Trophodynamics of Salps in the Atlantic Southern Ocean
The impact of food regimes on the feeding dynamics, bioelemental composition and community structure of the two Southern Ocean salps Salpa thompsoni and Ihlea racovitzai are studied. During a mesoscale iron fertilisation experiment (EIFEX) in the Southern Ocean Polar Frontal zone, S. thompsoni showe...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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Universität Bremen
2010
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/2818 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000119205 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/2818 2023-05-15T13:42:31+02:00 Trophodynamics of Salps in the Atlantic Southern Ocean Trophodynamik von Salpen im atlantischen Sektor des Südozeans Harbou, Lena von Bathmann, Ulrich Hagen, Wilhelm 2010-02-01 application/pdf https://media.suub.uni-bremen.de/handle/elib/2818 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000119205 eng eng Universität Bremen FB2 Biologie/Chemie https://media.suub.uni-bremen.de/handle/elib/2818 urn:nbn:de:gbv:46-diss000119205 info:eu-repo/semantics/openAccess salps Salpa thompsoni Ihlea racovitzai Antarctica zooplankton grazer gut fluorescence gut pigment fatty acid biomarker 570 570 Life sciences biology ddc:570 Dissertation doctoralThesis 2010 ftsubbremen 2022-11-09T07:09:53Z The impact of food regimes on the feeding dynamics, bioelemental composition and community structure of the two Southern Ocean salps Salpa thompsoni and Ihlea racovitzai are studied. During a mesoscale iron fertilisation experiment (EIFEX) in the Southern Ocean Polar Frontal zone, S. thompsoni showed an enhanced ingestion inside the fast developing bloom but a low degradation efficiency of the diatom rich food. Seasonal feeding dynamics of S. thompsoni and I. racovitzai were investigated during three surveys in the Lazarev Sea in summer, fall, and winter (LAKRIS and IPY 2007/2008). Pigment concentrations in the salp guts of both species showed significant positive correlation to ambient surface chlorophyll concentrations with high feeding activity of Ihlea racovitzai in winter. Ecological impacts of the salps grazing pressure and contribution to the vertical flux by the production of fecal pellets are discussed for both studies. Population structure and demographic development strongly suggest that blooms of both salp species are pulsed events of ephemeral duration in Antarctic waters. Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica IPY Lazarev Sea Southern Ocean Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic Lazarev ENVELOPE(12.917,12.917,-69.967,-69.967) Lazarev Sea ENVELOPE(7.000,7.000,-68.000,-68.000) Southern Ocean |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
salps Salpa thompsoni Ihlea racovitzai Antarctica zooplankton grazer gut fluorescence gut pigment fatty acid biomarker 570 570 Life sciences biology ddc:570 |
spellingShingle |
salps Salpa thompsoni Ihlea racovitzai Antarctica zooplankton grazer gut fluorescence gut pigment fatty acid biomarker 570 570 Life sciences biology ddc:570 Harbou, Lena von Trophodynamics of Salps in the Atlantic Southern Ocean |
topic_facet |
salps Salpa thompsoni Ihlea racovitzai Antarctica zooplankton grazer gut fluorescence gut pigment fatty acid biomarker 570 570 Life sciences biology ddc:570 |
description |
The impact of food regimes on the feeding dynamics, bioelemental composition and community structure of the two Southern Ocean salps Salpa thompsoni and Ihlea racovitzai are studied. During a mesoscale iron fertilisation experiment (EIFEX) in the Southern Ocean Polar Frontal zone, S. thompsoni showed an enhanced ingestion inside the fast developing bloom but a low degradation efficiency of the diatom rich food. Seasonal feeding dynamics of S. thompsoni and I. racovitzai were investigated during three surveys in the Lazarev Sea in summer, fall, and winter (LAKRIS and IPY 2007/2008). Pigment concentrations in the salp guts of both species showed significant positive correlation to ambient surface chlorophyll concentrations with high feeding activity of Ihlea racovitzai in winter. Ecological impacts of the salps grazing pressure and contribution to the vertical flux by the production of fecal pellets are discussed for both studies. Population structure and demographic development strongly suggest that blooms of both salp species are pulsed events of ephemeral duration in Antarctic waters. |
author2 |
Bathmann, Ulrich Hagen, Wilhelm |
format |
Doctoral or Postdoctoral Thesis |
author |
Harbou, Lena von |
author_facet |
Harbou, Lena von |
author_sort |
Harbou, Lena von |
title |
Trophodynamics of Salps in the Atlantic Southern Ocean |
title_short |
Trophodynamics of Salps in the Atlantic Southern Ocean |
title_full |
Trophodynamics of Salps in the Atlantic Southern Ocean |
title_fullStr |
Trophodynamics of Salps in the Atlantic Southern Ocean |
title_full_unstemmed |
Trophodynamics of Salps in the Atlantic Southern Ocean |
title_sort |
trophodynamics of salps in the atlantic southern ocean |
publisher |
Universität Bremen |
publishDate |
2010 |
url |
https://media.suub.uni-bremen.de/handle/elib/2818 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000119205 |
long_lat |
ENVELOPE(12.917,12.917,-69.967,-69.967) ENVELOPE(7.000,7.000,-68.000,-68.000) |
geographic |
Antarctic Lazarev Lazarev Sea Southern Ocean |
geographic_facet |
Antarctic Lazarev Lazarev Sea Southern Ocean |
genre |
Antarc* Antarctic Antarctica IPY Lazarev Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica IPY Lazarev Sea Southern Ocean |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/2818 urn:nbn:de:gbv:46-diss000119205 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766168760203345920 |