Use este identificador para citar ou linkar para este item: http://repositorio.inpa.gov.br/handle/123/1811
Título: Foliar trait contrasts between African forest and savanna trees: genetic versus environmental effects
Autor(es): SCHRODT, FRANZISKA
DOMINGUES, TOMAS F.
FELDPAUSCH, TED R.
SAIZ, GUSTAVO
Carlos Alberto Nobre Quesada
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
ISSN: 1445-4408
Revista: Functional Plant Biology
Volume: 42
Resumo: Variations in leaf mass per unit area (M-a) 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 M-a with declining precipitation was observed, but savanna tree foliar [N] tended to be higher at the drier sites (mass basis). Generally, M-a 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.
URI: http://repositorio.inpa.gov.br/handle/123/1811
ISSN: 1445-4408
DOI: https://dx.doi.org/10.1071/fp14040
Aparece nas coleções:Coordenação de Dinâmica Ambiental (CDAM)

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