干旱区生态环境知识资源中心(Arid): 民勤荒漠区主要植物群落的稳定性及生态效应

Arid

	民勤荒漠区主要植物群落的稳定性及生态效应
其他题名	Stability and Ecological Effect of Mainly Plant Communities in Minqin Desert Area
	常兆丰; 段小峰; 韩福贵; 仲生年; 王强强; 张剑挥
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2014
卷号	34 期号:12 页码:2562-2568
中文摘要	以民勤荒漠区5种主要植物群落10个样方12年的定位观测资料为基础,运用植被盖度和投影盖度2个指标对荒漠区植物群落的稳定性及其生态效应进行分析,以期阐释随着全球变暖荒漠植物群落的稳定性和生态效应的变化规律。观测结果表明,沙蒿(Artemisia arenaria)的植被盖度和麻黄(Ephedra przewalskii)的植被盖度以及沙蒿的投影盖度和梭梭(Haloxylon ammodendron)人工林的投影盖度显著下降,白刺(Nitraria tangutorum)的植被盖度亦下降。分析结果表明:(1)植被盖度相对较低的群落的稳定性较强,而植被盖度相对较高的群落的稳定性相对较差。(2)当年降水量是决定植被盖度及其投影盖度的关键因子。(3)单位面积的白刺的生态功能最大,其次是麻黄,再次是白刺+梭梭,单位面积的沙蒿的生态功能最低。荒漠区植被稀疏,植株枝条分布极不规则,以冠幅计算所得的植被盖度不能反映植被实际覆盖地表的状况。
英文摘要	Minqin County is one of the major areas of desertification in China.In this paper,the stability and ecological effects of 5 mainly plant communities were analyzed with 12 years of positioning observations in Minqin desert area.Observations show:Vegetation cover was significantly decreased of Artemisiaarenaria and Ephedra przewalskii,and projective cover is significantly decreased of A.arenariaand Haloxylon ammodendron plantation.Vegetation cover of Nitraria tangutorum also decreased.The analysis showed that: (1)Plant community of cover relatively low stability is strong.The plant community of cover relatively high stability is weaker.(2)Year rainfall is the key factor for determining the vegetation cover and the projector cover.(3)Ecological functions of Nitraria tangutorum per unit area is the largest,followed by E. przewalskii,and the third is N.tangutorum+H.ammodendron.Ecological functions of A.arenariaper unit area is the lowest.Vegetation of desert area sparse and plant shoots distribution is extremely irregular. Vegetation cover is calculated with plants crown does not reflect the actual situation of surface covered by vegetation.
中文关键词	植物群落 ; 稳定性 ; 生态效应 ; 民勤荒漠区
英文关键词	plant communities stability ecological effects Minqin desert area
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:5329284
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231919
作者单位	甘肃省治沙研究所, 甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	常兆丰,段小峰,韩福贵,等. 民勤荒漠区主要植物群落的稳定性及生态效应[J]. 甘肃省治沙研究所,2014,34(12):2562-2568.
APA	常兆丰,段小峰,韩福贵,仲生年,王强强,&张剑挥.(2014).民勤荒漠区主要植物群落的稳定性及生态效应.西北植物学报,34(12),2562-2568.
MLA	常兆丰,et al."民勤荒漠区主要植物群落的稳定性及生态效应".西北植物学报 34.12(2014):2562-2568.