Sand barriers of straw checkerboards for habitat restoration in extremely arid desert regions
Sand barriers of straw checkerboards for habitat restoration in extremely arid desert regions
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DOI：
10.1016/j.ecoleng.2006.05.020
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发表时间：
2006-11-30
影响因子：
3.8
通讯作者：
Zhang, J. G.
中科院分区：
文献类型：
--
作者：
Li, X. R.;Xiao, H. L.;Zhang, J. G.
许多人类开发和建设，如管道走廊、输电线路和运输路线，都因沙漠地区的沙流和沙丘掩埋而遭受破坏。稳定移动沙丘并将其转变为稳定的生产性生态系统对生态学家来说是一个挑战。建立稻草棋盘是最有效的沙障方法之一，自 20 世纪 50 年代以来已在世界各地和沙漠地区采用。为了更好地了解其在生态恢复过程中的作用，通过现场实验观察评估了秸秆棋盘的环境效应。结果表明，秸秆棋盘增强了沙丘系统截留灰尘沉积的能力，导致土壤有机质和养分的积累，并促进沙丘表面成土的发展。秸秆棋盘增加了淤泥和粘土含量，从而使粗土质地变细。这是草本植物入侵并在沙漠生态系统中建立的重要前提之一。当在建立固沙植被之前使用稻草棋盘稳定沙丘时，本研究发现植物物种丰富度、草本覆盖、灰尘沉积和土壤理化性质存在显着差异。这些结果表明，秸秆棋盘格作为修复荒漠生态系统的关键技术之一，将成为进一步拓展荒漠地区生态工程的重要组成部分。 (c) 2006 Elsevier B.V. 保留所有权利。
Many human exploitations and constructions, such as pipeline corridors, power transmission lines and transportation routes, suffer from damage due to sand transport and dune burial in and desert regions. It is a challenge for ecologists to stabilize mobile dunes and to change them into stable productive ecosystems. The establishment of a straw checker-board is one of the most effective methods of creating a sand barrier and has been employed since the 1950s in the and desert regions of the world. In order to better understand its role in the process of ecological restoration, the environmental effects of a straw checkerboard were evaluated through field experimental observation. The results indicate that the straw checkerboard enhanced the capacity of dune systems to entrap dust deposition, leading to the accumulation of soil organic matter and nutrients and to the development of soil formation on the dune surface. The straw checkerboard increased the silt and clay content, thereby changing coarse soil texture to fine. This is one of the vital prerequisites for the invasion and establishment of herbaceous plants in desert ecosystems. When a straw checkerboard was used to stabilize the dunes before establishing sand-binding vegetation, significant differences in plant species richness, herbaceous cover, dust deposition, and soil physicochemical properties were found in this study. All of these findings suggest that the use of the straw checkerboard, as one of the key techniques for restoring desert ecosystems, will be an important component of efforts to further extend ecological engineering projects in and desert regions. (c) 2006 Elsevier B.V. All rights reserved.