Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2018.01.042 |
Decomposition of trembling aspen leaf litter under long-term nitrogen and sulfur deposition: Effects of litter chemistry and forest floor microbial properties | |
Wang, Qi1; Kwak, Jin-Hyeob1; Choi, Woo-Jung2; Chang, Scott X.1 | |
2018-03-15 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT |
ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2018 |
卷号 | 412页码:53-61 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; South Korea |
英文摘要 | Litter decomposition rates are affected by abiotic and biotic factors such as climate, soil physico-chemical properties, litter chemistry, nitrogen (N) availability, and activities of soil organisms. Elevated N and sulfur (S) deposition originated from oil sands mining and upgrading activities can change soil microbial properties, litter chemistry, and litter decomposition rates in the surrounding forest ecosystems in northern Alberta. We studied (1) the effect of long-term N and S deposition on litter chemistry and soil microbial properties, and (2) the effect of changed litter chemistry and soil microbial properties on litter decomposition (CO2 emission) in a 100-day laboratory incubation experiment using trembling aspen (Poplins tremuloides)leaf litter and forest floor collected from a mixedwood boreal forest that has been subject to simulated N and S deposition for 10 years. Litter chemistry (lignin, total carbon (C) and N, and calcium (Ca), aluminum (Al), manganese (Mn), and magnesium (Mg) concentration) and forest floor microbial properties (microbial biomass C and N, and extracellular enzyme activities) were analyzed. Ten years of N and S addition increased N (P < .05 unless otherwise stated) and decreased lignin concentrations resulting in lower C/N and lignin/N ratios in the litter. In addition, N and S addition increased forest floor microbial biomass (P < .01) and enzyme activities. Cumulative CO2 emission (C-cum) from litter was greater from the N and/or S addition treatments than that from the control, probably due to decreased C/N and lignin/N ratios in litter from the N and S addition treatments; meanwhile, C-cum from litter was not affected by soil microbial activity. The results indicate that N and S deposition enhances decomposition of aspen leaf litter by decreasing C/N and lignin/N ratios, suggesting that long-term exposure to high levels of N and S deposition can significantly change C (and associated nutrients) cycling in forest ecosystems in the oil sands region. |
英文关键词 | Atmospheric deposition Boreal forest Carbon to nitrogen ratio Combined nitrogen and sulfur addition Enzyme activity Lignin to nitrogen ratio Microbial biomass |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427667700006 |
WOS关键词 | OIL SANDS REGION ; DISSOLVED ORGANIC-CARBON ; SOIL RESPIRATION ; ENZYME-ACTIVITY ; BOREAL FOREST ; S DEPOSITIONS ; SIMULATED N ; ACID-RAIN ; BIOMASS ; ALBERTA |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/23658 |
专题 | 气候变化 |
作者单位 | 1.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada; 2.Chonnam Natl Univ, Dept Rural & Biosyst Engn, Gwangju 61186, South Korea |
推荐引用方式 GB/T 7714 | Wang, Qi,Kwak, Jin-Hyeob,Choi, Woo-Jung,et al. Decomposition of trembling aspen leaf litter under long-term nitrogen and sulfur deposition: Effects of litter chemistry and forest floor microbial properties[J]. FOREST ECOLOGY AND MANAGEMENT,2018,412:53-61. |
APA | Wang, Qi,Kwak, Jin-Hyeob,Choi, Woo-Jung,&Chang, Scott X..(2018).Decomposition of trembling aspen leaf litter under long-term nitrogen and sulfur deposition: Effects of litter chemistry and forest floor microbial properties.FOREST ECOLOGY AND MANAGEMENT,412,53-61. |
MLA | Wang, Qi,et al."Decomposition of trembling aspen leaf litter under long-term nitrogen and sulfur deposition: Effects of litter chemistry and forest floor microbial properties".FOREST ECOLOGY AND MANAGEMENT 412(2018):53-61. |
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