Stimulation of terrestrial ecosystem carbon storage by nitrogen addition: a meta-analysis
TLDR
It is suggested that N addition will increase soil C storage and plant C in both above- and below-ground parts, indicating that terrestrial ecosystems might act to strengthen as a C sink under increasing N deposition.Abstract:
Elevated nitrogen (N) deposition alters the terrestrial carbon (C) cycle, which is likely to feed back to further climate change. However, how the overall terrestrial ecosystem C pools and fluxes respond to N addition remains unclear. By synthesizing data from multiple terrestrial ecosystems, we quantified the response of C pools and fluxes to experimental N addition using a comprehensive meta-analysis method. Our results showed that N addition significantly stimulated soil total C storage by 5.82% ([2.47%, 9.27%], 95% CI, the same below) and increased the C contents of the above- and below-ground parts of plants by 25.65% [11.07%, 42.12%] and 15.93% [6.80%, 25.85%], respectively. Furthermore, N addition significantly increased aboveground net primary production by 52.38% [40.58%, 65.19%] and litterfall by 14.67% [9.24%, 20.38%] at a global scale. However, the C influx from the plant litter to the soil through litter decomposition and the efflux from the soil due to microbial respiration and soil respiration showed insignificant responses to N addition. Overall, our meta-analysis suggested that N addition will increase soil C storage and plant C in both above- and below-ground parts, indicating that terrestrial ecosystems might act to strengthen as a C sink under increasing N deposition.read more
Citations
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Forest Soil Bacteria: Diversity, Involvement in Ecosystem Processes, and Response to Global Change
TL;DR: Bacteria contribute to a range of essential soil processes involved in the cycling of carbon, nitrogen, and phosphorus, and mediate multiple critical steps in the nitrogen cycle, including N fixation.
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Increasing soil carbon storage: mechanisms, effects of agricultural practices and proxies. A review
Marie-France Dignac,Delphine Derrien,Pierre Barré,Sébastien Barot,Lauric Cécillon,Claire Chenu,Tiphaine Chevallier,Grégoire T. Freschet,Patricia Garnier,Bertrand Guenet,Mickaël Hedde,Katja Klumpp,Gwenaëlle Lashermes,Pierre-Alain Maron,Naoise Nunan,Catherine Roumet,Isabelle Basile-Doelsch +16 more
TL;DR: The CarboSMS consortium federates French researchers working on these mechanisms and their effects on C stocks in a local and global change setting (land use, agricultural practices, climatic and soil conditions, etc.). This article is a synthesis of this consortium's first seminar.
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Patterns and mechanisms of responses by soil microbial communities to nitrogen addition
TL;DR: Findings revised the previous notion that N addition inhibited the microbial growth and showed that the shifts in the F:B and GP:GN mainly resulted from enhanced N availability due to N addition rather than soil acidification.
Journal ArticleDOI
Nitrogen limitation of decomposition and decay: How can it occur?
Colin Averill,Bonnie G. Waring +1 more
TL;DR: A new conceptual framework is proposed, the Carbon, Acidity, and Mineral Protection hypothesis, to understand the effects of N availability on soil C cycling and storage and explore the predictions of this framework with a mathematical model.
Journal ArticleDOI
Effects of three global change drivers on terrestrial C:N:P stoichiometry: a global synthesis.
Kai Yue,Kai Yue,Dario A. Fornara,Wanqin Yang,Yan Peng,Zhijie Li,Fuzhong Wu,Changhui Peng,Changhui Peng +8 more
TL;DR: This study is one of the first to compare individual vs. combined effects of the three global change drivers on terrestrial C:N:P ratios using a large set of data and shows that individual effects of N addition and elevated CO2 on C: N:P stoichiometry are stronger than warming.
References
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