Carbon accumulation along a stand development sequence of Nothofagus antarctica forests across a gradient in site quality in Southern Patagonia

Above- and below-ground C pools were measured in pure even-aged stands of Nothofagus antarctica (Forster f.) Oersted at different ages (5–220 years), crown and site classes in the Patagonian region. Mean tissue C concentration varied from 46.3% in medium sized roots of dominant trees to 56.1% in rotten wood for trees grown in low quality sites. Total C concentration was in the order of: heartwood > rotten wood > sapwood > bark > small branches > coarse roots > leaves > medium roots > fine roots. Crown classes and site quality also affected the moment of maximum C accumulation, e.g. dominant trees growing on the worse site quality sequestered 0.73 kg C tree−1 year−1 at 139 years compared to the best site where 1.44 kg C tree−1 year−1 at 116 years was sequestered. C root/shoot ratio decreased over time from a maximum value of 1.3–2.2 at 5 years to a steady-state asymptote of 0.3–0.7 beyond 60 years of age depending on site quality. Total stand C content ranged from 128.0 to 350.9 Mg C ha−1, where the soil C pool represented 52–73% of total ecosystem C depending on age and site quality. Proposed equations can be used for practical purposes such as estimating the impact of silvicultural practices (e.g. thinning or silvopastoral systems) on forest C storage or evaluating the development of both above- and below-ground C over the forest life cycle for different site qualities for accurate quantification of C pools at regional scale.

Bibliographic Details

Main Authors:	104505 Peri, Pablo L. INTA EEA-Santa Cruz. UNPA, 70830 Gargaglione, Verónica (autor/a) INTA EEA-Santa Cruz. UNPA, 91139 Martínez Pastur, Guillermo (autor/a) Centro Austral de Investigaciones Científicas (CADIC), 86067 Lencinas, María Vanesa (autor/a) Centro Austral de Investigaciones Cientifícas (CADIC)
Format:	Texto biblioteca
Language:	eng
Published:	Amsterdam Elsevier 2010
Subjects:	NOTHOFAGUS ANTARCTICA, CARBONO, ALMACENAMIENTO, MODELOS, MEDICION, RAICES, ARBOLES, SECUESTRO DE CARBONO, INVENTARIOS FORESTALES, SISTEMAS SILVOPASCICOLAS, ECUACIONES ALOMETRICAS, BIOMASA AEREA, BIOMASA ABAJO DEL SUELO, AGRICULTURA, CARBON, STORAGE, MODELS, MEASUREMENT, ROOTS, TREES, FOREST INVENTORIES, SILVOPASTORAL SYSTEMS, BIOMASS, FORESTS,
Online Access:	http://orton.catie.ac.cr/repdoc/A11179i/A11179i.pdf https://www.sciencedirect.com/science/article/abs/pii/S0378112710002318
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