Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska
An increase in anthropogenic carbon dioxide is driving oceanic chemical shifts resulting in a long-term global decrease in ocean pH, colloquially termed ocean acidification (OA). Previous studies have demonstrated that OA can have negative physiological consequences for calcifying organisms, especia...
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ftdoajarticles:oai:doaj.org/article:999fc89c1fcf453db4935799f76c2494 2024-02-27T08:44:13+00:00 Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska Marina W. Alcantar Jeff Hetrick Jacqueline Ramsay Amanda L. Kelley 2024-01-01T00:00:00Z https://doi.org/10.3389/fmars.2024.1253702 https://doaj.org/article/999fc89c1fcf453db4935799f76c2494 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2024.1253702/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2024.1253702 https://doaj.org/article/999fc89c1fcf453db4935799f76c2494 Frontiers in Marine Science, Vol 11 (2024) ocean acidification vaterite biomineralogy Siliqua patula variability larval response Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2024 ftdoajarticles https://doi.org/10.3389/fmars.2024.1253702 2024-01-28T02:05:40Z An increase in anthropogenic carbon dioxide is driving oceanic chemical shifts resulting in a long-term global decrease in ocean pH, colloquially termed ocean acidification (OA). Previous studies have demonstrated that OA can have negative physiological consequences for calcifying organisms, especially during early life-history stages. However, much of the previous research has focused on static exposure to future OA conditions, rather than variable exposure to elevated pCO2, which is more ecologically relevant for nearshore species. This study examines the effects of OA on embryonic and larval Pacific razor clams (Siliqua patula), a bivalve that produces a concretion during early shell development. Larvae were spawned and cultured over 28 days under three pCO2 treatments: a static high pCO2 of 867 μatm, a variable, diel pCO2 of 357 to 867 μatm, and an ambient pCO2 of 357 μatm. Our results indicate that the calcium carbonate polymorphism of the concretion phase of S. patula was amorphous calcium carbonate which transitioned to vaterite during the advanced D-veliger stage, with a final polymorphic shift to aragonite in adults, suggesting an increased vulnerability to dissolution under OA. However, exposure to elevated pCO2 appeared to accelerate the transition of larval S. patula from the concretion stage of shell development to complete calcification. There was no significant impact of OA exposure to elevated or variable pCO2 conditions on S. patula growth or HSP70 and calmodulin gene expression. This is the first experimental study examining the response of a concretion producing bivalve to future predicted OA conditions and has important implications for experimentation on larval mollusks and bivalve management. Article in Journal/Newspaper Ocean acidification Alaska Directory of Open Access Journals: DOAJ Articles Pacific Frontiers in Marine Science 11 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ocean acidification vaterite biomineralogy Siliqua patula variability larval response Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
ocean acidification vaterite biomineralogy Siliqua patula variability larval response Science Q General. Including nature conservation geographical distribution QH1-199.5 Marina W. Alcantar Jeff Hetrick Jacqueline Ramsay Amanda L. Kelley Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska |
topic_facet |
ocean acidification vaterite biomineralogy Siliqua patula variability larval response Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
An increase in anthropogenic carbon dioxide is driving oceanic chemical shifts resulting in a long-term global decrease in ocean pH, colloquially termed ocean acidification (OA). Previous studies have demonstrated that OA can have negative physiological consequences for calcifying organisms, especially during early life-history stages. However, much of the previous research has focused on static exposure to future OA conditions, rather than variable exposure to elevated pCO2, which is more ecologically relevant for nearshore species. This study examines the effects of OA on embryonic and larval Pacific razor clams (Siliqua patula), a bivalve that produces a concretion during early shell development. Larvae were spawned and cultured over 28 days under three pCO2 treatments: a static high pCO2 of 867 μatm, a variable, diel pCO2 of 357 to 867 μatm, and an ambient pCO2 of 357 μatm. Our results indicate that the calcium carbonate polymorphism of the concretion phase of S. patula was amorphous calcium carbonate which transitioned to vaterite during the advanced D-veliger stage, with a final polymorphic shift to aragonite in adults, suggesting an increased vulnerability to dissolution under OA. However, exposure to elevated pCO2 appeared to accelerate the transition of larval S. patula from the concretion stage of shell development to complete calcification. There was no significant impact of OA exposure to elevated or variable pCO2 conditions on S. patula growth or HSP70 and calmodulin gene expression. This is the first experimental study examining the response of a concretion producing bivalve to future predicted OA conditions and has important implications for experimentation on larval mollusks and bivalve management. |
format |
Article in Journal/Newspaper |
author |
Marina W. Alcantar Jeff Hetrick Jacqueline Ramsay Amanda L. Kelley |
author_facet |
Marina W. Alcantar Jeff Hetrick Jacqueline Ramsay Amanda L. Kelley |
author_sort |
Marina W. Alcantar |
title |
Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska |
title_short |
Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska |
title_full |
Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska |
title_fullStr |
Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska |
title_full_unstemmed |
Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska |
title_sort |
examining the impacts of elevated, variable pco2 on larval pacific razor clams (siliqua patula) in alaska |
publisher |
Frontiers Media S.A. |
publishDate |
2024 |
url |
https://doi.org/10.3389/fmars.2024.1253702 https://doaj.org/article/999fc89c1fcf453db4935799f76c2494 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification Alaska |
genre_facet |
Ocean acidification Alaska |
op_source |
Frontiers in Marine Science, Vol 11 (2024) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2024.1253702/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2024.1253702 https://doaj.org/article/999fc89c1fcf453db4935799f76c2494 |
op_doi |
https://doi.org/10.3389/fmars.2024.1253702 |
container_title |
Frontiers in Marine Science |
container_volume |
11 |
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1792052605831086080 |