| 要旨トップ | 目次 | 日本生態学会第69回全国大会 (2022年3月、福岡) 講演要旨
ESJ69 Abstract


一般講演(ポスター発表) P2-105  (Poster presentation)

海氷中の狭いブライン空間に生息する藻類種は群体や細胞サイズを小さくしている 【B】
Algal species inhabiting in small space of brines in sea ice need smaller colonies and cell sizes than planktonic ones 【B】

*川延京子(神奈川大学大学院), 工藤栄(国立極地研究所), 鈴木祥弘(神奈川大学)
*Kyoko KAWANOBE(Grad. School of Kanagawa Univ.), Sakae KUDOH(National Inst. of Polar Res.), Yoshihiro SUZUKI(Kanagawa Univ.)

An increase in the proportion of thin first-year ice due to the recent global warming alters the dynamics of arctic ecosystem. In these thin ice, massive blooms of micro algal communities are often found, and may play an important role as primary producers. In February-March 2020, ice algal communities blooming at Saroma-ko lagoon were analyzed. Quantum-yield of photosystem II of the community showed higher activities of photosynthesis and responses to the light conditions in the ice. Cell sizes of the community tended to decrease in the upper layers. Especially the dominant species of Detonula confervacea (Cleve) Gran decreased its cell size in the upper layers of sea ice. The volume of the cells inhabiting upper layer was 44% lower than those inhabiting bottom layers. These characteristic responses of ice algal species suggested the differences from the planktonic algae.


日本生態学会