Ecohydrological influences of biocrusts and their pathways in a desert steppe ecosystem
文献类型：期刊论文
| 作者 | Qiu, Dexun1; Xiao, Bo1,2,3; Kidron, Giora J.4 |
| 刊名 | ECOHYDROLOGY
 |
| 出版日期 | 2023-08-31 |
| 页码 | 16 |
| ISSN号 | 1936-0584 |
| 关键词 | biological soil crust desert steppe ecosystem ecohydrological processes soil hydraulic property soil infiltrability water holding capacity |
| DOI | 10.1002/eco.2581 |
| 通讯作者 | Xiao, Bo(xiaobo@cau.edu.cn) |
| 英文摘要 | Biological soil crusts (biocrusts) are a prevalent form of organic cover in drylands across the world, and they play a crucial role in shaping the ecohydrological processes and functioning of dryland ecosystems. However, in desert steppe ecosystems, the ecohydrological influences of biocrusts and their pathways have not yet been thoroughly understood. Here, we examined the influences of three types of biocrusts (cyanobacterial, cyanobacterial-moss mixed, and moss biocrusts) on soil water retention and infiltration in a typical desert steppe of northwestern China, and we also analysed the possible pathways through which biocrusts affect them. Accordingly, the field capacity (?(f), indicating soil water-holding capacity) and saturated hydraulic conductivity (K-s, indicating soil infiltrability) of each biocrust-covered soil and bare soil were measured both at 0-5 and 5-10 cm depths, on Arenosols (loamy sand texture) and Calcisols (silty loamy texture), respectively. Our results showed that the presence of biocrusts increased surface soil (0-5 cm) water-holding capacity while decreased soil infiltrability, creating a remarkable impact on soil water retention and infiltration. As compared to bare soil, the ?f of cyanobacterial, cyanobacterial-moss mixed, and moss biocrusts were increased by 16.5%, 21.4%, and 21.7% on Arenosols and by 9.6%, 18.9%, and 22.8% on Calcisols, while their Ks were reduced by 43.2%, 56.2%, and 38.2% on Arenosols, and by 49.0%, 68.7%, and 36.0% on Calcisols, respectively. The development of biocrusts on sandy textured soil had a more pronounced impact on both soil water retention and infiltration than loamy textured soil. We found that biocrusts mainly changed soil water retention and infiltration by increasing the contents of clay and organic matter. More specifically, the increase in clay content led to a more significant effect compared to the increase in organic matter content on Arenosols, while the opposite influence was observed on Calcisols. Among the three types of biocrusts, the soil infiltrability of the mixed biocrusts was the lowest, perhaps due to the interaction between the accumulation of clay particles by moss and the secretion of extracellular polymeric substances by cyanobacteria. Our study highlights the remarkable ecohydrological impacts of biocrusts on desert steppe ecosystems, and the results imply that it is of great necessary to integrate biocrusts and their influences into our understanding of ecohydrological processes in global drylands. |
| WOS关键词 | BIOLOGICAL SOIL CRUSTS ; NEGEV DESERT ; HYDRAULIC CONDUCTIVITY ; MICROBIOTIC CRUSTS ; WATER-RETENTION ; ORGANIC-MATTER ; LOESS PLATEAU ; SURFACE ; INFILTRATION ; DYNAMICS |
| 资助项目 | This study was funded by the National Natural Science Foundation of China (grant no. 42077010), the Light of West China Program of the Chinese Academy of Sciences (grant no. 2019), and the Open Fund for Key Laboratory of Land Degradation and Ecological R[2019] ; National Natural Science Foundation of China[LDER2022Z02] ; Light of West China Program of the Chinese Academy of Sciences ; Open Fund for Key Laboratory of Land Degradation and Ecological Restoration in Northwestern China of Ningxia University ; [42077010] |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:001059271300001 |
| 资助机构 | This study was funded by the National Natural Science Foundation of China (grant no. 42077010), the Light of West China Program of the Chinese Academy of Sciences (grant no. 2019), and the Open Fund for Key Laboratory of Land Degradation and Ecological R ; National Natural Science Foundation of China ; Light of West China Program of the Chinese Academy of Sciences ; Open Fund for Key Laboratory of Land Degradation and Ecological Restoration in Northwestern China of Ningxia University |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/196870]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Xiao, Bo |
| 作者单位 | 1.China Agr Univ, Coll Land Sci & Technol, Key Lab Arable Land Conservat North China, Minist Agr & Rural Affairs, Beijing, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling, Peoples R China 3.Ningxia Univ, Breeding Base State Key Lab Land Degradat & Ecol R, Key Lab Restorat & Reconstruct Degraded Ecosyst No, Minist Educ, Yinchuan 750021, Peoples R China 4.Hebrew Univ Jerusalem, Inst Earth Sci, Givat Ram Campus, Jerusalem, Israel |
| 推荐引用方式 GB/T 7714 | Qiu, Dexun,Xiao, Bo,Kidron, Giora J.. Ecohydrological influences of biocrusts and their pathways in a desert steppe ecosystem[J]. ECOHYDROLOGY,2023:16. |
| APA | Qiu, Dexun,Xiao, Bo,&Kidron, Giora J..(2023).Ecohydrological influences of biocrusts and their pathways in a desert steppe ecosystem.ECOHYDROLOGY,16. |
| MLA | Qiu, Dexun,et al."Ecohydrological influences of biocrusts and their pathways in a desert steppe ecosystem".ECOHYDROLOGY (2023):16. |
入库方式： OAI收割
来源：地理科学与资源研究所
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