学] 09[农学] 

基　　金：Direction Régionale des Eaux et Forêts de Rabat-Salé-Zemmour-Zair 

主　　题：Forest health monitoring Remote sensing Dieback Vegetation indices Sibara forest 

摘      要：Cork oak forests in Morocco are rich in resources and services thanks to their great biological diversity,playing an important ecological and socioeconomic *** degradation of the forests has been accentuated in recent years by signifi cant human pressure and eff ects of climate change;hence,the health of the stands needs to be *** this study,the Google Engine Earth platform was leveraged to extract the normalized diff erence vegetation index(NDVI)and soil-adjusted vegetation index,from Landsat 8 OLI/TIRS satellite images between 2015 and 2017 to assess the health of the Sibara Forest in *** results highlight the importance of interannual variations in NDVI in forest monitoring;the variations had a signifi cantly high relationship(p0.001)with dieback *** was positively and negatively correlated with mean annual precipitation and mean annual temperature with respective coeffi cients of 0.49 and−0.67,highlighting its ability to predict phenotypic changes in forest *** interannual variation in NDVI between 2016 and 2017 seemed to confi rm fi eld observations of cork oak dieback in 2018,with the largest decreases in NDVI(up to−38%)in December in the most-aff ected *** of the infl uence of ecological factors on dieback highlighted the role of substrate as a driver of dieback,with the most severely aff ected plots characterized by granite-granodiorite substrates.