Abstract
Microbiological studies of the Higashiyama oil mining field where oil was recovered by mining were carried out. Microflora of this oil-gallery consisted of taxonomically limited kinds of microorganisms such as Pseudomonas, Aspergillus, and unidentified black molds which probably belonged to Dematiaceae. In oil-rich sands, considerable numbers of pseudomonads and black molds were found, but aspergilli were isolated only from oil-poor sands. A relationship between depth from the gallery wall and microorganisms and the gradual succession in the microflora was also presented. The presence of petroleum was deduced as the most important factor controlling the microflora.
This paper was read at the Annual Meeting of the Agricultural Chemical Society of Japan held on April 10, 1959.
