Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13804 |
Experimentally increased nutrient availability at the permafrost thaw front selectively enhances biomass production of deep-rooting subarctic peatland species | |
Keuper, Frida1,2,3; Dorrepaal, Ellen1,2; van Bodegom, Peter M.1,4; van Logtestijn, Richard1; Venhuizen, Gemma1; van Hal, Jurgen1; Aerts, Rien1 | |
2017-10-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | Netherlands; Sweden; France |
英文摘要 | Climate warming increases nitrogen (N) mineralization in superficial soil layers (the dominant rooting zone) of subarctic peatlands. Thawing and subsequent mineralization of permafrost increases plant-available N around the thaw-front. Because plant production in these peatlands is N-limited, such changes may substantially affect net primary production and species composition. We aimed to identify the potential impact of increased N-availability due to permafrost thawing on subarctic peatland plant production and species performance, relative to the impact of increased N-availability in superficial organic layers. Therefore, we investigated whether plant roots are present at the thaw-front (45 cm depth) and whether N-uptake (N-15-tracer) at the thaw-front occurs during maximum thaw-depth, coinciding with the end of the growing season. Moreover, we performed a unique 3-year belowground fertilization experiment with fully factorial combinations of deep-(thaw-front) and shallow-fertilization (10 cm depth) and controls. We found that certain species are present with roots at the thaw-front (Rubus chamaemorus) and have the capacity (R. chamaemorus, Eriophorum vaginatum) for N-uptake from the thaw-front between autumn and spring when aboveground tissue is largely senescent. In response to 3-year shallow-belowground fertilization (S) both shallow-(Empetrum hermaphroditum) and deep-rooting species increased aboveground biomass and N-content, but only deep-rooting species responded positively to enhanced nutrient supply at the thaw-front (D). Moreover, the effects of shallow-fertilization and thaw-front fertilization on aboveground biomass production of the deep-rooting species were similar in magnitude (S: 71%; D: 111% increase compared to control) and additive (S + D: 181% increase). Our results show that plant-available N released from thawing permafrost can form a thus far overlooked additional N-source for deep-rooting subarctic plant species and increase their biomass production beyond the already established impact of warming-driven enhanced shallow N-mineralization. This may result in shifts in plant community composition and may partially counteract the increased carbon losses from thawing permafrost. |
英文关键词 | belowground nitrogen climate change Empetrum hermaphroditum fertilization frozen soil permafrost thaw root uptake Rubus chamaemorus |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410642100024 |
WOS关键词 | SIMULATED ENVIRONMENTAL-CHANGE ; NITROGEN DYNAMICS ; FIELD EXPERIMENTS ; BIOLOGICAL FLORA ; NORTHERN SWEDEN ; ALASKAN TUNDRA ; TUSSOCK TUNDRA ; BRITISH-ISLES ; GLOBAL CHANGE ; PLANT-GROWTH |
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/17016 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Vrije Univ Amsterdam, Dept Ecol Sci, Syst Ecol, Amsterdam, Netherlands; 2.Umea Univ, Climate Impacts Res Ctr, Dept Ecol & Environm Sci, Abisko, Sweden; 3.INRA, AgroImpact UR1158, Barenton Bugny, France; 4.Leiden Univ, Inst Environm Sci, Leiden, Netherlands |
推荐引用方式 GB/T 7714 | Keuper, Frida,Dorrepaal, Ellen,van Bodegom, Peter M.,et al. Experimentally increased nutrient availability at the permafrost thaw front selectively enhances biomass production of deep-rooting subarctic peatland species[J]. GLOBAL CHANGE BIOLOGY,2017,23(10). |
APA | Keuper, Frida.,Dorrepaal, Ellen.,van Bodegom, Peter M..,van Logtestijn, Richard.,Venhuizen, Gemma.,...&Aerts, Rien.(2017).Experimentally increased nutrient availability at the permafrost thaw front selectively enhances biomass production of deep-rooting subarctic peatland species.GLOBAL CHANGE BIOLOGY,23(10). |
MLA | Keuper, Frida,et al."Experimentally increased nutrient availability at the permafrost thaw front selectively enhances biomass production of deep-rooting subarctic peatland species".GLOBAL CHANGE BIOLOGY 23.10(2017). |
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