Soil fauna accelerated litter C and N release by improving litter quality across an elevational gradient

被引:8
作者
Zhang, Li [1 ]
Liu, Jingru [1 ]
Yin, Rui [2 ]
Xu, Zhenfeng [1 ]
You, Chengming [1 ]
Li, Han [1 ]
Wang, Lixia [1 ]
Liu, Sining [1 ]
Xu, Hongwei [1 ]
Xu, Lin [1 ]
Liu, Yang [1 ]
Wang, Yong [1 ]
Tan, Bo [1 ]
机构
[1] Sichuan Agr Univ, Coll Forestry, Forestry Ecol Engn Upper Reaches Yangtze River Key, Chengdu 611130, Peoples R China
[2] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
关键词
Carbon remaining; Nitrogen remaining; Nitrogen retention; Soil fauna; Elevational gradient; HOME-FIELD ADVANTAGE; FOLIAR LITTER; TERRESTRIAL ECOSYSTEMS; PHOSPHORUS DYNAMICS; LAND-USE; DECOMPOSITION; CLIMATE; NITROGEN; FOREST; LEAF;
D O I
10.1186/s13717-023-00459-4
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Background Soil fauna is an important driver of carbon (C) and nitrogen (N) release from decomposing litter in forest ecosystems. However, its role in C and N cycling concerning climate and litter traits remains less known. In a 4-year field experiment, we evaluated the effects of soil fauna on litter C and N release across an elevation gradient (453, 945, 3023, and 3582 m) and litter traits (coniferous vs. broadleaf) in southwestern China. Results Our results showed that N was retained by -0.4% to 31.5%, but C was immediately released during the early stage (156-516 days) of decomposition for most litter species. Soil fauna significantly increased the peak N content and N retention across litter species, but reduced the C/N ratio for certain species (i.e., Juniperus saltuaria, Betula albosinensis, Quercus acutissima, and Pinus massoniana litter), leading to more C and N being released from decomposing litter across the elevation gradient. Contributions of soil fauna to C and N release were 3.87-9.90% and 1.108.71%, respectively, across litter species after 4 years of decomposition. Soil environment and initial litter quality factors caused by elevation directly affected litter C and N release. Changes in soil fauna resulting from elevation and fauna exclusion factors had a direct or indirect impact on C and N release during litter decomposition. Conclusions Our findings suggest that soil fauna promote C and N release from decomposing litter in different magnitudes, mainly controlled by environmental conditions (i.e., temperature and moisture), litter quality (i.e., lignin and cellulose content, and lignin/cellulose), and its diversity across the elevation gradient.
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页数:13
相关论文
共 63 条
[2]   Home-field advantage accelerates leaf litter decomposition in forests [J].
Ayres, Edward ;
Steltzer, Heidi ;
Simmons, Breana L. ;
Simpson, Rodney T. ;
Steinweg, J. Megan ;
Wallenstein, Matthew D. ;
Mellor, Nate ;
Parton, William J. ;
Moore, John C. ;
Wall, Diana H. .
SOIL BIOLOGY & BIOCHEMISTRY, 2009, 41 (03) :606-610
[3]   Experimental evidence that soil fauna enhance nutrient mineralization and plant nutrient uptake in montane grassland ecosystems [J].
Bardgett, RD ;
Chan, KF .
SOIL BIOLOGY & BIOCHEMISTRY, 1999, 31 (07) :1007-1014
[4]  
Berg B., 2014, PLANT LITTER DECOMPO, DOI DOI 10.1007/978-3-642-38821-7
[5]   Leaf litter decomposition rates increase with rising mean annual temperature in Hawaiian tropical montane wet forests [J].
Bothwell, Lori D. ;
Selmants, Paul C. ;
Giardina, Christian P. ;
Litton, Creighton M. .
PEERJ, 2014, 2
[6]   Microbiota, fauna, and mesh size interactions in litter decomposition [J].
Bradford, MA ;
Tordoff, GM ;
Eggers, T ;
Jones, TH ;
Newington, JE .
OIKOS, 2002, 99 (02) :317-323
[7]   Understanding the dominant controls on litter decomposition [J].
Bradford, Mark A. ;
Berg, Bjorn ;
Maynard, Daniel S. ;
Wieder, William R. ;
Wood, Stephen A. .
JOURNAL OF ECOLOGY, 2016, 104 (01) :229-238
[8]  
Bradford MA, 2014, NAT CLIM CHANGE, V4, P625, DOI [10.1038/nclimate2251, 10.1038/NCLIMATE2251]
[9]   Soil Microbial Biomass Carbon and Freeze-Thaw Cycles Drive Seasonal Changes in Soil Microbial Quotient Along a Steep Altitudinal Gradient [J].
Cao, Rui ;
Yang, Wanqin ;
Chang, Chenhui ;
Wang, Zhuang ;
Wang, Qin ;
Jiang, Yurui ;
Li, Han ;
Tan, Bo .
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 2021, 126 (09)
[10]  
Chapin F. S., 2002, PRINCIPLES TERRESTRI