Biocrust wetting induced change in soil surface roughness as influenced by biocrust type, coverage and wetting patterns
文献类型：期刊论文
| 作者 | Wang, Lunjiang1,2; Zhang, Guanghui1,2; Zhu, Liangjun3; Wang, Hao1,2 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2017-11-15 |
| 卷号 | 306页码:1-9 |
| 关键词 | Biological soil crust Swelling Roughness Drying Wetting-drying cycle Laser scanner |
| ISSN号 | 0016-7061 |
| DOI | 10.1016/j.geoderma.2017.06.032 |
| 英文摘要 | Roughness significantly affects the hydrological and erosion processes in arid and semi-arid areas where biological soil crusts (biocrusts) are ubiquitous. Biocrusts influence roughness by the presence of the organisms and their swelling due to the wetting effect. However, the potential effects of biocrust coverage and wetting patterns on swelling induced roughness are elusive. This study aimed to determine the effects of biocrust type, coverage, and wetting patterns on wetting induced roughness (WIR) and to quantify the change process of WIR after wetting. Samples of cyanobacteria and moss with coverages categorized in five different classes were collected. High-resolution laser system samples were used to obtain measurements. The results showed that the mean swelling heights of cyanobacteria and moss were 0.068 mm and 0.415 mm, respectively, after 10 min of 2 mm water spraying. The swelling height of moss increased linearly (R-2 = 0.58, P < 0.001) with coverage. A mean negative WIR (-0.005 mm) was found for cyanobacteria, whereas it was 0.079 mm for moss. The WIR of moss was related to coverage (R-2 = 0.16, P = 0.003), and a critical coverage of moss existed between 20% and 40%, above which WIR increased sharply. The WIR of moss decreased as a power function of time after wetting (R-2 = 0.83). However, neither wetting-drying cycles nor drying durations influenced WIR for both cyanobacteria and moss crusts. The modifications of biocrust to soil surface are small. However, their potential influences on hydrology and erosion may help organisms in arid and semi-arid ecosystems make full use of the limited water, thus adapting to gradually changing environments. |
| WOS关键词 | MICROBIOTIC CRUSTS ; OVERLAND-FLOW ; LOESS PLATEAU ; NEGEV DESERT ; SEDIMENT TRANSPORT ; MICRO-TOPOGRAPHY ; NORTHERN CHINA ; LASER SCANNER ; EROSION ; RUNOFF |
| 资助项目 | State Key Program of National Natural Science of China[41530858] ; National Key R & D Program of China[2017YFC0504702] ; Creative Research Groups of the National Natural Science Foundation of China[41621061] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000409291000001 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/61840]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 1.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China 2.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Lunjiang,Zhang, Guanghui,Zhu, Liangjun,et al. Biocrust wetting induced change in soil surface roughness as influenced by biocrust type, coverage and wetting patterns[J]. GEODERMA,2017,306:1-9. |
| APA | Wang, Lunjiang,Zhang, Guanghui,Zhu, Liangjun,&Wang, Hao.(2017).Biocrust wetting induced change in soil surface roughness as influenced by biocrust type, coverage and wetting patterns.GEODERMA,306,1-9. |
| MLA | Wang, Lunjiang,et al."Biocrust wetting induced change in soil surface roughness as influenced by biocrust type, coverage and wetting patterns".GEODERMA 306(2017):1-9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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