Geostatistical analysis of the distribution of NH4+ and NO2--oxidizing bacteria and serotypes at the millimeter scale along a soil transect

被引:108
作者
Grundmann, GL
Debouzie, D
机构
[1] UCB Lyon 1, CNRS, UMR 5557, Lab Ecol Microbienne, F-69622 Villeurbanne, France
[2] UCB Lyon 1, CNRS, UMR 5558, Lab Biometr & Biol Evolut, F-69622 Villeurbanne, France
关键词
spatial pattern; micro-scale; geostatistics; bacterium; NH4+-oxidizer; NO2--oxidizer; soil;
D O I
10.1111/j.1574-6941.2000.tb00754.x
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Soil is known to be heterogeneous for different activities at several spatial scales. Most studies have focused on macro- and meso-scales but micro-scales are rarely addressed. Hence, the spatial structure of NH4+- and NO2--oxidizers and of various serotypes of the latter was studied along two transects of approximately 10 cm, with two micro-samples taken from each millimeter. The presence of NH4- and NO2-- oxidizers in a micro-sample was detected using colorimetric tests for the presence or absence of NO2- in cultures of the micro-samples. Geostatistics was used to determine the range of spatial influence of the bacterial types. For both types, semi-variograms indicated a nonrandom spatial pattern. The spatial dependence ranged from 2 to 4 mm for NO2- and NH4+-oxidizers respectively, and the two bacterial types were not independently spatially located. Among the six serotypes of NO2--oxidizers, only one exhibited a spatial dependence. The existence of a spatial structure at the millimeter scale suggests that micro-scale sampling should be employed for soil studies. Therby, data on bacterial populations and activities can be referred to a spatial scale which is meaningful to these organisms. (C) 2000 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:57 / 62
页数:6
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