Knowledge Resource Center for Ecological Environment in Arid Area
Post-Columbian environmental history of Lago Peten Itza, Guatemala | |
Perez, Liseth1; Bugja, Rita1; Massaferro, Julieta2; Steeb, Philip1; van Geldern, Robert3; Frenzel, Peter4; Brenner, Mark5,6; Scharf, Burkhard1; Schwalb, Antje1 | |
通讯作者 | Perez, Liseth |
来源期刊 | REVISTA MEXICANA DE CIENCIAS GEOLOGICAS |
ISSN | 1026-8774 |
出版年 | 2010 |
卷号 | 27期号:3页码:490-507 |
英文摘要 | Two similar to 40-cm-long sediment cores, PI-SC-1-10m and PI-SC-2-40m, were recovered at 10 and 40 m water depth, respectively, from Lago Peten Itza, in the Department of Peten, northern Guatemala. The cores span the last similar to 525 years of sediment accumulation in the basin. This study explores lake level and trophic state changes that Lago Peten Itza has experienced since European contact in the early 1500s. We inferred past environmental variability using changes in sediment geochemistry and fluctuations in relative species abundances of ostracode and chironomid fossil assemblages. Changes in concentrations of organic matter (OM), carbonate, total carbon (TC), total nitrogen (TN), C/N ratios, bromine (Br), and faunal relative abundances were used to infer changes in the trophic status of the lake. Cultural eutrophication began in the 1930s, and anthropogenic impact increased significantly after similar to 1970. Higher linear sedimentation rates, up to 9.1 mm yr(-1), began recently. They are attributed to increases in riparian settlement, deforestation and associated land use changes, which led to accelerated soil erosion. An ostracode-based transfer function was applied to assemblages in core PI-SC-1-10m, which enabled us to identify periods when lake level fluctuated. Such historical fluctuations in lake levels were driven primarily by changes in rainfall. Past lake levels can be summarized as follows: (1) fluctuating, high lake levels from similar to 1550s to the 1730s and from the early 1940s to 2005, and (2) stable, lower lake levels from about 1750 to the early 1900s. Higher relative abundance of the ostracode Physocypria globula and higher rubidium (Rb) concentrations indicate higher lake levels than today. Chironomids also show sharp fluctuations along the cores that could be related to water level changes. The presence of chironomid assemblages Chironomus, Procladius, and Einfeldia from 1960-2000 AD shows high productivity levels. The Lago Peten Itza sediment record indicates a generally arid Little Ice Age (LIA), with exceptions around 1580 and 1650 when high lake levels similar to those of the 20(th) century, i.e. similar to 5 m higher than today, indicate more humid conditions. |
英文关键词 | freshwater ostracodes chironomids lake level geochemistry eutrophication Lago Peten Itza Guatemala |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Argentina ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000285315900007 |
WOS关键词 | WATER OSTRACODES CRUSTACEA ; LOWLAND CENTRAL-AMERICA ; LATE QUATERNARY ; YUCATAN PENINSULA ; LAKE-SEDIMENTS ; CLIMATE-CHANGE ; MAYA LOWLANDS ; ORGANIC-MATTER ; SOUTHERN CHILE ; QUINTANA-ROO |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/166332 |
作者单位 | 1.Tech Univ Carolo Wilhelmina Braunschweig, Inst Umweltgeol, D-38106 Braunschweig, Germany; 2.Consejo Nacl Invest Cient & Tecn, CENAC APN, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina; 3.Univ Erlangen Nurnberg, GeoZentrum Nordbayern, D-90518 Erlangen, Germany; 4.Univ Jena, Inst Geowissensch, D-07749 Jena, Germany; 5.Univ Florida, Dept Geol Sci, Gainesville, FL 32611 USA; 6.Univ Florida, Land Use & Environm Change Inst, Gainesville, FL 32611 USA |
推荐引用方式 GB/T 7714 | Perez, Liseth,Bugja, Rita,Massaferro, Julieta,et al. Post-Columbian environmental history of Lago Peten Itza, Guatemala[J],2010,27(3):490-507. |
APA | Perez, Liseth.,Bugja, Rita.,Massaferro, Julieta.,Steeb, Philip.,van Geldern, Robert.,...&Schwalb, Antje.(2010).Post-Columbian environmental history of Lago Peten Itza, Guatemala.REVISTA MEXICANA DE CIENCIAS GEOLOGICAS,27(3),490-507. |
MLA | Perez, Liseth,et al."Post-Columbian environmental history of Lago Peten Itza, Guatemala".REVISTA MEXICANA DE CIENCIAS GEOLOGICAS 27.3(2010):490-507. |
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。