Arctic pelagic amphipods - community patterns and life-cycle history in a warming Arctic Ocean
Indications accumulate that the Arctic Ocean is in transition towards a new, warmer state. With this development, we expect shifts in the composition of Arctic zooplankton communities, as well as adaptations in the life-cycle history of established species. In the Arctic marine food web, carnivorous...
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Universität Bremen
2013
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/450 2023-05-15T13:15:53+02:00 Arctic pelagic amphipods - community patterns and life-cycle history in a warming Arctic Ocean Arktische, pelagische Amphipoden - Die Zusammensetzung ihrer Artengemeinschaft und ihre Lebenszyklen im Hinblick auf die Erwärmung des Arktischen Ozeans Kraft, Angelina Auel, Holger Bathmann, Ulrich V. 2013-02-18 application/pdf https://media.suub.uni-bremen.de/handle/elib/450 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103015-14 eng eng Universität Bremen FB2 Biologie/Chemie https://media.suub.uni-bremen.de/handle/elib/450 urn:nbn:de:gbv:46-00103015-14 info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) CC-BY Hyperiid amphipod Themisto Cyclocaris Life-cycle Sediment traps Population dynamics Fram Strait 570 570 Life sciences biology ddc:570 Dissertation doctoralThesis 2013 ftsubbremen 2022-11-09T07:09:22Z Indications accumulate that the Arctic Ocean is in transition towards a new, warmer state. With this development, we expect shifts in the composition of Arctic zooplankton communities, as well as adaptations in the life-cycle history of established species. In the Arctic marine food web, carnivorous pelagic amphipods are an important link between herbivorous mesozooplankton and higher trophic levels such as planktivorous fish and seabirds. The present study closely investigates the community patterns of three important epipelagic amphipods Themisto abyssorum, T. libellula and T. compressa, and the deep-water amphipod Cyclocaris guilelmi. The objectives of this work focus on the year-round life-cycle characteristics of pelagic amphipods and on their function in the food web structure at study sites between Greenland and the Svalbard archipelago. In this thesis, three publications address the year-round life-cycle characteristics of Themisto spp. and C. guilelmi sampled by moored sediment traps in the northeastern Fram Strait. The sediment traps are deployed in a long-term observatory, the HAUSGARTEN, which is maintained by the Alfred Wegener Institute for Polar and Marine Research at the boundary between the central Arctic Ocean and the Greenland Sea since 2000. In the epipelagic trap samples hyperiids of the genus Themisto represent the dominant taxa among the collected amphipod community. Length-frequency analyses of year-round samples from 2000 to 2009 indicate a life span of two years for the sub-arctic species T. abyssorum and at least three years for the typical Arctic amphipod T. libellula. From 2004 to 2008, the meso- and bathypelagic amphipod communities in the sediment traps from 800 to 2700 m depth show the prevalent appearance of the deep-water amphipod C. guilelmi. Two other studies focus on the winter feeding strategies of Themisto spp. and C. guilelmi. The results from the gut content analyses indicate for the first time that T. abyssorum and T. libellula are active predators during the Arctic ... Doctoral or Postdoctoral Thesis Alfred Wegener Institute Arctic amphipod Arctic Arctic Ocean Arktis* Cyclocaris Cyclocaris guilelmi Fram Strait Greenland Greenland Sea Mesozooplankton Svalbard Themisto abyssorum Themisto Zooplankton Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Arctic Arctic Ocean Greenland Svalbard Svalbard Archipelago |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Hyperiid amphipod Themisto Cyclocaris Life-cycle Sediment traps Population dynamics Fram Strait 570 570 Life sciences biology ddc:570 |
spellingShingle |
Hyperiid amphipod Themisto Cyclocaris Life-cycle Sediment traps Population dynamics Fram Strait 570 570 Life sciences biology ddc:570 Kraft, Angelina Arctic pelagic amphipods - community patterns and life-cycle history in a warming Arctic Ocean |
topic_facet |
Hyperiid amphipod Themisto Cyclocaris Life-cycle Sediment traps Population dynamics Fram Strait 570 570 Life sciences biology ddc:570 |
description |
Indications accumulate that the Arctic Ocean is in transition towards a new, warmer state. With this development, we expect shifts in the composition of Arctic zooplankton communities, as well as adaptations in the life-cycle history of established species. In the Arctic marine food web, carnivorous pelagic amphipods are an important link between herbivorous mesozooplankton and higher trophic levels such as planktivorous fish and seabirds. The present study closely investigates the community patterns of three important epipelagic amphipods Themisto abyssorum, T. libellula and T. compressa, and the deep-water amphipod Cyclocaris guilelmi. The objectives of this work focus on the year-round life-cycle characteristics of pelagic amphipods and on their function in the food web structure at study sites between Greenland and the Svalbard archipelago. In this thesis, three publications address the year-round life-cycle characteristics of Themisto spp. and C. guilelmi sampled by moored sediment traps in the northeastern Fram Strait. The sediment traps are deployed in a long-term observatory, the HAUSGARTEN, which is maintained by the Alfred Wegener Institute for Polar and Marine Research at the boundary between the central Arctic Ocean and the Greenland Sea since 2000. In the epipelagic trap samples hyperiids of the genus Themisto represent the dominant taxa among the collected amphipod community. Length-frequency analyses of year-round samples from 2000 to 2009 indicate a life span of two years for the sub-arctic species T. abyssorum and at least three years for the typical Arctic amphipod T. libellula. From 2004 to 2008, the meso- and bathypelagic amphipod communities in the sediment traps from 800 to 2700 m depth show the prevalent appearance of the deep-water amphipod C. guilelmi. Two other studies focus on the winter feeding strategies of Themisto spp. and C. guilelmi. The results from the gut content analyses indicate for the first time that T. abyssorum and T. libellula are active predators during the Arctic ... |
author2 |
Auel, Holger Bathmann, Ulrich V. |
format |
Doctoral or Postdoctoral Thesis |
author |
Kraft, Angelina |
author_facet |
Kraft, Angelina |
author_sort |
Kraft, Angelina |
title |
Arctic pelagic amphipods - community patterns and life-cycle history in a warming Arctic Ocean |
title_short |
Arctic pelagic amphipods - community patterns and life-cycle history in a warming Arctic Ocean |
title_full |
Arctic pelagic amphipods - community patterns and life-cycle history in a warming Arctic Ocean |
title_fullStr |
Arctic pelagic amphipods - community patterns and life-cycle history in a warming Arctic Ocean |
title_full_unstemmed |
Arctic pelagic amphipods - community patterns and life-cycle history in a warming Arctic Ocean |
title_sort |
arctic pelagic amphipods - community patterns and life-cycle history in a warming arctic ocean |
publisher |
Universität Bremen |
publishDate |
2013 |
url |
https://media.suub.uni-bremen.de/handle/elib/450 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103015-14 |
geographic |
Arctic Arctic Ocean Greenland Svalbard Svalbard Archipelago |
geographic_facet |
Arctic Arctic Ocean Greenland Svalbard Svalbard Archipelago |
genre |
Alfred Wegener Institute Arctic amphipod Arctic Arctic Ocean Arktis* Cyclocaris Cyclocaris guilelmi Fram Strait Greenland Greenland Sea Mesozooplankton Svalbard Themisto abyssorum Themisto Zooplankton |
genre_facet |
Alfred Wegener Institute Arctic amphipod Arctic Arctic Ocean Arktis* Cyclocaris Cyclocaris guilelmi Fram Strait Greenland Greenland Sea Mesozooplankton Svalbard Themisto abyssorum Themisto Zooplankton |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/450 urn:nbn:de:gbv:46-00103015-14 |
op_rights |
info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) |
op_rightsnorm |
CC-BY |
_version_ |
1766271643760459776 |