Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.quascirev.2018.05.013 |
A 27cal ka biomarker-based record of ecosystem changes from lacustrine sediments of the Chihuahua Desert of Mexico | |
Chavez-Lara, C. M.1; Holtvoeth, J.1; Roy, P. D.2; Pancost, R. D.1 | |
通讯作者 | Chavez-Lara, C. M. |
来源期刊 | QUATERNARY SCIENCE REVIEWS |
ISSN | 0277-3791 |
出版年 | 2018 |
卷号 | 191页码:132-143 |
英文摘要 | Hydroclimate variation of the northwest Mexico during the late Pleistocene and Holocene is an active area of debate, with uncertainty in the nature and sources of precipitation. Previous research has inferred the influences of winter storms, summer monsoonal rain and autumn tropical cyclones. The impacts on regional and local ecosystems, however, are not well constrained. Here, we investigate the response of lacustrine and terrestrial habitats of the Santiaguillo Basin in the Chihuahua Desert (Mexico) to hydrological changes occurring since the late last glacial. Biomarkers from the sediments reflect variable input of organic matter (OM) from algal and bacterial biomass, aquatic microfauna and surrounding vegetation, revealing distinct stages of ecosystem adaption over the last 27 cal ka. Based on previously published and new data, we show that a perennial productive lake was present during the late glacial and it persisted until 17.5 cal ka BP. Coinciding with Heinrich event 1, OM supply from deteriorating wetland soils may have been caused by early dry conditions. Further phases of increasing aridity and a shrinking water body drove changing OM quality and biomarker composition during the early and mid-Holocene. A pronounced shift in biomarker distributions at 4 cal ka BP suggests that the supply of plant litter from resinous trees and grasses increased, likely reflecting the establishment of modern vegetation. Our results illustrate the potential of biomarker applications in the area, adding to the evidence of hydroclimate variability and enabling reconstructions of local ecosystem dynamics. (C) 2018 Elsevier Ltd. All rights reserved. |
英文关键词 | Organic geochemistry Continental biomarkers North America Paleoclimatology Paleolimnology Pleistocene Holocene |
类型 | Article |
语种 | 英语 |
国家 | England ; Mexico |
收录类别 | SCI-E |
WOS记录号 | WOS:000437363000010 |
WOS关键词 | FATTY-ACID-COMPOSITION ; CARBON ISOTOPIC COMPOSITION ; NORTH-AMERICAN MONSOON ; N-ALKANE DISTRIBUTIONS ; ORGANIC GEOCHEMISTRY ; CHEMOTAXONOMIC SIGNIFICANCE ; COMMUNITY STRUCTURE ; SANTIAGUILLO BASIN ; TROPICAL CYCLONES ; VEGETATION CHANGE |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | Universidad Nacional Autónoma de México |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/212516 |
作者单位 | 1.Univ Bristol, Cabot Inst, Sch Earth Sci, Organ Geochem Unit,Sch Chem, Bristol, Avon, England; 2.Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Ciudad De Mexico 04510, Mexico |
推荐引用方式 GB/T 7714 | Chavez-Lara, C. M.,Holtvoeth, J.,Roy, P. D.,et al. A 27cal ka biomarker-based record of ecosystem changes from lacustrine sediments of the Chihuahua Desert of Mexico[J]. Universidad Nacional Autónoma de México,2018,191:132-143. |
APA | Chavez-Lara, C. M.,Holtvoeth, J.,Roy, P. D.,&Pancost, R. D..(2018).A 27cal ka biomarker-based record of ecosystem changes from lacustrine sediments of the Chihuahua Desert of Mexico.QUATERNARY SCIENCE REVIEWS,191,132-143. |
MLA | Chavez-Lara, C. M.,et al."A 27cal ka biomarker-based record of ecosystem changes from lacustrine sediments of the Chihuahua Desert of Mexico".QUATERNARY SCIENCE REVIEWS 191(2018):132-143. |
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。