Basin-wide variations in foliar properties of Amazonian forest: phylogeny, soils and climate

Fyllas, N.M., Patiño, S., Baker, T.R., Bielefeld Nardoto, G., Martinelli, L.A., Quesada, C.A., Paiva, R., Schwarz, M., Horna, V., Mercado, L.M., Santos, A., Arroyo, L., Jiménez, E.M., Luizão, F.J., Neill, D.A., Silva, N., Prieto, A., Rudas, A., Silviera, M., Vieira, I.C.G., Lopez-Gonzalez, G., Malhi, Y., Phillips, O.L., and Lloyd, J. (2009) Basin-wide variations in foliar properties of Amazonian forest: phylogeny, soils and climate. Biogeosciences, 6 (11). pp. 2677-2708.

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View at Publisher Website: http://dx.doi.org/10.5194/bg-6-2677-2009
 
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Abstract

We analysed 1040 individual trees, located in 62 plots across the Amazon Basin for leaf mass per unit area (MA), foliar carbon isotopic composition (δ13C) and leaf level concentrations of C, N, P, Ca, Mg, K and Al. All trees were identified to the species level with the dataset containing 58 families, 236 genera and 508 species, distributed across a wide range of soil types and precipitation regimes. Some foliar characteristics such as MA, [C], [N] and [Mg] emerge as highly constrained by the taxonomic affiliation of tree species, but with others such as [P], [K], [Ca] and δ13C also strongly influenced by site growing conditions. By removing the environmental contribution to trait variation, we find that intrinsic values of most trait pairs coordinate, although different species (characterised by different trait suites) are found at discrete locations along a common axis of coordination. Species that tend to occupy higher fertility soils are characterised by a lower MA and have a higher intrinsic [N], [P], [K], [Mg] and δ13C than their lower fertility counterparts. Despite this consistency, different scaling patterns were observed between low and high fertility sites. Inter-relationships are thus substantially modified by growth environment. Analysing the environmental component of trait variation, we found soil fertility to be the most important predictor, influencing all leaf nutrient concentrations and δ13C and reducing MA. Mean annual temperature was negatively associated with leaf level [N], [P] and [K] concentrations. Total annual precipitation positively influences MA, [C] and δ13C, but with a negative impact on [Mg]. These results provide a first basis for understanding the relationship between the physiological functioning and distribution of tree species across Amazonia.

Item ID: 17966
Item Type: Article (Refereed Research - C1)
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© Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License.

All additional supporting information found at the following link has been combined into a single PDF: http://www.biogeosciences.net/6/2677/2009/bg-6-2677-2009-supplement.zip

ISSN: 1726-4189
Date Deposited: 04 Oct 2011 04:27
FoR Codes: 06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060705 Plant Physiology @ 50%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060208 Terrestrial Ecology @ 50%
SEO Codes: 96 ENVIRONMENT > 9699 Other Environment > 969999 Environment not elsewhere classified @ 100%
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