Impacts of diel vertical migration of the copepod Metridia pacifica on primary production and respiratory carbon flux in the subarctic Pacific Ocean
Abstract
Respiratory oxygen consumption rates (at the two temperatures of 0-50 m and 50-200 m depth strata) and day/night biomass in the top 50 m water column were determined on adult female Metridia pacifica at twelve stations in the western/ eastern subarctic Pacific and one station in the oceanic Bering Sea during summer. At each station, the respiration rates at 0-50 m depth temperatures were used to estimate ingestion rates during nighttime by assuming empirical carbon budget efficiencies, and rates at 50-200 m to estimate respiratory carbon flux during daytime. The abundance of the females in the upper 50 m at night varied between 27 and 5,422 inds. m−2 and no specimen was collected from the same layer at daytime throughout the stations. The size of the females varied regionally from 25 to 77 μg C ind.−1. As a result, diel vertical migrant biomass of the females varied greatly from one station to the next (1 and 309 mg C m−2). Weight-specific respiration rates of the females were 2.2-6.3 μl O2 mg C−1 h−1, which was a function of experiment temperatures and body mass (C) of the females. Taking into account of residence time at 0-50 m and 50-200 m in the day, daily population ingestion was estimated as 0.04-11.04 mg C m−2 day−1, which accounted for 0-2.4% of primary production at each station. Daily population respiration in the 50-200 m was calculated as 0.02-9.39 mg C m−2 day−1, which corresponds to 0-10% of the POC flux down from the euphotic zone.
Journal
-
- 北海道大学水産科学研究彙報
-
北海道大学水産科学研究彙報 71 (1), 29-37, 2021-08-03
北海道大学大学院水産科学研究院
- Tweet
Details 詳細情報について
-
- CRID
- 1390572175529440768
-
- NII Article ID
- 120007126035
-
- ISSN
- 24353353
-
- HANDLE
- 2115/82350
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- IRDB
- CiNii Articles
- KAKEN
-
- Abstract License Flag
- Allowed
