日本地球惑星科学連合2018年大会

講演情報

[EJ] Eveningポスター発表

セッション記号 B (地球生命科学) » B-PT 古生物学・古生態学

[B-PT05] 化学合成生態系の進化をめぐって

2018年5月24日(木) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:ジェンキンズ ロバート(金沢大学理工研究域自然システム学系)、渡部 裕美(海洋研究開発機構)、延原 尊美(静岡大学教育学部理科教育講座地学教室)

[BPT05-P02] Epifauna on a deep-sea hydrothermal vent squat lobster, Shinkaia crosnieri, in the Izena Hole of the Okinawa Trough

唐澤 舞2、*渡部 裕美1三宅 裕志2 (1.海洋研究開発機構、2.北里大学)

キーワード:生物多様性

Relationships between foundation species and their associating animals provide baseline knowledge towards elucidating biodiversity. Here, we report epibiotic animals associating with a foundation species, the squat lobster Shinkaia crosnieri, in a deep-sea hydrothermal vent field in the Okinawa Trough, Northwest Pacific, and discuss their relationships. The epibiotic fauna recorded on S. crosnieri included Amphisamytha sp., dirivultid copepod, and Lepetodrilus nux. Of note, the number of individuals of Amphisamytha sp. increased with increasing size of S. crosnieri. In particular, one S. crosnieri individual had more than 300 individuals of the dirivultid copepod, L. nux, and more than 30 individuals of Amphisamytha sp. attached to it. The results suggested that older individuals host more epifauna, contributing to greater biodiversity. Furthermore, aggregations of individuals increased habitat heterogeneity, resulting in their hosting more species.