The contribution of deadwood to soil carbon dynamics in contrasting temperate forest ecosystems
The contribution of deadwood to soil carbon dynamics in contrasting temperate forest ecosystems
复制标题
对比温带森林生态系统中枯木对土壤碳动态的贡献
DOI：
10.1007/s10342-021-01435-3
复制
发表时间：
2021
影响因子：
2.8
通讯作者：
Shannon V
中科院分区：
文献类型：
--
作者：
Shannon V
枯枝落叶是森林系统中重要的碳库，也是土壤溶解有机碳（DOC）输入的潜在来源，但枯枝落叶对森林土壤碳循环的影响尚不清楚。输入土壤的枯枝DOC可以通过吸附作用保留下来，也可以通过微生物分解现有的有机物质来产生额外的DOC。为了确定枯枝落叶对土壤碳循环的影响，我们分析了表层土壤从枯枝落叶或落叶层下，沿着的低地橡树和高地锡特卡云杉林分的时间序列。测定了土壤水溶性有机碳（WEOC）的浓度和质量（光学指数）、原位分解“茶袋指数”（TBI）参数和酶活性测定（β-D-纤维素糖苷酶、β-葡萄糖苷酶、β-木糖苷酶、亮氨酸氨肽酶、磷酸酶、酚氧化酶）。枯木的存在显著（p< 0.05）增加了矿物橡树土壤中的WEOC浓度（~ 1.5至~ 1.75倍），但对云杉土壤中的WEOC没有影响，这可能是因为云杉枯木DOC输入被高背景的WEOC（1168 mg kg− 1土壤）所掩盖，并且/或者没有通过高有机质（~ 90% SOM）土壤中的矿物吸附而保留。TBI和酶的证据表明，枯木衍生的DOC没有影响现有的森林碳库通过微生物引发，可能是由于更多的腐殖化/芳香质量的DOC生产（腐殖化指数为0.75和0.65枯木和落叶WEOC，分别）。森林碳预算，特别是那些矿物质土壤，可能会低估DOC的数量，如果来自土壤监测，不包括枯木组件。
Deadwood forms a significant carbon pool in forest systems and is a potential source of dissolved organic carbon (DOC) input to soil, yet little is known about how deadwood effects forest soil carbon cycling. Deadwood DOC inputs to soil may be retained through sorption or may prime microbial decomposition of existing organic matter to produce additional DOC. To determine impacts of deadwood on soil C cycling, we analysed surface soil from beneath deadwood or leaf litter only, along chronosequences of stands of lowland oak and upland Sitka spruce. The concentration and quality (by optical indices) of water-extracted soil DOC (water-extractable organic carbon; WEOC), in situdecomposition ‘tea bag index’ (TBI) parameters and enzymatic potential assays (β-D-cellubiosidase,β-glucosidase,β-xylosidase, leucine aminopeptidase, phosphatase, phenol oxidase) were determined. Presence of deadwood significantly (p< 0.05) increased WEOC concentration (~ 1.5 to ~ 1.75 times) in the mineral oak soil but had no effect on WEOC in spruce soils, potentially because spruce deadwood DOC inputs were masked by a high background of WEOC (1168 mg kg−1soil) and/or were not retained through mineral sorption in the highly organic (~ 90% SOM) soil. TBI and enzyme evidence suggested that deadwood-derived DOC did not impact existing forest carbon pools via microbial priming, possibly due to the more humified/aromatic quality of DOC produced (humification index of 0.75 and 0.65 for deadwood and leaf litter WEOC, respectively). Forest carbon budgets, particularly those for mineral soils, may underestimate the quantity of DOC if derived from soil monitoring that does not include a deadwood component.
登录
查看更多内容
影响因子：
8.7
作者：
Li, Xiang;Li, Mi;Zheng, Yi
通讯作者：
Zheng, Yi
西特卡云杉 (Picea satchensis (Bong.) Carr.) 造林对泥炭灰土碳储量的影响——英格兰北部的一项时间序列研究
DOI：
10.1093/forestry/cpz013
发表时间：
2019
期刊：
Forestry: An International Journal of Forest Research
影响因子：
--
作者：
E. Vanguelova;P. Crow;S. Benham;R. Pitman;J. Forster;E. L. Eaton;J. Morison
通讯作者：
J. Morison
模拟休眠条件下的异养和自养土壤呼吸
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
Daniel Beverly;S. Franklin
通讯作者：
S. Franklin
管理对温带橡树林中枯木、地面植被和森林地面溶解有机碳释放的影响。
DOI：
10.1016/j.scitotenv.2021.150399
发表时间：
2022
期刊：
The Science of the total environment
影响因子：
--
作者：
Hollands C
通讯作者：
Hollands C
影响因子：
2.2
作者：
Woodall, C. W.;Evans, D. M.;D'Amato, A. W.
通讯作者：
D'Amato, A. W.