Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.16035 |
Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO2, warming, and drought | |
Tania L. Maxwell; Alberto Canarini; Ivana Bogdanovic; Theresa Bö; ckle; Victoria Martin; Lisa Noll; Judith Prommer; Joana Sé; neca; Eva Simon; Hans-Peter Piepho; Markus Herndl; Erich M. Pö; tsch; Christina Kaiser; Andreas Richter; Michael Bahn; Wolfgang Wanek | |
2022-01-10 | |
发表期刊 | Global Change Biology
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出版年 | 2022 |
英文摘要 | Depolymerization of high-molecular weight organic nitrogen (N) represents the major bottleneck of soil N cycling and yet is poorly understood compared to the subsequent inorganic N processes. Given the importance of organic N cycling and the rise of global change, we investigated the responses of soil protein depolymerization and microbial amino acid consumption to increased temperature, elevated atmospheric CO2, and drought. The study was conducted in a global change facility in a managed montane grassland in Austria, where elevated CO2 (eCO2) and elevated temperature (eT) were stimulated for 4 years, and were combined with a drought event. Gross protein depolymerization and microbial amino acid consumption rates (alongside with gross organic N mineralization and nitrification) were measured using 15N isotope pool dilution techniques. Whereas eCO2 showed no individual effect, eT had distinct effects which were modulated by season, with a negative effect of eT on soil organic N process rates in spring, neutral effects in summer, and positive effects in fall. We attribute this to a combination of changes in substrate availability and seasonal temperature changes. Drought led to a doubling of organic N process rates, which returned to rates found under ambient conditions within 3 months after rewetting. Notably, we observed a shift in the control of soil protein depolymerization, from plant substrate controls under continuous environmental change drivers (eT and eCO2) to controls via microbial turnover and soil organic N availability under the pulse disturbance (drought). To the best of our knowledge, this is the first study which analyzed the individual versus combined effects of multiple global change factors and of seasonality on soil organic N processes and thereby strongly contributes to our understanding of terrestrial N cycling in a future world. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
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/345087 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Tania L. Maxwell,Alberto Canarini,Ivana Bogdanovic,et al. Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO2, warming, and drought[J]. Global Change Biology,2022. |
APA | Tania L. Maxwell.,Alberto Canarini.,Ivana Bogdanovic.,Theresa Bö.,ckle.,...&Wolfgang Wanek.(2022).Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO2, warming, and drought.Global Change Biology. |
MLA | Tania L. Maxwell,et al."Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO2, warming, and drought".Global Change Biology (2022). |
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