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Assessment of Vegetation Dynamics and Ecosystem Resilience in the Context of Climate Change and Drought in the Horn of Africa
Measho, Simon1,2,3; Chen, Baozhang1,2,4,5; Pellikka, Petri6,7; Guo, Lifeng1,2; Zhang, Huifang1,2; Cai, Diwen8; Sun, Shaobo9; Kayiranga, Alphonse1,2; Sun, Xiaohong10; Ge, Mengyu4
2021-05-01
Source PublicationREMOTE SENSING
Volume13Issue:9Pages:20
Corresponding AuthorChen, Baozhang(baozhang.chen@igsnrr.ac.cn)
AbstractUnderstanding the response of vegetation and ecosystem resilience to climate variability and drought conditions is essential for ecosystem planning and management. In this study, we assessed the vegetation changes and ecosystem resilience in the Horn of Africa (HOA) since 2000 and detected their drivers based mainly on analysis of the Moderate Resolution Imaging Spectroradiometer (MODIS) products. We found that the annual and seasonal trends of NDVI (Normalized Difference Vegetation Index) generally increased during the last two decades over the Horn of Africa particularly in western parts of Ethiopia and Kenya. The weakest annual and seasonal NDVI trends were observed over the grassland cover and tropical arid agroecological zones. The NDVI variation negatively correlated with Land Surface Temperature (LST) and positively correlated with precipitation at a significant level (p < 0.05) account for 683,197 km(2) and 533,385 km(2) area, respectively. The ecosystem Water Use Efficiency (eWUE) showed overall increasing trends with larger values for the grassland biome. The precipitation had the most significant effect on eWUE variation compared to LST and annual SPEI (Standardized Evapotranspiration Index). There were about 54.9% of HOA resilient to drought disturbance, whereas 32.6% was completely not-resilient. The ecosystems in the humid agroecological zones, the cropland, and wetland were slightly not-resilient to severe drought conditions in the region. This study provides useful information for policy makers regarding ecosystem and dryland management in the context of climate change at both national and regional levels.
Keywordvegetation dynamics ecosystem resilience MODIS NDVI water use efficiency climate change climate variability drought precipitation LST SPEI
DOI10.3390/rs13091668
WOS KeywordWATER-USE EFFICIENCY ; HYDROCLIMATIC DISTURBANCES ; GREATER HORN ; COVER CHANGE ; RAINFALL ; TRENDS ; IMPACT ; TEMPERATURE ; FUTURE ; SAHEL
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2018YFA0606001] ; National Key R&D Program of China[2017YFA0604301] ; National Key R&D Program of China[2017YFA0604302] ; National Natural Science Foundation of China[41771114] ; National Natural Science Foundation of China[41977404] ; State Key Laboratory of Resources and Environment Information System[O88RA901YA] ; Chinese Government Scholarship
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; State Key Laboratory of Resources and Environment Information System ; Chinese Government Scholarship
WOS Research AreaEnvironmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS IDWOS:000655465900001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/162799
Collection中国科学院地理科学与资源研究所
Corresponding AuthorChen, Baozhang
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, 11A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Hamelmalo Agr Coll, Dept Land Resources & Environm, Keren 397, Eritrea
4.Nanjing Univ Informat Sci & Technol, Sch Remote Sensing & Geomat Engn, Nanjing 210044, Peoples R China
5.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Peoples R China
6.Univ Helsinki, Dept Geosci & Geog, Earth Change Observat Lab, Helsinki 00100, Finland
7.Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Peoples R China
8.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
9.Tianjin Univ, Inst Surface Earth Syst Sci, Sch Earth Syst Sci, Tianjin 300072, Peoples R China
10.Peking Univ, Coll Environm Sci & Engn, Key Lab Water & Sediment Sci, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Measho, Simon,Chen, Baozhang,Pellikka, Petri,et al. Assessment of Vegetation Dynamics and Ecosystem Resilience in the Context of Climate Change and Drought in the Horn of Africa[J]. REMOTE SENSING,2021,13(9):20.
APA Measho, Simon.,Chen, Baozhang.,Pellikka, Petri.,Guo, Lifeng.,Zhang, Huifang.,...&Ge, Mengyu.(2021).Assessment of Vegetation Dynamics and Ecosystem Resilience in the Context of Climate Change and Drought in the Horn of Africa.REMOTE SENSING,13(9),20.
MLA Measho, Simon,et al."Assessment of Vegetation Dynamics and Ecosystem Resilience in the Context of Climate Change and Drought in the Horn of Africa".REMOTE SENSING 13.9(2021):20.
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