干旱区生态环境知识资源中心(Arid): Causal effects of shelter forests and water factors on desertification control during 2000-2010 at the Horqin Sandy Land region, China

Arid

	Causal effects of shelter forests and water factors on desertification control during 2000-2010 at the Horqin Sandy Land region, China
	Yan Qiaoling; Zhu Jiaojun; Zheng Xiao; Jin Changjie
来源期刊	Journal of Forestry Research
ISSN	1007-662X
出版年	2015
卷号	26 期号:1 页码:33-45
英文摘要	The Horqin Sandy Land (HSL), the largest sandy land in the semi-arid agro-pastoral ecotone of Northeast China, has been subject to desertification during the past century. In response, and to control the desertification, government implemented the Three-North Shelter/Protective Forest Program, worlds largest ecological reforestation/ afforestation restoration program. The program began in 1978 and will continue for 75 years until 2050. Under-standing the dynamics of desertification and its driving forces is a precondition for controlling desertification. However, there is little evidence to directly link causal effects with desertification process (i.e., on the changing area of sandy land) because desertification is a complex process, that can be affected by vegetation (including vegetation cover and extent of shelter forests) and water factors such as precipitation, surface soil moisture, and evapotranspiration. The objectives of this study were to identify how influencing factors, especially shelter forests, affected desertification in HSL over a recent decade. We used Landsat TM imagery analysis and path analysis to identify the effects of spatiotemporal changes in water and vegetation parameters during 2000-2010. Desertification was controlled during the study period, as indicated by a decrease in desert area at a rate of 163.3 km~2 year~(-1) and an increase in the area with reduced intensity or extent of desertification. Total vegetation cover in HSL increased by 10.6 % during the study period and this factor exerted the greatest direct and indirect effects on slowing desertification. The contribution of total vegetation cover to controlling desertification increased with the intensity of desertification. On slightly and extremely severe desertified areas, vegetation cover contributed 5 and 42 % of the desertification reduction, respectively. There were significant correlations between total vegetation cover and water conditions (i.e., evapotranspiration and precipitation) and the area of shelter forests (P < 0.0001), in which water conditions and the existence of shelter forests contributed 49.7 and 12.8 % to total vegetation cover, respectively. The area of shelter forests increased sharply due to program efforts, but only shrub forests had significant direct effects on reducing the area of desertification categorized as slightly desertified. The reason for the lack of direct effect of increased arbor forests (accounting for 95.3 % of the total increase in shelter forests) on reducing desertification might be that the selected arbor species were not suited to water conditions (low precipitation, high evapotranspiration) prevailing at HSL. The establishment of shelter forests aided control of desertification in the HSL region, but the effect was less than expected. Effective control of desertification in the HSL region or other similar sandy areas will require greater improvements in vegetation cover. In particular, shrub species should be selected for plantation with reference to their potential to survive and reproduce in the harsh climatic and weather conditions typical of desertified areas.
英文关键词	The Three-North Shelter Forest Program Precipitation Remote sensing Vegetation cover Semi-arid region
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:5370031
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335456
作者单位	Yan Qiaoling, Institute of Applied Ecology, Chinese Academy of Sciences, State Key Laboratory of Forest and Soil Ecology, Shenyang, Liaoning 110164, China.; Zhu Jiaojun, Institute of Applied Ecology, Chinese Academy of Sciences, State Key Laboratory of Forest and Soil Ecology, Shenyang, Liaoning 110164, China.; Zheng Xiao, Institute of Applied Ecology, Chinese Academy of Sciences, State Key Laboratory of Forest and Soil Ecology, Shenyang, Liaoning 110164, China.; Jin Changjie, Institute of Applied Ecology, Chinese Academy of Sciences, State Key Laboratory of Forest and Soil Ecology, Shenyang, Liaoning 110164, China.
推荐引用方式 GB/T 7714	Yan Qiaoling,Zhu Jiaojun,Zheng Xiao,et al. Causal effects of shelter forests and water factors on desertification control during 2000-2010 at the Horqin Sandy Land region, China[J],2015,26(1):33-45.
APA	Yan Qiaoling,Zhu Jiaojun,Zheng Xiao,&Jin Changjie.(2015).Causal effects of shelter forests and water factors on desertification control during 2000-2010 at the Horqin Sandy Land region, China.Journal of Forestry Research,26(1),33-45.
MLA	Yan Qiaoling,et al."Causal effects of shelter forests and water factors on desertification control during 2000-2010 at the Horqin Sandy Land region, China".Journal of Forestry Research 26.1(2015):33-45.