| 要旨トップ | 目次 | 日本生態学会第68回全国大会 (2021年3月、岡山) 講演要旨
ESJ68 Abstract


一般講演(口頭発表) G03-06  (Oral presentation)

群集平均栄養段階から推定する海洋動物プランクトン群集のバイオマスピラミッド
Biomass pyramids of marine zooplankton communities as inferred from their integrated trophic positions

*石川尚人(海洋研究開発機構), 田所和明(水産研究・教育機構), 松林順(中央大学), 大河内直彦(海洋研究開発機構)
*Naoto F. ISHIKAWA(JAMSTEC), Kazuaki TADOKORO(FRA), Jun MATSUBAYASHI(Chuo University), Naohiko OHKOUCHI(JAMSTEC)

Biomass pyramids in natural food webs provide insights into multitrophic ecosystem functioning. We measured the integrated trophic position (iTP), which reflects the average efficiency of biomass transfer through trophic pathways, of 14 mesozooplankton communities in the North Pacific. Compound-specific nitrogen isotope analysis of amino acids (CSIA-AA) for composite mesozooplankton biomass indicated that iTP of marine mesozooplankton communities was negatively correlated with species diversity. Offshore communities with lower diversity and higher iTP were dominated by large copepods such as Neocalanus, whereas onshore communities with higher diversity and lower iTP were characterized by several species belonging to Calanus, Paracaranidae, Eucalanidae, and Metridinidae. The observed iTP values (2.36 ± 0.32) indicate different topologies in biomass pyramids in different sites, where inverted pyramids are found in less diverse communities. The results suggest that the iTP values of marine mesozooplankton communities and their biomass pyramids are essentially controlled by biodiversity, body size, and species turnover.


日本生態学会