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; Sonk�, Bonaventure; Toedoumg, Herman; Zapfack, Loius; Hiernaux, Pierre; Mougin, Eric; Bird, Michael. I.; Grace, John; Lewis, Simon L.; Veenendaal, Elmar M.; Lloyd, Jon

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.

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

• Journal Article Type: Article
• Acceptance Date: Jul 9, 2014
• Online Publication Date: Nov 6, 2014
• Publication Date: Nov 6, 2014
• Deposit Date: Dec 14, 2018
• Publicly Available Date: Apr 5, 2019
• 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
• DOI: https://doi.org/10.1071/fp14040
• Keywords: Agronomy and Crop Science; Plant Science
• Public URL: https://nottingham-repository.worktribe.com/output/1415490
• Publisher URL: http://www.publish.csiro.au/fp/FP14040
• Contract Date: Apr 3, 2019