The potential of marine bivalve Spisula sachalinensis as a marine temperature record

Branscombe, Tansy; Lee‐Thorp, Julia A.; Leng, Melanie J.

doi:10.1016/j.palaeo.2021.110634

Cited by 4 publications

(7 citation statements)

References 55 publications

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“…These positive spikes were especially apparent when compared with the rest of the sequences from these individual shells, as well as results from other shells analysed, where δ 13 C is relatively stable at $ +1 ± 0.5‰. S. sachalinensis is a well-researched species, [20][21][22][23][24][25][26][27][28][29] and sudden positive δ 13 C excursions of this nature are ecologically implausible.…”

Section: Resultsmentioning

confidence: 79%

“…The sectioned surface of the shell was held angled down towards the aluminium foil to direct the shell powder onto the foil and reduce sample loss. Each sample was checked for purity of the aragonite using Fourier-transform infrared spectroscopy, 20 as per Loftus et al 39 Once in the microcentrifuge tubes, the powders obtained using both the hand-drilling and micromilling methods were analysed identically, using a dual-inlet Isoprime mass spectrometer interfaced with a Multiprep autosampler (hereafter referred to as the Isoprime plus Multiprep) at the BGS. We aimed to produce 50 to 100 μg of carbonate per sample for isotope analysis; however, micromilled samples were often below 50 μg, smaller than those produced by hand drilling which were typically >100 μg (with 50-100 μg subsamples used for analysis).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…This study was prompted by the results of δ 13 C and δ 18 O analysis on archaeological samples of the marine bivalve Spisula sachalinensisa large and long-lived bivalve found in the northwest Pacific. 20…”

Section: Introductionmentioning

confidence: 99%

“…This study was prompted by the results of δ 13 C and δ 18 O analysis on archaeological samples of the marine bivalve Spisula sachalinensis – a large and long‐lived bivalve found in the northwest Pacific. 20 Results were obtained from a resin‐embedded specimen which had been sampled using a computer‐operated New Wave Research MicroMill. δ 18 O values show a seasonal annual temperature curve as expected, but the δ 13 C record of two of the seven shells showed regions where the values were significantly more positive than expected (up to ~5‰).…”

Section: Introductionmentioning

confidence: 99%

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Micromilling vs hand drilling in stable isotope analyses of incremental carbonates: The potential for δ¹³C contamination by embedding resin

Branscombe

Lee‐Thorp

Leng

2022

Rapid Comm Mass Spectrometry

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Rationale Embedding resins are commonly used to facilitate high‐resolution sampling for stable isotope analysis but anomalous δ13C values have been observed in some cases. Here we compare the results of microsampling strategies for hand‐drilled versus resin‐embedded micromilled samples from the same marine shells to assess whether resin contamination is implicated in δ13C spikes. The comparison allows assessment of the relative benefits for spatial resolution, seasonal range for both δ18O and δ13C, and sample failure rates. Methods Hand‐drilled samples were obtained from two bivalve shells (Spisula sachalinensis), corresponding to micromilled samples on the same shells where high δ13C spikes were observed. All carbonate powders were analysed using a dual‐inlet Isoprime mass spectrometer and Multiprep device. Results from both sample sets were compared statistically. Results No anomalous high δ13C values and no failures due to insufficient gas were observed in the hand‐drilled samples in contrast to the embedded micromilled sequences. Spatial resolution was reduced (~2.5×) in the former compared with the latter, resulting in a small reduction in the total range observed in the micromilled δ13C and δ18O values. Reduced sampling resolution between the two datasets was only significant for δ18O. Conclusions For S. sachalinensis (as with other similar bivalves), rapid growth mitigates the reduced sampling resolution of hand drilling and does not significantly impact observed isotopic range and seasonal patterning. Occurrence of anomalous δ13C values were eliminated and failure rates due to insufficient sample size greatly reduced in the hand‐drilled dataset. We can find no other explanation for the occurrence of δ13C spikes than contamination by the embedding agent. We conclude that the logistical and interpretational benefits of careful hand drilling may be preferable to resin embedding for micromilling in marine shells, corals or speleothems where growth rate is rapid and the highest resolution is not required.

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Section: Resultsmentioning

confidence: 79%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Micromilling vs hand drilling in stable isotope analyses of incremental carbonates: The potential for δ¹³C contamination by embedding resin

Branscombe

Lee‐Thorp

Leng

2022

Rapid Comm Mass Spectrometry

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Projecting expected growth period of bivalves in a coastal temperate sea

Zemunik Selak,

Denamiel,

Peharda

et al. 2024

Limnol Oceanogr Letters

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The impact of climate warming on coastal benthic fauna is already observed, but forecasting their long‐term fate remains challenging. This study uses δ18Oshell data of specimens of five bivalve species collected at six locations and results from kilometer‐scale atmosphere–ocean climate model for the time intervals of 1987–2017 and 2070–2100, to estimate changes in bivalve growth phenology. All species will benefit from climate warming during winter, experiencing a longer growing season than currently. The growth of Aequipecten opercularis, Flexopecten glaber, and Pecten jacobaeus will decrease in summer, resulting in up to 3 months of reduced growth per year. Glycymeris pilosa and Venus verrucosa in the southern Adriatic Sea will be more affected than those in the north, with up to 4 months longer annual growth. These findings can inform adaptation plans for bivalve management in the Adriatic Sea but also in areas where the studied species are present.

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Marine resource exploitation and human settlement patterns during the Neolithic in SW Europe: stable oxygen isotope analyses (δ18O) on Phorcus lineatus (da Costa, 1778) from Campo de Hockey (San Fernando, Cádiz, Spain)

García-Escárzaga,

Cantillo-Duarte,

Milano

et al. 2024

Archaeol Anthropol Sci

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In recent decades, investigations in the southern Iberian Peninsula have increased our understanding of the socio-economic impact of the spread of the Neolithic in southwestern Europe, including changes in marine resources exploitation. Nevertheless, considerable uncertainty still exists around the seasonality of such subsistence systems and the putative role of marine fish and shellfish to the evolving agro-pastoral economies. Earlier studies on the European Atlantic coast (including Iberia) have shown that the stable oxygen isotope (δ18O) values from the topshell Phorcus lineatus (da Costa, 1778) can be reliably used to derive seasonal sea surface temperatures (SST) during its lifespan. This information can be used by archaeologists to estimate the seasonality of mollusc collection in the past, and to shed light into settlement and subsistence patterns. This paper presents the results of a stable isotope study on archaeological shells of P. lineatus recovered from the Neolithic settlement of Campo de Hockey (Cádiz, Spain). We analysed shells from both funerary and residential contexts and found that P. lineatus was consumed year-round, but with a stronger preference during winter. Our results therefore contribute to advance our understanding of the role of coastal environments in early farming societies of southwestern Europe.

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The potential of marine bivalve Spisula sachalinensis as a marine temperature record

Cited by 4 publications

References 55 publications

Micromilling vs hand drilling in stable isotope analyses of incremental carbonates: The potential for δ¹³C contamination by embedding resin

Micromilling vs hand drilling in stable isotope analyses of incremental carbonates: The potential for δ¹³C contamination by embedding resin

Projecting expected growth period of bivalves in a coastal temperate sea

Marine resource exploitation and human settlement patterns during the Neolithic in SW Europe: stable oxygen isotope analyses (δ18O) on Phorcus lineatus (da Costa, 1778) from Campo de Hockey (San Fernando, Cádiz, Spain)

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The potential of marine bivalve Spisula sachalinensis as a marine temperature record

Cited by 4 publications

References 55 publications

Micromilling vs hand drilling in stable isotope analyses of incremental carbonates: The potential for δ13C contamination by embedding resin

Micromilling vs hand drilling in stable isotope analyses of incremental carbonates: The potential for δ13C contamination by embedding resin

Projecting expected growth period of bivalves in a coastal temperate sea

Marine resource exploitation and human settlement patterns during the Neolithic in SW Europe: stable oxygen isotope analyses (δ18O) on Phorcus lineatus (da Costa, 1778) from Campo de Hockey (San Fernando, Cádiz, Spain)

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Micromilling vs hand drilling in stable isotope analyses of incremental carbonates: The potential for δ¹³C contamination by embedding resin

Micromilling vs hand drilling in stable isotope analyses of incremental carbonates: The potential for δ¹³C contamination by embedding resin