Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1177/0959683607078994 |
Holocene environmental changes in the Gallocanta lacustrine basin, Iberian Range, NE Spain | |
Luzon, A.; Perez, A.; Mayayo, M. J.; Soria, A. R.; Goni, M. F. Sanchez; Roc, A. C. | |
通讯作者 | Luzon, A. |
来源期刊 | HOLOCENE
![]() |
ISSN | 0959-6836 |
出版年 | 2007 |
卷号 | 17期号:5页码:649-663 |
英文摘要 | The sedimentological and palynological study of the Gallocanta lake sediments, in the NE of Spain, has allowed the Holocene environmental evolution of this lacustrine basin to be established, and several changes in the hydrological balance to be interpreted. The chronology of the sequence is based on new radiocarbon datings and Pb-210 radiometric techniques. Ten facies have been characterized, which have been grouped into five sedimentary units: two (Units A and B) are interpreted as deposited in alluvial areas, and three (Units C, D and E) in lacustrine environments. Moreover five pollen zones have been established for this succession. From the stratigraphic correlation of the cores extracted in this lake, three stages in the basin evolution have been interpreted. Stage 1 was characterized by a broad development of alluvial fans during the Fullglacial or Lateglacial times. The sediments of this stage are lacking in pollen as they were exposed for most of the time. Stage 2 started around 10 100yr BP and is characterized by the establishment of a brackish lake linked to a decrease in alluvial supplies and a more positive water balance. The maximum lake level would have been reached around 8010 yr BP coinciding with the relatively moist period of the beginning of the Holocene recorded in some Spanish lakes, although this dating would not match that of other areas of the Iberian Peninsula, in which the maximum lake levels have been recorded around 6000 yr BP. A sharp decrease in the lacustrine level has been registered at 3405 yr BP, which may be correlated to a change to more arid conditions. Nevertheless, the lake level recovered later. Stage 3 was linked to the development of an ephemeral shallow lake. An age of AD 1840 yr has been calculated for this palaeogeographical change. The data obtained suggest that the main vegetation changes during stage 2 were more related to climate variability, whereas during stage 3 the anthropogenic impact became more significant. |
英文关键词 | lacustrine sediments saline lakes vegetation history palaeogeography Holocene C-14 AMS Gallocanta lake Iberian Peninsula |
类型 | Article |
语种 | 英语 |
国家 | Spain ; France |
收录类别 | SCI-E |
WOS记录号 | WOS:000248755500009 |
WOS关键词 | CENTRAL EBRO BASIN ; CLIMATIC-CHANGE ; SALINE LAKE ; AGE CALIBRATION ; PLAYA-LAKE ; SEDIMENTS ; EVOLUTION ; RECORD ; PATTERNS ; EUROPE |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/154425 |
作者单位 | (1)Univ Zaragoza, Dept Ciencias Tierra, E-50009 Zaragoza, Spain;(2)Univ Bordeaux 1, EPHE, CNRS, UMR 5805,EPOC, F-33405 Talence, France |
推荐引用方式 GB/T 7714 | Luzon, A.,Perez, A.,Mayayo, M. J.,et al. Holocene environmental changes in the Gallocanta lacustrine basin, Iberian Range, NE Spain[J],2007,17(5):649-663. |
APA | Luzon, A.,Perez, A.,Mayayo, M. J.,Soria, A. R.,Goni, M. F. Sanchez,&Roc, A. C..(2007).Holocene environmental changes in the Gallocanta lacustrine basin, Iberian Range, NE Spain.HOLOCENE,17(5),649-663. |
MLA | Luzon, A.,et al."Holocene environmental changes in the Gallocanta lacustrine basin, Iberian Range, NE Spain".HOLOCENE 17.5(2007):649-663. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。