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Foliar trait contrasts between African forest and savanna trees: genetic versus environmental effects

Schrodt, Franziska; Domingues, Tomas F.; Feldpausch, Ted R.; Saiz, Gustavo; Quesada, Carlos Alberto; Schwarz, Michael; Ishida, F. Yoko; Compaore, Halidou; Diallo, Adamo; Djagbletey, Gloria; Hien, Fidele; Sonké, Bonaventure; Toedoumg, Herman; Zapfack, Loius; Hiernaux, Pierre; Mougin, Eric; Bird, Michael. I.; Grace, John; Lewis, Simon L.; Veenendaal, Elmar M.; Lloyd, Jon

Authors

Tomas F. Domingues

Ted R. Feldpausch

Gustavo Saiz

Carlos Alberto Quesada

Michael Schwarz

F. Yoko Ishida

Halidou Compaore

Adamo Diallo

Gloria Djagbletey

Fidele Hien

Bonaventure Sonké

Herman Toedoumg

Loius Zapfack

Pierre Hiernaux

Eric Mougin

Michael. I. Bird

John Grace

Simon L. Lewis

Elmar M. Veenendaal

Jon Lloyd



Abstract

Variations in leaf mass per unit area (Ma) and foliar concentrations of N, P, C, K, Mg and Ca were determined for 365 trees growing in 23 plots along a West African precipitation gradient ranging from 0.29 to 1.62 m a–1. Contrary to previous studies, no marked increase in Ma with declining precipitation was observed, but savanna tree foliar [N] tended to be higher at the drier sites (mass basis). Generally, Ma was slightly higher and [N] slightly lower for forest vs savanna trees with most of this difference attributable to differences in soil chemistry. No systematic variations in [P], [Mg] and [Ca] with precipitation or between trees of forest vs savanna stands were observed. We did, however, find a marked increase in foliar [K] of savanna trees as precipitation declined, with savanna trees also having a significantly lower [K] than those of nearby forest. These differences were not related to differences in soil nutrient status and were accompanied by systematic changes in [C] of opposite sign. We suggest an important but as yet unidentified role for K in the adaption of savanna species to periods of limited water availability; with foliar [K] being also an important factor differentiating tree species adapted to forest vs savanna soils within the ‘zone of transition’ of Western Africa.

Journal Article Type Article
Publication Date Nov 6, 2014
Journal Functional Plant Biology
Print ISSN 1445-4408
Electronic ISSN 1445-4416
Publisher CSIRO Publishing
Peer Reviewed Peer Reviewed
Volume 42
Issue 1
Pages 63-83
APA6 Citation Schrodt, F., Domingues, T. F., Feldpausch, T. R., Saiz, G., Quesada, C. A., Schwarz, M., …Lloyd, J. (2014). Foliar trait contrasts between African forest and savanna trees: genetic versus environmental effects. Functional Plant Biology, 42(1), 63-83. https://doi.org/10.1071/fp14040
DOI https://doi.org/10.1071/fp14040
Keywords Agronomy and Crop Science; Plant Science
Publisher URL http://www.publish.csiro.au/fp/FP14040

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