University Institute of Tropical Diseases and Public Health of the Canary Islands, 38203 Tenerife, Canary Islands, Spain.
Res Microbiol. 2013 Jan;164(1):17-21. doi: 10.1016/j.resmic.2012.08.009. Epub 2012 Sep 7.
Topsoil from arid regions is the main source of dust clouds that move through the earth's atmosphere, and microbial communities within these soils can survive long-range dispersion. Microbial abundance and chemical composition were analyzed in topsoil from various desert regions. Statistical analyses showed that microbial direct counts were strongly positively correlated with calcium concentrations and negatively correlated with silicon concentrations. While variance between deserts was expected, it was interesting to note differences between sample sites within a given desert region, illustrating the 'patchy' nature of microbial communities in desert environments.
干旱地区的表土是穿过地球大气层的尘云的主要来源，这些土壤中的微生物群落可以在长距离扩散中存活。对来自不同沙漠地区的表土中的微生物丰度和化学组成进行了分析。统计分析表明，微生物直接计数与钙浓度呈强烈正相关，与硅浓度呈负相关。虽然沙漠之间的差异是可以预期的，但令人感兴趣的是，在给定的沙漠地区内的采样点之间存在差异，这说明了沙漠环境中微生物群落的“斑块”性质。
