Meso- and macro-zooplankton community structure of the Amundsen Sea Polynya, Antarctica (Summer 2010–2011)
Abstract The Amundsen Sea Polynya (ASP) has, on average, the highest productivity per unit area in Antarctic waters. To investigate community structure and the role that zooplankton may play in utilizing this productivity, animals were collected at six stations inside and outside the ASP using paire...
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ftdoajarticles:oai:doaj.org/article:3e28e2dbbc88498d9f0b33eef0dfa798 2023-05-15T13:23:49+02:00 Meso- and macro-zooplankton community structure of the Amundsen Sea Polynya, Antarctica (Summer 2010–2011) Stephanie E. Wilson Rasmus Swalethorp Sanne Kjellerup Megan A. Wolverton Hugh W. Ducklow Patricia L. Yager 2015-01-01T00:00:00Z https://doi.org/10.12952/journal.elementa.000033 https://doaj.org/article/3e28e2dbbc88498d9f0b33eef0dfa798 EN eng BioOne http://elementascience.org/article/info:doi/10.12952/journal.elementa.000033 https://doaj.org/toc/2325-1026 2325-1026 doi:10.12952/journal.elementa.000033 https://doaj.org/article/3e28e2dbbc88498d9f0b33eef0dfa798 Elementa: Science of the Anthropocene (2015) zooplankton Antarctica Amundsen Sea Polynya Environmental sciences GE1-350 article 2015 ftdoajarticles https://doi.org/10.12952/journal.elementa.000033 2022-12-31T12:39:22Z Abstract The Amundsen Sea Polynya (ASP) has, on average, the highest productivity per unit area in Antarctic waters. To investigate community structure and the role that zooplankton may play in utilizing this productivity, animals were collected at six stations inside and outside the ASP using paired “day-night” tows with a 1 m2 MOCNESS. Stations were selected according to productivity based on satellite imagery, distance from the ice edge, and depth of the water column. Depths sampled were stratified from the surface to ∼ 50–100 m above the seafloor. Macrozooplankton were also collected at four stations located in different parts of the ASP using a 2 m2 Metro Net for krill surface trawls (0–120 m). The most abundant groups of zooplankton were copepods, ostracods, and euphausiids. Zooplankton biovolume (0.001 to 1.22 ml m-3) and abundance (0.21 to 97.5 individuals m-3) varied throughout all depth levels, with a midsurface maximum trend at ∼ 60–100 m. A segregation of increasing zooplankton trophic position with depth was observed in the MOCNESS tows. In general, zooplankton abundance was low above the mixed layer depth, a result attributed to a thick layer of the unpalatable colonial haptophyte, Phaeocystis antarctica. Abundances of the ice krill, Euphausia crystallarophias, however, were highest near the edge of the ice sheet within the ASP and larvae:adult ratios correlated with temperature above a depth of 60 m. Total zooplankton abundance correlated positively with chlorophyll a above 150 m, but negative correlations observed for biovolume vs. the proportion of P. antarctica in the phytoplankton estimated from pigment ratios (19’hexanoyloxyfucoxanthin:fucoxanthin) again pointed to avoidance of P. antarctica. Quantifying zooplankton community structure, abundance, and biovolume (biomass) in this highly productive polynya helps shed light on how carbon may be transferred to higher trophic levels and to depth in a region undergoing rapid warming. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Copepods Directory of Open Access Journals: DOAJ Articles Antarctic Amundsen Sea Elementa: Science of the Anthropocene 3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
zooplankton Antarctica Amundsen Sea Polynya Environmental sciences GE1-350 |
spellingShingle |
zooplankton Antarctica Amundsen Sea Polynya Environmental sciences GE1-350 Stephanie E. Wilson Rasmus Swalethorp Sanne Kjellerup Megan A. Wolverton Hugh W. Ducklow Patricia L. Yager Meso- and macro-zooplankton community structure of the Amundsen Sea Polynya, Antarctica (Summer 2010–2011) |
topic_facet |
zooplankton Antarctica Amundsen Sea Polynya Environmental sciences GE1-350 |
description |
Abstract The Amundsen Sea Polynya (ASP) has, on average, the highest productivity per unit area in Antarctic waters. To investigate community structure and the role that zooplankton may play in utilizing this productivity, animals were collected at six stations inside and outside the ASP using paired “day-night” tows with a 1 m2 MOCNESS. Stations were selected according to productivity based on satellite imagery, distance from the ice edge, and depth of the water column. Depths sampled were stratified from the surface to ∼ 50–100 m above the seafloor. Macrozooplankton were also collected at four stations located in different parts of the ASP using a 2 m2 Metro Net for krill surface trawls (0–120 m). The most abundant groups of zooplankton were copepods, ostracods, and euphausiids. Zooplankton biovolume (0.001 to 1.22 ml m-3) and abundance (0.21 to 97.5 individuals m-3) varied throughout all depth levels, with a midsurface maximum trend at ∼ 60–100 m. A segregation of increasing zooplankton trophic position with depth was observed in the MOCNESS tows. In general, zooplankton abundance was low above the mixed layer depth, a result attributed to a thick layer of the unpalatable colonial haptophyte, Phaeocystis antarctica. Abundances of the ice krill, Euphausia crystallarophias, however, were highest near the edge of the ice sheet within the ASP and larvae:adult ratios correlated with temperature above a depth of 60 m. Total zooplankton abundance correlated positively with chlorophyll a above 150 m, but negative correlations observed for biovolume vs. the proportion of P. antarctica in the phytoplankton estimated from pigment ratios (19’hexanoyloxyfucoxanthin:fucoxanthin) again pointed to avoidance of P. antarctica. Quantifying zooplankton community structure, abundance, and biovolume (biomass) in this highly productive polynya helps shed light on how carbon may be transferred to higher trophic levels and to depth in a region undergoing rapid warming. |
format |
Article in Journal/Newspaper |
author |
Stephanie E. Wilson Rasmus Swalethorp Sanne Kjellerup Megan A. Wolverton Hugh W. Ducklow Patricia L. Yager |
author_facet |
Stephanie E. Wilson Rasmus Swalethorp Sanne Kjellerup Megan A. Wolverton Hugh W. Ducklow Patricia L. Yager |
author_sort |
Stephanie E. Wilson |
title |
Meso- and macro-zooplankton community structure of the Amundsen Sea Polynya, Antarctica (Summer 2010–2011) |
title_short |
Meso- and macro-zooplankton community structure of the Amundsen Sea Polynya, Antarctica (Summer 2010–2011) |
title_full |
Meso- and macro-zooplankton community structure of the Amundsen Sea Polynya, Antarctica (Summer 2010–2011) |
title_fullStr |
Meso- and macro-zooplankton community structure of the Amundsen Sea Polynya, Antarctica (Summer 2010–2011) |
title_full_unstemmed |
Meso- and macro-zooplankton community structure of the Amundsen Sea Polynya, Antarctica (Summer 2010–2011) |
title_sort |
meso- and macro-zooplankton community structure of the amundsen sea polynya, antarctica (summer 2010–2011) |
publisher |
BioOne |
publishDate |
2015 |
url |
https://doi.org/10.12952/journal.elementa.000033 https://doaj.org/article/3e28e2dbbc88498d9f0b33eef0dfa798 |
geographic |
Antarctic Amundsen Sea |
geographic_facet |
Antarctic Amundsen Sea |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Copepods |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Copepods |
op_source |
Elementa: Science of the Anthropocene (2015) |
op_relation |
http://elementascience.org/article/info:doi/10.12952/journal.elementa.000033 https://doaj.org/toc/2325-1026 2325-1026 doi:10.12952/journal.elementa.000033 https://doaj.org/article/3e28e2dbbc88498d9f0b33eef0dfa798 |
op_doi |
https://doi.org/10.12952/journal.elementa.000033 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
3 |
_version_ |
1766375623768408064 |