生态学报2017，Vol.37Issue(3)：760-769,10.DOI:10.5846/stxb201509091861
6种温带森林凋落量年际及年内动态
Inter-and intra-annual dynamics in litter production for six temperate forests
摘要
Abstract
Litter production and its composition in temperate forests show seasonal dynamics due to changes in the ecosystem structure and environment,which directly affect the nutrient cycling and ecological services in the ecosystems.In this study,we investigated seasonal dynamics in the litter production and its composition for six forest types in Maoershan region for six continuous years in order to reveal the factors driving the inter-and intra-annual variability of the litter production.The results showed that annual litteffall (t/hm2) decreased in the order of:Quercus mongolica stand (4.60) ＞mixed deciduous stand (4.21) ＞ hardwood stand (4.03) ＞ Pinus koraiensis plantation (3.95) ＞ Populus-Betula stand (3.89) ＞ Larix gmelinii plantation (3.85).There was a significant difference in total litterfall among the six stands.The litter production fluctuated interannually and showed an overall increasing tendency.The interannual variation in the litter composition depended upon its compoents:the litter production of woody tissues was relatively stable;that of foliages was consistent with the total litter production;and that of reproductive tissues and others increased with stand age.The production of total litter showed a mono-peak seasonal pattern for all the stands,and the occurrence of the peak varied with forest type.The litter production of woody tissues displayed a bimodal seasonal course;that of foliages was a mono-peak curve;and that of reproductive tissues and others was relatively stable intra-annually.Total rainfall significantly influenced the inter-annual litter production (P ＜ 0.05),and explained 90％ and 87％ of the variability in the total litter production and the production of woody tissues,respectively.Mean temperature,cumulative temperature and total rainfall significantly affected intra-annual variability in litter production,among which the effect of total rainfall was dominant.In conclusion,rainfall,in addition to the biological characteristics of the forests,was a key factor driving the inter-and intra-annual dynamics in litter productions.关键词
帽儿山/森林群落/凋落量/动态Key words
Maoershan/forest community/litter production/dynamics引用本文复制引用
武启骞,王传宽,张全智..6种温带森林凋落量年际及年内动态[J].生态学报,2017,37(3):760-769,10.基金项目
教育部长江学者和创新团队发展计划(IRT15R09) （IRT15R09）
中央高校基本科研业务费专项资金项目(2572014AA11) （2572014AA11）
