5:15 PM - 6:30 PM
[ACC20-P10] Differences of physical and chemical conditions between green and red algal snow appeared in mountain regions in Japan
Keywords:Snow algae, Mt. Gassan, Mt. Tateyama
The purpose of this study is to describe the algal community and environment conditions of green and red algal snow appeared in mountain regions in Japan. We collected the colored snow samples in the melting season of 2015 in Mt. Gassan (green snow) in Yamagata prefecture and in Mt. Tateyama (red snow) in Toyama prefecture, Japan. We analyzed microscopic morphology and abundance of snow algal cells, chlorophyll-a concentrations, absorption spectrum of their pigments, and soluble chemical composition in the snow samples. Both green and red snow samples contained abundant snow algal cells. The depth of the snow at the study sites was more than 120 cm. The vertical distribution of algal cells in the snow pack showed that they were abundant at the surface layers. There were significant differences in ammonium and phosphate concentrations in the surface snow between green and red snows. This suggest that nutrient condition is one of the factors to determine the color of algal snow.