著者

山本 鎔子

出版者

Japanese Society of Microbial Ecology / The Japanese Society of Soil Microbiology

雑誌

Bulletin of Japanese Society of Microbial Ecology(日本微生物生態学会報) (ISSN:09117830)

巻号頁・発行日

vol.2, no.2, pp.77-88, 1988-03-31 (Released:2009-10-05)

参考文献数

50

被引用文献数

3 6

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Seasonal distribution patterns of agents which lyse cyanobacteria in lakes and rivers were studied. Higher numbers were detected in a warmer and more polluted. It is possile that cyanobacter development is controlled by these agents. The characteristics of various agents including protozoa, fungi, bacteria and viruses also were discussed.

著者

山本 鎔子

出版者

北海道大学低温科学研究所 = Institute of Low Temperature Science, Hokkaido University

雑誌

低温科学 (ISSN:18807593)

巻号頁・発行日

vol.70, pp.1-8, 2012

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雪が着色する現象は世界の山岳地帯や極地でしばしば観察されている. 最も普通にみられるのは赤雪でその多くはChlamydomonas のような単細胞性の緑藻が原因である. しかし本報告の尾瀬においては4月から5月かけての融雪期にみられる大規模な雪の赤褐色化は, 直径約10μm の球もしくは楕円状の赤褐色粒子によるものである. 赤褐色の原因は単細胞性の緑藻Hemitoma 胞子の被殻に多量に含まれる酸化鉄が原因である.Spring red snow phenomenon is frequently observed in alpine and polar environments with extremely low temperature, high light intensity, and low nutrient levels around the world. The red snow phenomenon is mostly caused by the green algae such as Chlamydomons and Chloromonas, and its reddish color is derived from carotenoids in the algae's vacuoles. However, we have recently found that the red snow in Oze National Park in Japan is caused by the green algae, Hemitoma, and its reddish color is caused by Fe-oxide accumulating at the surface of spores in the alga. Therefore, the cause of the red snow is divergent. In this review, we overview recent knowledge of the algae-dependent red snow.

著者

山本 鎔子 渡辺 篤

出版者

公益財団法人 服部植物研究所

雑誌

蘚苔地衣雑報 (ISSN:00372277)

巻号頁・発行日

vol.6, no.2, pp.20_2-21, 1972-01-31 (Released:2023-06-07)