摘要
边缘效应是通过生物的和非生物因子作为条件载体或直接影响两个相邻生态系统。以西洞庭湖区作为研究区域,以杉木林和松类景观为研究对象,设置核心区和边缘区,通过生产力和物种多样性测算边缘效应。结果表明:两相邻斑块边缘区比核心区平均胸径、平均树高和蓄积均有增大趋势,而且幼龄林和中龄林比成熟林趋势明显,平均胸径比平均树高变化幅度大。从物种多样性分析,现存杉木林和松木类核心区灌木层和草本层物种种类明显多。
Edge effect is achieved by biotic and abiotic factors as condition carrier or directly influences two adjacent ecosystems. By taking West Dongting Lake Region as the studied site, Chinese fir and conifer landscape as the studied objects, the core zone and fringe zone have been set, thus the fringe effect was measured and calculated by the productivity and species diversity of the studied area. The results show that the average DBH, mean tree height and volume in the fringe zone of two adjacent patches increased than those in the two core zones, this tendency was more obvious in the young forest and middle-aged forest than in the mature forest, and the average DBH changed greater than the average tree height. From the perspective of species diversity, in the current existing Chinese fir and conifer forests of the core zones, the species numbers in the shrub layer and herb layer significantly inereaesd.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2013年第9期22-26,共5页
Journal of Central South University of Forestry & Technology
基金
国家自然科学基金项目(30972362)
关键词
杉木林
松类
景观斑块
边缘效应
西洞庭湖区
Chinese fir forest
conifer
landscape patches
fringe effect
West Dongting Lake Region
