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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2014.6
- 수록면
- 292 - 292 (1page)
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초록· 키워드
Biogeography is the study of the distribution of biodiversity over space and time in order to understand the processes and rank the environmental filters involved in shaping this biodiversity. One way to discriminate the spatial processing of microbial diversification is to evaluate the Taxa-Area Relationship, one of the oldest and most relevant empirical relationships, which corresponds to the turnover of biodiversity with increasing distance or area. Based on this approach, recent molecular fingerprinting studies demonstrated that soil microorganisms are not strictly cosmopolitan since their distribution is systematically heterogeneous and structured into biogeographical patterns. This leads to rejecting the first part of Baas Becking’s postulate (1934): “Everything is everywhere, but, the environment selects”. These studies also allowed an estimation of the relative importance of diversification processes: selection and dispersal limitation; and the identification of the environmental filters shaping soil microbial diversity: mainly pH, trophic resources (Organic Carbon and Nitrogen contents, C:N ratio), texture and land use. Nevertheless, the impressive power of new high-throughput sequencing technologies allows more detailed information on soil microbial communities which may lead to better evaluate the relative importance of the relevant diversification processes and identify the associated environmental filters.
Here, soil bacterial communities were characterized by means of molecular fingerprinting (A-RISA method) and 454-pyrosequencing (targeting the 16S rDNA gene) approaches on 411 soils from four French regions of contrasting environmental heterogeneity (Landes<Burgundy<Brittany<<South-East, area range: 13800 to 33500 km²) using the systematic grid of the French Soil Quality Monitoring Network. The main objective of this study was to evaluate both molecular methods in regards of: (i) the estimation of soil bacterial communities’ diversification (Taxa-Area Relationship), (ii) the relative importance of diversi ... 전체 초록 보기
#high-throughput sequencing
#Taxa Area relationship
#environmental selection
#Dispersal
#soil microbial communities
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