1:45 PM - 2:00 PM
[ACC38-01] Environmental factors associated with snow algal bloom in the deciduous forest of Mt. Gassan, Yamagata prefecture, Japan
Keywords: snow algae, nutrients, deciduous forest
Field observations revealed that algal green snow appeared patchy after the late April. The algal patches were frequently observed in the snow surface under trees compared with the open sunny surface. The chlorophyll-a concentration in the surface snow gradually increased during the study period. The analysis of major soluble ions revealed that the phosphate concentration in the surface snow under the trees increased up to 51.4 μeq/L while it in the open snow surface kept low value during the study period. Results suggest that the phosphate is supplied with rain water from canopy of the trees to the snow surface and that it causes the patchy algal bloom on the snow surface.