Calibration of the oxygen isotope ratios of the gastropods Patella candei crenata and Phorcus atratus as high-resolution paleothermometers from the subtropical eastern Atlantic Ocean

Parker, Wesley G.; Yanes, Yurena; Surge, Donna; Mesa-Hernández, Eduardo

doi:10.1016/j.palaeo.2017.09.006

Cited by 22 publications

(32 citation statements)

References 68 publications

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“…We have identified Patella caerulea as an ideal species to assess elemental variations through LIBS. This species and others within the genus Patella have been calibrated as paleotemperature archives using δ 18 O values and have been used to assess the utility of Mg/Ca ratios as another temperature proxy 21,22 in addition to their function as δ 18 O record 30–33 . P .…”

Section: Resultsmentioning

confidence: 99%

Extensive elemental mapping unlocks Mg/Ca ratios as climate proxy in seasonal records of Mediterranean limpets

Hausmann

Prendergast

Lemonis

et al. 2019

Sci Rep

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Elemental analysis of biogeochemical archives is an established technique used to study climate in a range of applications, including ocean circulation, glacial/interglacial climates, and anthropogenic climate change. Data from mollusc archives are especially important because of their global abundance and sub-annual resolution. Despite this potential, they are underrepresented among palaeoclimate studies, due to enigmatic physiological influences skewing the elemental record. Understanding the patterns behind these influences will improve data interpretation and lead to the development of new climate proxies. Here, we show for the first time that extensive spatial mapping of multiple mollusc specimens using Laser Induced Breakdown Spectroscopy (LIBS) across a wider region can resolve enigmatic patterns within the elemental record caused by physiological influences. 2D elemental (Mg/Ca) maps of whole limpet shells (Patella caerulea) from across the Mediterranean revealed patterns of variability within individual mollusc records as well as within isochronous parts of specimens. By registering and quantifying these patterns, we established previously uninterpretable correlations with temperature (R 2 > 0.8, p < 0.01). This outcome redefines the possibilities of accessing sub-annual climate proxies and presents the means to assess annual temperature ranges using oxygen isotope analysis requiring only 2 samples per shell.

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Section: Resultsmentioning

confidence: 99%

Extensive elemental mapping unlocks Mg/Ca ratios as climate proxy in seasonal records of Mediterranean limpets

Hausmann

Prendergast

Lemonis

et al. 2019

Sci Rep

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“…Several studies conducted in the Mediterranean and elsewhere have demonstrated that Phorcus turbinatus (Bosch et al, in press; Colonese et al, 2009; Mannino et al, 2007, 2008, 2011; Prendergast et al,2013, 2016; Shackleton, 1974) and other species of Phorcus (Gutiérrez-Zugasti et al, 2015; Mannino et al, 2003; Parker et al, 2017) are reliable high-resolution paleoclimatic archives. The shell of Phorcus turbinatus is formed by an outer prismatic aragonitic layer and an inner nacreous aragonitic layer (Milano et al, 2016), the latter with marked cyclic growth increments.…”

Section: Methodsmentioning

confidence: 99%

“…The δ 18 O values of archeological mollusk shells have fruitfully been used to reconstruct prehistoric climates and identify season of shellfish collection since the 1970s (Schifano, 1983; Schifano and Censi, 1983; Shackleton, 1973, 1974). Published work using living and ancient specimens of the species Phorcus turbinatus and other Phorcus species has recurrently demonstrated that this taxon precipitates its shell in isotopic equilibrium with host waters, and accordingly, the δ 18 O values extracted from pristine inner aragonitic layers of their shells primarily reflect the sea surface temperature (SST) during calcification when water δ 18 O values can be assumed or inferred independently (Bosch et al, in press; Colonese et al, 2009; Mannino et al,2007, 2008; Milano et al, 2016; Parker et al, 2017; Prendergast et al, 2013; Prendergast et al, 2016). The extensive and well-preserved accumulations of harvested Phorcus turbinatus by Epipaleolithic and early Neolithic people from NE Morocco offer an excellent opportunity to evaluate local variations in SSTs during this relevant cultural period in the human history of NW Africa.…”

Section: Introductionmentioning

confidence: 99%

On the transition from hunting-gathering to food production in NE Morocco as inferred from archeological Phorcus turbinatus shells

2018

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Processes behind the shift from hunting-gathering to food production lifestyle are multifaceted and not yet completely understood. The Mediterranean coast of NW Africa provides an eclectic transitional pattern, namely, a very hesitant transition to food production. The distribution and abundance of early Neolithic domesticated species is disparate and region specific. Climate and environmental change have been often considered as an important influencing factor for this transition. This hypothesis was tested using archeological shells of the rocky intertidal gastropod Phorcus turbinatus recovered from the Ifri Oudadane site in NE Morocco. The oxygen isotope composition (δ18O) of the shell was used to examine whether the hesitant transition to food production was linked to a local climate shift in the Mediterranean Maghreb. Intrashell δ18O values suggest a marked temperature increase from >7.6 to ~7.0 cal. ka BP, the time when Neolithic innovations first appear on site. An additional increase in temperature from ~7.0 to <6.8 cal. ka BP matches with the beginning of the main occupation phase and the doubtless breakthrough of cultivation at Ifri Oudadane. This apparent warming trend, although considered preliminary, seems to match well with warming tendency observed in several published regional climate proxies. Therefore, a temperature shift may have played a role in the timing and implementation of food production in the area. Last growth episode δ18O values suggest that shellfish were harvested throughout most of the year, with noticeable intensification during the cooler half of the year. This preliminary pattern was fairly consistent throughout the Epipaleolithic and early Neolithic phases, pointing to a probable near year-round site occupation rather than a single season settlement. Future research on Ifri Oudadane and other NW African archeological records are much needed to assess whether these patterns persist in Morocco and other Epipaleolithic and early Neolithic settlements in the western Mediterranean Maghreb.

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“…1 , S5 ). Seasonal δ 18 O variations have also been observed in marine 18 , 30 and freshwater 19 gastropods, reflecting temperature variations during their growth. The line of monitoring results and modern δ 18 O snail data suggests that fossil snails living in deep water such as Type A settings and in very shallow water such as Type B settings can be analyzed to reconstruct annual mean values in air temperature and both annual mean and seasonal variations, respectively.…”

Section: Resultsmentioning

confidence: 94%

Last glacial temperature reconstructions using coupled isotopic analyses of fossil snails and stalagmites from archaeological caves in Okinawa, Japan

Asami

Hondo

Uemura

et al. 2021

Sci Rep

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We applied a new geoarchaeological method with two carbonate archives, which are fossil snails from Sakitari Cave and stalagmites from Gyokusen Cave, on Okinawa Island, Japan, to reconstruct surface air temperature changes over the northwestern Pacific since the last glacial period. Oxygen isotope ratios (δ18O) of modern and fossil freshwater snail shells were determined to infer seasonal temperature variations. The observational and analytical data confirm that δ18O values of fluid inclusion waters in the stalagmite can be regarded as those of spring waters at the sites where snails lived. Our results indicate that the annual mean, summer, and winter air temperatures were lower by 6–7 °C at ca. 23 thousand years ago (ka) and 4–5 °C at ca. 16–13 ka than those of the present day. Our reconstruction implies that surface air cooling was possibly two times greater than that of seawater around the Ryukyu Islands during the Last Glacial Maximum, which potentially enhanced the development of the East Asian summer monsoon during the last deglaciation. Considering the potential uncertainties in the temperature estimations, the climatic interpretations of this study are not necessarily definitive due to the limited number of samples. Nevertheless, our new geoarchaeological approach using coupled δ18O determinations of fossil snails and stalagmite fluid inclusion waters will be useful for reconstructing snapshots of seasonally resolved time series of air temperatures during the Quaternary.

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Calibration of the oxygen isotope ratios of the gastropods Patella candei crenata and Phorcus atratus as high-resolution paleothermometers from the subtropical eastern Atlantic Ocean

Cited by 22 publications

References 68 publications

Extensive elemental mapping unlocks Mg/Ca ratios as climate proxy in seasonal records of Mediterranean limpets

Extensive elemental mapping unlocks Mg/Ca ratios as climate proxy in seasonal records of Mediterranean limpets

On the transition from hunting-gathering to food production in NE Morocco as inferred from archeological Phorcus turbinatus shells

Last glacial temperature reconstructions using coupled isotopic analyses of fossil snails and stalagmites from archaeological caves in Okinawa, Japan

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