Transect-scale controlling factors for soil microbial biomass carbon

IF 2.6 2区 农林科学 Q1 FORESTRY European Journal of Forest Research Pub Date : 2024-08-06 DOI:10.1007/s10342-024-01722-9
Jie Gu, Roland Bol, Genmei Wang, Jian Xiang, Huanchao Zhang
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Abstract

Soil microbial biomass carbon (MBC) plays an essential role in driving and regulating global cycling of carbon (C) which is critically important to climate system. However, the pivotal transect-scale determinant factor for the content of soil MBC, along with the variation pattern in different natural forests and soils has not been sufficiently investigated. In this study, 252 soils samples (6 replicates and 3 depths for each site) were sampled from 14 forests which lie in 7 soil types along the 4000 km North-South transect of Eastern China. We found that the highest content of soil MBC in the whole soil profile with 556.69 ± 14.59 mg C kg− 1 occurred in the subalpine coniferous forest, and the lowest content was observed with 53.11 ± 10.22 mg C kg− 1 in warm coniferous forest. From the angle of soil type, in the whole soil profile Haplic Andosol had the highest content of soil MBC with 480 mg C kg− 1, while Haplic ferralsol possessed the lowest content of MBC with 102 mg C kg− 1. In addition, over the North-South transect of Eastern China the strongest correlation was observed in between the content of soil MBC and altitude (ALT) (R2 = 0.64), followed by soil type (R2 = -0.61), mean annual temperature (MAT) (R2 = -0.56). We concluded that the content of soil MBC in natural forests is mainly controlled by ALT on a transect scale. We believed that the soil C in Yue spruce-fir forest was relatively stable, which can be an option to be a specific forest to optimize forest management and to contribute to mitigating climate change.

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土壤微生物生物量碳的断面尺度控制因子
土壤微生物生物量碳(MBC)在推动和调节碳(C)的全球循环中发挥着至关重要的作用,这对气候系统至关重要。然而,关于土壤微生物生物量碳含量的关键横断尺度决定因素,以及不同天然林和土壤中的变化模式,尚未得到充分研究。本研究在中国东部 4000 公里南北横断面上的 7 种土壤类型的 14 个森林中采集了 252 个土壤样品(每个地点 6 个重复,3 个深度)。结果表明,亚高山针叶林土壤MBC含量最高,为556.69 ± 14.59 mg C kg- 1;暖季针叶林土壤MBC含量最低,为53.11 ± 10.22 mg C kg- 1。从土壤类型的角度来看,在整个土壤剖面中,Haplic Andosol 的土壤多溴联苯含量最高,为 480 毫克碳千克-1,而 Haplic ferralsol 的土壤多溴联苯含量最低,为 102 毫克碳千克-1。此外,在华东地区南北横断面上,土壤多溴联苯含量与海拔(ALT)的相关性最强(R2 = 0.64),其次是土壤类型(R2 = -0.61)和年平均气温(MAT)(R2 = -0.56)。我们得出的结论是,在横断面上,天然林土壤 MBC 的含量主要受 ALT 的控制。我们认为,岳云杉-冷杉林的土壤碳含量相对稳定,可以作为优化森林管理和减缓气候变化的特定森林选择。
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来源期刊
CiteScore
5.10
自引率
3.60%
发文量
77
审稿时长
6-16 weeks
期刊介绍: The European Journal of Forest Research focuses on publishing innovative results of empirical or model-oriented studies which contribute to the development of broad principles underlying forest ecosystems, their functions and services. Papers which exclusively report methods, models, techniques or case studies are beyond the scope of the journal, while papers on studies at the molecular or cellular level will be considered where they address the relevance of their results to the understanding of ecosystem structure and function. Papers relating to forest operations and forest engineering will be considered if they are tailored within a forest ecosystem context.
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