Temporal–spatial variations of soil respiration and the controlling factors on global scale (1991–2015)

IF 3.4 2区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS Journal of Geochemical Exploration Pub Date : 2024-08-08 DOI:10.1016/j.gexplo.2024.107562
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Abstract

Temporal–spatial variations of soil respiration and the controlling factors is important for understanding the global carbon cycle process. In this research, the Global Soil Respiration Database (SRDB) and Global Geochemical Baseline (GGB) dataset were used, temporal–spatial variations of soil respiration from 1991 to 2015 and the controlling factors in soils developed from different soil parent materials were analyzed. We found, for the first time, soil respiration was significantly varied in soils developed from different soil parent materials on a global scale, which was mainly controlled by geochemical indexes such as Al/Si, MnO, CaO and P2O5. We also found that temporal variations of soil respiration during 1991–2015 in acidic plutonic rocks, acidic volcanic rocks, metamorphic rocks, siliciclastic sedimentary rocks and unconsolidated sediments–developed soils was significantly controlled by temperature, while that of basic plutonic rocks, basic volcanic rocks, intermediate volcanic rocks, mixed sedimentary rocks and carbonate rocks–developed soils was less sensitive to temperature relatively. We conclude that temporal–spatial variations of soil respiration were correlated with soil geochemistry, which mainly depends on the stability difference caused by the bonding between soil organic carbon and soil minerals. The findings may be helpful to understand the temporal–spatial pattern of global soil respiration, moreover reveal the importance of soil geochemistry in influencing soil respiration on global scale.

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全球范围内土壤呼吸作用的时空变化及其控制因素(1991-2015 年)
土壤呼吸作用的时空变化及其控制因子对于理解全球碳循环过程非常重要。本研究利用全球土壤呼吸数据库(SRDB)和全球地球化学基线(GGB)数据集,分析了1991-2015年不同土壤母质发育土壤的土壤呼吸时空变化及其控制因素。我们首次发现,在全球范围内,由不同土壤母质发育而成的土壤的土壤呼吸量存在显著差异,主要受 Al/Si、MnO、CaO 和 PO 等地球化学指标的控制。我们还发现,1991-2015 年期间,酸性块岩、酸性火山岩、变质岩、硅质沉积岩和未固结沉积物发育土壤的土壤呼吸作用的时间变化受温度的显著控制,而碱性块岩、碱性火山岩、中性火山岩、混合沉积岩和碳酸盐岩发育土壤的土壤呼吸作用对温度的敏感性相对较低。我们的结论是,土壤呼吸作用的时空变化与土壤地球化学相关,而土壤地球化学主要取决于土壤有机碳与土壤矿物之间的结合所产生的稳定性差异。这些发现有助于理解全球土壤呼吸作用的时空格局,并揭示了土壤地球化学在全球范围内影响土壤呼吸作用的重要性。
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来源期刊
Journal of Geochemical Exploration
Journal of Geochemical Exploration 地学-地球化学与地球物理
CiteScore
7.40
自引率
7.70%
发文量
148
审稿时长
8.1 months
期刊介绍: Journal of Geochemical Exploration is mostly dedicated to publication of original studies in exploration and environmental geochemistry and related topics. Contributions considered of prevalent interest for the journal include researches based on the application of innovative methods to: define the genesis and the evolution of mineral deposits including transfer of elements in large-scale mineralized areas. analyze complex systems at the boundaries between bio-geochemistry, metal transport and mineral accumulation. evaluate effects of historical mining activities on the surface environment. trace pollutant sources and define their fate and transport models in the near-surface and surface environments involving solid, fluid and aerial matrices. assess and quantify natural and technogenic radioactivity in the environment. determine geochemical anomalies and set baseline reference values using compositional data analysis, multivariate statistics and geo-spatial analysis. assess the impacts of anthropogenic contamination on ecosystems and human health at local and regional scale to prioritize and classify risks through deterministic and stochastic approaches. Papers dedicated to the presentation of newly developed methods in analytical geochemistry to be applied in the field or in laboratory are also within the topics of interest for the journal.
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