Pollen-based reconstruction of Holocene vegetation and climate in southern Italy: the case of Lago Trifoglietti
| Autor: | Sébastien Joannin, Boris Vannière, Odile Peyron, Elisabetha Brugiapaglia, Michel Magny, Liliana Bernardo, Simon Goring, J.-L. de Beaulieu |
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| Přispěvatelé: | Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi del Molise, Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Università della Calabria [Arcavacata di Rende] (Unical), Dpt of Geography, University of Wisconsin-Madison, ANR-07-BLAN-0009,LAMA,Holocene changes in environment and climate, and history of human societies in Central Mediterranean as reflected by LAke and MArine records(2007), Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Institut méditerranéen de biodiversité et d'écologie marine et continentale ( IMBE ), Université d'Avignon et des Pays de Vaucluse ( UAPV ) -Aix Marseille Université ( AMU ) -Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique ( CNRS ), Università della Calabria [Arcavacata di Rende] ( Unical ), University of Wisconsin-Madison [Madison], ANR-07-BLAN-0009,LAMA,Holocene changes in environment and climate, and history of human societies in Central Mediterranean as reflected by LAke and MArine records ( 2007 ), Laboratoire Chrono-environnement (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Università degli Studi del Molise = University of Molise (UNIMOL) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010506 paleontology
010504 meteorology & atmospheric sciences Stratigraphy lcsh:Environmental protection [SDE.MCG]Environmental Sciences/Global Changes Climate change medicine.disease_cause 01 natural sciences law.invention pollen palaeoclimatic reconstruction holocene vegetation Altitude lcsh:Environmental pollution law Pollen medicine lcsh:TD169-171.8 Radiocarbon dating Holocene lcsh:Environmental sciences 0105 earth and related environmental sciences lcsh:GE1-350 Global and Planetary Change Paleontology Vegetation 15. Life on land [ SDE.MCG ] Environmental Sciences/Global Changes Boreal 13. Climate action [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Climatology lcsh:TD172-193.5 [ SDU.STU.CL ] Sciences of the Universe [physics]/Earth Sciences/Climatology Geology Chronology |
| Zdroj: | Climate of the Past Climate of the Past, European Geosciences Union (EGU), 2012, 8 (6), pp.1973-1996. ⟨10.5194/cp-8-1973-2012⟩ Climate of the Past, European Geosciences Union (EGU), 2012, 8 (6), pp.1973-1996. 〈10.5194/cp-8-1973-2012〉 Climate of the Past, Vol 8, Iss 6, Pp 1973-1996 (2012) Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2012, Vol. 8, N. 6, P. 1973-1996 Climate of the Past, 2012, 8 (6), pp.1973-1996. ⟨10.5194/cp-8-1973-2012⟩ |
| ISSN: | 1814-9332 1814-9324 |
| Popis: | A high-resolution pollen record from Lago Trifoglietti in Calabria (southern Italy) provides new insights into the paleoenvironmental and palaeoclimatic changes which characterise the Holocene period in the southern Italy. The chronology is based on 11 AMS radiocarbon dates from terrestrial organic material. The Holocene history of the vegetation cover shows the persistence of an important and relatively stable Fagus forest present over that entire period, offering a rare example of a beech woodstand able to withstand climate changes for more than 11 000 yr. Probably in relation with early Holocene dry climate conditions which affected southern Italy, the Trifoglietti pollen record supports a southward delay in thermophyllous forest expansion dated to ca. 13 500 cal BP at Monticchio, ca. 11 000 cal BP at Trifoglietti, and finally ca. 9800 cal BP in Sicily. Regarding the human impact history, the Trifoglietti pollen record shows only poor imprints of agricultural activities and anthopogenic indicators, apart from those indicating pastoralism activities beneath forest cover. The selective exploitation of Abies appears to have been the strongest human impact on the Trifoglietti surroundings. On the basis of (1) a specific ratio between hygrophilous and terrestrial taxa, and (2) the Modern Analogue Technique, the pollen data collected at Lago Trifoglietti led to the establishment of two palaeoclimatic records tracing changes in (1) lake depth and (2) annual precipitation. On a millennial scale, these records give evidence of increasing moisture from ca. 11 000 to ca. 9400 cal BP and maximum humidity from ca. 9400 to ca. 6200 cal BP, prior to a general trend towards the drier climate conditions that have prevailed up to the present. In addition, several successive centennial-scale oscillations appear to have punctuated the entire Holocene. The identification of a cold dry event around 11 300 cal BP, responsible for a marked decline in timberline altitude and possibly equivalent to the PBO, remains to be confirmed by further investigations verifying both chronology and magnitude. Two cold and possibly drier Boreal oscillations developed at ca. 9800 and 9200 cal BP. At Trifoglietti, the 8.2 kyr event corresponds to the onset of cooler and drier climatic conditions which persisted until ca. 7500 cal BP. Finally, the second half of the Holocene was characterised by dry phases at ca. 6100–5200, 4400–3500, and 2500–1800 cal BP, alternating with more humid phases at ca. 5200–4400 and ca. 3500–2500 cal BP. Considered as a whole, these millennial-scale trends and centennial-scale climatic oscillations support contrasting patterns of palaeohydrological changes recognised between the north- and south-central Mediterranean. |
| Databáze: | OpenAIRE |
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