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改善菲律宾红树林的土壤碳估计,使用局部有机物质对有机碳方程进行测量

Severino G Salmo¹, Sean Paul B Manalo², Precious B Jacob²

¹Institute of Biology, University of the Philippines Diliman, 1101, Quezon City, Philippines. sgsalmo@up.edu.ph.

Carbon balance and management

|September 11, 2024

概括

一个新的局部化方程式通过准确地将土壤有机物 (OM) 转换为有机碳 (OC) 来改善菲律宾的红树林土壤碳库存 (SCS) 估计. 这提高了碳减排目标和国家自主贡献 (NDC) 的准确性.

科学领域:

环境科学环境科学
海洋生物学海洋生物学
碳封存是一种碳封存技术.

背景情况:

东南亚的红树林是重要的蓝色碳热点,对全球碳循环至关重要.
准确测量红树林土壤碳库存 (SCS) 对于减缓气候变化战略至关重要.
使用点火损失 (LOI) 估计SCS的现有方法依赖于非特定于当地条件的转换方程,导致不准确.

研究的目的:

开发和验证菲律宾红树林的局部有机物-有机碳 (OM-OC) 转换方程.
与传统方法相比,评估本地化方程在估计SCS时的准确性.
提高国家气候承诺碳排放减少目标的可靠性.

主要方法:

收集了来自东部明道罗和菲律宾索索贡的各种红树林种群 (自然,恢复,重新殖民) 的土壤样本.
使用燃烧损失 (LOI) 和使用元素分析仪的有机碳 (OC) 确定土壤有机物质 (OM).
通过回归%OC与%OM并统计分析不同台型和年龄的OM:OC比率,开发了局部化的OM-OC转换方程.

主要成果:

生成了局部化转换方程 (%OC = 0.36 * %LOI + 2.40,R2 = 0.67),比传统方程更准确.
根据红树林种群类型,自然种群和恢复/重新殖民种群的年龄,观察到OM:OC比率的显著差异.
本地化方程导致SCS估计与元素分析仪值密切匹配,而常规方程高估了SCS的20%.

结论:

局部化的OM-OC转换方程显著提高了菲律宾红树林中SCS测量的准确性.
开发的本地化和站点特定方程提供了比传统的帕劳衍生方程更现实的SCS估计.
从局部方程中获得的准确的SCS数据对于设定可实现的碳减排目标和支持"巴黎协定"下的国家气候目标至关重要.

关键词:

碳库存估计碳库存估计保护保护保护保护在点火时的损失.有机物到有机碳二元测法菲律宾的红树林恢复恢复恢复恢复土壤有机碳土壤有机碳

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相关概念视频

The Carbon Cycle

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.