北京林业大学学报2016，Vol.38Issue(11)：57-66,10.DOI:10.13332/j.1000-1522.20160012
长白山阔叶红松林乔木幼苗年际动态及影响因素
Interannual seedling dynamic and influencing factors on seedling survival of tree species in a broadleaved Korean pine (Pinus koraiensis) mixed forest in Changbai Mountains, northeastern China
摘要
Abstract
This paper is to understand the interannual dynamic and influencing factors on seedling survival in a broadleaved Korean pine ( Pinus koraiensis) mixed forest in northeastern China. 100 seedling monitoring (1 mí1 m) quadrats were set at Changbai Mountains, of which DBH<1 cm seedlings in quadrats were tagged, measured and identified to the species. Based on seven censuses from 2006 to 2014, we analyzed the species composition and interannual dynamic of all seedlings, especially for seedling recruitment and death. We examined the relative importance of biotic neighborhood and habitat heterogeneity on seedling survival by using generalized mixed linear model. A total of 13 tree seedling species were identified and recorded. Results showed that:1) there were a little difference of the species composition from 2006 to 2014, and we monitored 9 common seedling species each year. 2) There were great temporal fluctuation in seedling density, of which the highest was 38. 9 seedlings per m2 and the lowest was 3. 8 seedlings per m2 . 3) Tree seedlings had a large number of regeneration and death every year. On the age structure of arbor seedlings in the community, 1-year-old seedlings had most individuals in most cases, some years had a little difference. With the increase of seedling age, seedling numbers decreased gradually. The dynamic change of total seedling numbers agreed with that of regenerated seedling numbers. The seedling death peak was 1 year time delay than the seedling total peak. We found that both biotic neighbors and habitat heterogeneity had significant effects on the seedling survival at community level. 4 ) The basal area at breast height of conspecific adult and canopy openness had significant positive effect on seedling survival, while heterospecific seedling neighbors showed negative effect. Our results suggested that the majority of tree species in Changbai Mountains were recruitment-limited, which might have important consequences for species coexistence. High temporal variability in seedling density emphasized the importance of long term studies to understanding of forest dynamics. Nearly a decade of seedling monitoring can make us understand the community regeneration process more accurately.关键词
阔叶红松林/年际动态/新生与死亡/物种组成/乔木幼苗存活/生物邻体/生境异质性Key words
broadleaved Korean pine ( Pinus koraiensis ) mixed forest/interannual dynamic/regeneration and death/species composition/tree seedling survival/biotic neighborhood/habitat heterogeneity分类
农业科技引用本文复制引用
刘帅,肖翠,王均伟,侯嫚嫚,廖嘉星,范秀华..长白山阔叶红松林乔木幼苗年际动态及影响因素[J].北京林业大学学报,2016,38(11):57-66,10.基金项目
“十二五”国家科技支撑计划项目(2012BAD22B0203)。 （2012BAD22B0203）
