Ba/Ca profiles in shells of Pecten maximus – A proxy for specific primary producers rather than bulk phytoplankton

Fröhlich, Lukas; Siebert, Valentin; Walliser, Eric Otto; Thébault, Julien; Jochum, Klaus Peter; Chauvaud, Laurent; Schöne, Bernd R.

doi:10.1016/j.chemgeo.2022.120743

Cited by 15 publications

(15 citation statements)

References 85 publications

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“…Three specimens of the King scallop P. maximus (labeled "PM2", "PM3" and "PM4") were collected alive on 15/11/2019 on the southern coast of the Bay of Brest near Lanvéoc, France (48°17′N 4°30′W) by SCUBA divers at a depth of approximately 8 m (see Fröhlich et al, 2022; Figure 1). Note that water depth in the Bay of Brest varies significantly due to the macrotidal regime with a mean tidal range of 2.8 -5.9m with extreme ranges up to 7.2m (Guillaume-Olivier et al, 2021; Service Hydrographique et Océanographique de la Marine; 2022).…”

Section: Preparation Of P Maximus Specimensmentioning

confidence: 99%

“…Shells were superficially cleaned using a plastic brush and adhering sediment was removed by ultrasonication in deionized water. The flat, left valves were used for elemental and sclerochronological analysis following previous studies on P. maximus (Thébault et al, 2022;Fröhlich et al, 2022).…”

Section: Preparation Of P Maximus Specimensmentioning

confidence: 99%

“…Contrarily, Mn is taken up in thermodynamic equilibrium in the mineral fraction of bivalve shells (Onuma et al, 1979;Soldati et al, 2016), and Mn/Ca ratios in P. conditions (Barats et al, 2008). Similarly, there is strong evidence that Ba/Ca ratios in P. maximus (and other mollusks) record changes in Ba available in the environment linked to primary productivity (e.g., Gillikin et al, 2008;Thébault et al, 2009;Fröhlich et al, 2022). This relationship would explain the skewed (skewness > 1; S8) character of the Ba/Ca records and the correlation between Ba/Ca and Mn/Ca in our P. maximus specimens, as the reducing conditions following peaks in primary productivity favor the remobilization of Mn into the water column causing shortlived simultaneous increases in Ba/Ca and Mn/Ca in the shells (Dehairs et al, 1989;Barats et al, 2008;.…”

Section: Spectral Analysismentioning

confidence: 99%

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Ultradian rhythms in shell composition of photosymbiotic and non-photosymbiotic mollusks

Winter

Killam

Fröhlich

et al. 2022

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Abstract. The chemical composition of mollusk shells is a useful tool in (paleo)climatology since it captures inter- and intra-annual variability in environmental conditions. Trace element and stable isotope analyses with improved sampling resolution now enable the use of mollusk shells for paleoenvironmental reconstructions at a daily to sub-daily resolution. Here, we discuss hourly resolved Mg/Ca, Mn/Ca, Sr/Ca and Ba/Ca profiles measured by laser ablation ICP-MS through shells of photosymbiotic giant clams (Tridacna maxima, Tridacna squamosa and Tridacna squamosina) and the non-photosymbiotic scallop Pecten maximus. Precise sclerochronological age models and spectral analysis allowed us to extract daily and tidal rhythms in the trace element composition of these shells. We find significant expression of these periodicities but conclude that this cyclicity explains less than 10 % of the sub-annual variance in trace element profiles. Tidal and diurnal rhythms explain variability of at most 0.2 mmol/mol (~10 % of mean value) in Mg/Ca and Sr/Ca, while Mn/Ca and Ba/Ca cyclicity has a median amplitude of less than 2 µmol/mol (~40 % and 80 % of the mean of Mn/Ca and Ba/Ca, respectively). Daily periodicity in Sr/Ca and Ba/Ca is stronger in Tridacna than in Pecten, with Pecten showing stronger tidal periodicity. One T. squamosa specimen which grew under a sunshade exhibits some of the strongest diurnal cyclicity. Daily cycles in trace element composition of giant clams are therefore unlikely to be driven by variations in direct insolation itself but reflect an inherent biological rhythmic process affecting element incorporation. Finally, the large amount of trace element variability unexplained by periodic variability highlights the dominance of aperiodic processes in mollusk physiology and/or environmental conditions on shell composition at the sub-daily scale. Future studies should aim to investigate whether part of this aperiodic variability in shell chemistry reliably records weather patterns or circulation changes in the paleoenvironment.

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Section: Preparation Of P Maximus Specimensmentioning

confidence: 99%

Section: Preparation Of P Maximus Specimensmentioning

confidence: 99%

Section: Spectral Analysismentioning

confidence: 99%

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Ultradian rhythms in shell composition of photosymbiotic and non-photosymbiotic mollusks

Winter

Killam

Fröhlich

et al. 2022

Preprint

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“…The Ba/Ca ratios of shallow-water bivalve shells have been used to reconstruct the primary productivity of their living environment, which is often related to phytoplankton blooms (Vander Putten et al, 2000;Kelemen et al, 2019;Fröhlich et al, 2022), the amplitude of the chlorophyll peaks is often used to explain the peak value of the Ba/Ca ratio of bivalve shells (Goodwin et al, 2013;Doréet al, 2020). Therefore, as long as the Ba/Ca ratio of bivalve shells is not strongly physiologically controlled, the change in Ba in the environment can be reflected in shells because the Ba/Ca ratio of bivalve shells is usually related to the Ba/Ca ratio of environmental water (Gillikin et al, 2006;Goodwin et al, 2013).…”

Section: Factors Controlling Te/ca Ratios Of Seep Bivalve Shellsmentioning

confidence: 99%

Archives of short-term fluid flow dynamics and possible influence of human activities at methane seeps: Evidence from high-resolution element geochemistry of chemosynthetic bivalve shells

et al. 2022

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The natural dynamics of fluid flow at methane seeps and increasingly human activities influence the biogeochemistry of the microenvironment and further determine the activity of the chemosynthetic communities within these ecosystems. However, ways to reconstruct short-term fluid flow dynamics and to decipher the influence of scientific exploration at seeps are limited. In this study, we present high-resolution trace elements/Ca ratios (Li/Ca, Mg/Ca, Ti/Ca, Mn/Ca, Co/Ca, Cu/Ca, Zn/Ca, Sr/Ca, Zr/Ca, Mo/Ca, Ba/Ca, Th/Ca and U/Ca ratios) from the shells of two species of chemosymbiotic bivalves (the thiotrophic vesicomyid clam Archivesica marissinica and the methanotrophic mussel Gigantidas haimaensis) from the Haima cold seeps of the South China Sea. We found that the complex distribution patterns of some trace elements (Mg/Ca, Sr/Ca, Mo/Ca and U/Ca ratios) in G. haimaensis are largely controlled by mineral composition or age. The observation of Co/Ca and Ba/Ca ratios in both species indicate strong physiological and environmental control on the incorporation of trace elements during the biomineralization process. Besides, the distribution patterns of other trace elements provide information that can be used to discuss open issues such as the loss of trace elements after death of the bivalves, and the possible influence of human activities such as sediment disturbance. Overall, this study emphasizes the potential for using high-resolution element geochemistry of seep bivalve shells to reveal the physiological and environmental factors that control the growth of bivalves, and to elucidate the potential history of fluid discharge at cold seeps.

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“…Unlike the great scallop, P. maximus, which was the focus of many previous studies (e.g., Laing, 2002;Chauvaud et al, 2005;Andersen et al, 2011;Chauvaud et al, 2012;Lavaud et al, 2014;Götze et al, 2020;Fröhlich et al, 2022;Thebault et al, 2022), scientific research on P. jacobaeus is relatively limited (e.g., Mattei and Pellizzato, 1996;Peharda et al, 2003;Katsanevakis, 2005;Margušand Teskeredzǐc, 2005;Peharda et al, 2019). Based on genetic studies, some authors suggested that these two species could represent a single species or races/subspecies (Wilding et al, 1999;Saavedra and Peña, 2004;Saavedra and Peña, 2005;Morvezen et al, 2016;Vendrami et al, 2019) as their phylogenetic status is not completely clear.…”

Section: Introductionmentioning

confidence: 99%

Different life strategies of the three commercially exploited scallop species living under the same environmental conditions

Ezgeta-Balić

Peharda²,

Schöne³

et al. 2022

Front. Mar. Sci.

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To understand the response of marine species to a changing environment, it is crucial to have deep insight into their main biological traits. This study used a multi-species approach to comparatively analyse the reproductive and growth strategies of three commercially important scallop species. Target taxa were larger sized Mediterranean scallop Pecten jacobeaus, and two smaller sized species Aequipecten opercularis and Flexopecten glaber. Specimens were collected at approximate monthly intervals from February 2017 to October 2018 from a commercial beam trawl in the northern Adriatic area (west coast of the Istria peninsula, 25-35 m depth). Three different complementary methods were applied to obtain comprehensive knowledge about the reproductive cycle including assessment of the gonadosomatic index (GSI), histological analysis of gonad tissue, and measuring oocyte size. Growth strategies of three target species were analyzed using high-resolution stable oxygen isotope data that were temporally aligned on sea water temperature data obtained by AdriSC ROMS model. Results indicate diverse strategies employed by these taxonomically related species exposed to the same environmental conditions. Pecten jacobaeus spawned in the late summer and early fall, while shell growth slowed down during warmer season. Aequipecten opercularis spawned in the winter and slowed down shell deposition process during the cold season. Spawning of F. glaber occurred during early to mid-summer and growth slowed down during warmer season. This study provides an important scientific baseline for sustainable management and future aquaculture attempts of scallops.

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Ba/Ca profiles in shells of Pecten maximus – A proxy for specific primary producers rather than bulk phytoplankton

Cited by 15 publications

References 85 publications

Ultradian rhythms in shell composition of photosymbiotic and non-photosymbiotic mollusks

Ultradian rhythms in shell composition of photosymbiotic and non-photosymbiotic mollusks

Archives of short-term fluid flow dynamics and possible influence of human activities at methane seeps: Evidence from high-resolution element geochemistry of chemosynthetic bivalve shells

Different life strategies of the three commercially exploited scallop species living under the same environmental conditions

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