摘要
以红松阔叶林内早春草本植物为研究对象,根据不同的采伐时间及采伐强度设置10条1 m×100 m的调查样带,分析了早春草本植物的组成及结构特征,并结合TWINSPAN分析探讨了择伐干扰对早春草本植物数量特征的影响.调查结果表明:研究区内早春草本植物群落共有23科63属73种植物,其中包括早春植物12种,主要为毛茛科、百合科和罂粟科植物;早春开花植物14种,早春展叶植物47种.早春植物、早春开花植物及早春展叶植物物种数占总物种数的百分比随择伐干扰后恢复时间的变化较小,物种数比例接近5∶4∶11.早春草本植物总个体数随着恢复时间的增加整体上呈下降趋势.采伐强度增大导致早春草本层物种多样性、丰富度和均匀度下降.TWINSPAN划分结果较好地揭示了采伐干扰与早春草本植物群落结构以及环境条件之间的关系.
Tree logging was a common type of disturbance in forest regions and different logging techniques varied in their influences on composition of forest communities. In this paper, a 1 m × 100 m belt were estab- lished and surveyed in each of ten stands of broad-leaved Korean pine forest with different cutting time and intensity in Hongshi Forest Farm, and composition of early spring plants synusia under different disturbance regimes were analyzed to probe the relationship between disturbance regime and quantitative characteristics of this special synusia by TWINSPAN. Results showed that, there were 73 species belonging to 63 genera in 23 families in the forests, including 12 early spring species, mainly from Ranunculaceae family, Liliaceae family and Papaveraceae family, 14 early spring blossoming species and 47 early spring foliating species. The total number of early spring plants could be described with equation y = 4 552. 013 4 ＋ 146. 303 5 x （R2 = 0. 589, P 〈 0.05）, which noted a increase of density with recover time after disturbance. And heavy intensity of logging led to decrease of species biodiversity, richness and evenness of early spring plants synusia. Using TWlNSPAN, the classification result could interpret the relationship among disturbance regimes, synusia composition, and environmental conditions in the communities well.
出处
《东北师大学报（自然科学版）》
CAS
CSCD
北大核心
2008年第4期109-114,共6页
Journal of Northeast Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(30470180)
国家“十五”科技攻关项目(2001BA510B0704)
教育部“高校青年教师奖励计划”资助项目(2000103)
