Abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the North Water (Arctic Ocean)
In the Arctic Ocean copepods transfer energy produced by autotrophs to higher trophic levels. Net tows have long been used as the main zooplankton sampling tool but can hardly indicate the abundance and distribution of these animals on a fine-scale level. The LOKI (Lightframe On-sight Keyspecies Inv...
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ftzenodo:oai:zenodo.org:159297 2024-09-15T17:53:18+00:00 Abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the North Water (Arctic Ocean) Gonthier, Kevin 2016-10-04 https://doi.org/10.5281/zenodo.159297 unknown Zenodo https://doi.org/ https://doi.org/10.5281/zenodo.159297 oai:zenodo.org:159297 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Arctic Ocean North Water Polynya Copepods Optical underwater imaging Automatic Species identification Lightframe On-sight Keyspecies Investigation) LOKI Fine-scale vertical distribution info:eu-repo/semantics/doctoralThesis 2016 ftzenodo https://doi.org/10.5281/zenodo.159297 2024-07-26T11:00:38Z In the Arctic Ocean copepods transfer energy produced by autotrophs to higher trophic levels. Net tows have long been used as the main zooplankton sampling tool but can hardly indicate the abundance and distribution of these animals on a fine-scale level. The LOKI (Lightframe On-sight Keyspecies Investigation) is an in-situ optical underwater imaging device capable of recording the vertical distribution of zooplankton at a scale of ~30-60 cm. Using this device, the fine-scale distribution of the key herbivorous copepods Calanus glacialis and C. hyperboreus as well as that of the omnivore Metridia longa was analyzed. It was investigated how the fine-scale vertical distribution of copepods was coupled to fluorescence of microalgae during the phytoplankton bloom and how that pattern differed between eastern and western North Water Polynya. Eastern and western NOW showed substantial differences in the fluorescence of microalgae which seemed to influence the fine-scale copepod distribution. Whereas copepod abundance and fluorescence seemed almost vertically separated on the Canadian side of the polynya, the abundance of the same taxa showed a strong vertical coupling with fluorescence on the Greenland side. The results suggest a strong influence of physical parameters in the NOW (e.g. temperature and upwelling), likely governed by the West Greenland Current and Baffin Island Current, on microalgae and hence fine-scale zooplankton distribution. Doctoral or Postdoctoral Thesis Arctic Ocean Baffin Island Baffin Calanus glacialis Greenland Phytoplankton Zooplankton Copepods Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Arctic Ocean North Water Polynya Copepods Optical underwater imaging Automatic Species identification Lightframe On-sight Keyspecies Investigation) LOKI Fine-scale vertical distribution |
spellingShingle |
Arctic Ocean North Water Polynya Copepods Optical underwater imaging Automatic Species identification Lightframe On-sight Keyspecies Investigation) LOKI Fine-scale vertical distribution Gonthier, Kevin Abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the North Water (Arctic Ocean) |
topic_facet |
Arctic Ocean North Water Polynya Copepods Optical underwater imaging Automatic Species identification Lightframe On-sight Keyspecies Investigation) LOKI Fine-scale vertical distribution |
description |
In the Arctic Ocean copepods transfer energy produced by autotrophs to higher trophic levels. Net tows have long been used as the main zooplankton sampling tool but can hardly indicate the abundance and distribution of these animals on a fine-scale level. The LOKI (Lightframe On-sight Keyspecies Investigation) is an in-situ optical underwater imaging device capable of recording the vertical distribution of zooplankton at a scale of ~30-60 cm. Using this device, the fine-scale distribution of the key herbivorous copepods Calanus glacialis and C. hyperboreus as well as that of the omnivore Metridia longa was analyzed. It was investigated how the fine-scale vertical distribution of copepods was coupled to fluorescence of microalgae during the phytoplankton bloom and how that pattern differed between eastern and western North Water Polynya. Eastern and western NOW showed substantial differences in the fluorescence of microalgae which seemed to influence the fine-scale copepod distribution. Whereas copepod abundance and fluorescence seemed almost vertically separated on the Canadian side of the polynya, the abundance of the same taxa showed a strong vertical coupling with fluorescence on the Greenland side. The results suggest a strong influence of physical parameters in the NOW (e.g. temperature and upwelling), likely governed by the West Greenland Current and Baffin Island Current, on microalgae and hence fine-scale zooplankton distribution. |
format |
Doctoral or Postdoctoral Thesis |
author |
Gonthier, Kevin |
author_facet |
Gonthier, Kevin |
author_sort |
Gonthier, Kevin |
title |
Abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the North Water (Arctic Ocean) |
title_short |
Abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the North Water (Arctic Ocean) |
title_full |
Abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the North Water (Arctic Ocean) |
title_fullStr |
Abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the North Water (Arctic Ocean) |
title_full_unstemmed |
Abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the North Water (Arctic Ocean) |
title_sort |
abundance and vertical distributions of zooplankton along the east-west gradient of phytoplankton biomass in the north water (arctic ocean) |
publisher |
Zenodo |
publishDate |
2016 |
url |
https://doi.org/10.5281/zenodo.159297 |
genre |
Arctic Ocean Baffin Island Baffin Calanus glacialis Greenland Phytoplankton Zooplankton Copepods |
genre_facet |
Arctic Ocean Baffin Island Baffin Calanus glacialis Greenland Phytoplankton Zooplankton Copepods |
op_relation |
https://doi.org/ https://doi.org/10.5281/zenodo.159297 oai:zenodo.org:159297 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.159297 |
_version_ |
1810295331276980224 |