气候变化领域集成服务门户(CCPortal): Early anthropogenic impact on Western Central African rainforests 2;600 y ago

CCPortal

DOI	10.1073/pnas.1715336115
	Early anthropogenic impact on Western Central African rainforests 2;600 y ago
	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.
发表日期	2018
ISSN	0027-8424
起始页码	3261
结束页码	3266
卷号	115 期号:13
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.
英文关键词	Human activity; Late holocene; Paleohydrology; Rainforest crisis; Western Central Africa
语种	英语
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
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160534
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 ...
推荐引用方式 GB/T 7714	Garcin Y.,Deschamps P.,Ménot G.,et al. Early anthropogenic impact on Western Central African rainforests 2;600 y ago[J],2018,115(13).
APA	Garcin Y..,Deschamps P..,Ménot G..,De Saulieu G..,Schefuß E..,...&Sachse D..(2018).Early anthropogenic impact on Western Central African rainforests 2;600 y ago.Proceedings of the National Academy of Sciences of the United States of America,115(13).
MLA	Garcin Y.,et al."Early anthropogenic impact on Western Central African rainforests 2;600 y ago".Proceedings of the National Academy of Sciences of the United States of America 115.13(2018).