摘要
根据福建安曹下杉木丰产林全林林窗样地调查资料,运用Shannon-Wiener物种多样性指数和Simpson生态优势度指数计算边缘效应强度指数。33个林窗的测定数据表明:用物种多样性指数测定的林窗边缘效应强度值ED为0.6-1.8,而用生态优势度值测定的边缘效应强度值Ec为0.3-3.4。人为干扰形成林窗与自然干扰形成的林窗边缘效应强度接近,边缘效应强度ED在250-300m2面积林窗内达最大值。边缘效应的作用有增大林窗边缘区物种多样性的趋势。
The edge effect of 33 gaps were studied in Cunninghamia lanceolata plantation in Ancaoxia, Fujian Province, China, using the Shannon-Wiener index and Simpson index. The two indexes illustrate the species diversity and the ecological dominance, respectively. The gap edge effect index based on the species diversity （ED） was 0.6-1.8 and that based on the ecological dominance （Ec） was 0.3-3.4. Human disturbance had the same effect on the edge effect of the gaps as nature, and ED reached the peak in the gaps of 250-300 m^2 in size. The edge effect of the gaps is suitable for species diversity in the edge zone.
出处
《热带亚热带植物学报》
CAS
CSCD
北大核心
2007年第3期229-236,共8页
Journal of Tropical and Subtropical Botany
基金
福建省科技厅重大项目(2001F007)
福建省自然科学基金项目(B0110026)资助
关键词
杉木人工林
林窗
边缘效应
物种多样性
生态优势度
Cunninghamia lanceolata plantation
Gap
Edge effect
Species diversity
Ecological dominance
