Age-related and stand-wise estimates of carbon stocks and sequestration in the aboveground coarse wood biomass of wetland forests in the northern Pantanal, Brazil
Age-related and stand-wise estimates of carbon stocks and sequestration in the aboveground coarse wood biomass of wetland forests in the northern Pantanal, Brazil
复制标题
巴西潘塔纳尔湿地北部湿地森林地上粗木生物量的碳储量和固存的年龄相关估计
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
C. N. Cunha
中科院分区：
文献类型：
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作者：
J. Schöngart;J. Arieira;C. F. Fortes;E. C. D. Arruda;C. N. Cunha
摘要。在这项研究中，我们利用异速生长模型结合树木年轮分析估算了位于南美洲中部潘塔纳尔湿地森林地上粗木材生物量（AGWB）的碳储量和固碳量。在4个1公顷样地中，以先导树种扬子江（Vochysia divergens Pohl, Vochysiaceae）为特征，利用3个独立参数（D、树高H和木材密度ρ），通过2个异速生长模型进行了森林清查（树胸径≥10 cm， D），并将其转换为AGWB估算值。我们执行测量误差的传播来估计AGWB估计中的不确定性。4个林分的AGWB碳储量变化范围为7.8±1.5 ~ 97.2±14.4 Mg C ha−1。从由树木年代学技术确定的树龄与AGWB中碳储量相关的模型中，我们得出了碳固存的估计值，其范围从0.50±0.03到3.34±0.31 Mg C ha - 1 yr - 1。基于地质统计技术的地图显示了4个研究林分的树龄和碳储量的空间分布不均。这种分布是由于在潘塔纳尔地区，分别与多年湿期和干期有关的V. divergens和其他物种的定殖和撤退造成的森林动态的结果。这些信息对于潘塔纳尔湿地文化景观的管理至关重要。
Abstract. In this study we use allometric models combined with tree ring analysis to estimate carbon stocks and sequestration in the aboveground coarse wood biomass (AGWB) of wetland forests in the Pantanal, located in central South America. In four 1-ha plots in stands characterized by the pioneer tree species Vochysia divergens Pohl (Vochysiaceae) forest inventories (trees ≥10 cm diameter at breast height, D) have been performed and converted to estimates of AGWB by two allometric models using three independent parameters (D, tree height H and wood density ρ). We perform a propagation of measurement errors to estimate uncertainties in the estimates of AGWB. Carbon stocks of AGWB vary from 7.8 ± 1.5 to 97.2 ± 14.4 Mg C ha−1 between the four stands. From models relating tree ages determined by dendrochronological techniques to C-stocks in AGWB we derived estimates for C-sequestration which differs from 0.50 ± 0.03 to 3.34 ± 0.31 Mg C ha−1 yr−1. Maps based on geostatistic techniques indicate the heterogeneous spatial distribution of tree ages and C-stocks of the four studied stands. This distribution is the result of forest dynamics due to the colonizing and retreating of V. divergens and other species associated with pluriannual wet and dry episodes in the Pantanal, respectively. Such information is essential for the management of the cultural landscape of the Pantanal wetlands.