Nearly 30a shrub introduction in desert steppes has led to an increase in saprotrophic fungi, accelerating the degradation of carbon compounds and nitrate reduction
文献类型：期刊论文
| 作者 | Li, Zhili3,4; Zhao, Yanan2,4; Li, Zhigang3,4; Wang, Hongmei1,3,4; Li, Jianping3,4; Zhang, Zhenjie3,4; Chen, Yanshuo3,4; Li, B. Larry1 |
| 刊名 | ENVIRONMENTAL RESEARCH
 |
| 出版日期 | 2025 |
| 卷号 | 264页码:14 |
| 关键词 | Shrub introduction Bacterial community Fungal community Soil FUNGuild Soil FAPROTAX Desert steppe |
| ISSN号 | 0013-9351 |
| DOI | 10.1016/j.envres.2024.120402 |
| 通讯作者 | Wang, Hongmei(whm_826@nxu.edu.cn) ; Li, B. Larry(bai-lian.li@ucr.edu) |
| 英文摘要 | Clarifying how soil microbial communities respond to shrub introduction after overgrazing in desert steppe and their potential functions is crucial for understanding the biogeochemical processes involved in vegetation transformation and sustainability of desert grasslands. However, the dynamics of microbial communities remain poorly understood. We selected enclosed grasslands (20a), overgrazed grasslands, and shrublands (6a, 15a, and 25a) to explore how shrubs introduced influence soil microbial structure and functional groups over the long term after desert grassland degradation. The results showed that overgrazing and shrub introduction (Caragana korshinskii) had more significant impacts on microbial beta diversity than on alpha diversity. Fungal communities were more sensitive to grassland degradation. In contrast, introducing shrubs affected both fungal and bacterial communities, and an increase in shrub age drove the synergistic effects of fungal species. Soil nitrate and microbial biomass nitrogen were the key factors affecting bacterial and fungal communities. Compared with enclosed grasslands, overgrazing and introducing shrubs significantly increased soil nitrate reduction, ectomycorrhizals, and endophytes. The introduction of shrubs after overgrazing in desert steppe further enhanced the decomposition of carbon compounds and reduced processes such as denitrification. During shrub introduction, total phosphorus, nitrate-nitrogen, and N-acetylglucosaminidase were key factors affecting carbon, nitrogen, and fungal functional groups. Variations in microbial diversity and functional groups, through their influence on extracellular enzymes activity and the availability of microbial biomass nutrients, ultimately explained 85%, 42%, and 34% the observed variations in soil carbon, nitrogen, and phosphorus content, respectively. This study aimed to investigate the long-term effects of anthropogenic shrub expansion on the structure and function of soil microbial communities in degraded desert steppes, provide a scientific basis for steppe restoration and management, and further understand their significance for ecosystem sustainability. |
| WOS关键词 | SOIL MICROBIAL COMMUNITY ; NITROGEN ; BACTERIAL ; DIVERSITY ; ENCROACHMENT ; DYNAMICS ; DECOMPOSITION ; MYCORRHIZAL ; FOREST ; VEGETATION |
| 资助项目 | National Natural Science Foundation of China[31860677] ; Postdoctoral Fellowship Program of CPSF[GZC20232621] ; Ningxia Higher Education Institutions First-Class Discipline Construction Project[NXYLXK2017A01] |
| WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| 语种 | 英语 |
| WOS记录号 | WOS:001395253700001 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 资助机构 | National Natural Science Foundation of China ; Postdoctoral Fellowship Program of CPSF ; Ningxia Higher Education Institutions First-Class Discipline Construction Project |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/212625]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Hongmei; Li, B. Larry |
| 作者单位 | 1.Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Ningxia Univ, Key Lab Restorat & Reconstruct Degraded Ecosyst No, Minist Educ, Yinchuan, Peoples R China 4.Ningxia Univ, Coll Forestry & Prataculture, Yinchuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhili,Zhao, Yanan,Li, Zhigang,et al. Nearly 30a shrub introduction in desert steppes has led to an increase in saprotrophic fungi, accelerating the degradation of carbon compounds and nitrate reduction[J]. ENVIRONMENTAL RESEARCH,2025,264:14. |
| APA | Li, Zhili.,Zhao, Yanan.,Li, Zhigang.,Wang, Hongmei.,Li, Jianping.,...&Li, B. Larry.(2025).Nearly 30a shrub introduction in desert steppes has led to an increase in saprotrophic fungi, accelerating the degradation of carbon compounds and nitrate reduction.ENVIRONMENTAL RESEARCH,264,14. |
| MLA | Li, Zhili,et al."Nearly 30a shrub introduction in desert steppes has led to an increase in saprotrophic fungi, accelerating the degradation of carbon compounds and nitrate reduction".ENVIRONMENTAL RESEARCH 264(2025):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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