Abstract
Background: Desertification is one of the main obstacles to global sustainable development. Monitoring, evaluating and mastering its driving factors are very important for the prevention and control of desertification. As one of the largest deserts in China, the development of desertification in Otindag Sandy Land (OSL) resulted in the reduction in land productivity and serious ecological/environmental consequences. Although many ecological restoration projects have been carried out, the vegetation restoration of OSL and the impact mechanism of climate and human activities on desertification remain unclear. Methods: Taking OSL as the research area, this paper constructs the desertification index by using the remote sensing images and meteorological and socio-economic data, between 1986 and 2016, and analyzes the spatio-temporal evolution process and driving factors of desertification by using trend analysis and spearman rank correlation. Results: The results showed that: (1) Desertification in the OSL has fluctuated greatly during the past 30 years. Desertification recovered between 1986 and 1990, expanded and increased between 1990 and 2000, reduced between 2000 and 2004, developed rapidly between 2004 and 2007, and recovered again between 2007 and 2016; (2) The desertification of OSL is dominated by a non-significant change trend, accounting for 73.27%. In the significant change trend, the area of desertification rising trend is 20.32%, which is mainly located in the north and east, and the area of declining trend is 6.41%, which is mainly located in the southwest; (3) Desertification is the result of the superposition of climate and human activities. Climate change is the main influencing factor, followed by human activities, and the superposition effects of the two are spatio-temporal differences. Conclusions: These results shed light on the development of desertification in OSL and the relative importance and complex interrelationship between human activities and climate in regulating the process of desertification. Based on this, we suggest continuing to implement the ecological restoration policy and avoid the destruction of vegetation by large-scale animal husbandry in order to improve the situation of desertification.
Funder
Shanghai Sailing Program
National Key R&D Program
Youth initiation project of Shanghai Academy of landscape planning
Special Project of Shanghai Municipal Economy and Information Technology Commission
Key science and technology project of Inner Mongolia Autonomous Region “Screening of resistant tree species in desertified land
Subject
General Earth and Planetary Sciences
Reference73 articles.
1. United Nations Convention to Combat Desertification (1994). Intergovernmental Negotiating Committee for a Convention to Combat Desertification, Elaboration of an International Convention to Combat Desertification in Countries Experiencing Serious Drought and/or Desertification, Particularly in Africa, United Nations. U.N. Doc. A/AC.241/27, 33 L.L.M.
2. United Nations Convention to Combat Desertification (2022, March 07). Conference of the Parties: Thirteenth Session Ordos, China, 6–16 September 2017. Available online: http://www2.unccd.int/sites/default/files/inline-files/Ordos%20declaration.pdf.
3. Can environmental regulation promote the coordinated development of economy and environment in China’s manufacturing industry?;Yuan;A panel data analysis of 28 sub-sectors. J. Clean. Prod.,2017
4. Land degradation neutrality: The science-policy interface from the UNCCD to national implementation;Chasek;Environ. Sci. Policy,2019
5. Assessment of desertification using modified MEDALUS model in the north Nile Delta, Egypt;Abuzaid;Geoderma,2022
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献