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Functional shift in soil microbiome with decline in photosynthetic carbon input signifies rapid decrease of soil organic carbon during alpine grassland degradation

文献类型：期刊论文

作者Song, Minghua5; Pang, Rui4; Tian, Yuqiang3; Li, Yikang2; Wang, Guiqiang1,2; Xu, Xingliang5
刊名BIOLOGY AND FERTILITY OF SOILS
出版日期2025-03-19
卷号N/A
关键词C-13 tracer Photosynthetic carbon incorporation Phospholipid fatty acid profiles Stable isotope Grassland degradation Tibetan Plateau
ISSN号0178-2762
DOI10.1007/s00374-025-01907-3
产权排序1
文献子类Article ; Early Access
英文摘要How photosynthetic carbon input regulates the microbial processes involved in carbon incorporation into soil organic carbon (SOC) and its stabilization during grassland degradation remains unclear. We utilized 13C to trace photosynthetic carbon incorporation into SOC and its pools, particulate (POC) and mineral-associated (MAOC) organic carbon, and carbon assimilation by soil microbes across five stages of alpine grassland degradation (S0, without grazing; S1, moderate grazing; S2-S4, light, moderate, and heavy degradation). As grassland approached S4, SOC in the top layer decreased by 53% compared with that in S3. A similar trend was observed in the middle and bottom soil layers, corresponding to a significant decrease in POC (decreased by 54, 40, and 35% in the top, middle and bottom layer, respectively) and carbon incorporation into POC (decreased by 83, 24, and 91% in the top, middle and bottom layer, respectively). A rapid decrease in MAOC was observed in S4, and carbon incorporation into MAOC decreased abruptly in the middle (10-20 cm) and bottom (20-30 cm) soil layers of S3. More than 57% of the incorporated carbon was concentrated in the top (0-10 cm) layers of S0-S4, whereas the middle and bottom layers of S3 and S4 exhibited nearly zero carbon incorporation. During degradation, fungal groups exhibited a downward trend in photosynthetic carbon assimilation, which was associated with their decreasing contribution to carbon incorporation into SOC. However, a relatively high proportion of bacteria participated in carbon assimilation at all soil depths at each stage, suggesting that more bacteria became active in decomposing the original SOC with decreasing carbon input. Our study successfully links aboveground and belowground processes which are crucial to comprehensively understand ecosystem responses to climate change and human activities.
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WOS关键词KOBRESIA-PYGMAEA ECOSYSTEM ; LITTER DECOMPOSITION ; TIBETAN ; TRANSLOCATION ; COMMUNITY ; FORM ; SEQUESTRATION ; AVAILABILITY ; TRAITS ; WATER
WOS研究方向Agriculture
语种英语
WOS记录号WOS:001449379200001
出版者SPRINGER
源URL[http://ir.igsnrr.ac.cn/handle/311030/213251]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Song, Minghua; Xu, Xingliang
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Restorat Ecol Cold Area, 59 Xiguan Dajie, Xining 810008, Qinghai, Peoples R China;
3.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China;
4.Chinese Acad Sci, Inst Genet & Dev Biol, Hebei Key Lab Soil Ecol,Ctr Agr Resources Res, Key Lab Agr Water Resources, Shijiazhuang 050021, Peoples R China;
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, A11 Datun Rd, Beijing 100101, Peoples R China;
推荐引用方式
GB/T 7714		 Song, Minghua,Pang, Rui,Tian, Yuqiang,et al. Functional shift in soil microbiome with decline in photosynthetic carbon input signifies rapid decrease of soil organic carbon during alpine grassland degradation[J]. BIOLOGY AND FERTILITY OF SOILS,2025,N/A.
APA Song, Minghua,Pang, Rui,Tian, Yuqiang,Li, Yikang,Wang, Guiqiang,&Xu, Xingliang.(2025).Functional shift in soil microbiome with decline in photosynthetic carbon input signifies rapid decrease of soil organic carbon during alpine grassland degradation.BIOLOGY AND FERTILITY OF SOILS,N/A.
MLA Song, Minghua,et al."Functional shift in soil microbiome with decline in photosynthetic carbon input signifies rapid decrease of soil organic carbon during alpine grassland degradation".BIOLOGY AND FERTILITY OF SOILS N/A(2025).

入库方式： OAI收割

来源：地理科学与资源研究所

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