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A 7000-year record of environmental change, including early farming impact, based on lake-sediment geochemistry and pollen data from County Sligo, western Ireland

Published online by Cambridge University Press:  20 January 2017

Michael O'Connell ,
Beatrice Ghilardi  and
Liam Morrison
Michael O'Connell*
Affiliation:
Palaeoenvironmental Research Unit, School of Geography and Archaeology, National University of Ireland Galway, Galway, Ireland
Beatrice Ghilardi
Affiliation:
Palaeoenvironmental Research Unit, School of Geography and Archaeology, National University of Ireland Galway, Galway, Ireland
Liam Morrison
Affiliation:
Earth and Ocean Sciences, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
*
*Corresponding author. E-mail addresses:michael.oconnell@nuigalway.ie (M. O'Connell),ghilardibeatrice@gmail.com (B. Ghilardi),liam.morrison@nuigalway.ie (L. Morrison).
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Abstract

Detailed, chronologically tightly constrained, lake-sediment-based geochemical and pollen records have enabled local changes in soil erosion, woodland cover and composition, and prehistoric farming impact to be reconstructed in considerable detail. The profile opens shortly after 7800 BC when tall canopy trees were well-established and presumably in equilibrium with their environment. A distinct perturbation that involved an increase in pine and birch, a decrease in oak and a minor opening-up of the woodland is regarded as the local expression of the 8.2 ka climate anomaly. Lack of response in the geochemical erosional indicators is interpreted as evidence for drier conditions. A short-lived, over-compensation in climate recovery followed the 8.2 ka event. Neolithic farming impact is clearly expressed in both the pollen and geochemical data. Both datasets indicate that Neolithic impact was concentrated in the early Neolithic (3715–3440 BC). In the interval 3000–2700 BC there appears to have been a break in farming activity. The pollen data suggest substantially increased farming impact (both arable and pastoral) in the Bronze Age, with maximum farming and woodland clearances taking place in the late Bronze Age (1155–935 BC). These developments are poorly expressed in the geochemical record, possibly due to within-lake changes.

Keywords

GeochemistryPollen analysisPaleoecologyHuman impactClimate changeNeolithicBronze AgeIreland
Type
Research Article
Information
Quaternary Research , Volume 81 , Issue 1 , January 2014 , pp. 35 - 49
Copyright
University of Washington

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References

Allott, N.A. Temperature, oxygen and heat-budgets of six small western Irish lakes. Freshwater Biology 16, (1986). 145–154.Google Scholar
Bennett, K.D. Manual for psimpoll and pscomb. Available at: http://www.chrono.qub.ac.uk/psimpoll/psimpoll_manual/4.27/psman4.htm#format (2007). (accessed 10.01.2012) Google Scholar
Bergh, S. Landscape of the monuments. A study of the passage tombs of the Cúil Irra region, Co. Sligo, Ireland. Arkeologiska Undersökningar 6, (1995). 1–256.Google Scholar
Bergh, S. Knocknarea: the ultimate monument. Megaliths and mountains in Neolithic Cúil Irra, north-west Ireland. Scarre, C. Monuments and Landscape in Atlantic Europe. (2002). Routledge, London. 139–151.Google Scholar
Beug, H.-J. Leitfaden der Pollenbestimmung für Mitteleuropa und angrenzende Gebiete. Lieferung 1. (1961). Gustav Fischer, Stuttgart.Google Scholar
Beug, H.-J. Leitfaden der Pollenbestimmung für Mitteleuropa und angrenzende Gebiete. (2004). Pfeil, München.Google Scholar
Boyle, J.F. Inorganic geochemical methods in palaeolimnology. Last, W.M., and Smol, J.P. Tracking Environmental Change Using Lake Sediments. Physical and Geochemical Methods 2, (2001). Kluwer, Dordrecht. 83–141.Google Scholar
Burenhult, G. The archaeology of Carrowmore. Environmental archaeology and the megalithic tradition at Carrowmore, Co. Sligo, Ireland. Theses and Papers in North-European Archaeology 14, (1984). G. Burenhult Förlag, Stockholm.Google Scholar
Burenhult, G. The Illustrated Guide to the Megalithic Cemetery of Carrowmore Co. Sligo, Ireland. (2009). G. Burenholt, Tjörnarp.Google Scholar
Caulfield, S. The Neolithic settlement of North Connaught. Reeves-Smyth, T., and Hamond, F. Landscape Archaeology in Ireland. BAR British Ser. 116, (1983). British Archaeological Reports, Oxford. 195–215.Google Scholar
Collard, M., Edinborough, K., Shennan, S., and Thomas, M.G. Radiocarbon evidence indicates that migrants introduced farming to Britain. Journal of Archaeological Science 37, (2010). 866–870.CrossRefGoogle Scholar
Condit, T., and Gibbons, M. A glimpse of Sligo's prehistory. Archaeology Ireland 5, 3 (1991). 7–10.Google Scholar
Cooney, G., Bayliss, A., Healy, F., Whittle, A., Danaher, E., Cayney, L., Mallory, J., Smyth, J., Kador, T., and O'Sullivan, M. Ireland. Whittle, A., Healy, F., and Bayliss, A. Dating the Early Neolithic Enclosures of Southern Britain and Ireland. Gathering Time vol. 2, (2011). Oxbow Books, Oxford. 562–669.Google Scholar
Danaher, E. Monumental Beginnings. The Archaeology of the N4 Sligo Inner Relief Road. (2007). Wordwell, Bray.Google Scholar
Egan, U., Byrne, E., Sleeman, M., Ronan, S., and Murphy, C. Archaeological Inventory of County Sligo. Vol. 1. South Sligo. (2005). Stationery Office, Dublin.Google Scholar
Ellenberg, H. Vegetation Mitteleuropas mit den Alpen in ökologischer, dynamischer und historischer Sicht. (1996). Ulmer, Stuttgart.Google Scholar
Engstrom, D.R., and Wright, H.E. Chemical stratigraphy of lake sediments as a record of environmental change. Haworth, E.Y., and Lund, J.W.G. Lake Sediments and Environmental History. (1984). Leicester University Press, Leicester. 11–67.Google Scholar
Fægri, K., and Iversen, J. Textbook of Pollen Analysis by Fægri, K., Kaland, P.E., Krzywinski, K. (1989). Wiley, New York.Google Scholar
Fyfe, R.M. Bronze Age landscape dynamics: spatially detailed pollen analysis from a ceremonial complex. Journal of Archaeological Science 39, (2012). 2764–2773.Google Scholar
Gaillard, M.J., Sugita, S., Bunting, M.J., Middleton, R., Brostrom, A., Caseldine, C., Giesecke, T., Hellman, S.E.V., Hicks, S., Hjelle, K., Langdon, C., Nielsen, A.B., Poska, A., von Stedingk, H., Veski, S., POLLANDCAL members, The use of modelling and simulation approach in reconstructing past landscapes from fossil pollen data: a review and results from the POLLANDCAL network. Vegetation History and Archaeobotany 17, (2008). 419–443.CrossRefGoogle Scholar
Ghilardi, B., and O'Connell, M. Early Holocene vegetation and climate dynamics with particular reference to the 8.2 ka event: pollen and macrofossil evidence from a small lake in western Ireland. Vegetation History and Archaeobotany 22, (2013). 99–114.Google Scholar
Ghilardi, B., and O'Connell, M. Fine-resolution pollen-analytical study of Holocene woodland dynamics and land use in north Sligo, Ireland. Boreas 42, (2013). 623–649.Google Scholar
Ghilardi, B., and O'Connell, M. Prehistoric farming at Lough Dargan, north Sligo and its impact on the terrestrial environment. Timoney, M.A. Dedicated to Sligo. Thirty-four Essays on Sligo's Past. (2013). Publishing Sligo's Past, Keash (Co. Sligo). 15–28.Google Scholar
Grimm, E.C. CONISS: a FORTRAN 77 program for stratigraphically constrained cluster analysis by the method of incremental sum of squares. Computers & Geosciences 13, (1987). 13–35.CrossRefGoogle Scholar
Hede, M.U., Rasmussen, P., Noe-Nygaard, N., Clarke, A.L., Vinebrooke, R.D., and Olsen, J. Multiproxy evidence for terrestrial and aquatic ecosystem responses during the 8.2 ka cold event as recorded at Højby Sø, Denmark. Quaternary Research 73, (2010). 485–496.CrossRefGoogle Scholar
Heiri, O., Lotter, A.F., and Lemcke, G. Loss on ignition as a method for estimating organic and carbonate content in sediments: reproducibility and comparability of results. Journal of Paleolimnology 25, (2001). 101–110.Google Scholar
Hensey, R., and Bergh, S. The inns at Sligo are better than those at Auray and the scenery far more beautiful: Carrowmore re-visited. Timoney, M.A. Dedicated to Sligo. Thirty-four Essays on Sligo's Past. (2013). Publishing Sligo's Past, Keash (Co. Sligo). 41–43.Google Scholar
Hirons, K.R., and Thompson, R. Palaeoenvironmental application of magnetic measurements from inter-drumlin hollow lake sediments near Dungannon, Co, Tyrone, Northern Ireland. Boreas 15, (1986). 117–135.CrossRefGoogle Scholar
Jarvis, I.J., and Jarvis, K. Rare earth element geochemistry of standard sediments: a study using inductively couples plasma spectrometry. Chemical Geology 53, (1985). 335–344.CrossRefGoogle Scholar
Kamenov, G.D., Brenner, M., and Tucker, J.L. Anthropogenic versus natural control on trace element and Sr–Nd–Pb isotope stratigraphy in peat sediments of southeast Florida (USA), 1500 AD to present. Geochimica et Cosmochimica Acta 73, (2009). 3549–3567.Google Scholar
Kilfeather, A. Lough Kinale: the archaeology of the hinterland. Fredengren, C., Kilfeather, A., and Stuijts, I. Lough Kinale: Studies of an Irish Lake. (2010). Wordwell, Dublin. 89–127.Google Scholar
MacDermot, C.V., Long, C.B., Harney, S.J., (1996). Geology of Sligo-Leitrim. A Geological Description of Sligo, Leitrim, and Adjoining Parts of Cavan, Fermanagh, Mayo and Roscommon, to Accompany the Bedrock Geology 1:100,000 Scale Map Series, Sheet 7, Sligo-Leitrim. Geological Survey of Ireland, Dublin.Google Scholar
Mackereth, F.J.H. Some chemical observations on post-glacial lake sediments. Philosophical Transactions of the Royal Society of London 250B, (1966). 165–213.Google Scholar
McClatchie, M., Bogaard, A., Colledge, S., Whitehouse, N.J., Schulting, R.J., Barratt, P., and McLaughlin, T.R. Neolithic farming in north-western Europe: archaeobotanical evidence from Ireland. Journal of Archaeological Science (2012). http://dx.doi.org/10.1016/j.jas.2012.10.022Google Scholar
McCune, B., and Mefford, M.J. PC-ORD. Multivariate Analysis of Ecological Data. Version 6. (2011). MjM Software, Gleneden Beach (Oregon, USA). (28 pp.)Google Scholar
McSparron, C. Have you no homes to go to?. Archaeology Ireland 22, 3 (2008). 18–21.Google Scholar
Mighall, T., Timpany, S., Blackford, J.J., Innes, J.B., O'Brien, C.E., O'Brien, W., and Harrison, S. Vegetation change during the Mesolithic and Neolithic on the Mizen Peninsula, Co. Cork, south-west Ireland. Vegetation History and Archaeobotany 17, (2008). 617–628.Google Scholar
Mingram, J., Negendank, J.F.W., Brauer, A., Berger, D., Hendrich, A., Kohler, M., and Usinger, H. Long cores from small lakes — recovering up to 100 m-long lake sediment sequences with a high-precision rod-operated piston corer (Usinger-corer). Journal of Paleolimnology 37, (2007). 517–528.CrossRefGoogle Scholar
Mitchell, G.F. Post-Boreal pollen-diagrams from Irish raised-bogs. Proceedings of the Royal Irish Academy 57B, (1956). 185–251.Google Scholar
Mitchell, F.J.G., and Cooney, T. Vegetation history in the Killarney valley. O'Brien, W. Ross Island. Mining, Metal and Society in Early Ireland (Bronze Age Studies 6). (2004). Department of Archaeology, National University of Ireland Galway, Galway. 481–493.Google Scholar
Molloy, K. Holocene vegetation and land-use history at Mooghaun, south-east Clare, with particular reference to the Bronze Age. Grogan, E. The Later Prehistoric Landscape of South-East Clare. Discovery Programme Monographs 6. The North Munster Project vol. 1, (2005). Wordwell, Bray. 255–301.Google Scholar
Molloy, K., and O'Connell, M. Palaeoecological investigations towards the reconstruction of environment and land-use changes during prehistory at Céide Fields, western Ireland. Probleme der Küstenforschung im südlichen Nordseegebiet 23, (1995). 187–225.Google Scholar
Molloy, K., and O'Connell, M. Holocene vegetation and land-use dynamics in the karstic environment of Inis Oírr, Aran Islands, western Ireland: pollen analytical evidence evaluated in the light of the archaeological record. Quaternary International 113, (2004). 41–61.Google Scholar
Molloy, K., and O'Connell, M. Prehistoric farming in western Ireland: pollen analysis at Caheraphuca, Co. Clare. Delaney, S., Bayley, D., Lyne, E., McNamara, S., Nunan, J., Molloy, K. NRA Scheme Monographs 9, (2012). National Roads Authority, Dublin. 109–122.Google Scholar
Moore, P.D., Webb, J.A., and Collinson, M.E. Pollen Analysis. (1991). Blackwell, London.Google Scholar
Morrison, L., Baumann, H.A., and Stengel, D.B. An assessment of metal contamination along the Irish coast using the seaweed Ascophyllum nodosum (Fucales, Phaeophyceae). Environmental Pollution 152, (2008). 293–303.Google Scholar
Murnaghan, S., Taylor, D., Jennings, E., Dalton, C., Olaya-Bosch, K., and O'Dwyer, B. Middle to late Holocene environmental changes in western Ireland inferred from fluctuations in preservation of biological variables in lake sediment. Journal of Paleolimnology 48, (2012). 433–448.CrossRefGoogle Scholar
Ó Nualláin, S. Survey of the Megalithic Tombs of Ireland. Vol. V: Sligo. (1989). Stationery Office, Dublin.Google Scholar
O'Connell, M. Origins of Irish lowland blanket bog. Doyle, G.J. Ecology and Conservation of Irish Peatlands. (1990). Royal Irish Academy, Dublin. 49–71.Google Scholar
O'Connell, M., and Molloy, K. Farming and woodland dynamics in Ireland during the Neolithic. Biology and Environment (Proceedings of the Royal Irish Academy Series B) 101, (2001). 99–128.Google Scholar
Overland, A., and O'Connell, M. Fine-spatial paleoecological investigations towards reconstructing late Holocene environmental change, landscape evolution and farming activity in Barrees, Beara Peninsula, southwestern Ireland. Journal of the North Atlantic 1, (2008). 37–73.CrossRefGoogle Scholar
Peck, J.E. Multivariate Analysis for Ecologists. (2010). MjM Software Design, Gleneden Beach (Oregon).Google Scholar
Plunkett, G. Land-use patterns and cultural change in the Middle to Late Bronze Age in Ireland: inferences from pollen records. Vegetation History and Archaeobotany 18, (2009). 273–295.Google Scholar
Ramsey, C.B. Deposition models for chronological records. Quaternary Science Reviews 27, (2008). 42–60.CrossRefGoogle Scholar
Ramsey, C.B. Bayesian analysis of radiocarbon dates. Radiocarbon 51, (2009). 337–360.Google Scholar
Reille, M. Pollen et Spores d'Europe et d'Afrique du Nord. Laboratoire de Botanique Historique et Palynologie. (1992). Faculté des Sciences et Techniques Saint-Jérôme, Marseille.Google Scholar
Reille, M. Pollen et Spores d'Europe et d'Afrique du Nord. Supplement 1. (1995). Laboratoire de Botanique Historique et Palynologie, Faculté des Sciences et Techniques Saint-Jérôme, Marseille.Google Scholar
Reimer, P.J., Baillie, M.G.L., Bard, E., Bayliss, A., Beck, J.W., Blackwell, P.G., Ramsey, C.B., Buck, C.E., Burr, G.S., Edwards, R.L., Friedrich, M., Grootes, P.M., Guilderson, T.P., Hajdas, I., Heaton, T.J., Hogg, A.G., Hughen, K.A., Kaiser, K.F., Kromer, B., McCormac, F.G., Manning, S.W., Reimer, R.W., Richards, D.A., Southon, J.R., Talamo, S., Turney, C.S.M., van der Plicht, J., and Weyhenmeye, C.E. IntCal09 and Marine09 radiocarbon age calibration curves, 0–50, 000 years cal BP. Radiocarbon 51, (2009). 1111–1150.Google Scholar
Rohling, E.J., and Pälike, H. Centennial-scale climate cooling with a sudden cold event around 8200 years ago. Nature 434, (2005). 975–979.Google Scholar
Schaller, T., Moor, C.H., and Wehrli, B. Sedimentary profiles of Fe, Mn, V, Cr, As and Mo as indicators of benthic redox conditions in Baldeggersee. Aquatic Science 59, (1997). 345–361.Google Scholar
Schettler, G., Romer, R.L., O'Connell, M., and Molloy, K. Holocene climatic variations and postglacial sea-level rise geochemically recorded in the sediments of the brackish karst lake An Loch Mór, western Ireland. Boreas 35, (2006). 674–692.Google Scholar
Schulting, R.J., Murphy, E., Jones, C., and Warren, G. New dates from the north and a proposed chronology for Irish court tombs. Proceedings of the Royal Irish Academy 112C, (2012). 1–60.Google Scholar
Selig, U., and Leipe, T. Stratigraphy on nutrients and metals in sediment profiles of two dimictic lakes in north-eastern Germany. Environmental Geology 55, (2008). 1099–1107.CrossRefGoogle Scholar
Smyth, J. Tides of change? The house through the Irish Neolithic. Hofmann, D., and Smyth, J. Tracking the Neolithic House in Europe. (2013). Springer, New York. 301–327.Google Scholar
Snäll, S., and Liljefors, T. Leachability of major elements from minerals in strong acids. Journal of Geochemical Exploration 71, (2000). 1–12.Google Scholar
Stevens, C.J., and Fuller, D.Q. Did Neolithic farming fail? The case for a Bronze Age agricultural revolution in the British Isles. Antiquity 86, (2012). 707–722.Google Scholar
Stolze, S., Dörfler, W., Monecke, T., and Nelle, O. Evidence for climatic variability and its impact on human development during the Neolithic from Loughmeenaghan, County Sligo, Ireland. Journal of Quaternary Science 27, (2012). 393–403.Google Scholar
Stolze, S., Muscheler, R., Dörfler, W., and Nelle, O. Solar influence on climate variability and human development during the Neolithic: evidence from a high-resolution multi-proxy record from Templevanny Lough, County Sligo, Ireland. Quaternary Science Reviews 67, (2013). 138–159.CrossRefGoogle Scholar
Stolze, S., Dörfler, W., and Nelle, O. A high-resolution palaeoecological reconstruction of landscape change and human development during the fourth millennium BC in the Carrowkeel/Keshcorran area, County Sligo. Timoney, M.A. Dedicated to Sligo. Thirty-four Essays on Sligo's Past. (2013). Publishing Sligo's Past, Keash (Co. Sligo). 29–36.Google Scholar
Sugita, S. Pollen representation of vegetation in Quaternary sediments: theory and method in patchy vegetation. Journal of Ecology 82, (1994). 881–897.Google Scholar
Tanaka, K., Akagawa, F., Yamamoto, K., Tani, Y., Kawabe, I., and Kawai, T. Rare earth element geochemistry of Lake Baikal sediment: its implication for geochemical response to climate change during the Last Glacial/Interglacial transition. Quaternary Science Reviews 26, (2007). 1362–1368.Google Scholar
Taylor, K.J., Potito, A.P., Beilman, D.W., Ghilardi, B., and O'Connell, M. Palaeolimnological impacts of early prehistoric farming at Lough Dargan, County Sligo, Ireland. Journal of Archaeological Science 40, (2013). 3212–3221.Google Scholar
van Geel, B., Coope, G.R., and van der Hammen, T. Palaeoecology and stratigraphy of the Lateglacial type section at Usselo (The Netherlands). Review of Palaeobotany and Palynology 60, (1989). 25–129.CrossRefGoogle Scholar
van Geel, B., Buurman, J., Brinkkemper, O., Schelvis, J., Aptroot, A., van Reenen, G., and Hakbijl, T. Environmental reconstruction of a Roman Period settlement site in Uitgeest (The Netherlands), with special reference to coprophilous fungi. Journal of Archaeological Science 30, (2003). 873–883.Google Scholar
Waddell, J. The Prehistoric Archaeology of Ireland. (2010). Wordwell, Bray.Google Scholar
Walker, M., Johnsen, S., Rasmussen, S.O., Popp, T., Steffensen, J.P., Gibbard, P., Hoek, W., Lowe, J., Andrews, J., Bjorck, S., Cwynar, L.C., Hughen, K., Kershaw, P., Kromer, B., Litt, T., Lowe, D.J., Nakagawa, T., Newnham, R., and Schwander, J. Formal definition and dating of the GSSP (Global Stratotype Section and Point) for the base of the Holocene using the Greenland NGRIP ice core, and selected auxiliary records. Journal of Quaternary Science 24, (2009). 3–17.Google Scholar
Walsh, M., Lees, J., and Burke, P.J. County Sligo soils and their grazing capacity. Farm and Food Research (Foras Taluntais) 7, 6 (1976). 128–131.Google Scholar
Warren, G., Davis, S., McClatchie, M., and Sands, R. The potential role of humans in structuring the wooded landscapes of Mesolithic Ireland: a review of data and discussion of approaches. Vegetation History and Archaeobotany. (2013). (http://dx.doi.org/10.1007/s00334-013-0417-z in press)Google Scholar
Weir, D.A. A palynological study of landscape and agricultural development in County Louth in the second millennium BC and the first millennium AD. Discovery Programme Reports: 2. Project Results 1993. (1995). Royal Irish Academy/Discovery Programme, Dublin, Ireland. 77–126.Google Scholar
Whitehouse, N.J., Schulting, R.J., McClatchie, M., Barratt, P., McLaughlin, T.R., Bogaard, A., Colledge, S., Marchant, R., Gaffrey, J., and Bunting, M.J. Neolithic agriculture on the European western frontier: the boom and bust of early farming in Ireland. Journal of Archaeological Science (2013). http://dx.doi.org/10.1016/j.jas.2013.08.009Google Scholar
Whittle, A., Healy, F., and Bayliss, A. Gathering Time. Dating the Early Neolithic Enclosures of Southern Britain and Ireland. vols. 1 and 2, (2011). Oxbow Books, Oxford.Google Scholar
Woodbridge, J., Fyfe, R.M., Roberts, N., Downey, S., Edinborough, K., and Shennan, S. The impact of the Neolithic agricultural transition in Britain: a comparison of pollen-based land-cover and archaeological 14C date-inferred population change. Journal of Archaeological Science (2012). http://dx.doi.org/10.1016/j.jas.2012.10.025Google Scholar
Woodman, P.C. Ireland’s place in the European Mesolithic: why it’s ok to be different. McCartan, S., Schulting, R., Warren, G., and Woodman, P. Mesolithic Horizons. Vol. 1. (2009). Oxbow Books, Oxford. xxxvii–xlvi.Google Scholar
Woodman, P.C., and Milner, N. 'From restaurant to take-away': placing Sligo shell middens in context. Timoney, M.A. Dedicated to Sligo. Thirty-four Essays on Sligo's Past. (2013). Publishing Sligo's Past, Keash (Co. Sligo). 37–40.Google Scholar
Yafa, C., and Farmer, J.G. A comparative study of acid extractable and total digestion methods for the determination of inorganic elements in peat material by inductively coupled plasma-optical emission spectrometry. Analytica Chimica Acta 557, (2006). 296–303.CrossRefGoogle Scholar
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