Combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the Eastern Antarctic Peninsula
This study provides a snapshot of the largely understudied meiobenthic and nematode communities in the Prince Gustav Channel (PGC) and Duse Bay (DB). We compared five stations sampled at different water depths along the shelf and investigated their meiobenthic community structure. We approached nema...
Published in: | Frontiers in Marine Science |
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2021
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ftunivgent:oai:archive.ugent.be:8724481 2023-06-11T04:05:53+02:00 Combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the Eastern Antarctic Peninsula Pantò, Gabriella Pasotti, Francesca Macheriotou, Lara Vanreusel, Ann 2021 application/pdf https://biblio.ugent.be/publication/8724481 http://hdl.handle.net/1854/LU-8724481 https://doi.org/10.3389/fmars.2021.629706 https://biblio.ugent.be/publication/8724481/file/8724483 eng eng https://biblio.ugent.be/publication/8724481 http://hdl.handle.net/1854/LU-8724481 http://dx.doi.org/10.3389/fmars.2021.629706 https://biblio.ugent.be/publication/8724481/file/8724483 Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) info:eu-repo/semantics/openAccess FRONTIERS IN MARINE SCIENCE ISSN: 2296-7745 Biology and Life Sciences Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography Eastern Antarctic Peninsula benthos nematodes Prince Gustav Channel Duse Bay metabarcoding ASVs biodiversity WEDDELL SEA MARINE NEMATODES PHYTOPLANKTON ASSEMBLAGES MEIOFAUNA COMMUNITIES B EMBAYMENTS ICE-SHELF LARSEN PATTERNS GLACIER COLONIZATION journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftunivgent https://doi.org/10.3389/fmars.2021.629706 2023-04-19T22:10:36Z This study provides a snapshot of the largely understudied meiobenthic and nematode communities in the Prince Gustav Channel (PGC) and Duse Bay (DB). We compared five stations sampled at different water depths along the shelf and investigated their meiobenthic community structure. We approached nematode biodiversity combining traditional taxonomic identification and high throughput sequencing (HTS), with the use of Amplicon Sequence Variants (ASVs). Additionally, we characterized the environment by primary production proxies, grain size and seasonal ice conditions. Our results suggest that the availability of organic matter and its freshness are responsible for the high densities found at all depths. However, potential factors influencing the high local and regional variability of meiofauna density and biodiversity are less clear. A bathymetric transect consisting of three stations in DB (200, 500, and 1,000 m depth) showed increasing pigment concentrations in the first centimeters of the sediment vertical profile with increasing water depth, whereas the meiofauna densities showed the opposite trend. The deepest station of DB seems to function as a sink for fine material as supported by the higher silt fraction and higher organic matter concentrations. When comparing the two basins in the PGC (1,000 and 1,250 m) and the one in DB (1,000 m), differences in terms of environmental variables, meiofaunal densities, and composition were observed. The deepest basin in PGC is located further South (closer to the highly unstable Larsen area), and marked differences with the other basins suggest that it might be experiencing different conditions as a result of its presence near the summer ice margin and its more elongated topography. Both, the shallowest and the deepest stations showed the highest number of unique sequences, suggesting a more biodiverse nematode assemblage. The morphological identification did not show significant differences in the biodiversity of all stations, differently from the ASVs approach. ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Shelf Weddell Sea Ghent University Academic Bibliography Antarctic Antarctic Peninsula Weddell Sea Weddell Prince Gustav Channel ENVELOPE(-58.250,-58.250,-63.833,-63.833) Duse ENVELOPE(-57.266,-57.266,-63.548,-63.548) Duse Bay ENVELOPE(-57.333,-57.333,-63.500,-63.500) Frontiers in Marine Science 8 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography Eastern Antarctic Peninsula benthos nematodes Prince Gustav Channel Duse Bay metabarcoding ASVs biodiversity WEDDELL SEA MARINE NEMATODES PHYTOPLANKTON ASSEMBLAGES MEIOFAUNA COMMUNITIES B EMBAYMENTS ICE-SHELF LARSEN PATTERNS GLACIER COLONIZATION |
spellingShingle |
Biology and Life Sciences Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography Eastern Antarctic Peninsula benthos nematodes Prince Gustav Channel Duse Bay metabarcoding ASVs biodiversity WEDDELL SEA MARINE NEMATODES PHYTOPLANKTON ASSEMBLAGES MEIOFAUNA COMMUNITIES B EMBAYMENTS ICE-SHELF LARSEN PATTERNS GLACIER COLONIZATION Pantò, Gabriella Pasotti, Francesca Macheriotou, Lara Vanreusel, Ann Combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the Eastern Antarctic Peninsula |
topic_facet |
Biology and Life Sciences Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography Eastern Antarctic Peninsula benthos nematodes Prince Gustav Channel Duse Bay metabarcoding ASVs biodiversity WEDDELL SEA MARINE NEMATODES PHYTOPLANKTON ASSEMBLAGES MEIOFAUNA COMMUNITIES B EMBAYMENTS ICE-SHELF LARSEN PATTERNS GLACIER COLONIZATION |
description |
This study provides a snapshot of the largely understudied meiobenthic and nematode communities in the Prince Gustav Channel (PGC) and Duse Bay (DB). We compared five stations sampled at different water depths along the shelf and investigated their meiobenthic community structure. We approached nematode biodiversity combining traditional taxonomic identification and high throughput sequencing (HTS), with the use of Amplicon Sequence Variants (ASVs). Additionally, we characterized the environment by primary production proxies, grain size and seasonal ice conditions. Our results suggest that the availability of organic matter and its freshness are responsible for the high densities found at all depths. However, potential factors influencing the high local and regional variability of meiofauna density and biodiversity are less clear. A bathymetric transect consisting of three stations in DB (200, 500, and 1,000 m depth) showed increasing pigment concentrations in the first centimeters of the sediment vertical profile with increasing water depth, whereas the meiofauna densities showed the opposite trend. The deepest station of DB seems to function as a sink for fine material as supported by the higher silt fraction and higher organic matter concentrations. When comparing the two basins in the PGC (1,000 and 1,250 m) and the one in DB (1,000 m), differences in terms of environmental variables, meiofaunal densities, and composition were observed. The deepest basin in PGC is located further South (closer to the highly unstable Larsen area), and marked differences with the other basins suggest that it might be experiencing different conditions as a result of its presence near the summer ice margin and its more elongated topography. Both, the shallowest and the deepest stations showed the highest number of unique sequences, suggesting a more biodiverse nematode assemblage. The morphological identification did not show significant differences in the biodiversity of all stations, differently from the ASVs approach. ... |
format |
Article in Journal/Newspaper |
author |
Pantò, Gabriella Pasotti, Francesca Macheriotou, Lara Vanreusel, Ann |
author_facet |
Pantò, Gabriella Pasotti, Francesca Macheriotou, Lara Vanreusel, Ann |
author_sort |
Pantò, Gabriella |
title |
Combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the Eastern Antarctic Peninsula |
title_short |
Combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the Eastern Antarctic Peninsula |
title_full |
Combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the Eastern Antarctic Peninsula |
title_fullStr |
Combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the Eastern Antarctic Peninsula |
title_full_unstemmed |
Combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the Eastern Antarctic Peninsula |
title_sort |
combining traditional taxonomy and metabarcoding : assemblage structure of nematodes in the shelf sediments of the eastern antarctic peninsula |
publishDate |
2021 |
url |
https://biblio.ugent.be/publication/8724481 http://hdl.handle.net/1854/LU-8724481 https://doi.org/10.3389/fmars.2021.629706 https://biblio.ugent.be/publication/8724481/file/8724483 |
long_lat |
ENVELOPE(-58.250,-58.250,-63.833,-63.833) ENVELOPE(-57.266,-57.266,-63.548,-63.548) ENVELOPE(-57.333,-57.333,-63.500,-63.500) |
geographic |
Antarctic Antarctic Peninsula Weddell Sea Weddell Prince Gustav Channel Duse Duse Bay |
geographic_facet |
Antarctic Antarctic Peninsula Weddell Sea Weddell Prince Gustav Channel Duse Duse Bay |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Weddell Sea |
op_source |
FRONTIERS IN MARINE SCIENCE ISSN: 2296-7745 |
op_relation |
https://biblio.ugent.be/publication/8724481 http://hdl.handle.net/1854/LU-8724481 http://dx.doi.org/10.3389/fmars.2021.629706 https://biblio.ugent.be/publication/8724481/file/8724483 |
op_rights |
Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2021.629706 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1768377573450973184 |