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DOI Ryoichi Faculty of Sociology Department of Sociology Professor

■ Title
Doi & Puriyakorn 2006. Significance of air-drying soils in profiling the culturable bacterial communities

■ Outline
  This study clarified significance of air-drying of soils in profiling the culturable bacterial communities. We profiled soils of a tropical forest and bare ground as a result of deforestation and subsequent land degradation. The Biolog Gram-negative method better discriminated between the soils at their field moisture conditions, whereas the antibiotic disk diffusion method better discriminated between the air-dried soils than between the moist soils. The Biolog method showed that the forest soil was richer in functional diversity when the moist soils were compared. But this relationship reversed for the air-dried sample set. Redundancy analysis ordination diagrams showed that the air-drying treatment did not affect the most significant part of variation in soil bacterial community profile, while the air-drying treatment significantly affected the minor parts according to changes in Wilk's lambda value. These results and previous reports indicated multidimensional effects of temporal changes in soil moisture content on culturable soil bacterial community profile. The strategy to circumvent such complication caused by changes in soil moisture content in utilization of the information is discussed.
  Doi, R. and Puriyakorn, B.
  Collaboration   Int J Ecol Environ Sci   32   2006