Networking our science to characterize the state, vulnerabilities, and management opportunities of soil organic matter
Networking our science to characterize the state, vulnerabilities, and management opportunities of soil organic matter
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DOI：
10.1111/gcb.13896
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发表时间：
2018-02-01
影响因子：
11.6
通讯作者：
Nave, Lucas E.
中科院分区：
文献类型：
--
作者：
Harden, Jennifer W.;Hugelius, Gustaf;Nave, Lucas E.
土壤有机质（SOM）支持地球维持陆地生态系统的能力，提供食物和纤维，并保留最大的活跃循环碳库。人类土地利用直接影响着土壤表层75%以上的有机碳。由于土地利用方式，大面积土地丧失了有机碳，但通过改进管理方式，有补偿性机会提高退化土地的生产力和有机碳储存。有意识管理和无意识管理的大片地区也受到气候快速变化的影响，使许多SOC库存容易因分解或干扰而损失。为了量化潜在的SOC损失或封存在现场，区域和全球范围内，测量检测SOC的变化是必要的。这种测量和土壤管理的最佳做法应该基于对不同时间尺度、土壤类型和空间尺度上碳稳定和不稳定过程的成熟和新兴的科学理解。作为国际土壤碳网络的新成员，我们已经确定了数据，建模和沟通方面的差距，强调需要一个开放，共享的网络来框架和指导SOM和SOC的研究及其管理，以实现可持续生产和气候调节。
Soil organic matter (SOM) supports the Earth's ability to sustain terrestrial ecosystems, provide food and fiber, and retains the largest pool of actively cycling carbon. Over 75% of the soil organic carbon (SOC) in the top meter of soil is directly affected by human land use. Large land areas have lost SOC as a result of land use practices, yet there are compensatory opportunities to enhance productivity and SOC storage in degraded lands through improved management practices. Large areas with and without intentional management are also being subjected to rapid changes in climate, making many SOC stocks vulnerable to losses by decomposition or disturbance. In order to quantify potential SOC losses or sequestration at field, regional, and global scales, measurements for detecting changes in SOC are needed. Such measurements and soil-management best practices should be based on well established and emerging scientific understanding of processes of C stabilization and destabilization over various timescales, soil types, and spatial scales. As newly engaged members of the International Soil Carbon Network, we have identified gaps in data, modeling, and communication that underscore the need for an open, shared network to frame and guide the study of SOM and SOC and their management for sustained production and climate regulation.