Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions

The abundance and distribution of ostracodes in the upper 865 cm of a sediment core recovered from Babícora paleolake allows reconstruction of paleoecological conditions in the western Chihuahuan Desert by inferring variations in temperature and salinity of the lake water over the last ca. 72 cal ky...

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Detalhes bibliográficos
Autores: Claudia M. Chávez-Lara, Priyadarsi D. Roy, Margarita M. Caballero, Ana Luisa Carreño, Chokkalingam Lakshumanan
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2012
País:México
Recursos:Universidad Nacional Autónoma de México
Repositório:Redalyc-UNAM
OAI Identifier:oai:redalyc.org:57224696010
Acesso em linha:https://www.redalyc.org/articulo.oa?id=57224696010
Access Level:Acceso aberto
Palavra-chave:Ciencias de la Tierra
Mexico
Ostracode
paleoecology
Late Quaternary
Chihuahuan Desert
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spelling Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditionsClaudia M. Chávez-LaraPriyadarsi D. RoyMargarita M. CaballeroAna Luisa CarreñoChokkalingam LakshumananCiencias de la TierraMexicoOstracodepaleoecologyLate QuaternaryChihuahuan DesertThe abundance and distribution of ostracodes in the upper 865 cm of a sediment core recovered from Babícora paleolake allows reconstruction of paleoecological conditions in the western Chihuahuan Desert by inferring variations in temperature and salinity of the lake water over the last ca. 72 cal kyr BP. The ostracode assemblage consists of five species (Candona patzcuaro Tressler, Cypridopsis vidua Brady, Limnocythere bradburyi Forester, L. platyforma Delorme and L. Ceriotuberosa Delorme), and its abundance varies between 0 and 1441 valves/g. Low ostracode abundance suggests the presence of dilute lake water (salinity>100 ppm) with abundant fresh water inflow into the basin prior to ca. 57 cal kyr BP. During ca. 57-49 cal kyr BP salinity remained low (>100 ppm), but the water column was characterized by cold temperatures (>4 °C). Sediments of this zone have higher organic carbon content. Conditions were optimal for ostracode productivity (abundance of 44-1441 valves/g) during ca. 49-29 cal kyr BP, and this zone indicates fluctuating temperature (5-32 °C) and salinity (100-100,000 ppm). A warm water column (>13 °C) and salinity of >500 ppm are inferred during ca. 29-12 cal kyr BP. Sediments of the last 12 cal kyr BP lack preserved ostracodes, and precipitation of authigenic calcite indicates periodic desiccation of the lacustrine basin during the Holocene. The inferred paleoecological conditions in the western Chihuahuan Desert are synchronous with other proxy-based late Quaternary paleohydrologicaland paleoclimatic information obtained from southwestern USA and northern Mexico.Universidad Nacional Autónoma de México2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdf1026-8774https://www.redalyc.org/articulo.oa?id=57224696010Revista Mexicana de Ciencias Geológicas (México) Num.2 Vol.29reponame:Redalyc-UNAMinstname:Universidad Nacional Autónoma de Méxicoinstacron:UNAMenhttp://www.redalyc.org/revista.oa?id=572Revista Mexicana de Ciencias Geológicasinfo:eu-repo/semantics/openAccessoai:redalyc.org:572246960102025-09-03T18:07:41Z
dc.title.none.fl_str_mv Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions
title Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions
spellingShingle Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions
Claudia M. Chávez-Lara
Ciencias de la Tierra
Mexico
Ostracode
paleoecology
Late Quaternary
Chihuahuan Desert
title_short Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions
title_full Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions
title_fullStr Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions
title_full_unstemmed Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions
title_sort Lacustrine ostracodes from the Chihuahuan Desert of Mexico and inferred Late Quaternary paleoecological conditions
dc.creator.none.fl_str_mv Claudia M. Chávez-Lara
Priyadarsi D. Roy
Margarita M. Caballero
Ana Luisa Carreño
Chokkalingam Lakshumanan
author Claudia M. Chávez-Lara
author_facet Claudia M. Chávez-Lara
Priyadarsi D. Roy
Margarita M. Caballero
Ana Luisa Carreño
Chokkalingam Lakshumanan
author_role author
author2 Priyadarsi D. Roy
Margarita M. Caballero
Ana Luisa Carreño
Chokkalingam Lakshumanan
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias de la Tierra
Mexico
Ostracode
paleoecology
Late Quaternary
Chihuahuan Desert
topic Ciencias de la Tierra
Mexico
Ostracode
paleoecology
Late Quaternary
Chihuahuan Desert
description The abundance and distribution of ostracodes in the upper 865 cm of a sediment core recovered from Babícora paleolake allows reconstruction of paleoecological conditions in the western Chihuahuan Desert by inferring variations in temperature and salinity of the lake water over the last ca. 72 cal kyr BP. The ostracode assemblage consists of five species (Candona patzcuaro Tressler, Cypridopsis vidua Brady, Limnocythere bradburyi Forester, L. platyforma Delorme and L. Ceriotuberosa Delorme), and its abundance varies between 0 and 1441 valves/g. Low ostracode abundance suggests the presence of dilute lake water (salinity>100 ppm) with abundant fresh water inflow into the basin prior to ca. 57 cal kyr BP. During ca. 57-49 cal kyr BP salinity remained low (>100 ppm), but the water column was characterized by cold temperatures (>4 °C). Sediments of this zone have higher organic carbon content. Conditions were optimal for ostracode productivity (abundance of 44-1441 valves/g) during ca. 49-29 cal kyr BP, and this zone indicates fluctuating temperature (5-32 °C) and salinity (100-100,000 ppm). A warm water column (>13 °C) and salinity of >500 ppm are inferred during ca. 29-12 cal kyr BP. Sediments of the last 12 cal kyr BP lack preserved ostracodes, and precipitation of authigenic calcite indicates periodic desiccation of the lacustrine basin during the Holocene. The inferred paleoecological conditions in the western Chihuahuan Desert are synchronous with other proxy-based late Quaternary paleohydrologicaland paleoclimatic information obtained from southwestern USA and northern Mexico.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 1026-8774
https://www.redalyc.org/articulo.oa?id=57224696010
identifier_str_mv 1026-8774
url https://www.redalyc.org/articulo.oa?id=57224696010
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv http://www.redalyc.org/revista.oa?id=572
dc.rights.none.fl_str_mv Revista Mexicana de Ciencias Geológicas
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Revista Mexicana de Ciencias Geológicas
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional Autónoma de México
publisher.none.fl_str_mv Universidad Nacional Autónoma de México
dc.source.none.fl_str_mv Revista Mexicana de Ciencias Geológicas (México) Num.2 Vol.29
reponame:Redalyc-UNAM
instname:Universidad Nacional Autónoma de México
instacron:UNAM
instname_str Universidad Nacional Autónoma de México
instacron_str UNAM
institution UNAM
reponame_str Redalyc-UNAM
collection Redalyc-UNAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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