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International Journal of Wildland Fire International Journal of Wildland Fire Society
Journal of the International Association of Wildland Fire
RESEARCH ARTICLE

Carbon balance and fire emissions in Andean cypress (Austrocedrus chilensis) forests of Patagonia, Argentina

Guillermo Emilio Defossé A D , María Marcela Godoy B C and María Lila Bertolin B
+ Author Affiliations
- Author Affiliations

A Centro de Investigación Esquel de Montaña y Estepa Patagónica (CIEMEP - CONICET and University of Patagonia), Roca 780, Esquel, Chubut, Argentina.

B CIEFAP-CONICET, Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Ruta 259, km 4, CP (9200), Esquel, Argentina.

C Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Ruta 259, km 4, CP (9200), Esquel, Argentina.

D Corresponding author. Email: direccionciemep@comahue-conicet.gob.ar

International Journal of Wildland Fire 29(8) 661-674 https://doi.org/10.1071/WF19183
Submitted: 4 November 2019  Accepted: 14 April 2020   Published: 8 June 2020

Abstract

Wildfires are disturbances that affect forest structure and dynamics. Forests and the atmosphere interact in different ways; one is by emitting carbon (C) through wildfires and recapturing it by photosynthesis of regrowing vegetation. Estimation of C emissions and uptake allows monitoring and inventorying C at stand, landscape, or regional levels. We indirectly estimated C and other greenhouse gas emissions and uptake following Intergovernmental Panel on Climate Change (IPCC) guidelines, and also using growth curves derived from real data, in three burned pure Andean cypress (Austrocedrus chilensis) stands in Patagonia, Argentina. The sites, termed INTA (humid), LACO (mesic) and CECE (xeric), were burned on different dates (1987, INTA; 1999, CECE; 2008, LACO). Nearby unburned stands with similar structural and floristic characteristics were used as analogues to make our estimations. Carbon losses represented 245, 225, and 215 t CO2 ha−1 for CECE, INTA and LACO respectively. Amount of carbon sequestered by post-fire vegetation depended on the time-lag from fire occurrence to date of sampling, whereas C uptake rates varied in time according to differences in site environmental conditions. Andean cypress seedlings present in burned stands suggest that outside the time needed, each site may recover not only lost C but also former structure and functions.

Additional keywords: carbon losses, forest recovery, greenhouse gases, sequestered carbon.


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