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DOI	10.1038/s41561-022-01100-3
	Formation of necromass-derived soil organic carbon determined by microbial death pathways
	Camenzind, Tessa; Mason-Jones, Kyle; Mansour, India; Rillig, Matthias C.; Lehmann, Johannes
发表日期	2023
ISSN	1752-0894
EISSN	1752-0908
起始页码	115
结束页码	122
卷号	16 期号:2 页码:8
英文摘要	Microbial death pathways affect the quantity and composition of microbial necromass and its associated soil organic carbon. Soil organic matter is the dominant carbon pool in terrestrial ecosystems, and its management is of increasing policy relevance. Soil microbes are the main drivers of soil organic carbon sequestration, especially through accumulation of their necromass. However, since the direct characterization of microbial necromass in soil is challenging, its composition and formation remain unresolved. Here we provide evidence that microbial death pathways (the distinct processes of microbial dying) in soil affect necromass composition and its subsequent fate. Importantly, the composition of derived microbial necromass does not equal that of microbial biomass. From biomass to necromass, distinct chemical transformations lead to increases in cell wall/cytoplasm ratios while nutrient contents and easily degradable compounds are depleted. The exact changes depend on environmental conditions and the relevance of different microbial death pathways, for example, predation, starvation or anthropogenic stresses. This has far-reaching consequences for mechanisms underpinning biogeochemical processes: (1) the quantity and persistence of microbial necromass is governed by microbial death pathways, not only the initial biomass composition; (2) efficient recycling of nutrients within microbial biomass presents a possible pathway of organic carbon sequestration that minimizes nitrogen losses; (3) human-induced disturbances affect the causes of microbial death and consequently necromass composition. Thus, new research focusing on microbial death pathways holds great potential to improve management strategies for soil organic carbon storage. Not only microbial growth but also death drive the soil microbial carbon pump.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000918422000001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272560
作者单位	Free University of Berlin; Royal Netherlands Academy of Arts & Sciences; Netherlands Institute of Ecology (NIOO-KNAW); Cornell University
推荐引用方式 GB/T 7714	Camenzind, Tessa,Mason-Jones, Kyle,Mansour, India,et al. Formation of necromass-derived soil organic carbon determined by microbial death pathways[J],2023,16(2):8.
APA	Camenzind, Tessa,Mason-Jones, Kyle,Mansour, India,Rillig, Matthias C.,&Lehmann, Johannes.(2023).Formation of necromass-derived soil organic carbon determined by microbial death pathways.NATURE GEOSCIENCE,16(2),8.
MLA	Camenzind, Tessa,et al."Formation of necromass-derived soil organic carbon determined by microbial death pathways".NATURE GEOSCIENCE 16.2(2023):8.