Avanzada

Trends in leaf traits, litter dynamics and associated nutrient cycling along a secondary successional chronosequence of semi-evergreen tropical forest in South-Eastern Mexico

Periodo de realización: 1900/01/01 al 2018/06/01

Tipo: Artículo científico

Lugar(es) de estudio: Calakmul, Camp., México
Resumen: "Trends in structural and chemical leaf traits along a chronosequence of semi-evergreen tropical forest andtheir correlation with litter production and decomposition and associated carbon (C) and nitrogen (N) fluxes wereassessed. Leaves of 15 dominant species in each plot were collected to measure leaf area, specific leaf area (SLA), Cand N concentration and C:N ratio. Litterfall was measured and litter decomposition experiments were set up in 16experimental plots in a chronosequence of secondary and mature forest. All five leaf traits combined discriminated thesecondary forests from mature forest. SLA, N and C:N were significantly correlated to litter decomposition rates. Litterdecomposition was significantly slower inmature forest compared with secondary forests. The N concentration of litterwas lowest during the dry season, when litterfall was highest. N concentration in fresh leaves was higher than in litter,indicating that N is re-absorbed before leaf abscission. Leaf dynamics and associated nutrient cycling differ significantlybetween secondary forests andmature forest. Ecosystem-level leaf structural and chemical traits are good predictors ofthe stage of the forest and explain well the differences in decomposition rates between secondary and primary forests."

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