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| Synergistic evolution of soil and vegetation in different years of reclamation area on Hengsha Island |
| Received:June 10, 2025 |
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| KeyWord:tidal flat reclamation;soil physicochemical properties;vegetation coverage;ecological restoration |
| Author Name | Affiliation | E-mail | | LIU Dong | Institute of Ecological and Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
College of Ecological Technique and Engineering, Shanghai Institute of Technology, Shanghai 201418, China | | | ZHENG Xianqing | Institute of Ecological and Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Key Laboratory of Facility Horticulture Technology, Shanghai 201403, China
Shanghai Agricultural Environmental Protection Monitoring Station, Shanghai 201403, China | | | YANG Xiaolei | Shanghai Agricultural Technology Extension Service Center, Shanghai 201105, China | | | SONG Ke | Institute of Ecological and Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Agricultural Environment and Cultivated Land Conservation Scientific Observation and Experiment Station, Ministry of Agriculture and Rural Affairs, Shanghai 201403, China
Shanghai Low Carbon Agricultural Engineering Technology Research Center, Shanghai 201403, China | | | LÜ Weiguang | Institute of Ecological and Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Key Laboratory of Facility Horticulture Technology, Shanghai 201403, China
Shanghai Agricultural Environmental Protection Monitoring Station, Shanghai 201403, China | | | LIU Bin | Qingpu District Agro-Technology Extension Service Center, Shanghai 201799, China | | | LI Fayun | College of Ecological Technique and Engineering, Shanghai Institute of Technology, Shanghai 201418, China | | | ZHANG Yue | Institute of Ecological and Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Key Laboratory of Facility Horticulture Technology, Shanghai 201403, China
Shanghai Agricultural Environmental Protection Monitoring Station, Shanghai 201403, China | zhangyuelsz@163.com | | LI Xiaoxiao | Institute of Ecological and Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Key Laboratory of Facility Horticulture Technology, Shanghai 201403, China
Shanghai Agricultural Environmental Protection Monitoring Station, Shanghai 201403, China | lixiaoxiao@saas.sh.cn |
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| Abstract: |
| This study focused on the Pudong reclamation area of Hengsha Island in the Yangtze Estuary, aiming to the spatiotemporal evolution laws and interaction mechanisms of soil physicochemical properties and vegetation coverage under different reclamation ages, and to reveal the ecological succession process of coastal reclamation areas providing a scientific basis for ecological restoration and land management. The study investigated four representative areas with distinct reclamation histories: newly reclaimed(Y3, 3 years), shortmedium term restored(Y7, 7 years), medium term restored(Y10, 10 years), and long-term restored(Y15, 15 years). Soil physicochemical parameters(including pH, electrical conductivity, total salinity, total nitrogen, total phosphorus, total potasium)were analyzed. Vegetation indices were derived from Landsat/Sentinel imagery, with NDVI calculated and FVC estimated using the pixel dichotomy model. Correlation analysis, Mantel test and stepwise regression method were used to analyze the driving effect of soil on vegetation. The results showed that: the soil properties showed significant temporal sequence changes: with the increase of the reclamation age, pH, electrical conductivity and total salinity content decreased continuously(P<0.05), while the content of total nitrogen, total phosphorus and total potassium increased significantly(P<0.001). Vegetation coverage showed gradual increase: the NDVI increased from reclamation for Y3(0.12 ± 0.05)to reclamation for Y15(0.35±0.09), and the FVC increased synchronously, the vegetation community successioned from salt-tolerant pioneer species to high coverage community. Soil-vegetation coupling analysis showed that organic matter, total nitrogen, and total phosphorus were significantly positively correlated with the NDVI(P<0.01), while pH, electrical conductivity, and total salinity were negatively correlated. Stepwise regression showed that pH, total nitrogen, and organic matter were the dominant factors of the NDVI(R2=0.787). The soil properties of Hengsha Island beach reclamation area gradually improved with the increase of the reclamation age, promoted the restoration of vegetation, among which the accumulation of organic matter and total nitrogen and the decrease of pH were the key driving factors. |
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