Spatio-temporal characteristics and driving forces of landscape structure changes in the middle reach of the Heihe River Basin from 1990 to 2015
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The oasis, desert–oasis ecotone (DOE) and desert compose the typical landscape structures in arid regions. The detection of landscape structure changes and quantification of the driving forces are vital to sustainable ecosystem management. Previous studies did not integrate the three landscape types, especially considering the role of the DOE, to detect landscape changes.
(1) Detect the spatio-temporal dynamics of the landscape structure in the middle reach of the Heihe River Basin from 1990 to 2015. (2) Identify the key driving factors for landscape structure changes and quantify their contributions.
The decision tree classification algorithm was combined with visual interpretation to extract oasis, DOE and desert areas. Status and trend indicators, transition matrix and landscape metrics were used to characterize the landscape changes. Redundancy analysis and variation portioning analysis were integrated for quantification of driving forces.
Landscape change was characterized by oasis expansion (+ 37.21%) via a one-way transition with an unbalanced status. The contraction of DOE (− 12.73%) and desert (− 8.50%) areas mainly occurred on the periphery of the oasis. The landscape structure changes were mainly driven by the population, river flow and gross domestic product with unique contributions of 35.99, 9.01 and 7.68%, respectively, and a cumulative contribution of 96.64%.
The mutual transformations among landscapes showed distinct spatio-temporal variations. Human activities, especially demographic factors, drove the changes in landscape structure. The development of oasis areas should be controlled within a suitable scale, and the DOE should be protected to maintain the stability of ecosystems in arid regions.
KeywordsDesert–oasis ecotone Oasis expansion Landscape structure change Human activities Quantitative analysis Arid region
This research was financially supported by the National Key Research and Development Program of China (2017YFA0604703), the National Natural Science Foundation of China (41822103 and 91425301), the Chinese Academy of Sciences (QYZDY-SSW-DQC025) and the Youth Innovation Promotion Association CAS (2016040). The data used in this study, if not collected by the authors or acknowledged in the text, were provided by the Heihe Program Data Management Center (http://www.heihedata.org). We would like to thank the Linze Inland River Basin Research Station Experimental for field experiment support. We would to thank the editor and two anonymous reviewers for their constructive comments which improved the quality of this manuscript.
- Dittrich A, Buerkert A, Brinkmann K (2010) Assessment of land use and land cover changes during the last 50 years in oases and surrounding rangelands of Xinjiang, NW China. J Agric Rural Dev Trop Subtrop 111:129–142Google Scholar
- Forman RTT (1997) Land mosaics: the ecology of landscapes and regions. Cambridge University Press, CambridgeGoogle Scholar
- Hao X, Li W, Huang X, Zhu C, Ma J (2009) Assessment of the groundwater threshold of desert riparian forest vegetation along the middle and lower reaches of the Tarim River, China. Hydrol Process 24:178–186Google Scholar
- Lamqadem AA, Saber H, Rahimi A (2017) Spatiotemporal changes of vegetation in the middle Draa Valley Oasis: a study case of M’hamid El Ghizlane Oasis (Morocco). Eur Sci J 13(24):115–132Google Scholar
- Lepš J, Šmilauer P (2003) Multivariate analysis of ecological data using CANOCO. Cambridge University Press, CambridgeGoogle Scholar
- McGarigal K, Marks B (1995) FRAGSTATS: spatial pattern analysis program for quantifying landscape structure. USDA Forest Service General Technical Report PNW-351, pp 1–122Google Scholar
- Oksanen J, Blanchet FG, Friendly M, Kindt R, Legendre P, McGlinn D, Minchin PR, O’Hara RB, Simpson GL, Solymos P, Stevens MHH, Szoecs E, Wagner H (2017) vegan: community ecology package. https://CRAN.R-project.org/package=vegan. Accessed 6 Dec 2017
- Simmers I (2005) Hydrological processes and water resources management. In: Understanding water in a dry environment: IAH international contributions to hydrogeology, vol 23. CRC Press, Boca Raton, pp 1–14Google Scholar
- Steffen W, Sanderson A, Tyson PD, Jäger T, Matson PA, Moore III B, Oldfield F, Richardson K, Schellnhuber HJ, Turner II BL, Wasson RJ (2006) Global change and the earth system: a planet under pressure. Springer, BerlinGoogle Scholar
- Tashi Y, Chamard PC, Courel M-F, Tiyip T, Tuerxun Y, Drake S (2010) The recent evolution of the oasis environment in the Taklimakan Desert, China. In: Water and sustainability in arid regions. Springer, Dordrecht, pp 51–74Google Scholar