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Cropland fragmentation change across China over the last two decades

文献类型：期刊论文

作者Zhao, Na3,4,5; Chen, Kainan2,4,5; Wu, Xiaoran4,5; Zhang, Lili1; Wang, Wei5
刊名AGRICULTURAL SYSTEMS
出版日期2024-06-01
卷号218页码:104010
关键词Land use Spatial-temporal variation Cropland Fragmentation China
DOI10.1016/j.agsy.2024.104010
产权排序1
文献子类Article
英文摘要CONTEXT: There is an urgent need for a comprehensive assessment of cropland fragmentation that can provide valuable insights for guiding policies related to cropland protection, restoration, and other relevant measures. Despite the growing number of studies focusing on cropland fragmentation, a nationwide, long-term, and fine-scale understanding of the spatiotemporal changes in cropland fragmentation across China remains lacking. OBJECTIVE: This study aimed to construct a novel comprehensive index that quantitatively assesses the level of farmland fragmentation, to fully elucidate the spatial and temporal dynamics of farmland fragmentation in China at the county level over the last two decades, and to identify the relationships between farmland fragmentation and key factors from anthropogenic and natural perspectives. METHODS: Utilizing the 30 m annual and continuous time series Landsat-derived annual China land cover dataset (CLCD) from 2000 to 2021, we integrated three landscape pattern metrics- patch density (PD), mean patch area (MPA), and edge density (ED)- to devise a new comprehensive cropland fragmentation index (CFI). We also developed a Beta regression method to identify the relationships between CFI and key factors from human and natural perspectives. RESULTS AND CONCLUSIONS: The results show that counties with high cropland fragmentation (CFI > 0.8) are predominantly located in the central part of China and the coastal areas, and the counties with low cropland fragmentation (CFI < 0.2) are mainly in the North China Plain, the Northeast Plain, and some areas in the northwest. Among counties experiencing an increase or decrease in fragmentation, the primary types of cropland conversions are between cropland and grassland, as well as between cropland and forests. A third major type of conversion involves the transformation of cropland into impervious surfaces. CFI had a significantly negative linear relationship with total area of cropland in each county while showing a positive relationship with the total cropland patches in each county. The variables CFI and slope, and CFI and nighttime light (NTL) data, exhibited a quadratic parabolic relationship. SIGNIFICANCE: The findings presented in this study provide crucial insights into the underlying causes and patterns of farmland fragmentation in China. These insights will serve as a valuable resource for policymakers and land managers, enabling them to devise effective strategies for sustainable land use planning and promoting rural development in the country.
WOS关键词LAND-USE CHANGE ; FOOD SECURITY ; URBAN EXPANSION ; BETA REGRESSION ; COUNTY LEVEL ; URBANIZATION ; OWNERSHIP ; MECHANISM ; EVOLUTION ; PATTERNS
WOS研究方向Agriculture
WOS记录号WOS:001248421000001
出版者ELSEVIER SCI LTD
源URL[http://ir.igsnrr.ac.cn/handle/311030/205323]  
专题资源与环境信息系统国家重点实验室_外文论文
通讯作者Wang, Wei
作者单位1.Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100094, Peoples R China
2.Minist Nat Resources Peoples Republ China, Inst Oceanog 1, Qingdao 266061, Peoples R China
3.Jiangsu Ctr Collaborat Innovat Geog Informat Resou, Nanjing 210023, Peoples R China
4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
5.Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Na,Chen, Kainan,Wu, Xiaoran,et al. Cropland fragmentation change across China over the last two decades[J]. AGRICULTURAL SYSTEMS,2024,218:104010.
APA Zhao, Na,Chen, Kainan,Wu, Xiaoran,Zhang, Lili,&Wang, Wei.(2024).Cropland fragmentation change across China over the last two decades.AGRICULTURAL SYSTEMS,218,104010.
MLA Zhao, Na,et al."Cropland fragmentation change across China over the last two decades".AGRICULTURAL SYSTEMS 218(2024):104010.

入库方式： OAI收割

来源：地理科学与资源研究所

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