Hydrothermal vent chimney-base sediments as unique habitat for meiobenthos and nanobenthos: Observations on millimeter-scale distributions
Hydrothermal vents are critical to marine geochemical cycling and ecosystem functioning. Although hydrothermal vent-associated megafauna and chemoautotrophic prokaryotes have received extensive dedicated study, smaller hydrothermal vent-associated eukaryotes such as meiofauna and nanobiota have rece...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.1033381/full |
| _version_ | 1797955323025162240 |
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| author | Joan M. Bernhard Hidetaka Nomaki Takashi Shiratori Takashi Shiratori Anastasia Elmendorf Akinori Yabuki Katsunori Kimoto Masashi Tsuchiya Motohiro Shimanaga |
| author_facet | Joan M. Bernhard Hidetaka Nomaki Takashi Shiratori Takashi Shiratori Anastasia Elmendorf Akinori Yabuki Katsunori Kimoto Masashi Tsuchiya Motohiro Shimanaga |
| author_sort | Joan M. Bernhard |
| collection | DOAJ |
| description | Hydrothermal vents are critical to marine geochemical cycling and ecosystem functioning. Although hydrothermal vent-associated megafauna and chemoautotrophic prokaryotes have received extensive dedicated study, smaller hydrothermal vent-associated eukaryotes such as meiofauna and nanobiota have received much less attention. These communities comprise critical links in trophic flow and carbon cycling of other marine habitats, so study of their occurrence and role in hydrothermal vent ecosystems is warranted. Further, an understudied vent habitat is the thin sediment cover at the base of hydrothermal vent chimneys. An initial study revealed that sediments at the base of vent chimneys of the Izu-Ogawasara Arc system (western North Pacific) support metazoan meiofauna, but very little is known about the taxonomic composition and abundance of the meiobenthic protists and nanobiota, or their millimeter-scale distributions. Using the Fluorescently Labeled Embedded Coring method (FLEC), we describe results on meiofaunal and nanobiota higher-level identifications, life positions and relative abundances within sediments from three habitats (base of vent chimneys, inside caldera but away from chimneys, and outside caldera) of the Myojin-Knoll caldera and vicinity. Results suggest that the chimney-base community is unique and more abundant compared to non-chimney associated eukaryotic communities. Supporting evidence (molecular phylogeny, scanning and transmission electron microscopy imaging) documents first known hydrothermal-vent-associated occurrences for two protist taxa. Collectively, results provide valuable insights into a cryptic component of the hydrothermal vent ecosystem. |
| first_indexed | 2024-04-10T23:31:17Z |
| format | Article |
| id | doaj.art-f83afd328b6e4480a3c458a400d3ae82 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-10T23:31:17Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-f83afd328b6e4480a3c458a400d3ae822023-01-12T06:42:07ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-01-01910.3389/fmars.2022.10333811033381Hydrothermal vent chimney-base sediments as unique habitat for meiobenthos and nanobenthos: Observations on millimeter-scale distributionsJoan M. Bernhard0Hidetaka Nomaki1Takashi Shiratori2Takashi Shiratori3Anastasia Elmendorf4Akinori Yabuki5Katsunori Kimoto6Masashi Tsuchiya7Motohiro Shimanaga8Woods Hole Oceanographic Institution, Geology & Geophysics Department, Woods Hole, MA, United StatesInstitute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, JapanResearch Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, JapanFaculty of Life and Environmental Sciences, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, JapanWoods Hole Oceanographic Institution, Geology & Geophysics Department, Woods Hole, MA, United StatesResearch Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, JapanResearch Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, JapanResearch Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, JapanAitsu Marine Station, Kumamoto University, Kumamoto, JapanHydrothermal vents are critical to marine geochemical cycling and ecosystem functioning. Although hydrothermal vent-associated megafauna and chemoautotrophic prokaryotes have received extensive dedicated study, smaller hydrothermal vent-associated eukaryotes such as meiofauna and nanobiota have received much less attention. These communities comprise critical links in trophic flow and carbon cycling of other marine habitats, so study of their occurrence and role in hydrothermal vent ecosystems is warranted. Further, an understudied vent habitat is the thin sediment cover at the base of hydrothermal vent chimneys. An initial study revealed that sediments at the base of vent chimneys of the Izu-Ogawasara Arc system (western North Pacific) support metazoan meiofauna, but very little is known about the taxonomic composition and abundance of the meiobenthic protists and nanobiota, or their millimeter-scale distributions. Using the Fluorescently Labeled Embedded Coring method (FLEC), we describe results on meiofaunal and nanobiota higher-level identifications, life positions and relative abundances within sediments from three habitats (base of vent chimneys, inside caldera but away from chimneys, and outside caldera) of the Myojin-Knoll caldera and vicinity. Results suggest that the chimney-base community is unique and more abundant compared to non-chimney associated eukaryotic communities. Supporting evidence (molecular phylogeny, scanning and transmission electron microscopy imaging) documents first known hydrothermal-vent-associated occurrences for two protist taxa. Collectively, results provide valuable insights into a cryptic component of the hydrothermal vent ecosystem.https://www.frontiersin.org/articles/10.3389/fmars.2022.1033381/fullmeiofaunasediment micro-fabricmicroscale distributionbenthic foraminiferaprotistCiliophora |
| spellingShingle | Joan M. Bernhard Hidetaka Nomaki Takashi Shiratori Takashi Shiratori Anastasia Elmendorf Akinori Yabuki Katsunori Kimoto Masashi Tsuchiya Motohiro Shimanaga Hydrothermal vent chimney-base sediments as unique habitat for meiobenthos and nanobenthos: Observations on millimeter-scale distributions Frontiers in Marine Science meiofauna sediment micro-fabric microscale distribution benthic foraminifera protist Ciliophora |
| title | Hydrothermal vent chimney-base sediments as unique habitat for meiobenthos and nanobenthos: Observations on millimeter-scale distributions |
| title_full | Hydrothermal vent chimney-base sediments as unique habitat for meiobenthos and nanobenthos: Observations on millimeter-scale distributions |
| title_fullStr | Hydrothermal vent chimney-base sediments as unique habitat for meiobenthos and nanobenthos: Observations on millimeter-scale distributions |
| title_full_unstemmed | Hydrothermal vent chimney-base sediments as unique habitat for meiobenthos and nanobenthos: Observations on millimeter-scale distributions |
| title_short | Hydrothermal vent chimney-base sediments as unique habitat for meiobenthos and nanobenthos: Observations on millimeter-scale distributions |
| title_sort | hydrothermal vent chimney base sediments as unique habitat for meiobenthos and nanobenthos observations on millimeter scale distributions |
| topic | meiofauna sediment micro-fabric microscale distribution benthic foraminifera protist Ciliophora |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.1033381/full |
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