globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.07.038
Scopus记录号: 2-s2.0-85050990696
论文题名:
Impact of climate change on the ecology of the Kyambangunguru crater marsh in southwestern Tanzania during the Late Holocene
作者: Coffinet S.; Huguet A.; Bergonzini L.; Pedentchouk N.; Williamson D.; Anquetil C.; Gałka M.; Kołaczek P.; Karpińska-Kołaczek M.; Majule A.; Laggoun-Défarge F.; Wagner T.; Derenne S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 196
起始页码: 100
结束页码: 117
语种: 英语
英文关键词: Continental biomarkers ; East Africa ; Holocene ; Organic geochemistry ; Paleoclimatology ; Paleolimnology ; Palynology ; Stable isotopes
Scopus关键词: Ecology ; Geochemistry ; Isotopes ; Paleolimnology ; Paraffins ; Plants (botany) ; Wetlands ; East Africa ; Holocenes ; Organic geochemistry ; Paleoclimatology ; Palynology ; Stable isotopes ; Climate change ; biomarker ; climate change ; climate effect ; crater ; environmental history ; geochemistry ; historical record ; Holocene ; hydrometeorology ; Little Ice Age ; Medieval Warm Period ; paleoclimate ; paleolimnology ; palynology ; reconstruction ; stable isotope ; Tanzania
英文摘要: Instrumental records of temperature and hydrological regimes in East Africa evidence frequent droughts with dramatic effects on population and ecosystems. Sources of these climatic variations remain largely unconstrained, partly because of a paucity of Late Holocene records. Here, we present a multi-proxy analysis of a 4-m continuous sediment core collected in the Kyambangunguru crater marsh, in southwest Tanzania, covering the last 4000 yrs (cal. BP). We used microscopic (macro-remains, microfossils, palynofacies, pollen), elemental (carbon, nitrogen contents), molecular (br GDGTs, n-alkanes) and compound-specific isotopic (δ2H n-alkanes) investigations to reconstruct the environmental history of the marsh. The multi proxy record reveals that, 2500 years ago, the marsh underwent a major ecological transition from a lake to a peatland. Temperature and hydrological reconstructions evidence warmer and drier conditions between 2200 and 860 cal. BP, which probably triggered the establishment of a perennial peatland. This study is one of the first combined temperature and precipitation record of Late Holocene in the region and highlights changes in the spatial distribution of the East African climate regimes. Several cold periods are observed, between 3300 and 2000 cal. BP and since 630 cal. BP, the latter corresponding to the Little Ice Age. Moreover, wetter conditions are reported during the Medieval Climate Anomaly in contrast to other north-eastern African records suggesting that Tanzania is located at the transition between two hydro-climatic zones (north-eastern versus southern Africa) and has experienced variable contributions of these two zones over the last millennium. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112085
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作者单位: Sorbonne Université, CNRS, EPHE, PSL, UMR METIS, Campus Pierre et Marie Curie, 4 Place Jussieu, Paris cedex 05, 75252, France; Université Paris Saclay, UPS Univ Paris 11, CNRS, UMR GEOPS, rue du belvédère, Bât 504, Orsay cedex, 91405, France; School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, United Kingdom; Sorbonne Université, Institut de Recherche pour le Développement, MNHN, CNRS, UMR LOCEAN, Centre IRD France Nord, Bondy cedex, F-93143, France; Department of Biogeography and Paleoecology, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University in Poznań, Krygowskiego 10, Poznań, 61-680, Poland; Laboratory of Wetland Ecology and Monitoring, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University in Poznań, Krygowskiego 10, Poznań, 61-680, Poland; Centre for the Study of Demographic and Economic Structures in Preindustrial Central and Eastern Europe, University of Bialystok, Plac Uniwersytecki 1, Białystok, 15-420, Poland; Institute of Resource Assessment, University of Dar Es Salaam, Dar Es Salaam, 35097, Tanzania; Université d'Orléans, CNRS, BRGM, UMR ISTO, 1A rue de la Férollerie, Orléans, 45071, France; Heriot-Watt University, Lyell Centre for Earth and Marine Science and Technology, School of Energy, Geoscience, Infrastructure and Society (EGIS), Edinburgh, EH14 4AS, United Kingdom; Institute of Plant Physiology, Russian Academy of Sciences, Moscow, 127276, Russian Federation; Organic Geochemistry Group, MARUM - Center for Marine Environmental Sciences & Department of Geosciences, University of Bremen, Leobener St. 8., Bremen, Germany

Recommended Citation:
Coffinet S.,Huguet A.,Bergonzini L.,et al. Impact of climate change on the ecology of the Kyambangunguru crater marsh in southwestern Tanzania during the Late Holocene[J]. Quaternary Science Reviews,2018-01-01,196
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