PMID: 11607734Aug 5, 1997Paper

Equilibration of the terrestrial water, nitrogen, and carbon cycles

Proceedings of the National Academy of Sciences of the United States of America
D S SchimelW J Parton

Abstract

Recent advances in biologically based ecosystem models of the coupled terrestrial, hydrological, carbon, and nutrient cycles have provided new perspectives on the terrestrial biosphere's behavior globally, over a range of time scales. We used the terrestrial ecosystem model Century to examine relationships between carbon, nitrogen, and water dynamics. The model, run to a quasi-steady-state, shows strong correlations between carbon, water, and nitrogen fluxes that lead to equilibration of water/energy and nitrogen limitation of net primary productivity. This occurs because as the water flux increases, the potentials for carbon uptake (photosynthesis), and inputs and losses of nitrogen, all increase. As the flux of carbon increases, the amount of nitrogen that can be captured into organic matter and then recycled also increases. Because most plant-available nitrogen is derived from internal recycling, this latter process is critical to sustaining high productivity in environments where water and energy are plentiful. At steady-state, water/energy and nitrogen limitation "equilibrate," but because the water, carbon, and nitrogen cycles have different response times, inclusion of nitrogen cycling into ecosystem models adds behavior...Continue Reading

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Citations

Aug 21, 2003·Journal of Environmental Management·Suzi KerrR Flint Hughes
Jul 30, 2010·Ecological Applications : a Publication of the Ecological Society of America·Leela E RaoThomas Meixner
Feb 18, 2011·The New Phytologist·Yuanhe YangAdrien C Finzi
Feb 27, 2004·Oecologia·Amy T AustinSean M Schaeffer
Mar 25, 2018·Ecological Applications : a Publication of the Ecological Society of America·Erin J HananJennifer Adam
Jan 25, 2002·Nature·Nico van Breemen
Apr 18, 2017·Ecology Letters·Philip G TaylorAlan R Townsend
Mar 20, 2021·The Science of the Total Environment·Tong ZhangShenglei Fu

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