Resumo

FUENTES MOLINA, NATALIA  e  RODRIGUEZ BARRIOS, JAVIER ALFREDO. Efficient Way Back Litter Nutrient Potential of a Tropical Forest Ofbank. Sierra Nevada of Santa Marta Colombia. Acta biol.Colomb. [online]. 2012, vol.17, n.1, pp.51-66. ISSN 0120-548X.

In three representative forests along the river Gaira, (subtropical wet forest, subtropical moist forest and tropical thorn mount), were measured over six months (wet and dry seasons) fluxes of nitrogen and phosphorus through the litter. Concentrations of nutrients (nitrogen and phosphorus) in the litter were relatively similar in the three Nevada de Santa Marta Colombia. Fuentes, Rodríguez. vegetation types (1.71% N and 0.12% P for the subtropical moist forest, followed by the tropical thorn mount with 1.50% N and 0.10% P and the subtropical wet forest with 1.39% N and 0.08% P), with the most significant differences found for nitrogen, which is the major nutrient with the absolute maximum in the subtropical rain forest set in the middle stretch of the basin. The greatest returns on biomass and nutrients occurred in the subtropical moist forest and tropical thorn mount set in the middle and lower reaches of the basin. The leaves showed high concentration of N and consequently, given the high production values of the different fractions, a high potential return of N ( 78.6 kg ha-1 yr-1). The foliar P concentration showed a potential return of 4.9 kgha1año-1 and high values of the indices of efficiency in their use (IEV:2888.5) and foliar resorption (ERN: 98.2), was the nutrient most limiting.

Palavras-chave : Nutrients; litterfall; riparian forest; watershed.

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