Tree species effects on microbial respiration from decomposing leaf and fine root litter

被引:29
|
作者
Makita, Naoki [1 ,2 ]
Fujii, Saori [1 ,3 ]
机构
[1] Kyoto Univ, Grad Sch Agr, Kyoto 6068502, Japan
[2] Kansai Res Ctr, Forestry & Forest Prod Res Inst, Kyoto 6120855, Japan
[3] Yokohama Natl Univ, Grad Sch Environm & Informat Sci, Yokohama, Kanagawa 2408501, Japan
来源
SOIL BIOLOGY & BIOCHEMISTRY | 2015年 / 88卷
关键词
CO2; efflux; Heterotrophic respiration; Litter quality; Mass loss; Morphology; BELOW-GROUND LITTER; ORGANIC-MATTER; TEMPERATURE SENSITIVITY; ABOVEGROUND LITTER; GLOBAL PATTERNS; SOIL; QUALITY; CARBON; TRAITS; CLIMATE;
D O I
10.1016/j.soilbio.2015.05.005
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Tree species have an impact on decomposition processes of woody litter, but the effects of different tree species on microbial heterotrophic respiration derived from decomposing litter are still unclear. Here we used leaf and fine root litter of six tree species differing in chemical and morphological traits in a temperate forest and elucidated the effects of tree species on the relationships between litter-derived microbial respiration rates and decomposition rates and morphological traits, including specific leaf area (cm(2) g(-1)) and specific root length (m g(-1)) of litter at the same site. Litterbags set in forest soil were sequentially collected five times over the course of 18 months. During litter decomposition, microbial respiration from leaf and fine root litter differed among the six tree species. Temporal changes in the remaining mass and morphology (specific leaf area and specific root length) were observed, and the magnitude of these changes differed among species. Positive correlations were observed between respiration and mass loss or morphology across species. These results revealed that litter mass loss and morphological dynamics during decomposition jointly enhanced microbial respiration, and these carbon-based litter traits explained species differences in,decomposition of leaves and fine roots. In conclusion, tree species influenced the magnitude and direction of microbial respiration during leaf/fine root litter decomposition. Tree species also affected the relationship between microbial respiration and litter decomposition through direct effects of litter traits and indirect effects mediated by regulation of heterotroph requirements. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:39 / 47
页数:9
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