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DOI10.1023/A:1014215818589
A paleoenvironmental reconstruction of Laguna Babicora, Chihuahua, Mexico based on ostracode paleoecology and trace element shell chemistry
Palacios-Fest, MR; Carreno, AL; Ortega-Ramirez, JR; Alvarado-Valdez, G
通讯作者Palacios-Fest, MR
来源期刊JOURNAL OF PALEOLIMNOLOGY
ISSN0921-2728
EISSN1573-0417
出版年2002
卷号27期号:2页码:185-206
英文摘要

Paleoecology of Laguna Babicora, Chihuahua, Mexico was reconstructed using ostracode faunal assemblages and shell chemistry. The paleolimnological record is used to show the magnitude of paleoclimatic changes in the area from 25,000 years to the present.


Faunal assemblages consist of four species of the genus Limnocythere: L. sappaensis, L. ceriotuberosa, L. bradburyi and L. platyforma, all associated with Candona caudata, Candona patzcuaro and Cypridopsis vidua. A paleosalinity index developed from these assemblages indicates that the lake’s salinity fluctuated frequently from oligo- to meso-haline conditions during the last less than or similar to 25,000 years. This pattern and low salinity range are in good agreement with modern TDS (here used as an indicator of salinity) values recorded from 26 wells and one spring from the area (258-975 mg l(-1)). To estimate paleotemperature we examined the trace element content (Mg/Ca ratios) from individual valves of L. ceriotuberosa and L. platyforma, the two species most commonly recorded in Laguna Babicora.


Shell Mg/Ca ratios of 204 specimens of these two species were used to estimate water temperature (Mg/Ca) by means of experimental standard coefficients. Our data show that paleowater temperature ranged from 5.6-21.3 degreesC (with 2sigma values ranging from 0.2-4.8 degreesC), which suggest a close correlation with atmospheric temperatures around the lake. These results are in good agreement with a modern mean winter temperature (3.5 degreesC) and mean summer temperature (20 degreesC) recorded in the area between 1970 and 1980.


英文关键词ostracodes paleotemperature lake evolution Pleistocene-Holocene
类型Article
语种英语
国家USA ; Mexico
收录类别SCI-E
WOS记录号WOS:000173990500003
WOS关键词LATE PLEISTOCENE-HOLOCENE ; STABLE-ISOTOPE ; CLIMATE ; DESERT ; LAKE ; PALEOSALINITY ; WOODLANDS ; MAGNESIUM ; RECORD
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Limnology
WOS研究方向Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
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/2XILL650/143211
作者单位(1)Terra Nostra Earth Sci Res, Tucson, AZ 85741 USA;(2)Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico;(3)Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico;(4)Univ San Luis Potosi, Dept Geol, San Luis Potosi 78290, Mexico
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Palacios-Fest, MR,Carreno, AL,Ortega-Ramirez, JR,et al. A paleoenvironmental reconstruction of Laguna Babicora, Chihuahua, Mexico based on ostracode paleoecology and trace element shell chemistry[J]. Universidad Nacional Autónoma de México,2002,27(2):185-206.
APA Palacios-Fest, MR,Carreno, AL,Ortega-Ramirez, JR,&Alvarado-Valdez, G.(2002).A paleoenvironmental reconstruction of Laguna Babicora, Chihuahua, Mexico based on ostracode paleoecology and trace element shell chemistry.JOURNAL OF PALEOLIMNOLOGY,27(2),185-206.
MLA Palacios-Fest, MR,et al."A paleoenvironmental reconstruction of Laguna Babicora, Chihuahua, Mexico based on ostracode paleoecology and trace element shell chemistry".JOURNAL OF PALEOLIMNOLOGY 27.2(2002):185-206.
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