Distribution of ostracods in west-central Argentina related to host-water chemistry and climate: implications for paleolimnology

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Ecological and biogeographical studies of Neotropical non-marine ostracods are rare, although such information is needed to develop reliable paleoecological and paleoclimatic reconstructions for the region. An extensive, yet little explored South American area of paleoclimatic interest, is the arid-...

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Autores principales: D’Ambrosio, D. Sabina, García, Adriana, Díaz, Analía Roxana, Chivas, Allan, Claps, María Cristina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Naturales
Non-marine ostracods
Limnocythere
Laguna Llancanelo
Arid Diagonal
South America
Paleoclimate
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/103694
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-103694
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Non-marine ostracods
Limnocythere
Laguna Llancanelo
Arid Diagonal
South America
Paleoclimate
spellingShingle Ciencias Naturales
Non-marine ostracods
Limnocythere
Laguna Llancanelo
Arid Diagonal
South America
Paleoclimate
D’Ambrosio, D. Sabina
García, Adriana
Díaz, Analía Roxana
Chivas, Allan
Claps, María Cristina
Distribution of ostracods in west-central Argentina related to host-water chemistry and climate: implications for paleolimnology
topic_facet Ciencias Naturales
Non-marine ostracods
Limnocythere
Laguna Llancanelo
Arid Diagonal
South America
Paleoclimate
description Ecological and biogeographical studies of Neotropical non-marine ostracods are rare, although such information is needed to develop reliable paleoecological and paleoclimatic reconstructions for the region. An extensive, yet little explored South American area of paleoclimatic interest, is the arid-semiarid ecotone (Arid Diagonal) that separates arid Patagonia from subtropical/tropical northern South America, and lies at the intersection of the Pacific and Atlantic atmospheric circulation systems. This study focused on the Laguna Llancanelo basin, Argentina, a Ramsar site located within the Arid Diagonal, and was designed to build a modern dataset using ostracods (diversity, spatial distribution, seasonality, habitat preferences) and water chemistry. Cluster and multivariate analysis of the data indicated that salinity is the most significant variable segregating two ostracod groups. Limnocythere aff. staplini is the only species that develops abundant populations in the saline ephemeral Laguna Llancanelo during almost all seasons, and is accompanied by scarce Cypridopsis vidua in summer. The latter species is abundant in freshwater lotic sites, where Ilyocypris ramirezi, Herpetocypris helenae, and Cyprididae indet. are also found in large numbers. Darwinula stevensoni, Penthesilenula incae, Heterocypris incongruens, Chlamydotheca arcuata, Chlamydotheca sp., Herpetocypris helenae, and Potamocypris smaragdina prefer freshwater lentic conditions (springs), with C. arcuata and Chlamydotheca sp. found only in the Carapacho warm spring, which has a year-round constant temperature of ~20 °C. Seasonal sampling was necessary because some taxa display a highly seasonal distribution. Species that were recorded have either subtropical or Patagonian affinities, although a few taxa are endemic or common to both regions. These data can serve as modern analogues for reconstructing the late Quaternary history of the area, and to investigate the extent and position of the arid/semiarid ecotone (Arid Diagonal) during past glacial/interglacial cycles.
format Articulo
Articulo
author D’Ambrosio, D. Sabina
García, Adriana
Díaz, Analía Roxana
Chivas, Allan
Claps, María Cristina
author_facet D’Ambrosio, D. Sabina
García, Adriana
Díaz, Analía Roxana
Chivas, Allan
Claps, María Cristina
author_sort D’Ambrosio, D. Sabina
title Distribution of ostracods in west-central Argentina related to host-water chemistry and climate: implications for paleolimnology
title_short Distribution of ostracods in west-central Argentina related to host-water chemistry and climate: implications for paleolimnology
title_full Distribution of ostracods in west-central Argentina related to host-water chemistry and climate: implications for paleolimnology
title_fullStr Distribution of ostracods in west-central Argentina related to host-water chemistry and climate: implications for paleolimnology
title_full_unstemmed Distribution of ostracods in west-central Argentina related to host-water chemistry and climate: implications for paleolimnology
title_sort distribution of ostracods in west-central argentina related to host-water chemistry and climate: implications for paleolimnology
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/103694
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