globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2013.07.011
Scopus记录号: 2-s2.0-84884379180
论文题名:
Late Quaternary record of the vegetation and catchment-related changes from Lake Paravani (Javakheti, South Caucasus)
作者: Messager E.; Belmecheri S.; Von Grafenstein U.; Nomade S.; Ollivier V.; Voinchet P.; Puaud S.; Courtin-Nomade A.; Guillou H.; Mgeladze A.; Dumoulin J.-P.; Mazuy A.; Lordkipanidze D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 77
起始页码: 125
结束页码: 140
语种: 英语
英文关键词: Glacial tree refugia ; Holocene ; Lateglacial ; Local glacier ; South Caucasus
Scopus关键词: Caucasus ; Climate condition ; Edaphic conditions ; Glacial tree refugia ; Holocenes ; Lake productivities ; Last glacial period ; Lateglacial ; Catchments ; Deforestation ; Glacial geology ; Productivity ; Reforestation ; Lakes ; anthropogenic effect ; catchment ; coniferous tree ; deciduous tree ; Holocene ; late glacial ; paleoecology ; palynology ; refugium ; Younger Dryas ; Deforestation ; Lakes ; Productivity ; Reforestation ; Caucasus ; Georgia (republic) ; Paravani Lake
英文摘要: Here we present a palynological and sedimentological record from a 96-cm sediment core covering the last 13ka aiming to document palaeoecological changes in the central South Caucasus driven by climate and/or human impact. The core was retrieved from Lake Paravani (2073masl, 41°27'N, 43°48'E), located in the steppic grasslands of South Caucasus in the Samsari-Javakheti volcanic plateau. The geomorphological features observed on the plateau, including moraine deposits, suggest the presence of local glaciers reaching the lake level during the Last Glacial periods. Based on sediment and pollen data, three palaeoecological phases have been identified. The first phase spanning the Younger Dryas and the Early Holocene, corresponds to a steppic environment with a limited lake productivity driven by a cold and particularly dry climate. According to the Age-depth model, this phase ends near 8500cal BP with the decline of Chenopodiaceae. The second phase starts with an important expansion of trees at 8300cal years BP. The delayed afforestation recorded in Lake Paravani is a pattern that has now been recognised widely through the Black Sea region's more continental areas. As soon as the climatic and edaphic conditions were favourable, the main deciduous and coniferous trees expanded concurrently due totheproximity of glacial forest refugia located in western Caucasus. This second phase marked by aclimatic optimum is also characterized by an increase in lake productivity. The third phase starts at 2000-3000cal BP and corresponds to the decline of forests on the plateau and the expansion of herbaceous formations, leading to the present-day steppic environment. This deforestation phase is driven by the deterioration of the climate conditions and human impact. © 2013 .
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60515
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作者单位: UMR 7264, CEPAM-CNRS Université de Nice Sophia Antipolis, Campus Saint Jean D'Angély, 06357 Nice Cedex 4, France; The Earth and Environmental Systems Institute, Pennsylvania State University, 412A Walker Building, University Park, PA 16802, United States; LSCE/IPSL, Laboratoire CEA-CNRS-UVSQ, Domaine du CNRS, Bât. 12, Avenue de la Terrasse, 91198 Gif sur Yvette, France; Département de Préhistoire, Muséum national d'Histoire naturelle, Paris, UMR 7194 du CNRS, 1 rue René Panhard, 75013 Paris, France; UMR 7192, CNRS Proche-Orient, Caucase: Langues, Archéologie, Cultures, Collège de France, 52 rue du Cardinal Lemoine, 75005 Paris, France; Université de Limoges, GRESE, EA 4330, FST, 123 Avenue Albert Thomas, 87060 Limoges, France; Georgian National Museum, 3 Rustaveli Avenue, 0105 Tbilisi, Georgia; UMS 2572, Laboratoire de Mesure du Carbone 14, CEA Saclay, 91191 Gif sur Yvette, France

Recommended Citation:
Messager E.,Belmecheri S.,Von Grafenstein U.,et al. Late Quaternary record of the vegetation and catchment-related changes from Lake Paravani (Javakheti, South Caucasus)[J]. Quaternary Science Reviews,2013-01-01,77
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