Articles | Volume 12, issue 22
https://doi.org/10.5194/bg-12-6529-2015
https://doi.org/10.5194/bg-12-6529-2015
Research article
 | 
18 Nov 2015
Research article |  | 18 Nov 2015

Edaphic, structural and physiological contrasts across Amazon Basin forest–savanna ecotones suggest a role for potassium as a key modulator of tropical woody vegetation structure and function

J. Lloyd, T. F. Domingues, F. Schrodt, F. Y. Ishida, T. R. Feldpausch, G. Saiz, C. A. Quesada, M. Schwarz, M. Torello-Raventos, M. Gilpin, B. S. Marimon, B. H. Marimon-Junior, J. A. Ratter, J. Grace, G. B. Nardoto, E. Veenendaal, L. Arroyo, D. Villarroel, T. J. Killeen, M. Steininger, and O. L. Phillips

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (Editor review) (14 Sep 2015) by Trevor Keenan
AR by Jonathan Lloyd on behalf of the Authors (06 Oct 2015)  Author's response 
ED: Publish as is (11 Oct 2015) by Trevor Keenan
AR by Jonathan Lloyd on behalf of the Authors (11 Oct 2015)
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Short summary
Across tropical South America, forest soils are typically of a higher cation status than their savanna equivalents with soil exchangeable potassium a key soil nutrient differentiating these two vegetation types. Differences in soil water storage capacity are also important – interacting with both potassium availability and precipitation regimes in a relatively complex manner.
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