Race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species
Introduction Hyperiid amphipods of the genus Themisto are a key polar zooplankton group in terms of biomass and play an important role as prey for higher trophic levels. They are prone to undergo changes in abundance and distribution in the course of the ongoing environmental changes. In the Souther...
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Frontiers Media SA
2024
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Online Access: | https://archimer.ifremer.fr/doc/00883/99516/109613.pdf https://archimer.ifremer.fr/doc/00883/99516/109614.pdf https://doi.org/10.3389/fmars.2024.1336024 https://archimer.ifremer.fr/doc/00883/99516/ |
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ftarchimer:oai:archimer.ifremer.fr:99516 2024-05-12T07:53:43+00:00 Race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species Martinez-alarcón, Diana Held, Christoph Harms, Lars Auel, Holger Hagen, Wilhelm Havermans, Charlotte 2024-03 application/pdf https://archimer.ifremer.fr/doc/00883/99516/109613.pdf https://archimer.ifremer.fr/doc/00883/99516/109614.pdf https://doi.org/10.3389/fmars.2024.1336024 https://archimer.ifremer.fr/doc/00883/99516/ eng eng Frontiers Media SA https://archimer.ifremer.fr/doc/00883/99516/109613.pdf https://archimer.ifremer.fr/doc/00883/99516/109614.pdf doi:10.3389/fmars.2024.1336024 https://archimer.ifremer.fr/doc/00883/99516/ info:eu-repo/semantics/openAccess restricted use Frontiers In Marine Science (2296-7745) (Frontiers Media SA), 2024-03 , Vol. 11 , P. 1336024 (13p.) Themisto gaudichaudii Themisto abyssorum range shifts Atlantification Arctic Antarctic text Article info:eu-repo/semantics/article 2024 ftarchimer https://doi.org/10.3389/fmars.2024.1336024 2024-04-17T14:00:53Z Introduction Hyperiid amphipods of the genus Themisto are a key polar zooplankton group in terms of biomass and play an important role as prey for higher trophic levels. They are prone to undergo changes in abundance and distribution in the course of the ongoing environmental changes. In the Southern Ocean, Themisto gaudichaudii is predicted to expand its distribution poleward. In the Arctic, the boreal-Atlantic T. abyssorum increases in abundance, resulting in an increased competition with a genuine polar congener. It is not known, however, whether T. gaudichaudii and T. abyssorum have the potential to efficiently adapt to changing water temperatures at their current distribution range or whether they will be shifting their ranges poleward. Methods We exposed the two Themisto species from different geographic populations to temperature-change experiments, a cold treatment and a heat-shock treatment. After that, we carried out transcriptome sequencing to compare gene expression patterns in the different treatments and species. Results We show that under similar heat conditions, T. gaudichaudii differentially expressed more genes (26-fold change) than T. abyssorum. Furthermore, we observed qualitative differences between genetic clusters in T. gaudichaudii. Discussion The differences observed between genetic clusters in T. gaudichaudii suggest that evolutionary divergence can be linked to changes in the regulatory pathways involved in temperature stress. These could influence the capacity of each genetic cluster to cope differently with temperature changes. In contrast to its congeneric species, T. abyssorum showed a pronounced adaptive flexibility to thermal stress; it appears to have the ability to continue its poleward expansion but may also cope with increasing temperatures in its current environments. Our findings contribute to understand the response of two range-shifting Themisto species to thermal stress in view of the environmental gradients they encounter throughout their current or future distribution ... Article in Journal/Newspaper Antarc* Antarctic Arctic Southern Ocean Themisto abyssorum Themisto Zooplankton Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Antarctic Southern Ocean Frontiers in Marine Science 11 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Themisto gaudichaudii Themisto abyssorum range shifts Atlantification Arctic Antarctic |
spellingShingle |
Themisto gaudichaudii Themisto abyssorum range shifts Atlantification Arctic Antarctic Martinez-alarcón, Diana Held, Christoph Harms, Lars Auel, Holger Hagen, Wilhelm Havermans, Charlotte Race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species |
topic_facet |
Themisto gaudichaudii Themisto abyssorum range shifts Atlantification Arctic Antarctic |
description |
Introduction Hyperiid amphipods of the genus Themisto are a key polar zooplankton group in terms of biomass and play an important role as prey for higher trophic levels. They are prone to undergo changes in abundance and distribution in the course of the ongoing environmental changes. In the Southern Ocean, Themisto gaudichaudii is predicted to expand its distribution poleward. In the Arctic, the boreal-Atlantic T. abyssorum increases in abundance, resulting in an increased competition with a genuine polar congener. It is not known, however, whether T. gaudichaudii and T. abyssorum have the potential to efficiently adapt to changing water temperatures at their current distribution range or whether they will be shifting their ranges poleward. Methods We exposed the two Themisto species from different geographic populations to temperature-change experiments, a cold treatment and a heat-shock treatment. After that, we carried out transcriptome sequencing to compare gene expression patterns in the different treatments and species. Results We show that under similar heat conditions, T. gaudichaudii differentially expressed more genes (26-fold change) than T. abyssorum. Furthermore, we observed qualitative differences between genetic clusters in T. gaudichaudii. Discussion The differences observed between genetic clusters in T. gaudichaudii suggest that evolutionary divergence can be linked to changes in the regulatory pathways involved in temperature stress. These could influence the capacity of each genetic cluster to cope differently with temperature changes. In contrast to its congeneric species, T. abyssorum showed a pronounced adaptive flexibility to thermal stress; it appears to have the ability to continue its poleward expansion but may also cope with increasing temperatures in its current environments. Our findings contribute to understand the response of two range-shifting Themisto species to thermal stress in view of the environmental gradients they encounter throughout their current or future distribution ... |
format |
Article in Journal/Newspaper |
author |
Martinez-alarcón, Diana Held, Christoph Harms, Lars Auel, Holger Hagen, Wilhelm Havermans, Charlotte |
author_facet |
Martinez-alarcón, Diana Held, Christoph Harms, Lars Auel, Holger Hagen, Wilhelm Havermans, Charlotte |
author_sort |
Martinez-alarcón, Diana |
title |
Race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species |
title_short |
Race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species |
title_full |
Race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species |
title_fullStr |
Race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species |
title_full_unstemmed |
Race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species |
title_sort |
race to the poles: the thermal response of the transcriptome of two range-expanding pelagic amphipod species |
publisher |
Frontiers Media SA |
publishDate |
2024 |
url |
https://archimer.ifremer.fr/doc/00883/99516/109613.pdf https://archimer.ifremer.fr/doc/00883/99516/109614.pdf https://doi.org/10.3389/fmars.2024.1336024 https://archimer.ifremer.fr/doc/00883/99516/ |
geographic |
Arctic Antarctic Southern Ocean |
geographic_facet |
Arctic Antarctic Southern Ocean |
genre |
Antarc* Antarctic Arctic Southern Ocean Themisto abyssorum Themisto Zooplankton |
genre_facet |
Antarc* Antarctic Arctic Southern Ocean Themisto abyssorum Themisto Zooplankton |
op_source |
Frontiers In Marine Science (2296-7745) (Frontiers Media SA), 2024-03 , Vol. 11 , P. 1336024 (13p.) |
op_relation |
https://archimer.ifremer.fr/doc/00883/99516/109613.pdf https://archimer.ifremer.fr/doc/00883/99516/109614.pdf doi:10.3389/fmars.2024.1336024 https://archimer.ifremer.fr/doc/00883/99516/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3389/fmars.2024.1336024 |
container_title |
Frontiers in Marine Science |
container_volume |
11 |
_version_ |
1798844202437574656 |