| 生物土壤与生态 |
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| A Review on Elm Natural Regeneration in Woodland Steppe in Sandy Land |
| TANG Yi1,2, JIANG De-ming1, CHEN Xue-feng3, TOSHIO Oshida4 |
| 1.Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 3.Wengniute Banner Forestry Bureau, Wengniute Banner 024500, Inner Mongolia, China; 4.Azabu University, Sagamihara 252-5201, Japan |
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Abstract Elm woodland steppe consists of sparse tree, shrub, and herbage. This vegetation type has uniqueness in ecosystem structure and function. The area of elm woodland steppe is decreasing recently in China, and lack of elm natural regeneration might be the key reason. The literature of elm natural regeneration was reviewed in this paper, focusing on population characteristics, tree-grass relation, microhabitat and human activity. Main conclusions are as follows: Spatial distribution of elm population develops from aggregated to random with age growth; elm and herbage coexists based on differentiation niche; vegetation coverage, microhabitat, human activity and enclosure all influence elm regeneration greatly. Some potential hot issues include pair distribution of elm plants, elm seeds invading into grass gap, effects of wind erosion and sand burying on elm regeneration and the best period of enclosure for elm regeneration. In the end, two key research directions are brought forward: relation of elm woodland steppe with globe climate change, and relation of elm woodland steppe with vegetation restoration in sandy land.
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Received: 04 January 2010
Published: 20 September 2011
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2011, Vol. 31 
