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 HAUSGARTEN...
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ftdoajarticles:oai:doaj.org/article:397051207a034c20bca3492b6256137f 2023-05-15T15:13:05+02:00 Pelagic Amphipods in the Eastern Fram Strait With Continuing Presence of Themisto compressa Based on Sediment Trap Time Series Franz Schröter Charlotte Havermans Angelina Kraft Nadine Knüppel Agnieszka Beszczynska-Möller Eduard Bauerfeind Eva-Maria Nöthig 2019-06-01T00:00:00Z https://doi.org/10.3389/fmars.2019.00311 https://doaj.org/article/397051207a034c20bca3492b6256137f EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2019.00311/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00311 https://doaj.org/article/397051207a034c20bca3492b6256137f Frontiers in Marine Science, Vol 6 (2019) sediment traps hyperiids – pelagic amphipods Arctic marine ecology biodiversity range shifts Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2019 ftdoajarticles https://doi.org/10.3389/fmars.2019.00311 2022-12-31T02:21:17Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Frontiers in Marine Science 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sediment traps hyperiids – pelagic amphipods Arctic marine ecology biodiversity range shifts Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
sediment traps hyperiids – pelagic amphipods Arctic marine ecology biodiversity range shifts Science Q General. Including nature conservation geographical distribution QH1-199.5 Franz Schröter Charlotte Havermans Angelina Kraft Nadine Knüppel Agnieszka Beszczynska-Möller Eduard Bauerfeind Eva-Maria Nöthig Pelagic Amphipods in the Eastern Fram Strait With Continuing Presence of Themisto compressa Based on Sediment Trap Time Series |
topic_facet |
sediment traps hyperiids – pelagic amphipods Arctic marine ecology biodiversity range shifts Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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 |
Franz Schröter Charlotte Havermans Angelina Kraft Nadine Knüppel Agnieszka Beszczynska-Möller Eduard Bauerfeind Eva-Maria Nöthig |
author_facet |
Franz Schröter Charlotte Havermans Angelina Kraft Nadine Knüppel Agnieszka Beszczynska-Möller Eduard Bauerfeind Eva-Maria Nöthig |
author_sort |
Franz Schröter |
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://doi.org/10.3389/fmars.2019.00311 https://doaj.org/article/397051207a034c20bca3492b6256137f |
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, Vol 6 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2019.00311/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00311 https://doaj.org/article/397051207a034c20bca3492b6256137f |
op_doi |
https://doi.org/10.3389/fmars.2019.00311 |
container_title |
Frontiers in Marine Science |
container_volume |
6 |
_version_ |
1766343680469237760 |