Phytoplanktonic associations as indicators of zinc pollution

In order to study the response of native phytoplanktonic communities to different zinc concentrations (2.5, 10, 20-25 and 40-50 mg·L-1), four bioassays in vitro were carried out. They were conducted in autumn, winter, spring and summer under controlled conditions during a month and the samplings wer...

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Publicado:	1998
Materias:	dissolved heavy metals Freshwater Multispecific algal bioassay Phytoplankton Pollution Reconquista River (Argentina) South America Zinc bioindicator phytoplankton pollution monitoring zinc Algae Climate change Chlorella vulgaris Chrysophyceae Cyanophyceae Dinophyceae Euglenophyceae Phytoplanktonic associations Tribophyceae Zinc pollution Zygophyceae Bioassay
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09927158_v11_n3_p315_Loez http://hdl.handle.net/20.500.12110/paper_09927158_v11_n3_p315_Loez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09927158_v11_n3_p315_Loez
record_format	dspace
spelling	paper:paper_09927158_v11_n3_p315_Loez2023-06-08T15:59:15Z Phytoplanktonic associations as indicators of zinc pollution dissolved heavy metals Freshwater Multispecific algal bioassay Phytoplankton Pollution Reconquista River (Argentina) South America Zinc bioindicator phytoplankton pollution monitoring zinc Algae Climate change Pollution Zinc Chlorella vulgaris Chrysophyceae Cyanophyceae Dinophyceae Euglenophyceae Phytoplanktonic associations Tribophyceae Zinc pollution Zygophyceae Bioassay In order to study the response of native phytoplanktonic communities to different zinc concentrations (2.5, 10, 20-25 and 40-50 mg·L-1), four bioassays in vitro were carried out. They were conducted in autumn, winter, spring and summer under controlled conditions during a month and the samplings were performed each 2-3 days. The algal responses were variable according to the season and zinc-concentration, species, inoculum density and temperature dependent. 2.5 and 10 mg·L-1 of zinc in the test medium caused a stimulatory effect on the growth rate of certain diatoms; with 20-25 mg·L-1 of zinc the development of Chlorella vulgaris (Chlorophyceae) was stimulated, and with 40-50 mg·L-1 of zinc it was generally found important mortality rates except for Chlorella vulgaris and for some tolerant diatom species: Cyclotella meneghiniana, Gomphonema parvulum, Navicula sp., Nitzschia palea, Nitzschia sp., Pinnularia biceps, Synedra acus and Synedra ulna var. amphirrhynchus. The Cyanophyceae, Euglenophyceae, Tribophyceae, Chrysophyceae, Zygophyceae and Dinophyceae were particularly sensitive to zinc. In presence of abundant inoculums, the sensivity to zinc was observed up to 25 mg·L-1 (autumn-20°C, spring-20°C and summer-25°C) while in presence of smaller inoculums the sensivity manifested up to 10 mg·L-1 (winter-15°C). In general, as zinc concentration increased, Chlorella vulgaris gradually became the dominant taxon and thus, a decrease in the specific diversity of the assayed algal system made of zinc-tolerant species was observed. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09927158_v11_n3_p315_Loez http://hdl.handle.net/20.500.12110/paper_09927158_v11_n3_p315_Loez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	dissolved heavy metals Freshwater Multispecific algal bioassay Phytoplankton Pollution Reconquista River (Argentina) South America Zinc bioindicator phytoplankton pollution monitoring zinc Algae Climate change Pollution Zinc Chlorella vulgaris Chrysophyceae Cyanophyceae Dinophyceae Euglenophyceae Phytoplanktonic associations Tribophyceae Zinc pollution Zygophyceae Bioassay
spellingShingle	dissolved heavy metals Freshwater Multispecific algal bioassay Phytoplankton Pollution Reconquista River (Argentina) South America Zinc bioindicator phytoplankton pollution monitoring zinc Algae Climate change Pollution Zinc Chlorella vulgaris Chrysophyceae Cyanophyceae Dinophyceae Euglenophyceae Phytoplanktonic associations Tribophyceae Zinc pollution Zygophyceae Bioassay Phytoplanktonic associations as indicators of zinc pollution
topic_facet	dissolved heavy metals Freshwater Multispecific algal bioassay Phytoplankton Pollution Reconquista River (Argentina) South America Zinc bioindicator phytoplankton pollution monitoring zinc Algae Climate change Pollution Zinc Chlorella vulgaris Chrysophyceae Cyanophyceae Dinophyceae Euglenophyceae Phytoplanktonic associations Tribophyceae Zinc pollution Zygophyceae Bioassay
description	In order to study the response of native phytoplanktonic communities to different zinc concentrations (2.5, 10, 20-25 and 40-50 mg·L-1), four bioassays in vitro were carried out. They were conducted in autumn, winter, spring and summer under controlled conditions during a month and the samplings were performed each 2-3 days. The algal responses were variable according to the season and zinc-concentration, species, inoculum density and temperature dependent. 2.5 and 10 mg·L-1 of zinc in the test medium caused a stimulatory effect on the growth rate of certain diatoms; with 20-25 mg·L-1 of zinc the development of Chlorella vulgaris (Chlorophyceae) was stimulated, and with 40-50 mg·L-1 of zinc it was generally found important mortality rates except for Chlorella vulgaris and for some tolerant diatom species: Cyclotella meneghiniana, Gomphonema parvulum, Navicula sp., Nitzschia palea, Nitzschia sp., Pinnularia biceps, Synedra acus and Synedra ulna var. amphirrhynchus. The Cyanophyceae, Euglenophyceae, Tribophyceae, Chrysophyceae, Zygophyceae and Dinophyceae were particularly sensitive to zinc. In presence of abundant inoculums, the sensivity to zinc was observed up to 25 mg·L-1 (autumn-20°C, spring-20°C and summer-25°C) while in presence of smaller inoculums the sensivity manifested up to 10 mg·L-1 (winter-15°C). In general, as zinc concentration increased, Chlorella vulgaris gradually became the dominant taxon and thus, a decrease in the specific diversity of the assayed algal system made of zinc-tolerant species was observed.
title	Phytoplanktonic associations as indicators of zinc pollution
title_short	Phytoplanktonic associations as indicators of zinc pollution
title_full	Phytoplanktonic associations as indicators of zinc pollution
title_fullStr	Phytoplanktonic associations as indicators of zinc pollution
title_full_unstemmed	Phytoplanktonic associations as indicators of zinc pollution
title_sort	phytoplanktonic associations as indicators of zinc pollution
publishDate	1998
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09927158_v11_n3_p315_Loez http://hdl.handle.net/20.500.12110/paper_09927158_v11_n3_p315_Loez
_version_	1768544967550042112

Phytoplanktonic associations as indicators of zinc pollution

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