六観音御池,白紫池,大浪池の酸性湖堆積物における脂肪成分の特徴

概要

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Anteiso-compounds have been reported in moderately acidic lake sediments as biological markers (Fukushima et al., 1991a, b, 1993). In this study, we attempted to dectect anteiso-compounds in sediment cores from 3 acidic Lakes, Rokkannon, Byakushi and Onami in the Kirishima volcanos. Core lengths were 36cm, 22.5cm and 10cm respectively. Anteiso-ompounds were not identified, although anteiso-compounds had previously been identified in Lake Fudo in the Kirishima volcanos (Kondo et al., 1994). The composition of n-alkanes, n-alcohols and sterols in the sediment cores of the 3 lakes indicate a major contributiion of higher plants. The n-alkanes and n-alcohols may be have had a minor contribution from algae which had a much low abundance thanhigher plants. In the lower part of sediment layer (20-36cm) from Lake Rokkannon, phytol, dinostanol and stigmastanol were more abundant than in the upper part. The ratios of stanols to stenols in the sediments from Lake Byakushi and Onami are higher than the ratios at Lakes Kutsucharo and Akan in Hokkaido.
長崎大学教育学部の論文
1994-06-00