A multiaxial growth analysis of stable isotopes in the modern shell of <i>Saxidomus gigantea</i>: Implications for sclerochronology studies

Kingston, Andrew; Gröcke, Darren R.; Burchell, Meghan

doi:10.1029/2007gc001807

Cited by 10 publications

(8 citation statements)

References 12 publications

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“…2005; Schöne et al . 2005b; Surge and Walker 2006), it is not necessary to do so with S. gigantea , because if only a portion of the ventral margin is preserved, it will still produce the same seasonality results if sampled perpendicular to the growth lines (Kingston et al . 2008).…”

Section: Study Area and Criteria For The Anlaysis Of S Giganteamentioning

confidence: 99%

Refining Estimates for the Season of Shellfish Collection on the Pacific Northwest Coast: Applying High‐resolution Stable Oxygen Isotope Analysis and Sclerochronology

Burchell

Cannon

Hallmann³

et al. 2012

Archaeometry

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Stable oxygen isotopes from estuarine bivalve carbonate from Saxidomus gigantea were analysed combined with high‐resolution sclerochronology from modern and archaeological shells from British Columbia, Canada, to determine the seasonality of shellfish collection from the archaeological site of Namu. The combination of high‐resolution sclerochronology and a micro‐milled sampling strategy for δ18O analysis permits a precise estimate of archaeological seasonality, because seasonal freshwater influxes and changes in temperature have dual effects on the δ18O value of the shell. Sclerochronological analysis identifies the timing and duration of growth that is temporally aligned to stable oxygen isotope results, since δ18Oshell appears to be strongly influenced by seasonal inputs of very low δ18O snowmelt‐water from adjacent coastal mountain ranges. The results show that shellfish were collected year‐round at this site over a 4000‐year period, and these data combined with other zooarchaeological lines of evidence support the interpretation of year‐round occupation.

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Section: Study Area and Criteria For The Anlaysis Of S Giganteamentioning

confidence: 99%

Refining Estimates for the Season of Shellfish Collection on the Pacific Northwest Coast: Applying High‐resolution Stable Oxygen Isotope Analysis and Sclerochronology

Burchell

Cannon

Hallmann³

et al. 2012

Archaeometry

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“…The lower and upper growth temperature thresholds are ,4-5 uC and 20 uC, respectively (Bernard, 1983;Gillikin et al, 2005a;Hallmann et al, 2009). Despite its potential importance for paleoclimate studies, the butter clam has rarely been studied by means of sclerochronological techniques (Gillikin et al 2005a(Gillikin et al , 2005bKingston et al, 2008;Hallmann et al, 2009). In its shell, S. gigantea produces distinct lunar daily (circadian), fortnightly, and annual growth increments, which can be used to assign precise calendar dates to each portion of the shell (Hallmann et al, 2009).…”

Section: Introductionmentioning

confidence: 98%

An Improved Understanding of the Alaska Coastal Current: The Application of a Bivalve Growth-Temperature Model to Reconstruct Freshwater-Influenced Paleoenvironments

Hallmann¹,

Schöne²,

Irvine³

et al. 2011

PALAIOS

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Shells of intertidal bivalve mollusks contain sub-seasonally to interannually resolved records of temperature and salinity variations in coastal settings. Such data are essential to understand changing land-sea interactions through time, specifically atmospheric (precipitation rate, glacial meltwater, river discharge) and oceanographic circulation patterns; however, independent temperature and salinity proxies are currently not available. We established a model for reconstructing daily water temperatures with an average standard error of ,1.3 6C based on variations in the width of lunar daily growth increments of Saxidomus gigantea from southwestern Alaska, United States. Temperature explains 70% of the variability in shell growth. When used in conjunction with stable oxygen isotope data, this approach can also be used to identify changes in past seawater salinity. This study provides a better understanding of the hydrological changes related to the Alaska Coastal Current (ACC). In combination with d 18 O shell values, increment-derived temperatures were used to estimate salinity changes with an average error of 1.4 ± 1.1 PSU. Our model was calibrated and tested with modern shells and then applied to archaeological specimens. As derived from the model, the time interval of 988-1447 cal yr BP was characterized by ,1-2 6C colder and much drier (2-5 PSU) summers. During that time, the ACC was likely flowing much more slowly than at present. In contrast, between 599-1014 cal yr BP, the Aleutian low may have been stronger, which resulted in a 3 6C temperature decrease during summers and 1-2 PSU fresher conditions than today; the ACC was probably flowing more quickly at that time. The shell growth-temperature model can be used to estimate seasonal to interannual salinity and temperature changes in freshwater-influenced environments through time.

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“…The calcitic Pecten maximus, although only providing a short record (< 1 yr), allows precise matching between shell and environmental variables. Shells of both of these species have been studied extensively (e.g., Chauvaud et al 1998Chauvaud et al , 2005Lorrain et al, 2000Lorrain et al, , 2005De Ridder et al, 2004;Gillikin et al, 2005a, b;Gillikin 2005;Freitas et al, 2006;Kingston et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

Synchronous barium peaks in high-resolution profiles of calcite and aragonite marine bivalve shells

et al. 2008

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Barium/Calcium profiles of bivalve shells are characterized by flat background signals periodically interrupted with sharp peaks, with the background signals correlated with water Ba/Ca. To test if the peaks are an environmental signal related to productivity, we analyzed high resolution Ba/Ca profiles in bivalve shells that grew adjacent to one another. Two aragonitic Saxidomus giganteus show remarkable similarity over a decade of growth, clearly indicating an environmental forcing. Four calcitic Pecten maximus shells also record synchronous Ba/Ca peaks, again indicating an exogenous control. The Ba/Ca peaks, however, start ~40 days after the crash of the bloom, while sedimentation takes place immediately following the bloom. Barite formation in settling phytoplankton flocs, as has been previously proposed, is clearly not the cause of these peaks. Other possible causes such as dissolved Ba in ambient water, spawning, shell organic matter content and kinetic growth rate effects are also discussed, but none provide satisfactory

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A multiaxial growth analysis of stable isotopes in the modern shell of Saxidomus gigantea: Implications for sclerochronology studies

Cited by 10 publications

References 12 publications

Refining Estimates for the Season of Shellfish Collection on the Pacific Northwest Coast: Applying High‐resolution Stable Oxygen Isotope Analysis and Sclerochronology

Refining Estimates for the Season of Shellfish Collection on the Pacific Northwest Coast: Applying High‐resolution Stable Oxygen Isotope Analysis and Sclerochronology

An Improved Understanding of the Alaska Coastal Current: The Application of a Bivalve Growth-Temperature Model to Reconstruct Freshwater-Influenced Paleoenvironments

Synchronous barium peaks in high-resolution profiles of calcite and aragonite marine bivalve shells

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