Susceptibility Mapping of Unhealthy Trees in Jiuzhaigou Valley Biosphere Reserve

Jiuzhaigou Valley is recognized as both a world natural heritage site and a biosphere reserve. Conducting research on vegetation health within its scope can provide a demonstration role for sustainable development research. In this study, we proposed a technology integration approach that combined r...

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Published inRemote sensing (Basel, Switzerland) Vol. 15; no. 23; p. 5516
Main Authors Gao, Sheng, Chen, Fulong, Wang, Qin, Shi, Pilong, Zhou, Wei, Zhu, Meng
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.12.2023
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Abstract Jiuzhaigou Valley is recognized as both a world natural heritage site and a biosphere reserve. Conducting research on vegetation health within its scope can provide a demonstration role for sustainable development research. In this study, we proposed a technology integration approach that combined remote sensing intelligent identification and quantitative retrieval, and achieved vegetation health monitoring and susceptibility mapping of unhealthy trees. Leveraging WorldView-2 high-resolution satellite images, unhealthy trees were elaborately identified through the object-oriented classification method employing spectral and texture features, with F1 Score exceeding 75%. By applying fuzzy operations on indices related to leaf pigment and canopy architecture, we ultimately generated susceptibility maps of unhealthy trees on Sentinel-2 satellite images, with Area Under the Curve (AUC) exceeding 0.85. Our findings underscore that the vegetation health in Jiuzhaigou Valley is predominantly influenced by human activities and geological hazards. The forests of Jiuzhaigou Valley exhibit a certain degree of resilience to geological disasters, while human activities have been continuously exerting adverse effects on forest health in recent years, necessitating heightened attention. The methodology proposed in this study for mapping unhealthy trees susceptibility presents a cost-effective solution that can be readily applied for vegetation health monitoring and early warning in analogous biosphere reserves.
AbstractList Jiuzhaigou Valley is recognized as both a world natural heritage site and a biosphere reserve. Conducting research on vegetation health within its scope can provide a demonstration role for sustainable development research. In this study, we proposed a technology integration approach that combined remote sensing intelligent identification and quantitative retrieval, and achieved vegetation health monitoring and susceptibility mapping of unhealthy trees. Leveraging WorldView-2 high-resolution satellite images, unhealthy trees were elaborately identified through the object-oriented classification method employing spectral and texture features, with F1 Score exceeding 75%. By applying fuzzy operations on indices related to leaf pigment and canopy architecture, we ultimately generated susceptibility maps of unhealthy trees on Sentinel-2 satellite images, with Area Under the Curve (AUC) exceeding 0.85. Our findings underscore that the vegetation health in Jiuzhaigou Valley is predominantly influenced by human activities and geological hazards. The forests of Jiuzhaigou Valley exhibit a certain degree of resilience to geological disasters, while human activities have been continuously exerting adverse effects on forest health in recent years, necessitating heightened attention. The methodology proposed in this study for mapping unhealthy trees susceptibility presents a cost-effective solution that can be readily applied for vegetation health monitoring and early warning in analogous biosphere reserves.
Audience Academic
Author Zhu, Meng
Shi, Pilong
Zhou, Wei
Gao, Sheng
Chen, Fulong
Wang, Qin
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Snippet Jiuzhaigou Valley is recognized as both a world natural heritage site and a biosphere reserve. Conducting research on vegetation health within its scope can...
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SubjectTerms Algorithms
Biosphere
Biosphere reserves
Carbon
Disease
fuzzy operations
Geological hazards
Geology
Health aspects
Historic sites
Image resolution
Jiuzhaigou Valley
Landslides & mudslides
Mapping
Remote sensing
Satellite imagery
Sentinel-2
Support vector machines
Susceptibility
Sustainable development
Trees
Trends
Unmanned aerial vehicles
Valleys
Vegetation
vegetation health
WorldView-2
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Title Susceptibility Mapping of Unhealthy Trees in Jiuzhaigou Valley Biosphere Reserve
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