High frequency Barium profiles in shells of the Great Scallop &amp;lt;i&amp;gt;Pecten maximus&amp;lt;/i&amp;gt;: a methodical long-term and multi-site survey in Western Europe

Barats, Aurélie; Amouroux, David; Chauvaud, Laurent; Pécheyran, Christophe; Lorrain, Anne; Thébault, Julien; Church, Thomas M.; Donard, Olivier F. X.

doi:10.5194/bg-6-157-2009

Cited by 37 publications

(25 citation statements)

References 57 publications

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“…The background values varied between 0.4 and ∼ 2 µmol mol −1 being consistent with those reported earlier (Barats et al, 2009), and did not show any obvious variation within baskets that could not have been explained by averaging error (Table 3). Measured maximum Ba/Ca values, on the other hand, varied between 3.1-76.1 µmol mol −1 , demonstrating different peak values among shells from a same basket (Table 3).…”

Section: Potential Proxies Of Primary Productionsupporting

confidence: 90%

“…Gillikin et al (2008) reported a comparable 40-day lag between phytoplankton bloom and shell Ba/Ca peak in the great scallop (Pecten maximus). Dissolved barium from seawater, which in turn is sometimes connected with phytoplankton blooms (Fisher et al, 1991;Barats et al, 2009), has been found to be consistently incorporated into the calcitic blue mussel (Mytilus edulis) and great scallop as well as aragonitic Saxidoumus giganteus shells with a partition coefficient of approximately 0.1 (Gillikin et al, 2006(Gillikin et al, , 2008Tabouret et al, 2012).…”

Section: Potential Proxies Of Primary Productionmentioning

confidence: 99%

“…Barium-to-calcium provides the most consistent elemental ratio signal in bivalve shells: Ba/Ca profiles are characterized by a flat background signal that is periodically interrupted by sharp peaks in a wide range of species across various habitats and latitudes (Stecher et al, 1996;Toland et al, 2000;Vander Putten et al, 2000;Torres et al, 2001;Lazareth et al, 2003;Gillikin et al, 2006Gillikin et al, , 2008Barats et al, 2009;Carroll et al, 2009;Elliot et al, 2009;Thébault et al, 2009a;Marali et al, 2015). Barium-to-calcium ratios have been shown to reflect Ba concentration in ambient seawater (Gillikin et al, 2006;Tabouret et al, 2012;Poulain et al, 2015) that might in some cases be associated with primary productivity.…”

Section: Introductionmentioning

confidence: 99%

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A key to the past? Element ratios as environmental proxies in two Arctic bivalves

Vihtakari

Ambrose

Renaud³

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Understanding rapid climate change in the Arctic and its ecosystem implications requires more information on the environment at temporal resolutions and time-periods not available from instrumental records. Such information can be acquired through geochemical proxy records, but sub-annual records are rare. We analyzed shell material of bivalve mollusks (Serripes groenlandicus and Ciliatocardium ciliatum) placed on oceanographic moorings for one year in two Arctic fjords to assess the potential use of shell elemental ratios as environmental proxies.

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Section: Potential Proxies Of Primary Productionsupporting

confidence: 90%

Section: Potential Proxies Of Primary Productionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A key to the past? Element ratios as environmental proxies in two Arctic bivalves

Vihtakari

Ambrose

Renaud³

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…There are other studies which suggest that Ba/Ca ratios in bivalve shells track intraannual variability in river discharge (Carroll et al, 2009) or salinity (Gillikin et al, 2006(Gillikin et al, , 2008Poulain et al, 2015). Poulain et al (2015) confirmed the conclusion of Barats et al (2009), working with only the background Ba/Ca signal, that there is a strong inverse correlation between salinity and Ba/Ca shell , which suggests that Ba/Ca shell could offer a highresolution proxy for the reconstruction of salinity fluctuations within estuarine and nearshore waters and could also be used to distinguish the salinity and temperature signals in the stable oxygen isotope ratio. They also found a positive correlation between Ba/Ca shell and Ba/Ca sw .…”

Section: Ba/casupporting

confidence: 67%

“…Specifically, the incorporation of elements into the shell matrix can be linked to environmental changes (e.g., variability of elements in seawater, primary productivity, eutrophication; Barats et al, 2008Barats et al, , 2009Barats et al, , 2010Gillikin et al, 2006;Holland et al, 2014), so that trace element and heavy metal concentrations in bivalve shells can provide suitable bioindicators (Figure 11) for some descriptors of the Marine Framework Strategy Directive. It remains the case that more needs to be known about the relationship between bioavailability and incorporation of elements into the shell calcite, so that the shell concentrations can be robustly interpreted.…”

Section: Discussionmentioning

confidence: 99%

The Application of Long-Lived Bivalve Sclerochronology in Environmental Baseline Monitoring

Steinhardt¹,

Butler

Carroll

et al. 2016

Front. Mar. Sci.

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Assessments of the impact of construction, operation, and removal of large infrastructures and other human activities on the marine environment are limited because they do not fully quantify the background baseline conditions and relevant scales of natural variability. Baselines as defined in Environmental Impact Assessments typically reflect the status of the environment and its variability drawn from published literature and augmented with some short term site specific characterization. Consequently, it can be difficult to determine whether a change in the environment subsequent to industrial activity is within or outside the range of natural background variability representative of an area over decades or centuries. An innovative approach that shows some promise in overcoming the limitations of traditional baseline monitoring methodology involves the analysis of shell material (sclerochronology) from molluscs living upon or within the seabed in potentially affected areas. Bivalves especially can be effective biomonitors of their environment over a wide range of spatial and temporal scales. A rapidly expanding body of research has established that numerous characteristics of the environment can be reflected in morphological and geochemical properties of the carbonate material in bivalve shells, as well as in functional responses such as growth rates. In addition, the annual banding pattern in shells can provide an absolute chronometer of environmental variability and/or industrial effects. Further, some species of very long-lived bivalves can be crossdated back in time, like trees, by comparing these annual banding patterns in their shells. It is therefore feasible to develop extended timeseries of certain marine environmental variables that can provide important insights into long temporal scales of baseline variability. We review recent innovative work on the shell structure, morphology, and geochemistry of bivalves and conclude that they have substantial potential for use as monitors of environmental variability and the effects of pollutants and disturbance.

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GABA is an inhibitory neurotransmitter in the neural circuit regulating metamorphosis in a marine snail

Biscocho

Cook

Long

et al. 2018

Developmental Neurobiology

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The marine mud snail, Tritia (=Ilyanassa) obsoleta, displays a biphasic life cycle. During the initial phase of early development, embryos hatch from benthic egg capsules to become weakly swimming veliger larvae. In the second phase, adult T. obsoleta are facultative carnivores and major agents of community disturbance. Metamorphosis is the irreversible developmental event that links these two life history stages. When physiologically competent, larvae can respond to appropriate environmental cues by settling onto their mudflat habitat and transforming themselves into miniature adult snails. Two neurotransmitters-serotonin and nitric oxide-have opposing effects on the metamorphic process in this species. In multiple other species of gastropod and bivalve molluscs, a third neurotransmitter, the classically inhibitory compound γ-aminobutyric acid (GABA), can induce settlement or metamorphosis upon external application to competent larvae. In this situation, GABA is presumed to mimic the action of ligands from the juvenile environment that bind to larval chemosensory receptors and activate the metamorphic pathway. Results of our experiments contradict this commonly reported action of GABA on molluscan larvae. External application of GABA to competent larvae of T. obsoleta elicited no response, but instead attenuated the action of serotonin (5-HT), a metamorphic inducer. Our investigations into the responses of larval T. obsoleta to multiple GABAergic reagents support our hypothesis that GABA functions internally as a neurotransmitter in the pathway that controls the initiation of metamorphosis. Our results also suggest that GABA acts directly on or downstream from serotonergic neurons to regulate the metamorphosis-inducing effects of this neurotransmitter. © 2018 Wiley Periodicals, Inc. Develop Neurobiol 78: 736-753, 2018.

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High frequency Barium profiles in shells of the Great Scallop <i>Pecten maximus</i>: a methodical long-term and multi-site survey in Western Europe

Cited by 37 publications

References 57 publications

A key to the past? Element ratios as environmental proxies in two Arctic bivalves

A key to the past? Element ratios as environmental proxies in two Arctic bivalves

The Application of Long-Lived Bivalve Sclerochronology in Environmental Baseline Monitoring

GABA is an inhibitory neurotransmitter in the neural circuit regulating metamorphosis in a marine snail

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