globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.12.021
论文题名:
Ecological effects of natural hazards and human activities on the Ecuadorian Pacific coast during the late Holocene
作者: Lim S.; Ledru M.-P.; Valdez F.; Devillers B.; Houngnon A.; Favier C.; Bremond L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 415
起始页码: 197
结束页码: 209
语种: 英语
英文关键词: Chocó biogeographic region ; Ecuador ; Holocene ; Pacific coast ; Pollen ; Rainforest
英文摘要: The La Tolita archeological site is located in the Province of Esmeraldas in the northwestern part of Ecuador at the border with Colombia. This area comprises one of the world's wettest coastal regions with mangrove and swamps along the coast and has one of the richest tropical rainforest of the planet, extending inland. Today this region is seriously affected by natural hazards including earthquakes, deposition of thick layers of volcanic ash, tsunamis, and El Niño flooding. The region also hosted one of the most important and famous cultures of the late Holocene, the La Tolita-Tumaco, which dominated northern South America between 2900 and 1100. yr BP. With the aim of characterizing the influence on the environment of the different factors of natural hazards, climate changes, and human activities, we drilled a 4-m long sediment core in a swamp close to the La Tolita site. The record dates back to 5000. years BP. Multiproxy analyses of pollen, microcharcoal, XRF-based geochemical data, and geochronology were performed on the sediment to distinguish the different drivers of change. At ~. 3000. yr BP, an earthquake dramatically modified the landscape, elevating the ground and changing the course of the rivers. In the following two millennia until 1100. yr BP, raised-field agricultural activities dominated the site, providing evidence for an increase in the local population. Human activity progressively declined after 1100. yr BP, with the loss of the regional influence of the Tolita culture. The climate remained permanently moist throughout the sediment record, both the rainforest and the mangrove remained well developed, and marine incursions were short and frequent. © 2013 Elsevier B.V. All rights reserved.
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被引频次[WOS]:9   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69161
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作者单位: Université Montpellier 2, ISEM (UM2 CNRS IRD), Place Eugène Bataillon cc 061, Montpellier, France; IRD, UMR 226, Institut des Sciences de l'Evolution de Montpellier (ISEM) (UM2 CNRS IRD), Place Eugène Bataillon cc 061, Montpellier Cedex, France; IRD, UMR 208 PALOC (IRD MNHN), Institut National du Patrimoine Culturel (INPC), Quito, Ecuador; Université de Montpellier 3, ASM (UMR5140), 390 Avenue de Pérols, Lattes, France; CBAE ISEM, Institut de Botanique, Montpellier, France; CNRS, UMR 5554 ISEM (UM2 CNRS IRD), Place Eugène Bataillon cc 061, Montpellier Cedex, France; Centre for Bio-Archaeology and Ecology, UMR5059, CNRS, Université Montpellier 2, EPHE, Montpellier, France; Paleoenvironments and Chronoecology (PALECO EPHE), École Pratique des Hautes Études, Montpellier, France

Recommended Citation:
Lim S.,Ledru M.-P.,Valdez F.,et al. Ecological effects of natural hazards and human activities on the Ecuadorian Pacific coast during the late Holocene[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,415
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