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Effect of desert soil algae on the stabilization of fine sands
Wang, W; He, SP; Chen, YY; Liu, YD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2002
Source PublicationJOURNAL OF APPLIED PHYCOLOGY
Volume14Issue:4Pages:281-292
AbstractFour filamentous cyanobacteria, Microcoleus vaginatus, Phormidium tenue, Scytonema javanicum (Kutz.) and Nostoc sp., and a single-celled green alga, Desmococcus olivaceus, all isolated from Shapotou (Ningxia Hui Autonomous Region of China), were batch cultured and inoculated onto unconsolidated sand in greenhouse and field experiments. Their ability to reduce wind erosion in sands was quantified by using a wind tunnel laboratory. The major factors related to cohesion of algal crusts, such as biomass, species, species combinations, bioactivity, niche, growth phase of algae, moisture, thickness of the crusts, dust accretion (including dust content and manner of dust added) and other cryptogams (lichens, fungi and mosses) were studied. The best of the five species were M. vaginatus and P. tenue, while the best mix was a blend of 80% M. vaginatus and 5% each of P. tenue, S. javanicum, Nostoc sp. and D. olivaceus. The threshold friction velocity was significantly increased by the presence of all of the cyanobacterial species, while the threshold impact velocity was notably increased only by the filamentous species. Thick crusts were less easily eroded than thin crusts, while biomass was more effective than thickness. Dust was incorporated best into Microcoleus crust when added in small amounts over time, and appeared to increase growth of the cyanobacterium as well as strengthen the cohesion of the crust. Microbial crust cohesion was mainly attributed to algal aggregation, while lichens, fungi and mosses affected more the soil structure and physico-chemical properties.
KeywordAlgal Crust Crust Cohesion Desert Soil Algae Microbial Crust Sand Stability Sand Wind Tunnel Wind Erosion
DepartmentChinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; NW Normal Univ, Coll Life Sci, Lanzhou 730070, Peoples R China
Subject AreaBiotechnology & Applied Microbiology ; Marine & Freshwater Biology
Indexed BySCI
WOS IDWOS:000179310700006
Citation statistics
Cited Times:105[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9770
Collection期刊论文
Corresponding AuthorLiu, YD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Wang, W,He, SP,Chen, YY,et al. Effect of desert soil algae on the stabilization of fine sands[J]. JOURNAL OF APPLIED PHYCOLOGY,2002,14(4):281-292.
APA Wang, W,He, SP,Chen, YY,&Liu, YD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2002).Effect of desert soil algae on the stabilization of fine sands.JOURNAL OF APPLIED PHYCOLOGY,14(4),281-292.
MLA Wang, W,et al."Effect of desert soil algae on the stabilization of fine sands".JOURNAL OF APPLIED PHYCOLOGY 14.4(2002):281-292.
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