Spatial and temporal biogeography of soil microbial communities in arid and semiarid regions.
Spatial and temporal biogeography of soil microbial communities in arid and semiarid regions.
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DOI：
10.1371/journal.pone.0069705
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Jurkevitch E
中科院分区：
文献类型：
--
作者：
Pasternak Z;Al-Ashhab A;Gatica J;Gafny R;Avraham S;Minz D;Gillor O;Jurkevitch E
土壤中的微生物群落可能会随着距离、季节、气候、土壤质地等环境参数而发生变化。在温带地区，微生物多样性模式已被广泛调查，但很少有研究试图从空间和时间尺度及其与环境因子的相关性，特别是在干旱生态系统中。为了在区域尺度上填补这一空白，在以色列干旱、半干旱、干燥地中海和地中海沿岸地区，对细菌、α-变形菌门和放线菌门三个分类类群的分子指纹图谱和丰度进行了采样。此外，在局部尺度上，在夏季和冬季，从半干旱地区相距1 cm-500 m的土壤中取样了三个分类类群——细菌、古细菌和真菌的分子指纹。细菌的指纹图谱在所有区域之间存在差异（P<0.02）， α-变形菌的指纹图谱在部分区域之间存在差异（0.01<P<0.09），放线菌的指纹图谱在所有区域之间具有相似性（P< 0.05）。在局部，古细菌和真菌的指纹图谱不表现出距离衰减关系（P>0.13），即群落间的差异不随地理距离的增加而增加。这种现象在夏季细菌样品中也不明显（P < 0.24）；冬季随着地理距离的增加，细菌群落间差异显著增大（P<0.01）。微生物群落结构和微生物丰度与降水、土壤质地、有机质和含水量呈极显著相关（R2>0.60， P<0.01）。结果表明，总体而言，以色列干旱半干旱土壤微生物生物地理受特定环境因素的影响大于地理距离和空间分布格局的影响。
Microbial communities in soils may change in accordance with distance, season, climate, soil texture and other environmental parameters. Microbial diversity patterns have been extensively surveyed in temperate regions, but few such studies attempted to address them with respect to spatial and temporal scales and their correlations to environmental factors, especially in arid ecosystems. In order to fill this gap on a regional scale, the molecular fingerprints and abundance of three taxonomic groups – Bacteria, α-Proteobacteria and Actinobacteria – were sampled from soils 0.5–100 km apart in arid, semi-arid, dry Mediterranean and shoreline Mediterranean regions in Israel. Additionally, on a local scale, the molecular fingerprints of three taxonomic groups – Bacteria, Archaea and Fungi – were sampled from soils 1 cm–500 m apart in the semi-arid region, in both summer and winter. Fingerprints of the Bacteria differentiated between all regions (P<0.02), while those of the α-Proteobacteria differentiated between some of the regions (0.01<P<0.09), and actinobacterial fingerprints were similar among all regions (P>0.05). Locally, fingerprints of archaea and fungi did not display distance-decay relationships (P>0.13), that is, the dissimilarity between communities did not increase with geographic distance. Neither was this phenomenon evident in bacterial samples in summer (P>0.24); in winter, however, differences between bacterial communities significantly increased as the geographic distances between them grew (P<0.01). Microbial community structures, as well as microbial abundance, were both significantly correlated to precipitation and soil characteristics: texture, organic matter and water content (R2>0.60, P<0.01). We conclude that on the whole, microbial biogeography in arid and semi-arid soils in Israel is determined more by specific environmental factors than geographic distances and spatial distribution patterns.
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DOI：
10.1073/pnas.1016308108
发表时间：
2011-05-10
影响因子：
11.1
作者：
Martiny, Jennifer B. H.;Eisen, Jonathan A.;Horner-Devine, M. Claire
通讯作者：
Horner-Devine, M. Claire
影响因子：
11
作者：
Angel, Roey;Soares, M. Ines M.;Gillor, Osnat
通讯作者：
Gillor, Osnat
影响因子：
4.4
作者：
Lauber, Christian L.;Hamady, Micah;Fierer, Noah
通讯作者：
Fierer, Noah
影响因子：
3.6
作者：
Moore-Kucera, Jennifer;Dick, Richard P.
通讯作者：
Dick, Richard P.
影响因子：
3.7
作者：
Angel R;Matthies D;Conrad R
通讯作者：
Conrad R