气候变化领域集成服务门户(CCPortal): The contribution of microbial necromass to soil organic carbon and influencing factors along a variation of habitats in alpine ecosystems

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DOI	10.1016/j.scitotenv.2024.171126
	The contribution of microbial necromass to soil organic carbon and influencing factors along a variation of habitats in alpine ecosystems
	Hou, Zhuonan; Wang, Ruihong; Chang, Su; Zheng, Yi; Ma, Tiantian; Xu, Shaoqi; Zhang, Xinjun; Shi, Xiong; Lu, Jie; Luo, Daqing; Wang, Bo; Du, Zhangliu; Wei, Yuquan
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	921
卷号	921
英文摘要	A growing consensus is reached that microbes contributes to regulating the formation and accumulation of soil organic carbon (SOC). Nevertheless, less is known about the role of soil microbes (necromass, biomass) in SOC accumulation in different habitat conditions in alpine ecosystems. To address this knowledge gap, the composition and distribution of amino sugars (ASs) and phospholipid fatty acids (PLFAs) as biomarkers of microbial necromass and biomass were investigated in forest, meadow and wetland soil profile (0 -40 cm) of Mount Segrila, Tibet, China, as well the contribution of bacterial and fungal necromass to SOC. The results revealed that microbial necromass carbon contributed 45.15 %, 72.51 % and 78.08 % on average to SOC in 0 -40 cm forest, meadow and wetland soils, respectively, and decreased with microbial biomass. Fungal necromass contributed more to SOC in these habitats than bacterial necromass. Microbial necromass increased with microbial biomass and both of them decreased with soil depth in all habitats. The necromass accumulation coefficient was significantly correlated with microbial necromass and biomass, affected by habitat and soil moisture. Structural equation model indicated that soil abiotic factors indirectly mediated the accumulation of SOC through microbial necromass and biomass. This study revealed that different habitats and soil depths control considerably soil physicochemical properties and microbial community, finally influencing SOC accumulation in alpine ecosystems, which emphasized the influence of abiotic factors on microbial necromass and biomass for SOC accumulation in alpine ecosystems.
英文关键词	Qinghai-Tibet Plateau; Microbial biomass; Fungal necromass; Bacterial necromass; Soil abiotic properties
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001231352000001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/288925
作者单位	Tibet Agriculture & Animal Husbandry University; China Agricultural University; China Three Gorges Corporation; Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences
推荐引用方式 GB/T 7714	Hou, Zhuonan,Wang, Ruihong,Chang, Su,et al. The contribution of microbial necromass to soil organic carbon and influencing factors along a variation of habitats in alpine ecosystems[J],2024,921.
APA	Hou, Zhuonan.,Wang, Ruihong.,Chang, Su.,Zheng, Yi.,Ma, Tiantian.,...&Wei, Yuquan.(2024).The contribution of microbial necromass to soil organic carbon and influencing factors along a variation of habitats in alpine ecosystems.SCIENCE OF THE TOTAL ENVIRONMENT,921.
MLA	Hou, Zhuonan,et al."The contribution of microbial necromass to soil organic carbon and influencing factors along a variation of habitats in alpine ecosystems".SCIENCE OF THE TOTAL ENVIRONMENT 921(2024).