Divergent accumulation of microbial necromass and plant lignin components in grassland soils
| Autor: | Guohua Dai, Xiangyan Su, Bowei Feng, Zhiheng Wang, Kaihui Li, Shanshan Zhu, Xiaojuan Feng, Yongfei Bai, Chao Liang, Huifeng Hu, Dima Chen, Tian Ma, Wenxuan Han |
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| Rok vydání: | 2018 |
| Předmět: |
Carbon Sequestration
010504 meteorology & atmospheric sciences Amino sugar Soil texture Science General Physics and Astronomy Lignin complex mixtures 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Carbon cycle Soil chemistry.chemical_compound otorhinolaryngologic diseases lcsh:Science Soil Microbiology 0105 earth and related environmental sciences chemistry.chemical_classification Multidisciplinary Soil organic matter fungi food and beverages Amino Sugars Soil classification 04 agricultural and veterinary sciences General Chemistry Soil carbon Grassland chemistry Environmental chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries lcsh:Q sense organs |
| Zdroj: | Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018) Nature Communications |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-018-05891-1 |
| Popis: | The means through which microbes and plants contribute to soil organic carbon (SOC) accumulation remain elusive due to challenges in disentangling the complex components of SOC. Here we use amino sugars and lignin phenols as tracers for microbial necromass and plant lignin components, respectively, and investigate their distribution in the surface soils across Mongolian grasslands in comparison with published data for other grassland soils of the world. While lignin phenols decrease, amino sugars increase with SOC contents in all examined grassland soils, providing continental-scale evidence for the key role of microbial necromass in SOC accumulation. Moreover, in contrast to clay’s control on amino sugar accumulation in fine-textured soils, aridity plays a central role in amino sugar accrual and lignin decomposition in the coarse-textured Mongolian soils. Hence, aridity shifts may have differential impacts on microbial-mediated SOC accumulation in grassland soils of varied textures. It remains unclear how microbes and plants contribute to soil organic carbon (SOC) accrual. Here, using biomarkers, the authors show that microbial necromass and plant-derived lignin components have divergent accumulation mechanisms and that microbial necromass plays a key role in SOC accumulation. |
| Databáze: | OpenAIRE |
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