Pelagic amphipods in the eastern fram strait with continuing presence of Themisto compressa based on sediment trap time series
Pelagic amphipods represent a large fraction of organisms entering sediment traps as so-called "swimmers." These swimmers were sampled with sediment traps (~200-300 m water depth) with two mooring arrays deployed at two different positions in the Long-Term Ecological Research observatory H...
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Online Access: | https://oa.tib.eu/renate/handle/123456789/5076 https://doi.org/10.34657/3705 |
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fttibhannoverren:oai:oa.tib.eu:123456789/5076 2023-07-30T04:02:01+02:00 Pelagic amphipods in the eastern fram strait with continuing presence of Themisto compressa based on sediment trap time series Schröter, F. Havermans, C. Kraft, A. Knüppel, N. Beszczynska-Möller, A. Bauerfeind, E. Nöthig, E.-M. 2019 application/pdf https://oa.tib.eu/renate/handle/123456789/5076 https://doi.org/10.34657/3705 eng eng Frontiers Media S.A. ISSN:2296-7745 DOI:https://doi.org/10.3389/fmars.2019.00311 https://doi.org/10.34657/3705 https://oa.tib.eu/renate/handle/123456789/5076 CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ frei zugänglich Frontiers in Marine Science 6 (2019) Arctic marine ecology Biodiversity Hyperiids - pelagic amphipods Range shifts Sediment traps ddc:570 status-type:publishedVersion doc-type:article doc-type:Text 2019 fttibhannoverren https://doi.org/10.34657/370510.3389/fmars.2019.00311 2023-07-10T16:19:36Z Pelagic amphipods represent a large fraction of organisms entering sediment traps as so-called "swimmers." These swimmers were sampled with sediment traps (~200-300 m water depth) with two mooring arrays deployed at two different positions in the Long-Term Ecological Research observatory HAUSGARTEN in the northeastern Fram Strait. This sampling allowed us to investigate amphipod year-round abundances and inter-annual trends from 2000 onward. In this study, newly analyzed data from a 3-years period (August 2011-June 2014) are presented, extending this long-term investigation. In our results, the species Themisto abyssorum, T. libellula, and T. compressa dominated the swimmer biomass, corroborating previous studies. The observed increase of amphipod abundances persisted in all three species, additionally implying that Themisto compressa maintained its population off Svalbard, which appeared for the first time here after a warm anomaly in 2004-2007. This study provides evidence for changes in amphipod community patterns that can mainly be attributed to growing abundances of T. compressa. Similarly, another hyperiid, Lanceola clausii, also increased in abundance over the investigated period. For T. libellula, almost no juvenile individuals were recorded in the sampling period 2013/14, even though juveniles of this species were common in earlier records. The three more years of observations clearly suggest that recently documented environmental shifts persist in the eastern Fram Strait. They also highlight the merit of using sediment trap time series to obtain year-round data sets needed to reveal processes and range shift dynamics in the pelagic system on a long-term basis. Article in Journal/Newspaper Arctic Fram Strait Svalbard Themisto abyssorum Themisto Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover) Arctic Svalbard |
institution |
Open Polar |
collection |
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover) |
op_collection_id |
fttibhannoverren |
language |
English |
topic |
Arctic marine ecology Biodiversity Hyperiids - pelagic amphipods Range shifts Sediment traps ddc:570 |
spellingShingle |
Arctic marine ecology Biodiversity Hyperiids - pelagic amphipods Range shifts Sediment traps ddc:570 Schröter, F. Havermans, C. Kraft, A. Knüppel, N. Beszczynska-Möller, A. Bauerfeind, E. Nöthig, E.-M. Pelagic amphipods in the eastern fram strait with continuing presence of Themisto compressa based on sediment trap time series |
topic_facet |
Arctic marine ecology Biodiversity Hyperiids - pelagic amphipods Range shifts Sediment traps ddc:570 |
description |
Pelagic amphipods represent a large fraction of organisms entering sediment traps as so-called "swimmers." These swimmers were sampled with sediment traps (~200-300 m water depth) with two mooring arrays deployed at two different positions in the Long-Term Ecological Research observatory HAUSGARTEN in the northeastern Fram Strait. This sampling allowed us to investigate amphipod year-round abundances and inter-annual trends from 2000 onward. In this study, newly analyzed data from a 3-years period (August 2011-June 2014) are presented, extending this long-term investigation. In our results, the species Themisto abyssorum, T. libellula, and T. compressa dominated the swimmer biomass, corroborating previous studies. The observed increase of amphipod abundances persisted in all three species, additionally implying that Themisto compressa maintained its population off Svalbard, which appeared for the first time here after a warm anomaly in 2004-2007. This study provides evidence for changes in amphipod community patterns that can mainly be attributed to growing abundances of T. compressa. Similarly, another hyperiid, Lanceola clausii, also increased in abundance over the investigated period. For T. libellula, almost no juvenile individuals were recorded in the sampling period 2013/14, even though juveniles of this species were common in earlier records. The three more years of observations clearly suggest that recently documented environmental shifts persist in the eastern Fram Strait. They also highlight the merit of using sediment trap time series to obtain year-round data sets needed to reveal processes and range shift dynamics in the pelagic system on a long-term basis. |
format |
Article in Journal/Newspaper |
author |
Schröter, F. Havermans, C. Kraft, A. Knüppel, N. Beszczynska-Möller, A. Bauerfeind, E. Nöthig, E.-M. |
author_facet |
Schröter, F. Havermans, C. Kraft, A. Knüppel, N. Beszczynska-Möller, A. Bauerfeind, E. Nöthig, E.-M. |
author_sort |
Schröter, F. |
title |
Pelagic amphipods in the eastern fram strait with continuing presence of Themisto compressa based on sediment trap time series |
title_short |
Pelagic amphipods in the eastern fram strait with continuing presence of Themisto compressa based on sediment trap time series |
title_full |
Pelagic amphipods in the eastern fram strait with continuing presence of Themisto compressa based on sediment trap time series |
title_fullStr |
Pelagic amphipods in the eastern fram strait with continuing presence of Themisto compressa based on sediment trap time series |
title_full_unstemmed |
Pelagic amphipods in the eastern fram strait with continuing presence of Themisto compressa based on sediment trap time series |
title_sort |
pelagic amphipods in the eastern fram strait with continuing presence of themisto compressa based on sediment trap time series |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://oa.tib.eu/renate/handle/123456789/5076 https://doi.org/10.34657/3705 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Fram Strait Svalbard Themisto abyssorum Themisto |
genre_facet |
Arctic Fram Strait Svalbard Themisto abyssorum Themisto |
op_source |
Frontiers in Marine Science 6 (2019) |
op_relation |
ISSN:2296-7745 DOI:https://doi.org/10.3389/fmars.2019.00311 https://doi.org/10.34657/3705 https://oa.tib.eu/renate/handle/123456789/5076 |
op_rights |
CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ frei zugänglich |
op_doi |
https://doi.org/10.34657/370510.3389/fmars.2019.00311 |
_version_ |
1772812743175307264 |