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dc.contributor.author Buendía, C
dc.contributor.author Kleidon, A
dc.contributor.author Porporato, A
dc.date.accessioned 2011-06-21T17:32:25Z
dc.date.issued 2010-07-02
dc.identifier.citation Biogeosciences, 2010, 7 (6), pp. 2025 - 2038
dc.identifier.issn 1726-4170
dc.identifier.uri http://hdl.handle.net/10161/4620
dc.description.abstract Phosphorus (P) is a crucial element for life and therefore for maintaining ecosystem productivity. Its local availability to the terrestrial biosphere results from the interaction between climate, tectonic uplift, atmospheric transport, and biotic cycling. Here we present a mathematical model that describes the terrestrial P-cycle in a simple but comprehensive way. The resulting dynamical system can be solved analytically for steady-state conditions, allowing us to test the sensitivity of the P-availability to the key parameters and processes. Given constant inputs, we find that humid ecosystems exhibit lower P availability due to higher runoff and losses, and that tectonic uplift is a fundamental constraint. In particular, we find that in humid ecosystems the biotic cycling seem essential to maintain long-term P-availability. The time-dependent P dynamics for the Franz Josef and Hawaii chronosequences show how tectonic uplift is an important constraint on ecosystem productivity, while hydroclimatic conditions control the P-losses and speed towards steady-state. The model also helps describe how, with limited uplift and atmospheric input, as in the case of the Amazon Basin, ecosystems must rely on mechanisms that enhance P-availability and retention. Our novel model has a limited number of parameters and can be easily integrated into global climate models to provide a representation of the response of the terrestrial biosphere to global change. © 2010 Author(s).
dc.format.extent 2025 - 2038
dc.language.iso en_US en_US
dc.relation.ispartof Biogeosciences
dc.relation.isversionof 10.5194/bg-7-2025-2010
dc.title The role of tectonic uplift, climate, and vegetation in the long-term terrestrial phosphorous cycle
dc.title.alternative en_US
dc.type Journal Article
dc.description.version Version of Record en_US
duke.date.pubdate 2010-00-00 en_US
duke.description.endpage 2038 en_US
duke.description.issue 6 en_US
duke.description.startpage 2025 en_US
duke.description.volume 7 en_US
dc.relation.journal Biogeosciences en_US
pubs.issue 6
pubs.organisational-group /Duke
pubs.organisational-group /Duke/Nicholas School of the Environment
pubs.organisational-group /Duke/Nicholas School of the Environment/Environmental Sciences and Policy
pubs.organisational-group /Duke/Pratt School of Engineering
pubs.organisational-group /Duke/Pratt School of Engineering/Civil and Environmental Engineering
pubs.publication-status Published
pubs.volume 7
dc.identifier.eissn 1726-4189

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