globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12144
Scopus记录号: 2-s2.0-84937975691
论文题名:
The influence of surface soil physicochemistry on the edaphic bacterial communities in contrasting terrain types of the Central Namib Desert
作者: Gombeer S.; Ramond J.-B.; Eckardt F.D.; Seely M.; Cowan D.A.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2015
卷: 13, 期:5
起始页码: 494
结束页码: 505
语种: 英语
Scopus关键词: microbial community ; soil chemistry ; species diversity ; terrain ; Namib Desert ; Namibia ; Bacteria (microorganisms) ; soil ; bacterium ; biota ; chemistry ; classification ; comparative study ; desert climate ; genetics ; microbiology ; Namibia ; physical chemistry ; restriction fragment length polymorphism ; soil ; Bacteria ; Biota ; Desert Climate ; Namibia ; Physicochemical Phenomena ; Polymorphism, Restriction Fragment Length ; Soil ; Soil Microbiology
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Notwithstanding, the severe environmental conditions, deserts harbour a high diversity of adapted micro-organisms. In such oligotrophic environments, soil physicochemical characteristics play an important role in shaping indigenous microbial communities. This study investigates the edaphic bacterial communities of three contrasting desert terrain types (gravel plains, sand dunes and ephemeral rivers) with different surface geologies in the Central Namib Desert. For each site, we evaluated surface soil physicochemistries and used explorative T-RFLP methodology to get an indication of bacterial community diversities. While grain size was an important parameter in separating the three terrain types physicochemically and specific surface soil types could be distinguished, the desert edaphic bacterial communities displayed a high level of local spatial heterogeneity. Ten variables contributed significantly (P < 0.05) to the variance in the T-RFLP data sets: fine silt, medium and fine sand content, pH, S, Na, Zn, Al, V and Fe concentrations, and 40% of the total variance could be explained by these constraining variables. The results suggest that local physicochemical conditions play a significant role in shaping the bacterial structures in the Central Namib Desert and stress the importance of recording a wide variety of environmental descriptors to comprehensively assess the role of edaphic parameters in shaping microbial communities. © 2015 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85141
Appears in Collections:影响、适应和脆弱性

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作者单位: Centre for Microbial Ecology and Genomics (CMEG), Genomics Research Institute, University of Pretoria, Pretoria, South Africa; Environmental and Geographical Science, Department of Geography, University of Cape Town, Cape Town, South Africa; Gobabeb Research and Training Centre, Walvis Bay, Namibia; School of Animal, Plant and Environmental Sciences (AP and ES), University of the Witwatersrand, Johannesburg, South Africa

Recommended Citation:
Gombeer S.,Ramond J.-B.,Eckardt F.D.,et al. The influence of surface soil physicochemistry on the edaphic bacterial communities in contrasting terrain types of the Central Namib Desert[J]. Geobiology,2015-01-01,13(5)
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