Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea
Highlights: • Food fall scavenger experiments were conducted in the Fram Strait. • At 2500 m depth, carcasses of squid were consumed 7.6 times faster than those of jellyfish. • Amphipods dominated squid food falls but were virtually absent on jellyfish foodfalls • Invertebrate food falls in the Arct...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Elsevier
2022
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Online Access: | https://oceanrep.geomar.de/id/eprint/57113/ https://oceanrep.geomar.de/id/eprint/57113/1/Rohlfer_et_al_2022.pdf https://www.sciencedirect.com/science/article/pii/S0967063722001443?via%3Dihub https://doi.org/10.1016/j.dsr.2022.103832 |
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ftoceanrep:oai:oceanrep.geomar.de:57113 2024-02-11T09:59:36+01:00 Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea Rohlfer, Eva Scheer, Stella Luna Bergmann, M. Sweetman, A.K. Hoving, Henk-Jan T. 2022-11 text https://oceanrep.geomar.de/id/eprint/57113/ https://oceanrep.geomar.de/id/eprint/57113/1/Rohlfer_et_al_2022.pdf https://www.sciencedirect.com/science/article/pii/S0967063722001443?via%3Dihub https://doi.org/10.1016/j.dsr.2022.103832 en eng Elsevier https://oceanrep.geomar.de/id/eprint/57113/1/Rohlfer_et_al_2022.pdf Rohlfer, E., Scheer, S. L., Bergmann, M., Sweetman, A. K. and Hoving, H. J. T. (2022) Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea. Deep Sea Research Part I: Oceanographic Research Papers, 189 . Art.Nr.103832. DOI 10.1016/j.dsr.2022.103832 <https://doi.org/10.1016/j.dsr.2022.103832>. doi:10.1016/j.dsr.2022.103832 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.1016/j.dsr.2022.103832 2024-01-15T00:25:56Z Highlights: • Food fall scavenger experiments were conducted in the Fram Strait. • At 2500 m depth, carcasses of squid were consumed 7.6 times faster than those of jellyfish. • Amphipods dominated squid food falls but were virtually absent on jellyfish foodfalls • Invertebrate food falls in the Arctic attracted a total of 15 taxa. • Food fall scavenger community composition and consumption rates are depth-dependent. Abstract: Deep-sea benthic communities depend on food that reaches the seafloor from the overlying water column as well as from in-situ autotrophic production. Sinking carcasses (food falls) from jellyfish and squid contribute to this nutrient flux, but natural medium-sized food falls are rarely observed. Consequently, little is known about scavenging communities associated with invertebrate food falls. The Arctic Ocean is known for rapid environmental change and strong benthic-pelagic coupling. To investigate if scavenging responses in the Arctic deep sea differ between medium-sized food fall species we performed experiments in the Fram Strait at ∼2500 m depth. Baited free fall landers were equipped with a time-lapse camera (n = 5) and traps (n = 4) to document and capture scavengers. Squid (Loligo vulgaris) and jellyfish (Periphylla periphylla) were used as bait. Image analysis showed that the amphipod Eurythenes gryllus arrived within minutes and was the main scavenger on squid (MaxN = 166 individuals) while it was almost absent (MaxN = 3 individuals) on jellyfish. Nine additional scavenger taxa were identified in total, including Scopelocheirus and stegocephalid amphipods, various crustaceans and the gastropod Mohnia. The jellyfish bait was consumed 7.6 times slower than squid (jellyfish: 171 g d−1, squid: 1,294 g d−1), and almost three times slower than during similar experiments in the North Atlantic. Squid experiments incited higher consumption rates and scavenger diversity, but lower maximum abundances than similar experiments in the North Atlantic. Despite a small sample size of our ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean Eurythenes gryllus Fram Strait North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Deep Sea Research Part I: Oceanographic Research Papers 189 103832 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights: • Food fall scavenger experiments were conducted in the Fram Strait. • At 2500 m depth, carcasses of squid were consumed 7.6 times faster than those of jellyfish. • Amphipods dominated squid food falls but were virtually absent on jellyfish foodfalls • Invertebrate food falls in the Arctic attracted a total of 15 taxa. • Food fall scavenger community composition and consumption rates are depth-dependent. Abstract: Deep-sea benthic communities depend on food that reaches the seafloor from the overlying water column as well as from in-situ autotrophic production. Sinking carcasses (food falls) from jellyfish and squid contribute to this nutrient flux, but natural medium-sized food falls are rarely observed. Consequently, little is known about scavenging communities associated with invertebrate food falls. The Arctic Ocean is known for rapid environmental change and strong benthic-pelagic coupling. To investigate if scavenging responses in the Arctic deep sea differ between medium-sized food fall species we performed experiments in the Fram Strait at ∼2500 m depth. Baited free fall landers were equipped with a time-lapse camera (n = 5) and traps (n = 4) to document and capture scavengers. Squid (Loligo vulgaris) and jellyfish (Periphylla periphylla) were used as bait. Image analysis showed that the amphipod Eurythenes gryllus arrived within minutes and was the main scavenger on squid (MaxN = 166 individuals) while it was almost absent (MaxN = 3 individuals) on jellyfish. Nine additional scavenger taxa were identified in total, including Scopelocheirus and stegocephalid amphipods, various crustaceans and the gastropod Mohnia. The jellyfish bait was consumed 7.6 times slower than squid (jellyfish: 171 g d−1, squid: 1,294 g d−1), and almost three times slower than during similar experiments in the North Atlantic. Squid experiments incited higher consumption rates and scavenger diversity, but lower maximum abundances than similar experiments in the North Atlantic. Despite a small sample size of our ... |
format |
Article in Journal/Newspaper |
author |
Rohlfer, Eva Scheer, Stella Luna Bergmann, M. Sweetman, A.K. Hoving, Henk-Jan T. |
spellingShingle |
Rohlfer, Eva Scheer, Stella Luna Bergmann, M. Sweetman, A.K. Hoving, Henk-Jan T. Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea |
author_facet |
Rohlfer, Eva Scheer, Stella Luna Bergmann, M. Sweetman, A.K. Hoving, Henk-Jan T. |
author_sort |
Rohlfer, Eva |
title |
Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea |
title_short |
Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea |
title_full |
Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea |
title_fullStr |
Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea |
title_full_unstemmed |
Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea |
title_sort |
contrasting residence time and scavenging communities of experimental invertebrate food falls in the arctic deep sea |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/57113/ https://oceanrep.geomar.de/id/eprint/57113/1/Rohlfer_et_al_2022.pdf https://www.sciencedirect.com/science/article/pii/S0967063722001443?via%3Dihub https://doi.org/10.1016/j.dsr.2022.103832 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Eurythenes gryllus Fram Strait North Atlantic |
genre_facet |
Arctic Arctic Arctic Ocean Eurythenes gryllus Fram Strait North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/57113/1/Rohlfer_et_al_2022.pdf Rohlfer, E., Scheer, S. L., Bergmann, M., Sweetman, A. K. and Hoving, H. J. T. (2022) Contrasting residence time and scavenging communities of experimental invertebrate food falls in the Arctic deep sea. Deep Sea Research Part I: Oceanographic Research Papers, 189 . Art.Nr.103832. DOI 10.1016/j.dsr.2022.103832 <https://doi.org/10.1016/j.dsr.2022.103832>. doi:10.1016/j.dsr.2022.103832 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr.2022.103832 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
189 |
container_start_page |
103832 |
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1790595422287298560 |