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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第70巻 第1号 >
Vertical Distribution, Community Structure, and Active Carbon Flux of Two Macrozooplankton Taxa : Amphipods and Euphausiids in the Summer of the Western North Pacific
| Title: | Vertical Distribution, Community Structure, and Active Carbon Flux of Two Macrozooplankton Taxa : Amphipods and Euphausiids in the Summer of the Western North Pacific |
| Authors: | Hanamiya, Yurika Browse this author | | Murase, Hiroto Browse this author | | Matsuno, Kohei Browse this author →KAKEN DB | | Yamaguchi, Atsushi Browse this author →KAKEN DB |
| Keywords: | Active carbon flux | | Biological pump | | Phronima spp. | | Themisto pacifica | | Primno abyssalis | | Vibilia gibbosa | | Euphausia spp. | | Nematoscelis spp. | | Thysanoessa spp. | | Stylocheiron spp. |
| Issue Date: | 24-Aug-2020 |
| Publisher: | 北海道大学大学院水産科学研究院 |
| Journal Title: | 北海道大学水産科学研究彙報 |
| Journal Title(alt): | Bulletin of Fisheries Sciences, Hokkaido University |
| Volume: | 70 |
| Issue: | 1 |
| Start Page: | 77 |
| End Page: | 89 |
| Abstract: | This study conducted diel vertical migration and active migration flux estimation of macrozooplanktonic amphipods and euphausiids at 0-250 m water column of the three stations in the western North Pacific during summer. For amphipods, 25 species belonging to 17 genera were identified. Their standing stock was 60-574 ind. m−2 during the daytime and 35-5,228 ind. m−2 at night-time. For euphausiids, 19 species belonging to 7 genera were identified. The standing stock of euphausiids was 80-382 ind. m−2 and 286-2,156 ind. m−2 during the day and at night, respectively. Feeding impacts during the night were estimated to be 0.19-11.76 mg C m−2 day−1 (amphipods) and 5.12-16.42 mg C m−2 day−1 (euphausiids). Respiration during the daytime accounted for 0.08-6.38 mg C m−2 day−1 (amphipods) and 2.33-7.70 mg C m−2 day−1 (euphausiids). The feeding impact and respiratory flux by active migration of macrozooplankton taxa were estimated as 8.34-28.18 mg C m−2 day−1 and 3.15-14.08 mg C m−2 day−1, respectively. These values corresponded to 3.7-12.4% of primary production (feeding impact) and 2.4-10.7% of sinking passive flux from the euphotic zone (respiratory flux). Thus, this study emphasizes the importance of active flux by macrozooplankton for vertical material flux in the western North Pacific. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/79118 |
| Appears in Collections: | 北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第70巻 第1号
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