Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15131 |
Drought and recovery effects on belowground respiration dynamics and the partitioning of recent carbon in managed and abandoned grassland | |
Johannes Ingrisch; Stefan Karlowky; Roland Hasibeder; Gerd Gleixner; Michael Bahn | |
2020-05-27 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | The supply of soil respiration with recent photoassimilates is an important and fast pathway for respiratory loss of carbon (C). To date it is unknown how drought and land‐use change interactively influence the dynamics of recent C in soil‐respired CO2. In an in situ common‐garden experiment, we exposed soil‐vegetation monoliths from a managed and a nearby abandoned mountain grassland to an experimental drought. Based on two 13CO2 pulse‐labelling campaigns, we traced recently assimilated C in soil respiration during drought, rewetting and early recovery. Independent of grassland management, drought reduced the absolute allocation of recent C to soil respiration. Rewetting triggered a respiration pulse, which was strongly fuelled by C assimilated during drought. In comparison to the managed grassland, the abandoned grassland partitioned more recent C to belowground respiration than to root C storage under ample water supply. Interestingly, this pattern was reversed under drought. We suggest that these different response patterns reflect strategies of the managed and the abandoned grassland to enhance their respective resilience to drought, by fostering their resistance and recovery respectively. We conclude that while severe drought can override the effects of abandonment of grassland management on the respiratory dynamics of recent C, abandonment alters strategies of belowground assimilate investment, with consequences for soil‐CO2 fluxes during drought and drought‐recovery. |
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/271651 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Johannes Ingrisch,Stefan Karlowky,Roland Hasibeder,et al. Drought and recovery effects on belowground respiration dynamics and the partitioning of recent carbon in managed and abandoned grassland[J]. Global Change Biology,2020. |
APA | Johannes Ingrisch,Stefan Karlowky,Roland Hasibeder,Gerd Gleixner,&Michael Bahn.(2020).Drought and recovery effects on belowground respiration dynamics and the partitioning of recent carbon in managed and abandoned grassland.Global Change Biology. |
MLA | Johannes Ingrisch,et al."Drought and recovery effects on belowground respiration dynamics and the partitioning of recent carbon in managed and abandoned grassland".Global Change Biology (2020). |
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