Dynamic Analysis of <i>Spartina alterniflora</i> in Yellow River Delta Based on U-Net Model and Zhuhai-1 Satellite
Coastal wetlands are critical for global biodiversity and ecological stability, yet the invasive <i>Spartina alterniflora</i> (<i>S. alterniflora</i>) poses severe threats to these ecosystems. This study evaluates the effectiveness of management efforts targeting <i>S....
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MDPI AG
2025-01-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/17/2/226 |
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| author | Huiying Li Guoli Cui Haojie Liu Qi Wang Sheng Zhao Xiao Huang Rong Zhang Mingming Jia Dehua Mao Hao Yu Zongming Wang Zhiyong Lv |
| author_facet | Huiying Li Guoli Cui Haojie Liu Qi Wang Sheng Zhao Xiao Huang Rong Zhang Mingming Jia Dehua Mao Hao Yu Zongming Wang Zhiyong Lv |
| author_sort | Huiying Li |
| collection | DOAJ |
| description | Coastal wetlands are critical for global biodiversity and ecological stability, yet the invasive <i>Spartina alterniflora</i> (<i>S. alterniflora</i>) poses severe threats to these ecosystems. This study evaluates the effectiveness of management efforts targeting <i>S. alterniflora</i> in the Yellow River Delta (YRD) using Zhuhai-1 hyperspectral imagery and the U-Net method. The U-Net model, coupled with the Relief-F algorithm, achieved a superior extraction accuracy (Kappa > 0.9 and overall accuracy of 93%) compared to traditional machine learning methods. From 2019 to 2021, <i>S. alterniflora</i> expanded rapidly, increasing from 4055.06 hm<sup>2</sup> to 6105.50 hm<sup>2</sup>, primarily in tidal flats and water bodies. A clearing project reduced its extent to 5063.62 hm<sup>2</sup> by 2022, and by 2023, only 0.55 hm<sup>2</sup> remained. These results underscore the effectiveness of Shandong’s management policies but highlight the risk of regrowth due to the species’ resilience. Continuous monitoring and maintenance are essential to prevent its resurgence and ensure wetland restoration. This study offers critical insights into dynamic vegetation monitoring and informs conservation strategies for wetland health. |
| format | Article |
| id | doaj-art-9a8df60359d3475caf2dbf944037d55a |
| institution | Kabale University |
| issn | 2072-4292 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj-art-9a8df60359d3475caf2dbf944037d55a2025-01-24T13:47:47ZengMDPI AGRemote Sensing2072-42922025-01-0117222610.3390/rs17020226Dynamic Analysis of <i>Spartina alterniflora</i> in Yellow River Delta Based on U-Net Model and Zhuhai-1 SatelliteHuiying Li0Guoli Cui1Haojie Liu2Qi Wang3Sheng Zhao4Xiao Huang5Rong Zhang6Mingming Jia7Dehua Mao8Hao Yu9Zongming Wang10Zhiyong Lv11School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, ChinaSchool of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, ChinaDepartment of Environmental Sciences, Emory University, Atlanta, GA 30322, USAState Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, ChinaState Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, ChinaState Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, ChinaModern Industry College, Jilin Jianzhu University, Changchun 130118, ChinaState Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, ChinaSchool of Computer Science and Engineering, Xi’an University of Technology, Xi’an 710054, ChinaCoastal wetlands are critical for global biodiversity and ecological stability, yet the invasive <i>Spartina alterniflora</i> (<i>S. alterniflora</i>) poses severe threats to these ecosystems. This study evaluates the effectiveness of management efforts targeting <i>S. alterniflora</i> in the Yellow River Delta (YRD) using Zhuhai-1 hyperspectral imagery and the U-Net method. The U-Net model, coupled with the Relief-F algorithm, achieved a superior extraction accuracy (Kappa > 0.9 and overall accuracy of 93%) compared to traditional machine learning methods. From 2019 to 2021, <i>S. alterniflora</i> expanded rapidly, increasing from 4055.06 hm<sup>2</sup> to 6105.50 hm<sup>2</sup>, primarily in tidal flats and water bodies. A clearing project reduced its extent to 5063.62 hm<sup>2</sup> by 2022, and by 2023, only 0.55 hm<sup>2</sup> remained. These results underscore the effectiveness of Shandong’s management policies but highlight the risk of regrowth due to the species’ resilience. Continuous monitoring and maintenance are essential to prevent its resurgence and ensure wetland restoration. This study offers critical insights into dynamic vegetation monitoring and informs conservation strategies for wetland health.https://www.mdpi.com/2072-4292/17/2/226<i>S. alterniflora</i>Zhuhai-1 hyperspectral imageryU-NetRelief-F |
| spellingShingle | Huiying Li Guoli Cui Haojie Liu Qi Wang Sheng Zhao Xiao Huang Rong Zhang Mingming Jia Dehua Mao Hao Yu Zongming Wang Zhiyong Lv Dynamic Analysis of <i>Spartina alterniflora</i> in Yellow River Delta Based on U-Net Model and Zhuhai-1 Satellite Remote Sensing <i>S. alterniflora</i> Zhuhai-1 hyperspectral imagery U-Net Relief-F |
| title | Dynamic Analysis of <i>Spartina alterniflora</i> in Yellow River Delta Based on U-Net Model and Zhuhai-1 Satellite |
| title_full | Dynamic Analysis of <i>Spartina alterniflora</i> in Yellow River Delta Based on U-Net Model and Zhuhai-1 Satellite |
| title_fullStr | Dynamic Analysis of <i>Spartina alterniflora</i> in Yellow River Delta Based on U-Net Model and Zhuhai-1 Satellite |
| title_full_unstemmed | Dynamic Analysis of <i>Spartina alterniflora</i> in Yellow River Delta Based on U-Net Model and Zhuhai-1 Satellite |
| title_short | Dynamic Analysis of <i>Spartina alterniflora</i> in Yellow River Delta Based on U-Net Model and Zhuhai-1 Satellite |
| title_sort | dynamic analysis of i spartina alterniflora i in yellow river delta based on u net model and zhuhai 1 satellite |
| topic | <i>S. alterniflora</i> Zhuhai-1 hyperspectral imagery U-Net Relief-F |
| url | https://www.mdpi.com/2072-4292/17/2/226 |
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