|| 要旨トップ | 目次 |||日本生態学会第66回全国大会 (2019年3月、神戸) 講演要旨
一般講演（ポスター発表） P1-235 （Poster presentation）
the Many macroinvertebrates inhabit as larvae in the underground of river bed (hyporheic zone), known as hyporheos and by becoming adults move toward terrestrial ecosystem. We determined how far hyporheos could transfer aquatic resources and compared between the fluxes generated by hyporheos and other aquatic macroinvertebrates (EPT) toward the terrestrial ecosystem. We worked on 16.43km of the Satsuani river reach to collect hyporheic larvae (2016-18) using colonization traps; and adults (2017-18) using malaise traps and sweep nets. We also used larvae δ15N based process to estimate adults’ longitudinal traveling distance. Laterally, 50% of female and male hyporheos traveled 17.23 and 23.69m, respectively showing female stayed closer to the river. Longitudinally, 50% of hyporheos traveled 5105.58m to upstream revealing they traveled longer distance than laterally. During the highest adult hyporheos abundance month-July, laterally, mean fluxes of hyporheos and EPT were 6.21 and 4.36 mgDW/m2/day, respectively demonstrating hyporheos transferred more resources than EPT; and longitudinally, hyporheos moved less flux than EPT (mean: 0.38 and 10.31 mgDW/m2/day, respectively) indicating hyporheos transferred more resources to land than staying on the river. Overall, hyporheos and EPT contributed almost 50-50% of aquatic resources laterally whereas, about 4 and 96%, respectively longitudinally of the river.