The Use of Littoral Benthic Macroinvertebrates of the Martín Garcia Island Nature Reserve as Indicators of Water Quality

At Martín García Island—a Natural Reserve located at the confluence of the Paraná and Uruguay rivers—we used benthic-macroinvertebrate biotic indices to elucidate the structure and community parameters of the littoral benthos and their response to environmental variables and to evaluate the island&#...

Descripción completa

Detalles Bibliográficos
Autores principales: César, Inés Irma, Martin, Stella Maris, Colla, María Florencia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Biología
Benthos
Macroinvertebrates
Water quality
Martín García Island
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131407
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131407
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Biología
Benthos
Macroinvertebrates
Water quality
Martín García Island
spellingShingle Biología
Benthos
Macroinvertebrates
Water quality
Martín García Island
César, Inés Irma
Martin, Stella Maris
Colla, María Florencia
The Use of Littoral Benthic Macroinvertebrates of the Martín Garcia Island Nature Reserve as Indicators of Water Quality
topic_facet Biología
Benthos
Macroinvertebrates
Water quality
Martín García Island
description At Martín García Island—a Natural Reserve located at the confluence of the Paraná and Uruguay rivers—we used benthic-macroinvertebrate biotic indices to elucidate the structure and community parameters of the littoral benthos and their response to environmental variables and to evaluate the island's coastal water quality. Seasonal campaigns were carried out (March/1995-March/1996) at eight sites of the island's littoral sites, selected according to the substrate characteristics (fine sands, sandy-silty, reedbed, and silty with great hydrophyte development). From the sites with a soft substrate, triplicate samples were extracted using a 225-cm2 Ekman manual dredge. The relative abundances of 71 taxa were measured: Nematoda, Turbelaria, Oligochaeta (23 sps.), Mollusca (21 sps.), Crustacea (11 sps.), Insecta (12 families), and Tardigrada. Macroinvertebrate density: 15-58,800 ind.m-2. Analysis of variance revealed significant differences between the average annual macroinvertebrate-population densities among the five sites (F: 3.059; p<0.05). Site 7 exhibited the highest density at 38,700±19,000 ind.m-2 Community parameters: diversity (H'; 0.77-2.16 bits); equitability (J; 0.16-1.02), and species richness (S; 3-29). Canonical-correspondence analysis indicated the environmental variables experiencing the greatest fluctuation to be: dissolved-oxygen concentration, pH, temperature, and conductivity. The results of this analysis suggest that macroinvertebrate-species distribution involves the physicochemical conditions of the water. Of the correlation between species and environmental variables, 95.5% were distributed on the canonical-correspondence ordering diagram's Axis 1. Functional feeding groups: In all sites and seasons, the gathering collectors predominated, followed by the scrapers, filtering collectors, shredders, and predators. Macroinvertebrate Index of Pampean-Rivers: values generally ranged from weak to weak-to-very-weak to zero pollution, but there was a high degree of pollution (2.4 and 1.5) in the spring of 1995.
format Articulo
Articulo
author César, Inés Irma
Martin, Stella Maris
Colla, María Florencia
author_facet César, Inés Irma
Martin, Stella Maris
Colla, María Florencia
author_sort César, Inés Irma
title The Use of Littoral Benthic Macroinvertebrates of the Martín Garcia Island Nature Reserve as Indicators of Water Quality
title_short The Use of Littoral Benthic Macroinvertebrates of the Martín Garcia Island Nature Reserve as Indicators of Water Quality
title_full The Use of Littoral Benthic Macroinvertebrates of the Martín Garcia Island Nature Reserve as Indicators of Water Quality
title_fullStr The Use of Littoral Benthic Macroinvertebrates of the Martín Garcia Island Nature Reserve as Indicators of Water Quality
title_full_unstemmed The Use of Littoral Benthic Macroinvertebrates of the Martín Garcia Island Nature Reserve as Indicators of Water Quality
title_sort use of littoral benthic macroinvertebrates of the martín garcia island nature reserve as indicators of water quality
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/131407
work_keys_str_mv AT cesarinesirma theuseoflittoralbenthicmacroinvertebratesofthemartingarciaislandnaturereserveasindicatorsofwaterquality
AT martinstellamaris theuseoflittoralbenthicmacroinvertebratesofthemartingarciaislandnaturereserveasindicatorsofwaterquality
AT collamariaflorencia theuseoflittoralbenthicmacroinvertebratesofthemartingarciaislandnaturereserveasindicatorsofwaterquality
AT cesarinesirma useoflittoralbenthicmacroinvertebratesofthemartingarciaislandnaturereserveasindicatorsofwaterquality
AT martinstellamaris useoflittoralbenthicmacroinvertebratesofthemartingarciaislandnaturereserveasindicatorsofwaterquality
AT collamariaflorencia useoflittoralbenthicmacroinvertebratesofthemartingarciaislandnaturereserveasindicatorsofwaterquality
bdutipo_str Repositorios
_version_ 1764820453731336192

Ejemplares similares