J.Technology and Education, Vol.33, No.1, pp.1-7 (2026)
研究論文

福井県若狭湾海岸から取得した球状藻類の特性について

 

高山 勝己^*，上山 遼大，後反 克典

福井工業高等専門学校　物質工学科（〒916-8507福井県鯖江市下司町）

*takayama@fukui-nct.ac.jp

 

Characteristics of Spherical Algae Collected from the Coastal Area of Wakasa Bay, Fukui Prefecture

 

Katsumi TAKAYAMA*, Ryota UEYAMA and Katsunori GOTAN

Department of Chemistry & Biology Engineering, National Institute of Technology, Fukui College

(Geshi-cho, Sabae 916-8507, Japan)

 

(Received January 16, 2026; Accepted February 20, 2026)

 

　　Algae that grow in a spherical form were isolated from the coastal area of the Ogawa district in Wakasa Town, Mikata-Kaminaka County, Fukui Prefecture. The spherical algae are estimated to be a species closely related to Ulvella leptochaete. They grow to approximately 5?10 mm in diameter, are soft and elastic overall, have a smooth green surface, and possess a small cavity and ring-like structures resembling growth rings in the center. Optimal growth conditions were observed when cultured in Daigo IMK artificial seawater medium at a temperature of 20?°C, pH 7.9, under white light with an intensity of about PPFD 50?μmol/m2・s, and at a 2% NaCl concentration. A comparison of the mineral content of spherical algae with that of wakame seaweed (Undaria pinnatifida) revealed that the former contains higher levels of potassium, calcium, and magnesium.

Keywords: Spherical algae, Ulvella leptochaete, Marine environment