Modeling climate change effects on soil respiration in three different stages of primary succession in deglaciated region on Gongga Mountain, China
Primary succession in deglaciated region is the ideal environment for examining soil respiration (SR). In this study, we measured SR and employed a process-oriented model, Forest-denitrification-decomposition (DNDC), to study responses of SR to climate change in three primary successional
stages in deglaciated region on Gongga Mountain, China. Stand types included a hardwood stand (S1), a coniferous and broad-leaved mixed forest stand (S2), and a mature stand of Abies fabri (Mast.) Craib (S3). Four climate scenarios (Baseline, B1, A1B, A2) reported by the Intergovernmental
Panel on Climate Change were investigated. According to measured values, there was substantial temporal variation (coefficient of variation ranged from 49.7% in S1 to 61.4% in S3) and spatial variation (annual SR ranged from 2657±944 kg C ha−1 in S1 to 9228±1743
kg C ha−1 in S3) in the data. The modeled results showed that climate change affected the different stages to different extent in this region. Climate change will weaken the carbon sink strength of forest ecosystems in deglaciated region. The results have provided a better
understanding on patterns of SR, and provided useful information on the magnitude and the response of SR to climate change in deglaciated region.
Keywords: Climate change; forest-DNDC; glacier; primary succession; soil respiration
Document Type: Research Article
Affiliations: Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu, China
Publication date: 01 June 2013
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