Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14770 |
Anthropogenic N deposition alters soil organic matter biochemistry and microbial communities on decaying fine roots | |
Argiroff, William A.1; Zak, Donald R.1,2; Upchurch, Rima A.1; Salley, Sydney O.1; Grandy, A. Stuart3 | |
2019-08-14 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA |
英文摘要 | Fine root litter is a primary source of soil organic matter (SOM), which is a globally important pool of C that is responsive to climate change. We previously established that similar to 20 years of experimental nitrogen (N) deposition has slowed fine root decay and increased the storage of soil carbon (C; +18%) across a widespread northern hardwood forest ecosystem. However, the microbial mechanisms that have directly slowed fine root decay are unknown. Here, we show that experimental N deposition has decreased the relative abundance of Agaricales fungi (-31%) and increased that of partially ligninolytic Actinobacteria (+24%) on decaying fine roots. Moreover, experimental N deposition has increased the relative abundance of lignin-derived compounds residing in SOM (+53%), and this biochemical response is significantly related to shifts in both fungal and bacterial community composition. Specifically, the accumulation of lignin-derived compounds in SOM is negatively related to the relative abundance of ligninolytic Mycena and Kuehneromyces fungi, and positively related to Microbacteriaceae. Our findings suggest that by altering the composition of microbial communities on decaying fine roots such that their capacity for lignin degradation is reduced, experimental N deposition has slowed fine root litter decay, and increased the contribution of lignin-derived compounds from fine roots to SOM. The microbial responses we observed may explain widespread findings that anthropogenic N deposition increases soil C storage in terrestrial ecosystems. More broadly, our findings directly link composition to function in soil microbial communities, and implicate compositional shifts in mediating biogeochemical processes of global significance. |
英文关键词 | bacterial community biogeochemical feedback fungal community lignin microbial decomposition root decay soil carbon |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000480981000001 |
WOS关键词 | ATMOSPHERIC NO3-DEPOSITION ; NITROGEN DEPOSITION ; FUNGAL COMMUNITY ; LEAF-LITTER ; LIGNIN DEGRADATION ; ENZYME-ACTIVITIES ; CARBON STORAGE ; DECOMPOSITION ; IDENTIFICATION ; RESPIRATION |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/185969 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Michigan, Sch Environm & Sustainabil, Ann Arbor, MI 48109 USA; 2.Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109 USA; 3.Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA |
推荐引用方式 GB/T 7714 | Argiroff, William A.,Zak, Donald R.,Upchurch, Rima A.,et al. Anthropogenic N deposition alters soil organic matter biochemistry and microbial communities on decaying fine roots[J]. GLOBAL CHANGE BIOLOGY,2019. |
APA | Argiroff, William A.,Zak, Donald R.,Upchurch, Rima A.,Salley, Sydney O.,&Grandy, A. Stuart.(2019).Anthropogenic N deposition alters soil organic matter biochemistry and microbial communities on decaying fine roots.GLOBAL CHANGE BIOLOGY. |
MLA | Argiroff, William A.,et al."Anthropogenic N deposition alters soil organic matter biochemistry and microbial communities on decaying fine roots".GLOBAL CHANGE BIOLOGY (2019). |
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