摘要
以重庆海石公园人为干扰后自然恢复约50a,20a和5a的石灰岩地区次生演替群落为研究对象,探讨群落水平上不同演替阶段凋落叶功能性状和分解速率的变化规律及二者的联系.结果显示,各演替阶段由较高的群落比叶面积(CSLA)、群落叶氮含量(CLNC)、群落叶磷含量(CLPC)和较低的群落叶干物质含量(CLDMC)向较低的CSLA,CLNC,CLPC和较高的CLDMC转变.在分解160d后,20a恢复群落凋落叶的分解速率最大,50a恢复群落的分解速率最小.在物种水平和群落水平上,LDMC可以较好地预测凋落叶分解,LPC在群落水平也表现出重要的预测能力.随着群落的不断发展,凋落叶LDMC对分解的预测作用在物种水平和群落水平上具有较好的一致性,能较好地反映群落演替过程中的生境状况、植被生长情况及生态系统过程的变化.
Leaf litter functional traits and litter decomposition rates of woody plants from three different successional stages（5-,20-and 50-year natural recovery after anthropogenic interference）in Haishi Park limestone area in Chongqing were explored to define the variations of litter functional traits and decomposition rates in succession series at the community level and the interaction between them.The results showed that during the course of succession,community characteristics shifted from higher community specific leaf area（CSLA）,community leaf nitrogen content（CLNC）and community leaf phosphorus content（CLPC）and from lower community leaf dry matter content（CLDMC）to their opposite.After decomposition for 160 days,the litter decomposition rate of the main woody plants in the 20-year secondary forest was the largest while that in the 50-year secondary forest was the lowest.Besides,there were fairly close correlations between litter decomposition and LDMC at both the species and the community levels and CLPCalso showed a good prediction ability in litter decomposition at the community level.Consequently,LDMC appeared to be a powerful marker of litter decomposition at the species and the community levels,and the relationship between litter traits and decomposition at the community level can reflect the environment conditions,plant growth and the change of ecosystem processes in the community.
作者
祝佳杏
曾嘉庆
党成强
陈淼
陶建平
ZHU Jia-xing ZENG Jia-qing DANG Cheng-qiang CHEN Miao TAO Jian-ping(School of Life Science, Southwest University/Key Laboratory of Eco-Environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing 400715, China)
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2017年第9期51-58,共8页
Journal of Southwest University(Natural Science Edition)
基金
重庆市科委自然科学基金项目(2010BB1011)
关键词
石灰岩地区
演替
功能性状
凋落叶分解
limestone area
succession
functional traits
litter decomposition
