Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aaa4fa |
Amino acid production exceeds plant nitrogen demand in Siberian tundra | |
Wild, Birgit1,2,3,4,5; Alves, Ricardo J. Eloy2,6; Barta, Jiri7; Capek, Petr7; Gentsch, Norman8; Guggenberger, Georg8,9; Hugelius, Gustaf5,10,11; Knoltsch, Anna1,2; Kuhry, Peter10; Lashchinskiy, Nikolay12; Mikutta, Robert13; Palmtag, Juri10; Prommer, Judith1; Schnecker, Joerg1,14; Shibistova, Olga8,9; Takriti, Mounir1,2,15; Urich, Tim2,6,16; Richter, Andreas1,2 | |
2018-03-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
![]() |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Austria; Sweden; Czech Republic; Germany; Russia; USA; England |
英文摘要 | Arctic plant productivity is often limited by low soil N availability. This has been attributed to slow breakdown of N-containing polymers in litter and soil organic matter (SOM) into smaller, available units, and to shallow plant rooting constrained by permafrost and high soil moisture. Using N-15 pool dilution assays, we here quantified gross amino acid and ammonium production rates in 97 active layer samples from four sites across the Siberian Arctic. We found that amino acid production in organic layers alone exceeded literature-based estimates of maximum plant N uptake 17-fold and therefore reject the hypothesis that arctic plant N limitation results from slow SOM breakdown. High microbial N use efficiency in organic layers rather suggests strong competition of microorganisms and plants in the dominant rooting zone. Deeper horizons showed lower amino acid production rates per volume, but also lower microbial N use efficiency. Permafrost thaw together with soil drainage might facilitate deeper plant rooting and uptake of previously inaccessible subsoil N, and thereby promote plant productivity in arctic ecosystems. We conclude that changes in microbial decomposer activity, microbial N utilization and plant root density with soil depth interactively control N availability for plants in the Arctic. |
英文关键词 | permafrost tundra protein depolymerization nitrogen mineralization nitrogen limitation plant productivity |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425435300002 |
WOS关键词 | SUB-ARCTIC TUNDRA ; SOIL-NITROGEN ; ORGANIC-MATTER ; ALASKAN TUNDRA ; SPECIES COMPOSITION ; SEASONAL-VARIATION ; MICROBIAL BIOMASS ; ENZYME-ACTIVITIES ; PERMAFROST SOILS ; USE EFFICIENCY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/33218 |
专题 | 气候变化 |
作者单位 | 1.Univ Vienna, Dept Microbiol & Ecosyst Sci, Vienna, Austria; 2.Austrian Polar Res Inst, Vienna, Austria; 3.Univ Gothenburg, Dept Earth Sci, Gothenburg, Sweden; 4.Stockholm Univ, Dept Environm Sci & Analyt Chem, Stockholm, Sweden; 5.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden; 6.Univ Vienna, Dept Ecogen & Syst Biol, Vienna, Austria; 7.Univ South Bohemia, Dept Ecosyst Biol, Ceske Budejovice, Czech Republic; 8.Leibniz Univ Hannover, Inst Soil Sci, Hannover, Germany; 9.Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk, Russia; 10.Stockholm Univ, Dept Phys Geog, Stockholm, Sweden; 11.Stanford Univ, Dept Earth Sci, Stanford, CA 94305 USA; 12.Russian Acad Sci, Cent Siberian Bot Garden, Siberian Branch, Novosibirsk, Russia; 13.Martin Luther Univ Halle Wittenberg, Soil Sci & Soil Protect, Halle, Saale, Germany; 14.Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA; 15.Univ Lancaster, Lancaster Environm Ctr, Lancaster, England; 16.Ernst Moritz Arndt Univ Greifswald, Inst Microbiol, Greifswald, Germany |
推荐引用方式 GB/T 7714 | Wild, Birgit,Alves, Ricardo J. Eloy,Barta, Jiri,et al. Amino acid production exceeds plant nitrogen demand in Siberian tundra[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(3). |
APA | Wild, Birgit.,Alves, Ricardo J. Eloy.,Barta, Jiri.,Capek, Petr.,Gentsch, Norman.,...&Richter, Andreas.(2018).Amino acid production exceeds plant nitrogen demand in Siberian tundra.ENVIRONMENTAL RESEARCH LETTERS,13(3). |
MLA | Wild, Birgit,et al."Amino acid production exceeds plant nitrogen demand in Siberian tundra".ENVIRONMENTAL RESEARCH LETTERS 13.3(2018). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论