干旱区生态环境知识资源中心(Arid): 额济纳绿洲沙漠化对柽柳群落影响的研究

Arid

	额济纳绿洲沙漠化对柽柳群落影响的研究
其他题名	Influence of Sandy Desertification on Tamarix Community in Ejin Oasis
	赵雪 1; 张小由 2; 李启森 2; 周茅先 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2004
卷号	24 期号:4 页码:467-472
中文摘要	柽柳群落是黑河下游额济纳绿洲重要的荒漠河岸林,有河滩和沙地两个亚群系.通过对该区域的考察和对植物群落、土壤的取样分析,表明了在绿洲因水资源短缺而发生环境恶化的过程中,两个亚群系均产生了群落衰退,包括群落种类组成趋向柽柳单一种群,当年生物量占现存生物量比率下降,枝条枯死率上升,而群落盖度、植丛高度、丛幅等无显著变化,因此评估沙漠化的指标应以枝条枯死率为主.土壤表层盐分、有机质和机械组成在河滩系列变化较缓,沙地系列较强烈.在水资源持续短缺情况下,柽柳群落演替的最终结果是柽柳全部死亡后直接演变成裸地和流沙.柽柳群落是额济纳绿洲面积最大的群落类型,因而也是阻止、延缓绿洲沙漠化的最后防线,应注意保护和抚育.
英文摘要	Tamarix community is an important vegetation type distributing on flood land and sandy land in Ejin oasis at the lower reaches of Heihe River. The vegetation and soil were sampled and the two sub-forma-tions of Tamarix community were found at the flood land and sandy land. The characteristics of Tamarix community structure and the soil elements showed that the vegetation is going in the different degraded sta-ges of desertification process. The specie richness and the biomass decreased, the rate of dead branches in-creased, but no significant change in the coverage, plant high, and plant cluster size. The change of soil ele-ment was not much clear with the degradation degree of the sub-formation at flood land, but at the sandy land sub-formation, the salt content of topsoil layer increased, the nutrient, and the organic matter, N and fine particles that less than 0. 1 mm significantly decreased. The Tamarix community is the last line to pre-vent desertification development in the area; we should pay more attention to it and protect the community.
中文关键词	额济纳绿洲 ; 柽柳群落 ; 沙漠化过程
英文关键词	Ejin oasis Tamarix community desertification process
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:1697620
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205758
作者单位	1.烟台师范学院, 烟台, 山东 264025, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	赵雪,张小由,李启森,等. 额济纳绿洲沙漠化对柽柳群落影响的研究[J]. 中国科学院西北生态环境资源研究院,2004,24(4):467-472.
APA	赵雪,张小由,李启森,&周茅先.(2004).额济纳绿洲沙漠化对柽柳群落影响的研究.中国沙漠,24(4),467-472.
MLA	赵雪,et al."额济纳绿洲沙漠化对柽柳群落影响的研究".中国沙漠 24.4(2004):467-472.