| 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(ポスター発表) P1-037  (Poster presentation)

季節・環境・生物間相互作用の各要因がアマモ場無脊椎動物の時空間動態に与える影響
Influence of temporal, environmental, and species interaction factors on the spatio-temporal dynamics of invertebrates in eelgrass beds

*難波瑞穂(北海道大学), 阿部博哉(国立環境研究所), 伊藤美菜子(北海道大学), 仲岡雅裕(北海道大学)
*Mizuho NAMBA(Hokkaido Univ.), Hiroya ABE(NIES), Minako ITO(Hokkaido Univ.), Masahiro NAKAOKA(Hokkaido Univ.)

Understanding the relative importance of multiple factors influencing spatio-temporal variations of productions by invertebrates is an important goal in coastal marine ecosystems. We studied multiple functional groups of invertebrates (i.e. grazers, predators, and suspension feeders) in eelgrass (Zostera marina) ecosystems along salinity gradients to 1) evaluate the relative importance of environmental (salinity and water temperature), spatial, and temporal factors and primary producer biomass on spatio-temporal variations in invertebrate biomass, a proxy for production, and to 2) compare the patterns between Akkeshi and Notoro, lagoons with and without a strong gradient respectively. Multiple regressions on distance matrices (MRM) followed by variation partitioning were used for the analyses. Grazer biomass was most affected by the spatial factor, followed by the temporal factor and biomass of epiphytic microalgae in Akkeshi but not in Notoro. Predator biomass was explained by water temperature in Notoro but not in Akkeshi. Suspension feeder biomass was most affected by the spatial factor and microphytobenthos biomass in Akkeshi and by eelgrass biomass in Notoro. We conclude that the relative importance of each factor varied among the functional groups and suggest the importance of the gradients and resource availability on the spatio-temporal variations of invertebrate productions in eelgrass ecosystems.


日本生態学会