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Marine Biology

, Volume 161, Issue 8, pp 1775–1785 | Cite as

Nematode community composition in hydrothermal vent and adjacent non-vent fields around Myojin Knoll, a seamount on the Izu-Ogasawara Arc in the western North Pacific Ocean

  • Yuka Setoguchi
  • Hidetaka Nomaki
  • Tomo Kitahashi
  • Hiromi Watanabe
  • Koji Inoue
  • Nanako O. Ogawa
  • Motohiro ShimanagaEmail author
Original Paper

Abstract

In contrast to specific large benthic invertebrates in chemosynthetic ecosystems such as hydrothermal vents, meiofaunal communities in such habitats have been reported to have strong taxonomic overlap with meiofauna in the adjacent “normal” environments. However, meiofauna have only recently been included in studies of those environments and detailed information on these communities is still rare. This is especially true in the Northwest Pacific Ocean, even though there are many seamounts with active vents in the calderas of the region. Nematode community composition at the genus level in sediments from a hydrothermal vent field in the caldera of Myojin Knoll (32°06′N, 139°52′E, depth 1,300 m), a seamount on the Izu-Ogasawara Arc, Japan, was investigated for the first time and was compared with adjacent non-vent areas inside and outside the caldera. Multivariate analyses showed that the composition of nematodes in the hydrothermal field was significantly different from that in the non-hydrothermal fields around the caldera. However, the common genera, such as Oxystomina, Pareudesmoscolex, Desmoscolex, and Microlaimus were found in two, or all three vent fields while their rank contributions differed among the three fields. When the data from Myojin Knoll were compared with those from other deep-sea vent environments in different regions (e.g., North Fiji Basin, East Pacific Rise, Mid-Atlantic Ridge), the nematode composition in the vent field of the Myojin caldera was more similar to that of the non-vent fields around the caldera than the composition in vent fields of other regions. These data from the Northwest Pacific Ocean also suggest the absence of long-range transport systems and local adaptations for meiofauna in hydrothermal vent fields.

Keywords

Total Organic Carbon Meiofauna Okinawa Trough Nematode Community Total Organic Carbon Concentration 
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.

Notes

Acknowledgments

We are grateful to the crews and staff of the RV Natsushima and the ROV Hyper-Dolphin of the Japan Agency for Marine-Earth Science and Technology (JAMSTEC). Special thanks to two anonymous reviewers, who kindly checked our manuscript.

Supplementary material

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Yuka Setoguchi
    • 1
  • Hidetaka Nomaki
    • 2
  • Tomo Kitahashi
    • 3
  • Hiromi Watanabe
    • 2
  • Koji Inoue
    • 3
  • Nanako O. Ogawa
    • 2
  • Motohiro Shimanaga
    • 1
    Email author
  1. 1.Aitsu Marine Station, Center for Marine Environment StudiesKumamoto UniversityKami-amakusaJapan
  2. 2.Japan Agency for Marine-Earth Science and Technology (JAMSTEC)YokosukaJapan
  3. 3.Atmosphere and Ocean Research InstituteThe University of TokyoKashiwaJapan

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