Spatial distribution of bacterial communities and their relationships with the micro-architecture of soil
Spatial distribution of bacterial communities and their relationships with the micro-architecture of soil
复制标题
DOI：
10.1016/s0168-6496(03)00027-8
复制
发表时间：
2003-05-15
影响因子：
4.2
通讯作者：
Ritz, K
中科院分区：
文献类型：
--
作者：
Nunan, N;Wu, KJ;Ritz, K
利用生物土壤薄片以及图像分析和地统计工具的结合，对土壤中细菌的分布及其与孔隙的关系进行了详细调查。在微观尺度上证明了细菌分布空间模式的存在，空间自相关范围为 1 毫米及以下。在表土样品和一份底土样品的细菌斑块内发现了细菌密度梯度。其余底土样本中的细菌密度斑块显示出高值和低值的镶嵌。在孔隙的空间结构中检测到各向异性，但没有检测到与细菌分布的关系。表土中的细菌密度值没有观察到与最近孔隙距离的函数的明显趋势，但在底土中，靠近孔隙的细菌密度最大，此后逐渐下降。耕作表土中的细菌聚集最为严重，但细菌聚集程度与最近孔隙距离的关系没有发现一致的趋势。讨论了结果对土壤中细菌活性建模和预测的影响。 (C) 2003 年欧洲微生物学会联合会。由 Elsevier Science B.V. 出版。保留所有权利。
Biological soil thin-sections and a combination of image analysis and geostatistical tools were used to conduct a detailed investigation into the distribution of bacteria in soil and their relationship with pores. The presence of spatial patterns in the distribution of bacteria was demonstrated at the microscale, with ranges of spatial autocorrelation of 1 mm and below. Bacterial density gradients were found within bacterial patches in topsoil samples and also in one subsoil sample. Bacterial density patches displayed a mosaic of high and low values in the remaining subsoil samples. Anisotropy was detected in the spatial structure of pores, but was not detected in relation to the distribution of bacteria. No marked trend as a function of distance to the nearest pore was observed in bacterial density values in the topsoil, but in the subsoil bacterial density was greatest close to pores and decreased thereafter. Bacterial aggregation was greatest in the cropped topsoil, though no consistent trends were found in the degree of bacterial aggregation as a function of distance to the nearest pore. The implications of the results presented for modelling and predicting bacterial activity in soil are discussed. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.