Local differentiation in heat response of Laminaria digitata at the range edges
In recent years, kelp populations worldwide have faced decline and extirpation at their equatorward limits, while models predict a poleward shift of kelp ecosystems during climate change. To gain an understanding of local thermal adaptation and response plasticity in a forest-forming kelp species, w...
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ftawi:oai:epic.awi.de:50882 2023-05-15T17:05:15+02:00 Local differentiation in heat response of Laminaria digitata at the range edges Liesner, Daniel Fouqueau, Louise Valero, Myriam Roleda, Michael Pearson, Gareth A. Bischof, Kai Valentin, Klaus-Ulrich Bartsch, Inka 2020-01-07 application/pdf https://epic.awi.de/id/eprint/50882/ https://epic.awi.de/id/eprint/50882/1/20200106_Liesner_BPS_final.pdf https://hdl.handle.net/10013/epic.74af27d8-c766-46db-b868-3d9d0c35a959 https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/50882/1/20200106_Liesner_BPS_final.pdf https://hdl.handle.net/ Liesner, D. orcid:0000-0002-2125-9498 , Fouqueau, L. , Valero, M. , Roleda, M. , Pearson, G. A. , Bischof, K. , Valentin, K. U. orcid:0000-0001-7401-9423 and Bartsch, I. orcid:0000-0001-7609-2149 (2020) Local differentiation in heat response of Laminaria digitata at the range edges , 68th British Phycological Society Meeting, Plymouth, UK, 6 January 2020 - 9 January 2020 . hdl:10013/epic.74af27d8-c766-46db-b868-3d9d0c35a959 EPIC368th British Phycological Society Meeting, Plymouth, UK, 2020-01-06-2020-01-09 Conference notRev 2020 ftawi 2021-12-24T15:45:09Z In recent years, kelp populations worldwide have faced decline and extirpation at their equatorward limits, while models predict a poleward shift of kelp ecosystems during climate change. To gain an understanding of local thermal adaptation and response plasticity in a forest-forming kelp species, we assessed populations of Laminaria digitata along its entire European distribution range for their capacity to withstand high temperature stress, and analysed population structure and diversity with microsatellite markers (n=12). We sampled wild meristematic L. digitata material (n=30) at six locations ranging from Kongsfjorden, Spitsbergen, to the southernmost distribution limit in Quiberon, France. In a heatwave experiment, we subjected samples from all locations to the same, sublethal temperature treatments (15–23°C for eight days including acclimation) and assessed growth, storage compounds, photosynthetic efficiency and pigment contents as response traits. Recovery was assessed following seven days at 15°C. Microsatellite genotyping revealed all sampled populations to be genetically distinct entities, underlying strong regional structuring between southern and northern clades. Genetic diversity was highest at the southern distribution limit in Quiberon and lowest in the geographically isolated population on the island of Helgoland in the North Sea. The physiological response of L. digitata to temperature was similar over the entire distribution range and did not reflect the mean temperature gradient along the latitudinal gradient. However, material from Spitsbergen and Helgoland presented subtle differentiations in their temperature responses, which reflect long-term local temperature histories at these sites. Finally, a heatwave reaching 23°C for five days led to a cessation of growth, from which none of the sampled populations recovered. Our results suggest that the heat stress response of L. digitata is generally stable across its distribution range, despite strong genetic structuring of the populations. Slight local differentiation occurred in populations from the most distinct thermal environments, but 23°C posed a growth limit for all populations. This implies that local adaptation in trailing edge populations of L. digitata might not alleviate detrimental effects of global warming. Conference Object Kongsfjord* Kongsfjorden Spitsbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Helgoland |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
In recent years, kelp populations worldwide have faced decline and extirpation at their equatorward limits, while models predict a poleward shift of kelp ecosystems during climate change. To gain an understanding of local thermal adaptation and response plasticity in a forest-forming kelp species, we assessed populations of Laminaria digitata along its entire European distribution range for their capacity to withstand high temperature stress, and analysed population structure and diversity with microsatellite markers (n=12). We sampled wild meristematic L. digitata material (n=30) at six locations ranging from Kongsfjorden, Spitsbergen, to the southernmost distribution limit in Quiberon, France. In a heatwave experiment, we subjected samples from all locations to the same, sublethal temperature treatments (15–23°C for eight days including acclimation) and assessed growth, storage compounds, photosynthetic efficiency and pigment contents as response traits. Recovery was assessed following seven days at 15°C. Microsatellite genotyping revealed all sampled populations to be genetically distinct entities, underlying strong regional structuring between southern and northern clades. Genetic diversity was highest at the southern distribution limit in Quiberon and lowest in the geographically isolated population on the island of Helgoland in the North Sea. The physiological response of L. digitata to temperature was similar over the entire distribution range and did not reflect the mean temperature gradient along the latitudinal gradient. However, material from Spitsbergen and Helgoland presented subtle differentiations in their temperature responses, which reflect long-term local temperature histories at these sites. Finally, a heatwave reaching 23°C for five days led to a cessation of growth, from which none of the sampled populations recovered. Our results suggest that the heat stress response of L. digitata is generally stable across its distribution range, despite strong genetic structuring of the populations. Slight local differentiation occurred in populations from the most distinct thermal environments, but 23°C posed a growth limit for all populations. This implies that local adaptation in trailing edge populations of L. digitata might not alleviate detrimental effects of global warming. |
format |
Conference Object |
author |
Liesner, Daniel Fouqueau, Louise Valero, Myriam Roleda, Michael Pearson, Gareth A. Bischof, Kai Valentin, Klaus-Ulrich Bartsch, Inka |
spellingShingle |
Liesner, Daniel Fouqueau, Louise Valero, Myriam Roleda, Michael Pearson, Gareth A. Bischof, Kai Valentin, Klaus-Ulrich Bartsch, Inka Local differentiation in heat response of Laminaria digitata at the range edges |
author_facet |
Liesner, Daniel Fouqueau, Louise Valero, Myriam Roleda, Michael Pearson, Gareth A. Bischof, Kai Valentin, Klaus-Ulrich Bartsch, Inka |
author_sort |
Liesner, Daniel |
title |
Local differentiation in heat response of Laminaria digitata at the range edges |
title_short |
Local differentiation in heat response of Laminaria digitata at the range edges |
title_full |
Local differentiation in heat response of Laminaria digitata at the range edges |
title_fullStr |
Local differentiation in heat response of Laminaria digitata at the range edges |
title_full_unstemmed |
Local differentiation in heat response of Laminaria digitata at the range edges |
title_sort |
local differentiation in heat response of laminaria digitata at the range edges |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/50882/ https://epic.awi.de/id/eprint/50882/1/20200106_Liesner_BPS_final.pdf https://hdl.handle.net/10013/epic.74af27d8-c766-46db-b868-3d9d0c35a959 https://hdl.handle.net/ |
geographic |
Helgoland |
geographic_facet |
Helgoland |
genre |
Kongsfjord* Kongsfjorden Spitsbergen |
genre_facet |
Kongsfjord* Kongsfjorden Spitsbergen |
op_source |
EPIC368th British Phycological Society Meeting, Plymouth, UK, 2020-01-06-2020-01-09 |
op_relation |
https://epic.awi.de/id/eprint/50882/1/20200106_Liesner_BPS_final.pdf https://hdl.handle.net/ Liesner, D. orcid:0000-0002-2125-9498 , Fouqueau, L. , Valero, M. , Roleda, M. , Pearson, G. A. , Bischof, K. , Valentin, K. U. orcid:0000-0001-7401-9423 and Bartsch, I. orcid:0000-0001-7609-2149 (2020) Local differentiation in heat response of Laminaria digitata at the range edges , 68th British Phycological Society Meeting, Plymouth, UK, 6 January 2020 - 9 January 2020 . hdl:10013/epic.74af27d8-c766-46db-b868-3d9d0c35a959 |
_version_ |
1766059679906004992 |