Marine Biology

, Volume 153, Issue 4, pp 493–506 | Cite as

Spatial changes in the distributions of deep-sea “Cerviniidae” (Harpacticoida, Copepoda) and their associations with environmental factors in the bathyal zone around Sagami Bay, Japan

  • M. ShimanagaEmail author
  • H. Nomaki
  • K. Iijima
Research Article


To estimate species turnover rates on scales of several tens of km in deep-sea benthic animals, we analyzed spatial and inter-annual changes in species diversity and composition of cerviniids, a typical group of deep-sea harpacticoids, at stations in and around Sagami Bay, central Japan. Associations with environmental factors were also investigated. Generally, bathymetrical patterns in diversity of benthos are unimodal and peak at depths of 2,000–3,000 m. In Sagami Bay, cerviniid diversity did not follow this trend; both species richness and evenness were negatively correlated with water depth. Multivariate analyses [detrended correspondence analysis (DCA) and non-metric multi-dimensional scaling] suggested that temporal changes in species composition of cerviniids are smaller than spatial changes that occur on horizontal scales of several tens of km. Community structure does not change completely on these scales in the bathyal zone around Sagami Bay. DCA also showed that bathymetrical changes in species composition can be regulated by certain factors associated with water depth.


Meiofauna Detrended Correspondence Analysis Adult Density Harpacticoids Detrended Correspondence Analysis Axis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We are grateful to the officers and crew members of the research vessel Tansei-maru of the independent administrative institution, the Japan Agency for Marine–Earth Science and Technology (JAMSTEC). We also thank Dr. W. Lee who helped to identify males of N. itoi. Special thanks to two anonymous reviewers who kindly checked our manuscript. This study was partly supported by a grant from the Ministry of Education, Sports, Culture, Science, and Technology of Japan (No. 16770012), and complied with the current laws of Japan where it was performed.


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Aitsu Marine Station, Center for Marine Environment StudiesKumamoto UniversityKumamotoJapan
  2. 2.Institute for Research on Earth Evolution (IFREE)Japan Agency for Marine–Earth Science and TechnologyYokosukaJapan

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