摘要
在福建省三明市罗卜岩自然保护区内设置 1 60 0m2 样地 5个 ,应用相邻格子法进行每木调查获得野外资料。通过对闽楠种群结构和空间格局的研究 ,结果表明 :闽楠种群结构呈金字塔型 ,具有丰富幼苗贮备 ,约 1 0 80 3株·hm- 2 ;在不同的演替群落中闽楠种群结构表现出不同的特征 ;但随着群落的演替 ,种群大小结构呈现一定的规律变化 ;存活曲线的特性表现为种群从Ⅰ级苗发育到Ⅱ级苗过程中死亡率均较高 ,平均约82 3 %。在常绿阔叶林群落中闽楠种群空间分布聚集强度较其在常绿落叶阔叶混交林群落中为低 ;闽楠种群不同发育阶段空间分布格局有较大差别 ,总体趋势是由集群分布向随机分布转变 ,由聚集度高向聚集度低转变 ;不同群落生境对闽楠种群空间分布格局产生影响。同时 ,闽楠种群空间分布格局也受区组大小影响。最后 ,对闽楠种群濒危原因和保护做了初步探讨。
Five plots of 1 600 m 2 including 320 contiguous grid quadrats in Luo Boyan Nature Reserve in Fujian Province were investigated and analysed to reveal size structure and spatial distribution pattern of Phoebe bournei population.The results indicated that P. bournei population structures at five plots were obviously different,but all in pyramid shape. P. bournei population in this area was steadly increasing, or maturing with about 10 803 seedlings·hm -2 input.Mortality rate was about 82.3% from class Ⅰto class Ⅱ.Aggregate intensities of P. bournei population were different in communities of two types;Spatial distribution patterns in growth phases were effected by enviromental conditions,e.g.light level,slope gradient,and quadrat size.Factors causing the decrease of population were briefly discussed and protection measures were proposed.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2003年第1期23-30,共8页
Scientia Silvae Sinicae
基金
中国博士后科学基金资助项目
