globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1715336115
论文题名:
Early anthropogenic impact on Western Central African rainforests 2;600 y ago
作者: Garcin Y.; Deschamps P.; Ménot G.; De Saulieu G.; Schefuß E.; Sebag D.; Dupont L.M.; Oslisly R.; Brademann B.; Mbusnum K.G.; Onana J.-M.; Ako A.A.; Epp L.S.; Tjallingii R.; Strecker M.R.; Brauer A.; Sachse D.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2018
卷: 115, 期:13
起始页码: 3261
结束页码: 3266
语种: 英语
英文关键词: Human activity ; Late holocene ; Paleohydrology ; Rainforest crisis ; Western Central Africa
Scopus关键词: carbon 13 ; hydrogen ; anthropogenic impact ; Article ; Central Africa ; controlled study ; environmental impact ; human ; human activities ; hydrology ; isotope analysis ; nonhuman ; plant ; plant wax ; priority journal ; rain forest ; vegetation ; Africa ; archeology ; Cameroon ; climate change ; ecosystem ; time factor ; Africa ; Archaeology ; Cameroon ; Climate Change ; Ecosystem ; Humans ; Rainforest ; Time Factors
英文摘要: A potential human footprint on Western Central African rainforests before the Common Era has become the focus of an ongoing controversy. Between 3,000 y ago and 2,000 y ago, regional pollen sequences indicate a replacement of mature rainforests by a forest–savannah mosaic including pioneer trees. Although some studies suggested an anthropogenic influence on this forest fragmentation, current interpretations based on pollen data attribute the “rainforest crisis” to climate change toward a drier, more seasonal climate. A rigorous test of this hypothesis, however, requires climate proxies independent of vegetation changes. Here we resolve this controversy through a continuous 10,500-y record of both vegetation and hydrological changes from Lake Barombi in Southwest Cameroon based on changes in carbon and hydrogen isotope compositions of plant waxes. δ13C-inferred vegetation changes confirm a prominent and abrupt appearance of C4 plants in the Lake Barombi catchment, at 2,600 calendar years before AD 1950 (cal y BP), followed by an equally sudden return to rainforest vegetation at 2,020 cal y BP. δD values from the same plant wax compounds, however, show no simultaneous hydrological change. Based on the combination of these data with a comprehensive regional archaeological database we provide evidence that humans triggered the rainforest fragmentation 2,600 y ago. Our findings suggest that technological developments, including agricultural practices and iron metallurgy, possibly related to the large-scale Bantu expansion, significantly impacted the ecosystems before the Common Era. © 2018 National Academy of Sciences. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163732
Appears in Collections:气候变化与战略

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作者单位: Garcin, Y., Institute of Earth and Environmental Science, University of Potsdam, Potsdam, 14476, Germany; Deschamps, P., Aix-Marseille Université, CNRS, IRD, Collège de France, Centre Européen de Recherche et d’Enseignement des Géosciences de l’Environnement UM34, Aix-en-Provence, 13545, France; Ménot, G., Univ Lyon, Ens de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, Lyon, 69342, France; De Saulieu, G., Patrimoines Locaux et Gouvernance UMR 208, IRD, MNHN, Paris, 75005, France; Schefuß, E., MARUM–Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany; Sebag, D., Normandie Université, UNIROUEN, UNICAEN, CNRS, M2C, Rouen, 76000, France, HSM, LMI Picass’Eau, IRD, Université de Montpellier, Montpellier, 34095, France, Institute of Earth Surface Dynamics, Geopolis, University of Lausanne, Lausanne, 1015, Switzerland; Dupont, L.M., MARUM–Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany; Oslisly, R., Patrimoines Locaux et Gouvernance UMR 208, IRD, MNHN, Paris, 75005, France, Agence Nationale des Parcs Nationaux, Libreville, 20379, Gabon; Brademann, B., Section 5.2, Climate Dynamics and Landscape Evolution, GFZ–German Research Centre for Geosciences, Potsdam, 14473, Germany; Mbusnum, K.G., Laboratoire de Chimie de l’Environnement FRE 3416, Aix-Marseille Université, CNRS, Aix-en-Provence, 13545, France; Onana, J.-M., Department of Plant Biology, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon, Herbier National du Cameroun, Institut de Recherche Agricole pour le Développement, Yaoundé, Cameroon; Ako, A.A., Institute of Geological and Mining Research, Yaoundé, Cameroon; Epp, L.S., Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, 14473, Germany; Tjallingii, R., Section 5.2, Climate Dynamics and Landscape Evolution, GFZ–German Research Centre for Geosciences, Potsdam, 14473, Germany; Strecker, M.R., Institute of Earth and Environmental Science, University of Potsdam, Potsdam, 14476, Germany; Brauer, A., Section 5.2, Climate Dynamics and Landscape Evolution, GFZ–German Research Centre for Geosciences, Potsdam, 14473, Germany; Sachse, D., Section 5.1, Geomorphology, GFZ–German Research Centre for Geosciences, Potsdam, 14473, Germany

Recommended Citation:
Garcin Y.,Deschamps P.,Ménot G.,et al. Early anthropogenic impact on Western Central African rainforests 2;600 y ago[J]. Proceedings of the National Academy of Sciences of the United States of America,2018-01-01,115(13)
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