Using the NDVI to analyze trends and stability of grassland vegetation cover in Inner Mongolia
- 207 Downloads
Grassland plays an important role in preventing desertification and conserving soil and water in arid and semi-arid regions. Grasslands are very sensitive to, and have been affected by, climate change over the past three decades. To gain an improved insight into the dynamics and stability of grassland vegetation, we evaluated trends in the vegetation cover in the Inner Mongolia grassland and its response to climate change using the normalized difference vegetation index (NDVI) datasets from 1982 to 2013. We used resilience (E) which is the sensitivity of vegetation cover to climate change relative to their mean values and the coefficient of variation (CV) to represent the stability of the grassland vegetation cover. The results indicated that changes in the growing season NDVI were not significant with the value of 0.00033/year (p = 0.24) from 1982 to 2013. Using the CV to represent stability showed that the NDVI, with a CV of about 6.0, was more stable than precipitation and temperature, which had CV values of about 20.0 and 10.0, respectively. Using E as an index of the relationships between NDVI and climate variables showed that the NDVI was insensitive to both precipitation (E = 0.15) and temperature (E = 0.10) but sensitive to sunshine duration with the CV values of about 5.0. The higher E values for the different grassland types in summer might reflect climate change characterized by warming and decreases in precipitation. In summary, the grassland vegetation cover in Inner Mongolia was very stable over the period from 1982 to 2013. This study has crucial significance for future predictions of the influence of climate change on grassland and the results should be used to support the development of improved management strategies.
All authors contributed significantly to this manuscript. To be specific, Dongsheng Zhao and Qing Lu conceived the research and were responsible for the data processing and paper writing. Shaohong Wu, Erfu Dai, and Jiangbo Gao made very valuable suggestions for this paper. All authors reviewed and accepted the manuscript.
This work was supported by the National Nature Science Foundation of China (Grant No. 41530749, Grant No. 41571193), the Doctoral Scientific Research Foundation of East China University of Technology (Grant No. DHBK2017150), the Scientific Research Fund of Jiangxi Provincial Education Department (Grant No. GJJ170448), and the Research Center of Resource and Environment Strategies, East China University of Technology (Grant No. 17GL02).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Cleland EE (2011) Biodiversity and ecosystem stability. Nat Educ Knowl 3:14Google Scholar
- Cramer W, Bondeau A, Woodward FI, Prentice IC, Betts RA, Brovkin V, Cox PM, Fisher V, Foley JA, Friend AD (2001) Global response of terrestrial ecosystem structure and function to CO2 and climate change: results from six dynamic global vegetation models. Glob Chang Biol 7:357–373CrossRefGoogle Scholar
- de Mazancourt C, Isbell F, Larocque A, Berendse F, De Luca E, Grace JB, Haegeman B, Wayne Polley H, Roscher C, Schmid B, Tilman D, van Ruijven J, Weigelt A, Wilsey BJ, Loreau M (2013) Predicting ecosystem stability from community composition and biodiversity. Ecol Lett 16:617–625CrossRefGoogle Scholar
- Editorial Board of Rangeland Resources of China (1996) Rangeland resources of China. Science Press, Beijing (in Chinese)Google Scholar
- Editorial Board of Vegetation Map of China (2001) Vegetation atlas of China. Science Press, Beijing (in Chinese)Google Scholar
- IPCC (2013) Climate change 2013: the physical science basis: contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, CambridgeGoogle Scholar
- Piao SL, Nan HJ, Huntingford C, Ciais P, Friedlingstein P, Sitch S, Peng SS, Ahlstrom A, Canadell JG, Cong N, Levis S, Levy PE, Liu LL, Lomas MR, Mao JF, Myneni RB, Peylin P, Poulter B, Shi XY, Yin GD, Viovy N, Wang T, Wang XH, Zaehle S, Zeng N, Zeng ZZ, Chen AP (2014) Evidence for a weakening relationship between interannual temperature variability and northern vegetation activity. Nat Commun 5:1–7CrossRefGoogle Scholar
- Tong XW, Wang KL, Brandt M, Yue YM, Liao CJ, Fensholt R (2016) Assessing future vegetation trends and restoration prospects in the karst regions of Southwest China. Remote Sens 8:1–17Google Scholar
- Xie GD, Zhang YL, Lu CX, Zheng D, Cheng SK (2000) Study on valuation of rangeland ecosystem services of China. J Nat Resour 16:47–53 (in Chinese)Google Scholar