干旱区生态环境知识资源中心(Arid): 岷江上游干旱河谷农林边界影响域的研究

Arid

	岷江上游干旱河谷农林边界影响域的研究
其他题名	Depth of edge influence on agriculture-forestry boundary in arid valley of upper reaches of Minjiang River, China
	李丽光 1; 何兴元 1; 李秀珍 1; 问青春 1; 赵永华 1; 胡志斌 1; 常禹 1; 朱亚平 2
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2004
卷号	15 期号:10 页码:1804-1808
中文摘要	对岷江上游农林边界的影响域进行研究,以提高该区管理农田和林地的水平.共调查3种类型农林边界10条样带,采用移动窗口法对植物多样性的数据进行分析,结果表明,当窗口宽度达到6～10时,SED曲线的变化趋向稳定,并且在曲线上有一或两个峰值出现.不同类型边界的影响域是不同的,但均在距边界50 m内.各类型边界的影响域多在12～30 m之间.6条林地样带只有M2和M6样带林地的影响域被确定,而4条农田样带的影响域均被确定.影响域的大小取决于边界两侧斑块类型和地形以及小气候等因子,但坡向对其影响不大;移动窗口法能有效地刻画边界动态,是一种分析边界简单而有力的工具.这些结果有利于进一步理解干旱河谷区农林间的相互作用.
英文摘要	By using moving split-window techniques (MSWT), this study estimated how far the edge effects penetrated the forest and agricultural fields in the arid valley of upper reaches of Minjiang River, southwestern China. Its aim was to provide general information on vegetation along edge to interior gradients in order to assist in interpreta-tion and prediction of biological phenomena associated with agriculture-forestry boundary, and to improve current management practices in such areas. Three types of boundaries (10 transects) were investigated and sampled. The results showed that.when the window width reached 6~10, the change of the SED curve on the graph tend-ed to become stable, and one or two peaks occurred. The depth of edge influence was clearly different for different types of boundaries, and could be estimated within 50 m from the edge to interior. The depth of edge influence (DEI) on vegetation diversity almost varied between 12 - 30 m, mainly depending on the patch type, topography and microclimate, but seldom on slope orientation. Of the 6 forest transects in the three types of boundaries, the DEI was detected only in the forest part transects M2 and M6, but almost detectable in the agricultural part of all transects. MSWT was considered to be a useful tool for characterizing edge dynamics if enough data was avail-able, and became a simple and powerful technique for analyzing the boundary. The results will provide further knowledge for understanding the interaction between forestry and agriculture in the arid valley.
中文关键词	边界效应 ; 边界 ; 移动窗口法 ; 影响域
英文关键词	Edge effects Boundary Moving split-window techniques (MSWT) Depth of edge influence
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:1650499
来源机构	中国科学院沈阳应用生态研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205630
作者单位	1.中国科学院沈阳应用生态研究所, 沈阳, 辽宁 110016, 中国; 2.中国科学院成都生物研究所, 成都, 四川 610041, 中国
推荐引用方式 GB/T 7714	李丽光,何兴元,李秀珍,等. 岷江上游干旱河谷农林边界影响域的研究[J]. 中国科学院沈阳应用生态研究所,2004,15(10):1804-1808.
APA	李丽光.,何兴元.,李秀珍.,问青春.,赵永华.,...&朱亚平.(2004).岷江上游干旱河谷农林边界影响域的研究.应用生态学报,15(10),1804-1808.
MLA	李丽光,et al."岷江上游干旱河谷农林边界影响域的研究".应用生态学报 15.10(2004):1804-1808.