Ecological Responses of Hippophae Rhamnoides to Wind-sand Hazard in Alpine Sand Land
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    Abstract:

    [Objective] Hippophae rhamnoides is a typical species that controlling alpine desertification. Study on the responses of this artificial plant to wind-sand hazard is of great importance in exploring the vegetation adaptive mechanism and directing the sand-control work.[Methods] The annual vegetation quadrat survey and the sand surface erosion monitoring.[Results] The H. rhamnoides community features have been found changed temporally and spatially with the sand surface erosion intensity. Firstly, patterns of light wind erosion and medium sand accumulation contributed to the plant growth and community development of H. rhamnoides. Comparatively, the average vegetation height and canopy in fixed or semi-fixed sand dunes were 3~6 times larger than that in mobile sand dunes. Secondly, significant parabolic relationships were found between the community features and the erosion/deposition depth with the optimal sand deposition depth of 30-40 cm for eight-years-old H. rhamnoides forest. Thirdly, the H. rhamnoides community features changed with the sand transport rate, surface roughness and annual erosion depth as significant fitting curve of exponential decline, multiple functions increase and quadratic increase, respectively.[Conclusion] H. rhamnoides showed a strong resistance to wind erosion and sand-burial. A number of influential factors, including afforesting sites, forest structure optimizations and enrichment of other vegetation species, should be taken into accounts in protecting community succession and ecology restoration.

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吴汪洋,张登山,田丽慧,张明远,周鑫.高寒沙区人工沙棘对风沙危害的生态响应[J].水土保持通报英文版,2018,38(3):1-7,13

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History
  • Received:November 27,2017
  • Revised:December 08,2017
  • Adopted:
  • Online: July 06,2018
  • Published: