Diagnosing phosphorus limitations in natural terrestrial ecosystems in carbon cycle models
Yan Sun,Yan Sun,Shushi Peng,Daniel S. Goll,Philippe Ciais,Bertrand Guenet,Matthieu Guimberteau,Matthieu Guimberteau,Philippe Hinsinger,Ivan A. Janssens,Josep Peñuelas,Shilong Piao,Shilong Piao,Benjamin Poulter,Aurelie Violette,Xiaojuan Yang,Yi Yin,Hui Zeng +17 more
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In this paper, the amount of P need to support increases in carbon uptake by natural ecosystems using two approaches: the demand derived from changes in C stocks and (2) changes in NPP.Abstract:
Most of the Earth System Models (ESMs) project increases in net primary productivity (NPP) and terrestrial carbon (C) storage during the 21st century. Despite empirical evidence that limited availability of phosphorus (P) may limit the response of NPP to increasing atmospheric CO2, none of the ESMs used in the previous Intergovernmental Panel on Climate Change assessment accounted for P limitation. We diagnosed from ESM simulations the amount of P need to support increases in carbon uptake by natural ecosystems using two approaches: the demand derived from (1) changes in C stocks and (2) changes in NPP. The C stock-based additional P demand was estimated to range between −31 and 193 Tg P and between −89 and 262 Tg P for Representative Concentration Pathway (RCP) 2.6 and RCP8.5, respectively, with negative values indicating a P surplus. The NPP-based demand, which takes ecosystem P recycling into account, results in a significantly higher P demand of 648–1606 Tg P for RCP2.6 and 924–2110 Tg P for RCP8.5. We found that the P demand is sensitive to the turnover of P in decomposing plant material, explaining the large differences between the NPP-based demand and C stock-based demand. The discrepancy between diagnosed P demand and actual P availability (potential P deficit) depends mainly on the assumptions about availability of the different soil P forms. Overall, future P limitation strongly depends on both soil P availability and P recycling on ecosystem scale.read more
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Patterns of new versus recycled primary production in the terrestrial biosphere (Invited)
Cory C. Cleveland,Benjamin Z. Houlton,William K. Smith,Alison Marklein,Sasha C. Reed,W. J. Parton,S. Del Grosso,Steven W. Running +7 more
TL;DR: It is implied that new N inputs have the greatest capacity to fuel additional NPP by terrestrial plants, whereas low P availability may ultimately constrain NPP across much of the terrestrial biosphere.
Journal ArticleDOI
Human Perturbation of the Global Phosphorus Cycle: Changes and Consequences.
TL;DR: The importance of sustainable P supply as a control on future food security because of regional P scarcity, food demand increase and continuously P intensive food production is highlighted, implying the great need for incorporating P in models predicting the response of carbon and nitrogen cycles to global changes.
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Effects of climate on soil phosphorus cycle and availability in natural terrestrial ecosystems
Enqing Hou,Enqing Hou,Chengrong Chen,Yiqi Luo,Guoyi Zhou,Yuanwen Kuang,Yuguang Zhang,Marijke Heenan,Xiankai Lu,Dazhi Wen +9 more
TL;DR: Overall, soil available P, indexed by Hedley labile inorganic P fraction, significantly decreased with increasing mean annual temperature (MAT) and precipitation (MAP), suggesting that temperature and precipitation have contrasting effects on soil P availability and can interact with soil particle size to control soil Pavailability.
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Anthropogenic global shifts in biospheric N and P concentrations and ratios and their impacts on biodiversity, ecosystem productivity, food security, and human health.
Josep Peñuelas,Josep Peñuelas,Ivan A. Janssens,Philippe Ciais,Michael Obersteiner,Jordi Sardans,Jordi Sardans +6 more
TL;DR: A mass-balance approach found that the combined limited availability of P and N was likely to reduce C storage by natural ecosystems during the remainder of the 21st Century, and projected crop yields indicated an increase in nutrient deficiency in developing regions if access to P fertilizer is limited.
Journal ArticleDOI
Long‐term nitrogen loading alleviates phosphorus limitation in terrestrial ecosystems
Ji Chen,Kees Jan van Groenigen,Bruce A. Hungate,César Terrer,Jan Willem van Groenigen,Fernando T. Maestre,Samantha C. Ying,Yiqi Luo,Uffe Jørgensen,Robert L. Sinsabaugh,Jørgen E. Olesen,Lars Elsgaard +11 more
TL;DR: It is shown, using a meta-analysis of 140 studies and 668 observations worldwide, that N stimulation of soil phosphatase activity diminishes over time, and increases in terrestrial carbon uptake due to ongoing anthropogenic N loading may be greater than previously thought.
References
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