Seasonal Patterns of Vertical Distribution between Meiofaunal Groups in Relation to Phytodetritus Deposition in the Bathyal Sagami Bay, Central Japan |
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| Authors: | Motohiro Shimanaga Hiroshi Kitazato Yoshihisa Shirayama |
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| Institution: | (1) Ocean Research Institute, University of Tokyo, 1-15-1, Minami-dai, Nakano, Tokyo, 164-8639, Japan;(2) Department of Life and Earth Sciences, Shizuoka University, Oya, Shizuoka, 422-8529, Japan;(3) Seto Marine Biological Laboratory, Graduate School of Science, Kyoto University, Shirahama-cho, Wakayama, 649-2211, Japan |
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| Abstract: | Temporal changes in the vertical distribution of metazoan meiofaunal groups were examined at a bathyal site (depth 1450 m) in Sagami Bay from December 1996 to August 1998. Among major meiofaunal groups, the vertical distributions of copepods (adults and copepodites), and kinorhynchs changed seasonally and they concentrated in the shallower part in the sediment profile when CPE concentrations were higher. Seasonal changes in the vertical distributions of ovigerous females and nauplii of copepods were not related to CPE concentrations, but related to that of total copepods. On the other hand, nematodes, ostracods, and polychaetes did not show seasonal migrations. These results suggest that there is a difference in the response to the sedimentation of organic matter between metazoan meiofaunal taxa. |
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| Keywords: | Vertical distribution metazoan meiofauna Sagami Bay food supply seasonality |
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