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Variation in thermal tolerance response associated with geographic location during early development of the neogastropod Ocenebra erinaceus (Linnaeus, 1758)

Variation in thermal tolerance response associated with geographic location during early development of the neogastropod Ocenebra erinaceus (Linnaeus, 1758)
Variation in thermal tolerance response associated with geographic location during early development of the neogastropod Ocenebra erinaceus (Linnaeus, 1758)

Environmental temperature plays an important role in shaping the distribution and abundance of marine ectothermic organisms. As a general rule, larvae and juveniles are more sensitive to thermal stress than adults and, as a consequence, represent key life stages that determine in part the geographic range of a species. Identifying critical thermal limits during ontogeny allows for the prediction of the potential impacts of climate warming on the distribution of marine ectotherms. However, thermal tolerance - and therefore the potential to meet the challenge of warming- is known to vary at population scale for many species. In order to fully appreciate a species' future under climate warming, multiple populations studies from different thermal environments are necessary. In this study, we compared the thermal tolerance response during the intracapsular development of the marine gastropod Ocenebra erinaceus between two geographically separated populations: one from the middle (Solent, UK) and another from the south of the species' geographic range (Arcachon, France). The results show that the thermal tolerance response was influenced by geographic origin. Embryos from the relatively warm-water southern population (France) show a warm-eurythermal tolerance window with optimal temperatures between 12 and 18 °C. On the contrary, embryos from the cold-water northern population (UK) exhibit a narrow, warm-stenothermal, thermal tolerance window with optimal temperatures between 14 and 16 °C. In both populations, temperatures outside of the thermal range cause lethal and sub-lethal effects. Importantly, previously observed dispersal polymorphism was not observed at hatching time in either population in our study. Our study demonstrates that during early developmental stages, embryos are adapted to local thermal conditions and that they live very close to their upper thermal limits. Temperatures outside this range cause detrimental and contrasting effects on embryonic development of O. erinaceus, implying that the effects of future warming will depend on the population response to local environmental history. Our results suggest that global warming could shift the geographical distribution range of O. erinaceus poleward.

Intracapsular development, Intraspecific differences, Neogastropoda, Ocenebra erinaceus, Thermal tolerance
0022-0981
Mardones, Maria Loreto
58972563-9548-4d03-97df-0dbbd7970009
Fenberg, Phillip B.
c73918cd-98cc-41e6-a18c-bf0de4f1ace8
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Hauton, Chris
7706f6ba-4497-42b2-8c6d-00df81676331
Mardones, Maria Loreto
58972563-9548-4d03-97df-0dbbd7970009
Fenberg, Phillip B.
c73918cd-98cc-41e6-a18c-bf0de4f1ace8
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Hauton, Chris
7706f6ba-4497-42b2-8c6d-00df81676331

Mardones, Maria Loreto, Fenberg, Phillip B., Thatje, Sven and Hauton, Chris (2021) Variation in thermal tolerance response associated with geographic location during early development of the neogastropod Ocenebra erinaceus (Linnaeus, 1758). Journal of Experimental Marine Biology and Ecology, 542-543, [151590]. (doi:10.1016/j.jembe.2021.151590).

Record type: Article

Abstract

Environmental temperature plays an important role in shaping the distribution and abundance of marine ectothermic organisms. As a general rule, larvae and juveniles are more sensitive to thermal stress than adults and, as a consequence, represent key life stages that determine in part the geographic range of a species. Identifying critical thermal limits during ontogeny allows for the prediction of the potential impacts of climate warming on the distribution of marine ectotherms. However, thermal tolerance - and therefore the potential to meet the challenge of warming- is known to vary at population scale for many species. In order to fully appreciate a species' future under climate warming, multiple populations studies from different thermal environments are necessary. In this study, we compared the thermal tolerance response during the intracapsular development of the marine gastropod Ocenebra erinaceus between two geographically separated populations: one from the middle (Solent, UK) and another from the south of the species' geographic range (Arcachon, France). The results show that the thermal tolerance response was influenced by geographic origin. Embryos from the relatively warm-water southern population (France) show a warm-eurythermal tolerance window with optimal temperatures between 12 and 18 °C. On the contrary, embryos from the cold-water northern population (UK) exhibit a narrow, warm-stenothermal, thermal tolerance window with optimal temperatures between 14 and 16 °C. In both populations, temperatures outside of the thermal range cause lethal and sub-lethal effects. Importantly, previously observed dispersal polymorphism was not observed at hatching time in either population in our study. Our study demonstrates that during early developmental stages, embryos are adapted to local thermal conditions and that they live very close to their upper thermal limits. Temperatures outside this range cause detrimental and contrasting effects on embryonic development of O. erinaceus, implying that the effects of future warming will depend on the population response to local environmental history. Our results suggest that global warming could shift the geographical distribution range of O. erinaceus poleward.

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variation in thermal tolerance response - Accepted Manuscript
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More information

Accepted/In Press date: 24 May 2021
e-pub ahead of print date: 7 June 2021
Published date: 1 September 2021
Keywords: Intracapsular development, Intraspecific differences, Neogastropoda, Ocenebra erinaceus, Thermal tolerance

Identifiers

Local EPrints ID: 450070
URI: http://eprints.soton.ac.uk/id/eprint/450070
ISSN: 0022-0981
PURE UUID: badc87f6-ab31-4778-8117-7c81b00c38eb
ORCID for Chris Hauton: ORCID iD orcid.org/0000-0002-2313-4226

Catalogue record

Date deposited: 08 Jul 2021 16:30
Last modified: 26 Nov 2021 02:38

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Contributors

Author: Maria Loreto Mardones
Author: Sven Thatje
Author: Chris Hauton ORCID iD

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