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Inicio  /  Forest Systems  /  Vol: 26 Núm: 3 Par: 0 (2017)  /  Artículo
ARTÍCULO
TITULO

Dry weight loss in leaves of dominant species in a successional sequence of the Mesopotamian Espinal (Argentina)

Carlos A. Mendoza    
Juan F. Gallardo    
Maria B. Turrión    
Valentín Pando    
Pablo G. Aceñolaza    

Resumen

Aim of study: To compare litter decomposition dynamics among different species within a single forest type and also between a single species in different forest successional stages.Area of study: Different forests of a known successional sequence of the Mesopotamian Espinal, placed in Villaguay Department, Entre Ríos Province, Argentina.Material and methods: A standard ?litter bags? technique was employed. Chemical analyses of C and N were performed for leaves. A regression analysis was applied and data were fitted to a double exponential model. Means estimated among forests and species within each forest were compared using the Tukey-Kramer test.Main results: The model predicted that leaves would completely mineralize in the mid-term. Leaf decomposition rate in different species (both in the Secondary forest and Mature forest) had dry matter residues in the following decreasing order: Acacia caven > Prosopis nigra > Prosopis affinis > Celtis ehrenbergiana. Research highlights: Successional stage was not found to be a factor determining the decomposition rate among species. Different decomposition rates, observed among different species, would not be attributed to initial quality of residues in terms of C and N, but would be associated with a positive feedback process related to nutrient cycle; thus, a greater decomposition would increase nutrient availability and, consequently, litterfall input.

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