Different feeding strategies in Antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers
Background: Scavenger guilds are composed of a variety of species, co-existing in the same habitat and sharing the same niche in the food web. Niche partitioning among them can manifest in different feeding strategies, e.g. during carcass feeding. In the bentho-pelagic realm of the Southern Ocean, s...
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ftzenodo:oai:zenodo.org:1134374 2024-09-15T17:43:19+00:00 Different feeding strategies in Antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers Seefeldt, Meike Anna Campana, Gabriela Laura Deregibus, Dolores Quartino, María Liliana Abele, Doris Tollrian, Ralph Held, Christoph 2017-12-27 https://doi.org/10.1186/s12983-017-0248-3 unknown Zenodo https://zenodo.org/communities/fp7-bmc https://zenodo.org/communities/eu https://doi.org/10.1186/s12983-017-0248-3 oai:zenodo.org:1134374 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Frontiers in Zoology, 14(1), 59, (2017-12-27) Southern Ocean King George Island/ Isla 25 de Mayo Potter Cove Succession Carrion-feeding Food web Notothenia rossii Notothenia coriiceps Palmaria decipiens Desmarestia menziesii info:eu-repo/semantics/article 2017 ftzenodo https://doi.org/10.1186/s12983-017-0248-3 2024-07-27T01:42:20Z Background: Scavenger guilds are composed of a variety of species, co-existing in the same habitat and sharing the same niche in the food web. Niche partitioning among them can manifest in different feeding strategies, e.g. during carcass feeding. In the bentho-pelagic realm of the Southern Ocean, scavenging amphipods (Lysianassoidea) are ubiquitous and occupy a central role in decomposition processes. Here we address the question whether scavenging lysianassoid amphipods employ different feeding strategies during carcass feeding, and whether synergistic feeding activities may influence carcass decomposition. To this end, we compared the relatively large species Waldeckia obesa with the small species Cheirimedon femoratus, Hippomedon kergueleni, and Orchomenella rotundifrons during fish carcass feeding ( Notothenia spp.). The experimental approach combined ex situ feeding experiments, behavioural observations, and scanning electron microscopic analyses of mandibles. Furthermore, we aimed to detect ecological drivers for distribution patterns of scavenging amphipods in the Antarctic coastal ecosystems of Potter Cove. In Potter Cove, the climate-driven rapid retreat of the Fourcade Glacier is causing various environmental changes including the provision of new marine habitats to colonise. While in the newly ice-free areas fish are rare, macroalgae have already colonised hard substrates. Assuming that a temporal dietary switch may increase the colonisation success of the most abundant lysianassoids C. femoratus and H. kergueleni , we aimed to determine their consumption rates (g food x g amphipods −1 x day −1 ) and preferences of macroalgae and fish. Results: We detected two functional groups with different feeding strategies among scavenging amphipods during carcass feeding: carcass 'opener' and 'squeezer'. Synergistic effects between these groups were not statistically verified under the conditions tested. C. femoratus switched its diet when fish was not available by consuming macroalgae (about 0.2 day −1 ) but ... Article in Journal/Newspaper Antarc* Antarctic Isla 25 de Mayo King George Island Notothenia rossii Southern Ocean Zenodo Frontiers in Zoology 14 1 |
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unknown |
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Southern Ocean King George Island/ Isla 25 de Mayo Potter Cove Succession Carrion-feeding Food web Notothenia rossii Notothenia coriiceps Palmaria decipiens Desmarestia menziesii |
spellingShingle |
Southern Ocean King George Island/ Isla 25 de Mayo Potter Cove Succession Carrion-feeding Food web Notothenia rossii Notothenia coriiceps Palmaria decipiens Desmarestia menziesii Seefeldt, Meike Anna Campana, Gabriela Laura Deregibus, Dolores Quartino, María Liliana Abele, Doris Tollrian, Ralph Held, Christoph Different feeding strategies in Antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers |
topic_facet |
Southern Ocean King George Island/ Isla 25 de Mayo Potter Cove Succession Carrion-feeding Food web Notothenia rossii Notothenia coriiceps Palmaria decipiens Desmarestia menziesii |
description |
Background: Scavenger guilds are composed of a variety of species, co-existing in the same habitat and sharing the same niche in the food web. Niche partitioning among them can manifest in different feeding strategies, e.g. during carcass feeding. In the bentho-pelagic realm of the Southern Ocean, scavenging amphipods (Lysianassoidea) are ubiquitous and occupy a central role in decomposition processes. Here we address the question whether scavenging lysianassoid amphipods employ different feeding strategies during carcass feeding, and whether synergistic feeding activities may influence carcass decomposition. To this end, we compared the relatively large species Waldeckia obesa with the small species Cheirimedon femoratus, Hippomedon kergueleni, and Orchomenella rotundifrons during fish carcass feeding ( Notothenia spp.). The experimental approach combined ex situ feeding experiments, behavioural observations, and scanning electron microscopic analyses of mandibles. Furthermore, we aimed to detect ecological drivers for distribution patterns of scavenging amphipods in the Antarctic coastal ecosystems of Potter Cove. In Potter Cove, the climate-driven rapid retreat of the Fourcade Glacier is causing various environmental changes including the provision of new marine habitats to colonise. While in the newly ice-free areas fish are rare, macroalgae have already colonised hard substrates. Assuming that a temporal dietary switch may increase the colonisation success of the most abundant lysianassoids C. femoratus and H. kergueleni , we aimed to determine their consumption rates (g food x g amphipods −1 x day −1 ) and preferences of macroalgae and fish. Results: We detected two functional groups with different feeding strategies among scavenging amphipods during carcass feeding: carcass 'opener' and 'squeezer'. Synergistic effects between these groups were not statistically verified under the conditions tested. C. femoratus switched its diet when fish was not available by consuming macroalgae (about 0.2 day −1 ) but ... |
format |
Article in Journal/Newspaper |
author |
Seefeldt, Meike Anna Campana, Gabriela Laura Deregibus, Dolores Quartino, María Liliana Abele, Doris Tollrian, Ralph Held, Christoph |
author_facet |
Seefeldt, Meike Anna Campana, Gabriela Laura Deregibus, Dolores Quartino, María Liliana Abele, Doris Tollrian, Ralph Held, Christoph |
author_sort |
Seefeldt, Meike Anna |
title |
Different feeding strategies in Antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers |
title_short |
Different feeding strategies in Antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers |
title_full |
Different feeding strategies in Antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers |
title_fullStr |
Different feeding strategies in Antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers |
title_full_unstemmed |
Different feeding strategies in Antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers |
title_sort |
different feeding strategies in antarctic scavenging amphipods and their implications for colonisation success in times of retreating glaciers |
publisher |
Zenodo |
publishDate |
2017 |
url |
https://doi.org/10.1186/s12983-017-0248-3 |
genre |
Antarc* Antarctic Isla 25 de Mayo King George Island Notothenia rossii Southern Ocean |
genre_facet |
Antarc* Antarctic Isla 25 de Mayo King George Island Notothenia rossii Southern Ocean |
op_source |
Frontiers in Zoology, 14(1), 59, (2017-12-27) |
op_relation |
https://zenodo.org/communities/fp7-bmc https://zenodo.org/communities/eu https://doi.org/10.1186/s12983-017-0248-3 oai:zenodo.org:1134374 |
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/10.1186/s12983-017-0248-3 |
container_title |
Frontiers in Zoology |
container_volume |
14 |
container_issue |
1 |
_version_ |
1810490258992660480 |