Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14722 |
Anthropogenic nitrogen enrichment enhances soil carbon accumulation by impacting saprotrophs rather than ectomycorrhizal fungal activity | |
Maaroufi, Nadia, I1,2,3; Nordin, Annika4; Palmqvist, Kristin5; Hasselquist, Niles J.2; Forsmark, Benjamin2; Rosenstock, Nicholas P.6; Wallander, Hakan7; Gundale, Michael J.2 | |
2019-07-10 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:9页码:2900-2914 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Sweden |
英文摘要 | There is evidence that anthropogenic nitrogen (N) deposition enhances carbon (C) sequestration in boreal forest soils. However, it is unclear how free-living saprotrophs (bacteria and fungi, SAP) and ectomycorrhizal (EM) fungi responses to N addition impact soil C dynamics. Our aim was to investigate how SAP and EM communities are impacted by N enrichment and to estimate whether these changes influence decay of litter and humus. We conducted a long-term experiment in northern Sweden, maintained since 2004, consisting of ambient, low N additions (0, 3, 6, and 12 kg N ha(-1) year(-1)) simulating current N deposition rates in the boreal region, as well as a high N addition (50 kg N ha(-1) year(-1)). Our data showed that long-term N enrichment impeded mass loss of litter, but not of humus, and only in response to the highest N addition treatment. Furthermore, our data showed that EM fungi reduced the mass of N and P in both substrates during the incubation period compared to when only SAP organisms were present. Low N additions had no effect on microbial community structure, while the high N addition decreased fungal and bacterial biomasses and altered EM fungi and SAP community composition. Actinomycetes were the only bacterial SAP to show increased biomass in response to the highest N addition. These results provide a mechanistic understanding of how anthropogenic N enrichment can influence soil C accumulation rates and suggest that current N deposition rates in the boreal region (<= 12 kg N ha(-1) year(-1)) are likely to have a minor impact on the soil microbial community and the decomposition of humus and litter. |
英文关键词 | carbon sequestration ecological stoichiometry Gadgil effect high-throughput sequencing ingrowth mesh bags ITS amplicons litter decomposition root exclosure soil organic matter |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477200000001 |
WOS关键词 | MICROBIAL COMMUNITY COMPOSITION ; ORGANIC-MATTER ; LITTER DECOMPOSITION ; MYCORRHIZAL FUNGI ; SPOROCARP PRODUCTION ; EXTERNAL MYCELIUM ; FOREST ; DEPOSITION ; ADDITIONS ; BIOMASS |
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/184938 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Bern, Inst Plant Sci, CH-3013 Bern, Switzerland; 2.Swedish Univ Agr Sci, Dept Forest Ecol & Management, Umea, Sweden; 3.Swedish Univ Agr Sci, BioCtr, Dept Forest Mycol & Plant Pathol, Uppsala, Sweden; 4.Swedish Univ Agr Sci, Umea Plant Sci Ctr, Dept Forest Genet & Plant Physiol, Umea, Sweden; 5.Umea Univ, Dept Ecol & Environm Sci, Umea, Sweden; 6.Lund Univ, Ctr Environm & Climate Res, Lund, Sweden; 7.Lund Univ, Dept Microbial Ecol, Lund, Sweden |
推荐引用方式 GB/T 7714 | Maaroufi, Nadia, I,Nordin, Annika,Palmqvist, Kristin,et al. Anthropogenic nitrogen enrichment enhances soil carbon accumulation by impacting saprotrophs rather than ectomycorrhizal fungal activity[J]. GLOBAL CHANGE BIOLOGY,2019,25(9):2900-2914. |
APA | Maaroufi, Nadia, I.,Nordin, Annika.,Palmqvist, Kristin.,Hasselquist, Niles J..,Forsmark, Benjamin.,...&Gundale, Michael J..(2019).Anthropogenic nitrogen enrichment enhances soil carbon accumulation by impacting saprotrophs rather than ectomycorrhizal fungal activity.GLOBAL CHANGE BIOLOGY,25(9),2900-2914. |
MLA | Maaroufi, Nadia, I,et al."Anthropogenic nitrogen enrichment enhances soil carbon accumulation by impacting saprotrophs rather than ectomycorrhizal fungal activity".GLOBAL CHANGE BIOLOGY 25.9(2019):2900-2914. |
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