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在有机土壤湿地类型中,地面和地下的碳库存,考虑到泥炭浴度

Jean-Olivier Goyette¹, Audréanne Loiselle², Poliana Mendes³

¹Département de phytologie, Université Laval, Québec, QC, Canada; Institut de recherche en biologie végétale, Université de Montréal, Montréal, QC, Canada; Quebec Centre for Biodiversity Science, McGill University, Montréal, QC, Canada.

The Science of the total environment

|June 23, 2024

概括

湿地储存大量的碳,但准确的估计需要考虑泥炭深度和湿地类型. 忽视泥炭浴度可以使土壤碳高估20-38%,影响保护计划.

科学领域:

生态生态学生态生态学
环境科学环境科学
气候变化科学气候变化科学

背景情况:

湿地对于碳捕获和气候变化缓解至关重要.
湿地类型和区间之间的碳库存的变化需要进一步研究.
泥炭盆地浴度通常被忽视,可能会膨胀土壤碳估计.

研究的目的:

量化加拿大四种湿地类型的地面和地下有机碳库存.
评估泥炭浴度对碳库存估计的影响.
通过了解碳变化,为区域湿地保护规划提供信息.

主要方法:

从加拿大东南部的57个湿地采集植被和土壤样本.
在露天沼泽,,沼泽和森林泥炭地中碳库存的表征.
碳储量计算与或没有泥炭浴度数据的比较.

主要成果:

由于盆地形状,泥炭厚度和土壤有机碳 (SOC) 在地点内显著变化.
除了浴度,SOC的平均高估值为20-38%,有些地点高达200%的高估值.
地下碳库存因湿地类型而有所不同 (沼泽: 132,: 101,沼泽: 19,森林泥炭地: 44 公斤 C m−2).
地表碳占沼泽地区总碳库存的30%,森林泥炭地占总碳库存的15%.
沼泽和森林泥炭地,尽管密度较低,但由于景观丰富而占据主导区域碳库存.
所有研究的湿地类型储存的碳每面积比森林多2-7倍.

结论:

准确的湿地碳库评估需要整合泥炭水度,并考虑湿地类型.
区域碳储存受到湿地的分布和类型的重大影响.
改善湿地碳库存数据可以加强区域保护和气候变化缓解战略.

关键词:

碳封存是一种碳封存方式.气候气候气候气候气候保护计划中的保护计划.泥炭泥炭在这里土壤土壤土壤.温带森林是一个温带森林.

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The Carbon Cycle

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.

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Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components: