Holocene fire regime changes from multiple-site sedimentary charcoal analyses in the Lourdes basin (Pyrenees,France) |
| |
| Authors: | Damien Rius Boris Vannière Didier Galop Hervé Richard |
| |
| Institution: | 1. Laboratoire Chrono-Environnement, UMR 6249 CNRS, Université de Franche-Comté, UFR ST, 16 route de Gray, 25030 Besançon, France;2. Laboratoire GEODE, UMR 5602 CNRS, Université Toulouse II-le Mirail, 5 allées Antonio Machado, 31058 Toulouse, France;1. GEOLAB (UMR 6042/CNRS), University of Limoges, 39E rue Camille Guérin, 87000 Limoges, France;2. SERP (Seminar of Prehistoric Study and Research), Department of Prehistory, Ancient History and Archaeology, University of Barcelona, C/Montalegre 6, 08001 Barcelona, Spain;3. Clermont Université, Université Blaise Pascal, GEOLAB (UMR 6042/CNRS), Maison des Sciences de l''Homme, BP 10448, F-63000 Clermont-Ferrand, France;4. CNRS, GEOLAB, Laboratoire de Géographie physique et environnementale, 4 rue Ledru, F-63057 Clermont-Ferrand Cedex 1, France;5. Jaume Almera Institute of Earth Sciences, CSIC, C/Lluís Solé Sabarís s/n, Barcelona, Spain;6. Department of Archaeology, University of Nottingham University Park, Nottingham NG7 2RD, UK;7. Catalan Institute of Classical Archaeology, Pl. Rovellat, s/n, 43003 Tarragona, Spain;1. Universidad del País Vasco (UPV-EHU), Facultad de Letras, Dpto. de Geografía, Prehistoria y Arqueología, C/Tomás y Valiente, s/n, 01006 Vitoria-Gasteiz, Alava, Spain;2. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Bizkaia, Spain;1. Senckenberg Research Institute and Natural History Museum, Senckenberganlage 25, 60325 Frankfurt am Main, Germany;2. Biodiversity and Climate Research Centre (BiK-F), Senckenberganlage 25, 60325 Frankfurt am Main, Germany;3. CNRS, UMR 6249 Chrono-Environnement, Université de Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France;4. Centre for Archaeological Sciences, University of Leuven, Celestijnenlaan 200E, Bus 2408, 3001 Leuven, Belgium;5. School of Environment and Life Sciences, University of Salford, Salford M5 4WT, UK;6. Goethe University, Department of Physical Geography, Altenhöferallee 1, 60438 Frankfurt am Main, Germany;1. Paleoenvironments and Chronoecology (PALECO EPHE), École Pratique des Hautes Études, Institut de Botanique, 163 rue Broussonet, F-34090 Montpellier, France;2. Centre for Bio-Archaeology and Ecology (UMR5059 CNRS/UM2/EPHE), Université Montpellier 2, Institut de Botanique, 163 rue Broussonet, F-34090 Montpellier, France;3. Centre d''Étude de la Forêt, Université du Québec à Montréal, C.P. 8888, Montréal, Québec H3C 3P8, Canada;4. Natural Sciences and Engineering Research Council of Canada Industrial Chair in Sustainable Forest Management, Forest Research Institute, Université du Québec en Abitibi-Témiscamingue, 445 boulevard de l''Université, Rouyn-Noranda, Québec J9X 5E4, Canada;5. CNR (Consiglio Nazionale delle Ricerche), Istituto per lo studio degli Ecosistemi, L. Tonolli 50, 28922 Verbania, Italy;6. Università di Padova, Dipartimento di Biologia, via G. Colombo 3, Padova, Italy;1. Department of Geography, University of Wisconsin, 550 North Park St., Madison, WI 53706, USA;2. Department of Geography, University of Oregon, Eugene, OR 97403, USA;3. Univ. Bordeaux, CNRS, EPOC, UMR 5805, 33400 Talence, France;4. PACEA, UMR 5199, 33400 Talence, France;5. School of Biological Sciences, Macquarie University, North Ryde, NSW 2109, Australia;6. Department of Geography, University of Utah, Salt Lake City, UT 84112, USA;7. Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland;8. CNRS, UMR 6249, 16 route de Gray, F-25030 Besançon Cedex, France |
| |
| Abstract: | One lake and three peat bogs from the Lourdes glacial basin (France) were used for macrocharcoal analyses and fire frequency reconstruction over the entire Holocene (11700 years). The chronology was based upon thirty-three 14C AMS dates. Comparison of the distribution of both CHarcoal Accumulation Rate (CHAR) and fire return intervals showed that charcoal accumulation significantly differs between the lake and the peat bogs, but that frequency calculation overcomes the disparity between these site types. A composite frequency was built from the four individual records to assess regional versus local variability and fire regime controls by comparisons with regional fire activity, Holocene climatic oscillations and vegetation history. The millennial variability can be depicted as follows: relatively high frequency between 8000 and 5000 cal a BP (up to 5 fires/500 yrs), relatively low frequency between 5000 and 3000 cal a BP (down to 0 fires/500 yrs), and an increase between 3000 and 500 cal a BP (up to 4 fires/500 yrs). From 8000 to 5000 cal a BP, fire frequency displays strong synchrony between sites and appears to be mostly driven by increased summer temperature characterizing the Holocene Thermal Maximum (HTM). On the contrary, during the last 3000 years fire frequency was heterogeneous between sites and most probably human-driven. However, higher frequency at the millennial scale during the mid-Holocene strongly suggests that the perception of human-driven fire regime depends on the strength of natural controls. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
