Annelida (Oligochaeta and Aphanoneura) from the natural reserve of isla martín garcía (upper Río de la plata estuary, Argentina): biodiversity and response to environmental variables

The Island of Martín García located in the Upper Río de la Plata, to the south of the Uruguay River-is an outcropping of the crystalline basement. Fourteen sampling sites were selected, five along the littoral section of the island and nine in inland ponds. Four major environmental variables were me...

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Detalles Bibliográficos
Autor principal: César, Inés Irma
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Zoología
Annelida
Biodiversity
CCA
Ecology
Martín garcía Island
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85171
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85171
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Annelida
Biodiversity
CCA
Ecology
Martín garcía Island
spellingShingle Zoología
Annelida
Biodiversity
CCA
Ecology
Martín garcía Island
César, Inés Irma
Annelida (Oligochaeta and Aphanoneura) from the natural reserve of isla martín garcía (upper Río de la plata estuary, Argentina): biodiversity and response to environmental variables
topic_facet Zoología
Annelida
Biodiversity
CCA
Ecology
Martín garcía Island
description The Island of Martín García located in the Upper Río de la Plata, to the south of the Uruguay River-is an outcropping of the crystalline basement. Fourteen sampling sites were selected, five along the littoral section of the island and nine in inland ponds. Four major environmental variables were measured: water temperature, dissolved oxygen, electrical conductivity, and pH. A total of 34 species of Oligochaeta and Aphanoneura were found, 30 belonging to Naididae plus one species each of the Narapidae, Lumbricidae, Enchytraeidae, and Aeolosomatidae. The thirteen most frequent species were: A. leydigi (30%), N. bonettoi (13%), L. hoffmeisteri (11%), N. variabilis (10%), S. trivandrana (6.5%), A. pigueti (5.6%), D. sawayai (4.5%), D. digitata (3.5%), C. diastrophus (2.7%), A. costatus (2.5%), P. longiseta (2.0%), Enchytraeidae (1.5%), and A. p. paraguayensis (1.4%). UPGMA clustering of species based on their occurrence in different ecological conditions revealed two main species groups. Canonic-correspondence analysis (CCA) was conducted with the 15 most frequent and abundant species in the 9 sampling sites and the 4 environmental variables. Results from the CCA revealed that the order of fluctuation of the environmental variables during the sampling period was, from the greatest to the least: dissolved oxygen, conductivity, pH, and water temperature. Approximately 97.6% of the correlations between species and environmental variables were expressed on axis 1 of the ordination diagram. Species richness correlated with the four environmental variables in the following order, from the weakest to the strongest: water temperature, pH, electrical conductivity, and dissolved oxygen.
format Articulo
Articulo
author César, Inés Irma
author_facet César, Inés Irma
author_sort César, Inés Irma
title Annelida (Oligochaeta and Aphanoneura) from the natural reserve of isla martín garcía (upper Río de la plata estuary, Argentina): biodiversity and response to environmental variables
title_short Annelida (Oligochaeta and Aphanoneura) from the natural reserve of isla martín garcía (upper Río de la plata estuary, Argentina): biodiversity and response to environmental variables
title_full Annelida (Oligochaeta and Aphanoneura) from the natural reserve of isla martín garcía (upper Río de la plata estuary, Argentina): biodiversity and response to environmental variables
title_fullStr Annelida (Oligochaeta and Aphanoneura) from the natural reserve of isla martín garcía (upper Río de la plata estuary, Argentina): biodiversity and response to environmental variables
title_full_unstemmed Annelida (Oligochaeta and Aphanoneura) from the natural reserve of isla martín garcía (upper Río de la plata estuary, Argentina): biodiversity and response to environmental variables
title_sort annelida (oligochaeta and aphanoneura) from the natural reserve of isla martín garcía (upper río de la plata estuary, argentina): biodiversity and response to environmental variables
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/85171
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