Forest Carbon Storage Trends along Altitudinal Gradients in Beijing, China
Forest Carbon Storage Trends along Altitudinal Gradients in Beijing, China
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DOI：
10.5814/j.issn.1674-764x.2014.02.007
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Xiao Yu;An Kai;Yang Yang-Yang;Xie Gaodi;Chunxia Lu
中科院分区：
文献类型：
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作者：
Xiao Yu;An Kai;Yang Yang-Yang;Xie Gaodi;Chunxia Lu
摘要：在北京等中国城市地区，人口和国内生产总值的快速增长导致了化石燃料产生的大量二氧化碳排放。森林被认为是抵消这些碳排放的最重要的碳汇。在本研究中，我们利用森林资源清查数据和生物量膨胀系数法估算了北京地区的森林碳储量。我们分析了森林生态系统的趋势及其沿海拔梯度的分布。结果表明，阔叶林是北京主要的森林碳库，森林碳主要储存在海拔60ma.s.l以下的平原地区。在海拔60-600米的低山区。北京地区森林生态系统碳密度随海拔梯度的增加而增加，但在海拔200-400ma.s.l范围内略有下降。海拔60米的平原地区森林植被碳密度。比其他地区高得多，这是由于杨树人工林比例高所致。华北落叶松具有较高的植被碳密度，人类的施肥、灌溉等措施有利于植被碳的积累。北京森林土壤碳密度也随海拔升高而增加，其原因是土壤碳输出量随海拔升高而降低。林下耕作、灌溉、施肥和耕作等管理措施直接加速了土壤异养呼吸的碳排放，这种碳排放随着海拔的升高而减少。200-800平方英里范围内的土壤侵蚀。随着管理实践的减少，也会随着海拔的升高而减少。这项研究将为当地森林管理者提供科学知识，以采取更适当的做法来保护森林生态系统和改善森林碳储存。
Abstract: Rapid growth in population and gross domestic product in Chinese urban regions such as Beijing has resulted in a large amount of CO2 emissions from fossil fuels. Forests are considered the most important carbon sink to offset these carbon emissions. In this study we estimated forest carbon storage in Beijing using forest inventory data and the biomass expansion factors method. We analyzed trends in the forest ecosystem and its fractions along altitudinal gradients. We concluded that broad-leaved forest is the main forest carbon pool in Beijing, and forest carbon is mainly stored in plains at an altitude of <60 m a.s.l. and in the low mountainous area at an altitude of 60–600 m a.s.l. Forest ecosystem carbon density in Beijing increases with altitudinal gradients but slightly decreases in regions at altitudes that range from 200–400 m a.s.l. Forest vegetation carbon density of the plain area at an altitude of <60 m a.s.l. is much higher than other areas, attributable to the high ratios of the plantation of Populus spp. and Larix principisrupprechtii with higher vegetation carbon densities than others and human practices such as fertilization and irrigation which are beneficial for vegetation carbon accumulation. The forest soil carbon density in Beijing also increases with increasing altitude, attributable to decreasing soil carbon output with altitude. Management practices such as understory cultivation, irrigation, fertilization and scarification directly accelerate carbon emissions from soil heterotrophic respiration which decreases with altitude. Soil erosion in areas that range from 200–800 m a.s.l. also decrease with altitude as management practices decrease. This study will underpin scientific knowledge for local forest managers to adopt more appropriate practices to protect forest ecosystems and to improve forest carbon storage.