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Manganelli, G.
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Manganelli, G.
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- PublicationRestrictedStable isotope composition of Late Pleistocene-Holocene Eobania vermiculata (Müller, 1774) (Pulmonata, Stylommatophora) shells from the Central Mediterranean basin: Data from Grotta d’Oriente (Favignana, Sicily)(2011-11-01)
; ; ; ; ; ; ; ; ;Colonese, A. C.; Departamento de Arqueología y Antropología (IMF - CSIC), Laboratori d’Arqueozoologia (UAB), Research group: GASA (UAB), AGREST (Generalitat de Catalunya), Barcelona, Spain ;Zanchetta, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Drysdale, R. N.; Department of Resource Management and Geography, University of Melbourne, Australia ;Fallick, A. E.; Scottish Universities Environmental Research Centre, Glasgow, UK ;Manganelli, G.; Dipartimento di Scienze Ambientali, Università di Siena, Siena, Italy ;Lo Vetro, D.; Dipartimento di Scienze dell’Antichità “G. Pasquali”, Università degli Studi di Firenze, Firenze, Italy ;Martini, F.; Dipartimento di Scienze dell’Antichità “G. Pasquali”, Università degli Studi di Firenze, Firenze, Italy ;Di Giuseppe, Z.; Dipartimento di Scienze dell’Antichità “G. Pasquali”, Università degli Studi di Firenze, Firenze, Italy; ; ; ; ; ; ; This paper presents stable isotopic results (oxygen and carbon) from both modern and Late Pleistocene-Holocene shells of the land snail Eobania vermiculata (Müller, 1774) from Favignana Island (Sicily). It aims to contribute to the understanding of climate and vegetation history of this region during formation of Upper Palaeolithic, Mesolithic and Meso-Neolithic deposits of Grotta d’Oriente (ORT). Results from both an evaporative model (FBM) and an empirical regional isotopic model (i.e. linear relation between oxygen isotopic composition of shells (δ18Os) and those of local precipitation (δ18Op)) indicate that the δ18Os values of modern specimens are mainly controlled by local temperature, relative humidity and δ18Op at the time of snail activity. Data also suggest that the modern snails are nocturnally active almost all-year round in the study area. The carbon isotopic compositions of shells (δ13Cs) of the same specimens indicate a diet prevalently (or exclusively) composed of C3 vegetation. The δ18Os values of Late Pleistocene specimens suggest that climate conditions at ∼14.2 ka cal BP were similar to the present day, in agreement with additional δ18Os records from southern Italy. By contrast, early-middle Holocene shells are notably 18O-depleted and suggest wetter conditions, possibly combined with a decrease in isotopic composition of precipitation source, compared to the present day. When compared with regional palaeoclimatic records a large-scale isotopic response to millennial-scale changes in atmospheric and hydrological conditions (e.g. enhanced rainfall) in the central-eastern Mediterranean is observed during the early-middle Holocene. The δ13Cs of Late Pleistocene and Holocene specimens are consistently higher than those of modern ones. For the Late Pleistocene, this could be reasonably explained in terms of water-stressed vegetation. On the other hand, this seems to be less valid for Holocene counterparts when the climate was wetter. Probably δ13Cs values result from the combination of distinct competing factors, involving atmospheric CO2 concentration, seasonal water budget, vegetation type-cover and other carbon sources. Results reveal coherent relationships between regional δ18Os and δ13Cs, demonstrating that Late Pleistocene-Holocene land snail shell remains from archaeological sites may provide useful snapshots of past seasonal climate conditions.440 22 - PublicationRestrictedEarly-middle Holocene land snail shell stable isotope record from Grotta di Latronico 3 (southern Italy)(2010-12)
; ; ; ; ; ; ; ;Colonese, A. C.; Departamento de Arqueologı´a y Antropologı´a (IMF – CSIC), Research group GASA (UAB), AGREST (Generalitat de Catalunya), Barcelona, Spain ;Zanchetta, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Dotsika, E.; Institute of Material Science, National Center for Scientific Research, Aghia Paraskevi, Attiki, Greece ;Drysdale, R. N.; Department of Resource Management and Geography, University of Melbourne, Victoria, Australia ;Fallick, A. E.; Scottish Universities Environmental Research Centre, East Kilbride, Glasgow, UK ;Grifoni Cremonesi, R.; Dipartimento di Scienze Archeologiche, University of Pisa, Pisa, Italy ;Manganelli, G.; Dipartimento di Scienze Ambientali, University of Siena, Siena, Italy; ; ; ; ; ; This paper compares stable isotope (δ18O and δ13C) records of early–middle Holocene land snail shells from the archaeological deposits of Grotta di Latronico 3 (LTR3; southern Italy) with modern shell isotopic data. No substantial interspecific variability was observed in shell δ18O (δ18Os) of modern specimens (Pomatias elegans, Cornu aspersum, Eobania vermiculata, Helix ligata and Marmorana fuscolabiata). In contrast, interspecific shell δ13C (δ13Cs) variability was significant, probably due to different feeding behaviour among species. The δ18Os values of living land snails suggest that species hibernate for a long period during colder months, so that the signal of 18O-depleted winter rainfall in their δ18Os is lost. This suggests that δ18Os and δ13Cs values of Pomatias elegans from this archaeological succession provide valuable clues for seasonal (spring–autumn) climatic conditions during the early–middle Holocene. The δ18Os values of fossil specimens are significantly lower than in modern shells and in agreement with other palaeoclimatic records, suggesting a substantial increase of precipitation and/or persistent changes in air mass source trajectories over this region between ca. 8.8 cal ka BP and 6.2–6.7 ka ago. The δ13Cs trend suggests a transition from a slightly 13C-enriched to a 13C-depleted diet between early and middle Holocene compared to present conditions. We postulate that this δ13Cs trend might reflect changes in the C3 vegetation community, potentially combined with other environmental factors such as regional moisture increase and the progressive decrease of atmospheric CO2 concentration. Copyright © 2010 John Wiley & Sons, Ltd.183 24