Plant litter quality influences the contribution of soil fauna to litter decomposition in humid tropical forests, southwestern China
Plant litter quality influences the contribution of soil fauna to litter decomposition in humid tropical forests, southwestern China
复制标题
植物凋落物质量影响土壤动物对中国西南部湿润热带森林凋落物分解的贡献
DOI：
10.1016/j.soilbio.2008.12.028
复制
发表时间：
2009-05
影响因子：
9.7
通讯作者：
陈进
中科院分区：
文献类型：
--
作者：
杨效东;陈进
通过田间试验，定量研究了在自然条件下，西双版纳3个不同C/N比林地土壤动物对植物凋落物分解的贡献。对热带次生林、常绿阔叶林和热带雨林的土壤动物群落、林下凋落物进行了为期两年的调查，并对混合树种叶凋落物的质量损失进行了调查。用不同规格的落叶袋(2 mm和0.15 mm)从落叶中排除不同大小的土壤动物。每个月测定一次枯枝落叶物质的质量损失和C、N浓度。结果表明：(1)3种森林的凋落物生物量和养分含量不同，但土壤动物丰富度和丰富度差异不大；(2)在排除大型土壤动物和大多数中型动物的情况下，凋落物的质量损失和分解速度较慢；(3)土壤动物对植物凋落物分解的贡献最大的是热带雨林，其叶片凋落物的C/N比也最高(41.5%：54.8 C/N比)，而阔叶林为8.69%，次生林为19.52%，两者的C/N比均较低；32)。结果表明，土壤动物在热带雨林混交叶凋落物的分解中起着更为显著的作用，土壤动物对热带雨林初始高C/N比凋落物N浓度的提高和C浓度的降低有更大的影响。
The aim of this field experiment was to quantify the contribution of soil fauna to plant litter decomposition in three forest sites differing in C/N ratio under natural conditions in Xishuangbanna, southwestern China. We conducted a survey of soil fauna communities, the forest floor litter and investigated mass loss of mixed tree species leaf litter for two years in a tropical secondary forest, an evergreen broad-leaf forest and a tropical rain forest. Exclusion treatments of different sized soil fauna from the leaf litter by using varying mesh size litter bags (2mm and 0.15mm) were also performed. Mass loss and C and N concentrations in litter bag leaf materials were determined at monthly intervals. We found that: (1) the three forests differed in floor litter biomass and nutrient contents but not in soil fauna richness and abundance; (2) litter mass loss and decomposition rate were slower when soil macrofauna and most of mesofauna were excluded; and (3) greatest soil fauna contribution to plant litter decomposition occurred in the rain forest, where leaf litter C/N ratio was also highest (41.5% contribution: 54.8 C/N ratio), in comparison to 8.69% in the broad-leaf forest and 19.52% in the secondary forest, both with low leaf litter C/N ratios (<32). Our results suggested that, soil fauna played a more pronounced role in the decomposition of mixed leaf litter in tropical rain forest, and significantly bigger effects from fauna were ascribed to the enhancement of N concentration and decrease of C concentration of the initially high C/N ratio litter in this forest site.
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DOI：
10.1177/030913339501900201
发表时间：
1995-06
期刊：
Progress in Physical Geography
影响因子：
--
作者：
R. Corlett
通讯作者：
R. Corlett
影响因子：
3.7
作者：
Wen-Yao Liu;J. Fox;Zai-fu Xu
通讯作者：
Wen-Yao Liu;J. Fox;Zai-fu Xu
影响因子：
9.7
作者：
G. Tian;L. Brussaard;B. Kang
通讯作者：
G. Tian;L. Brussaard;B. Kang
影响因子：
2.4
作者：
J. Blair;R. Parmelee;M. Beare
通讯作者：
J. Blair;R. Parmelee;M. Beare
DOI：
10.1146/annurev.es.17.110186.001033
发表时间：
1986
期刊：
Annual Review of Ecology, Evolution, and Systematics
影响因子：
--
作者：
P. Vitousek;R. Sanford
通讯作者：
P. Vitousek;R. Sanford