干旱区生态环境知识资源中心(Arid): 民勤绿洲景观生态安全格局分析

Arid

	民勤绿洲景观生态安全格局分析
其他题名	Changes of landscape pattern ecological security during 1999 - 2013 in Minqin oasis
	张恒玮; 周俊菊; 王兰英
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2016
卷号	30 期号:1 页码:125-129
中文摘要	基于1999、2013年覆盖民勤绿洲的两期TM影像数据,利用Arcgis技术获得各景观类型的空间特征指标和基于景观空间邻接的绿洲生态安全指标,进而在空间格局方面对绿洲的生态安全进行评价。结果表明:1999-2013年,1)受潜在沙化威胁程度最大的斑块类型由耕地变为了林地,而居民地始终是受威胁程度最小的斑块类型; 从变化趋势来看,耕地斑块受沙化威胁在减小,而林地、草地受沙化威胁在增加,居民地则不变。2)耕地受潜在盐碱化威胁的程度不变,并且始终是受盐碱化威胁程度最大的斑块类型; 其余斑块类型受盐碱化威胁的程度都呈减小趋势。3)在绿洲水平上,绿洲整体受潜在沙化威胁的程度在增加,受潜在盐碱化威胁在减小。
英文摘要	Based on the TM image of Minqin oasis in 1999 and 2013,we used GIS technique to achieve the spatial neighboring length and number between oasis types and desert or Salina - marsh in the Minqin Oasis; and the threatening degree of oasis ecological security was discussed. The results indicated that: (1) The desertification on farm lands was the most significant in 1999,while the threat on the woodland was the most severe in 2013. The threats on residential areas were minor both in 1999 and 2013 and remained the same during the study period of 14 years. From the point of change trend,cultivated land patches of potential desertification threat was in decrease, and the forest land,grassland desertification degree of the potential threat were increased,the inhabitants were the same. (2) Compared with 1999,the threat of potential salinization degree for farmland by 2013 hah not changed,but farmland was also affected by the salt alkalization,and the degree was the biggest in all patch types; the other patch types by the threat of salinization degree all showed decrease trends. (3) On the level of oasis,the landscape threatened by desertification in Minqin oasis was increased,and that threatened by salinity was decreased.
中文关键词	景观变化 ; 生态安全 ; 民勤绿洲
英文关键词	Minqin oasis landscape dynamics ecological safety
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5623912
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234345
作者单位	西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	张恒玮,周俊菊,王兰英. 民勤绿洲景观生态安全格局分析[J]. 西北师范大学,2016,30(1):125-129.
APA	张恒玮,周俊菊,&王兰英.(2016).民勤绿洲景观生态安全格局分析.干旱区资源与环境,30(1),125-129.
MLA	张恒玮,et al."民勤绿洲景观生态安全格局分析".干旱区资源与环境 30.1(2016):125-129.