Diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams

Diatoms respond to toxicants in lotic systems, and they are commonly considered to be sensitive indicators in environmental safety assessment. In addition to the structural characteristics of the algal populations, recent studies have shown that endpoints such as nuclear anomalies or diatom motility...

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Autores principales: Nicolosi Gelis, María Mercedes, Mujica, Micaela Ailén, Pecile, María Agostina, Donadelli, Jorge Luis, Simonetti, Máximo A., Gómez, Nora, Cochero, Joaquín
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Naturales
Organochloride
Endosulfan
Nitzschia palea
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/151073
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-151073
record_format dspace
spelling I19-R120-10915-1510732023-04-05T04:37:06Z http://sedici.unlp.edu.ar/handle/10915/151073 issn:1090-2414 Diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams Nicolosi Gelis, María Mercedes Mujica, Micaela Ailén Pecile, María Agostina Donadelli, Jorge Luis Simonetti, Máximo A. Gómez, Nora Cochero, Joaquín 2020 2023-04-04T16:42:23Z en Ciencias Naturales Organochloride Endosulfan Nitzschia palea Diatoms respond to toxicants in lotic systems, and they are commonly considered to be sensitive indicators in environmental safety assessment. In addition to the structural characteristics of the algal populations, recent studies have shown that endpoints such as nuclear anomalies or diatom motility measures can be affected quickly by environmental changes. We sought to determine if cell density, cell size, nuclear anomalies and motility of the diatom Nitzschia palea were useful indicators of sediment quality from agricultural streams. For this purpose, we exposed cultures of the diatom to elutriates from sediments of a stream that flows through an intensive agricultural area, and measured the responses of the populations for 7 days in laboratory tests. The bioassays showed that motility measures in Nitzschia palea and the condition of their nuclear membranes rapidly reflected the effects of sediment quality after only 48 h of exposure; mean cell density and length were affected by day 7. The sediment elutriates affected cell movements by shortening the total path length and decreasing cell velocity; they also increased the number of cells with nuclear membrane breakage. Our results from these bioassays show that diatom motility measurements and the condition of the nuclei might be indicators that respond faster to impacts than the traditional structural parameters, such as cell density, specific composition of the assemblage or diversity metrics of the algal communities more often used in biomonitoring. Instituto de Limnología "Dr. Raúl A. Ringuelet" Articulo Articulo http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Organochloride
Endosulfan
Nitzschia palea
spellingShingle Ciencias Naturales
Organochloride
Endosulfan
Nitzschia palea
Nicolosi Gelis, María Mercedes
Mujica, Micaela Ailén
Pecile, María Agostina
Donadelli, Jorge Luis
Simonetti, Máximo A.
Gómez, Nora
Cochero, Joaquín
Diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams
topic_facet Ciencias Naturales
Organochloride
Endosulfan
Nitzschia palea
description Diatoms respond to toxicants in lotic systems, and they are commonly considered to be sensitive indicators in environmental safety assessment. In addition to the structural characteristics of the algal populations, recent studies have shown that endpoints such as nuclear anomalies or diatom motility measures can be affected quickly by environmental changes. We sought to determine if cell density, cell size, nuclear anomalies and motility of the diatom Nitzschia palea were useful indicators of sediment quality from agricultural streams. For this purpose, we exposed cultures of the diatom to elutriates from sediments of a stream that flows through an intensive agricultural area, and measured the responses of the populations for 7 days in laboratory tests. The bioassays showed that motility measures in Nitzschia palea and the condition of their nuclear membranes rapidly reflected the effects of sediment quality after only 48 h of exposure; mean cell density and length were affected by day 7. The sediment elutriates affected cell movements by shortening the total path length and decreasing cell velocity; they also increased the number of cells with nuclear membrane breakage. Our results from these bioassays show that diatom motility measurements and the condition of the nuclei might be indicators that respond faster to impacts than the traditional structural parameters, such as cell density, specific composition of the assemblage or diversity metrics of the algal communities more often used in biomonitoring.
format Articulo
Articulo
author Nicolosi Gelis, María Mercedes
Mujica, Micaela Ailén
Pecile, María Agostina
Donadelli, Jorge Luis
Simonetti, Máximo A.
Gómez, Nora
Cochero, Joaquín
author_facet Nicolosi Gelis, María Mercedes
Mujica, Micaela Ailén
Pecile, María Agostina
Donadelli, Jorge Luis
Simonetti, Máximo A.
Gómez, Nora
Cochero, Joaquín
author_sort Nicolosi Gelis, María Mercedes
title Diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams
title_short Diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams
title_full Diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams
title_fullStr Diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams
title_full_unstemmed Diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams
title_sort diatom motility and nuclear alterations are affected by sediment elutriates of agricultural streams
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/151073
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