Synergistic effects of nutrients and light favor Nostocales over non-heterocystous cyanobacteria

Blooms of Nostocales (Cyanobacteria) are thought to be invading subtropical and temperate water bodies. According to nutrient stoichiometry and physiological differences between cyanobacterial groups, the replacement of non-heterocystous species by Nostocales is favored when dissolved inorganic nitr...

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Detalles Bibliográficos
Autores principales: Aguilera, Anabella, Aubriot, Luis, Echenique, Ricardo Omar, Salerno, Graciela Lidia, Brena, Beatriz M., Pírez, Macarena, Bonilla, Sylvia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Naturales
Biología
Cyanobacterial blooms
Eutrophication
Saxitoxin
Invasive species
Nutrients
Species diversity
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/139390
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-139390
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
Biología
Cyanobacterial blooms
Eutrophication
Saxitoxin
Invasive species
Nutrients
Species diversity
spellingShingle Ciencias Naturales
Biología
Cyanobacterial blooms
Eutrophication
Saxitoxin
Invasive species
Nutrients
Species diversity
Aguilera, Anabella
Aubriot, Luis
Echenique, Ricardo Omar
Salerno, Graciela Lidia
Brena, Beatriz M.
Pírez, Macarena
Bonilla, Sylvia
Synergistic effects of nutrients and light favor Nostocales over non-heterocystous cyanobacteria
topic_facet Ciencias Naturales
Biología
Cyanobacterial blooms
Eutrophication
Saxitoxin
Invasive species
Nutrients
Species diversity
description Blooms of Nostocales (Cyanobacteria) are thought to be invading subtropical and temperate water bodies. According to nutrient stoichiometry and physiological differences between cyanobacterial groups, the replacement of non-heterocystous species by Nostocales is favored when dissolved inorganic nitrogen decreases. However, some studies have shown different trends. We used laboratory bioassays to evaluate the concomitant effects of light and nutrient enrichment on phytoplankton assemblages dominated by non-heterocystous filamentous cyanobacteria. Three nutrient conditions (no addition, addition of phosphate, and addition of nitrate and phosphate) and two light intensities (40 and 80 µmol photon m−2 s−1) were assayed. Nostocales replaced or co-dominated with non-heterocystous species in all treatments by the end of the study. The shift in community composition towards Nostocales dominance led to an increase in species richness, which suggests that species with different eco-physiological traits may have differential impacts on diversity. The highest saxitoxin concentrations were measured in no addition treatments, which could link production to nutritional stress. Nostocales featured high phenotypic plasticity in terms of changes in average trichome volume and growth rates. These results help to have a better understanding of the conditions under which Nostocales predominance can occur.
format Articulo
Articulo
author Aguilera, Anabella
Aubriot, Luis
Echenique, Ricardo Omar
Salerno, Graciela Lidia
Brena, Beatriz M.
Pírez, Macarena
Bonilla, Sylvia
author_facet Aguilera, Anabella
Aubriot, Luis
Echenique, Ricardo Omar
Salerno, Graciela Lidia
Brena, Beatriz M.
Pírez, Macarena
Bonilla, Sylvia
author_sort Aguilera, Anabella
title Synergistic effects of nutrients and light favor Nostocales over non-heterocystous cyanobacteria
title_short Synergistic effects of nutrients and light favor Nostocales over non-heterocystous cyanobacteria
title_full Synergistic effects of nutrients and light favor Nostocales over non-heterocystous cyanobacteria
title_fullStr Synergistic effects of nutrients and light favor Nostocales over non-heterocystous cyanobacteria
title_full_unstemmed Synergistic effects of nutrients and light favor Nostocales over non-heterocystous cyanobacteria
title_sort synergistic effects of nutrients and light favor nostocales over non-heterocystous cyanobacteria
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/139390
work_keys_str_mv AT aguileraanabella synergisticeffectsofnutrientsandlightfavornostocalesovernonheterocystouscyanobacteria
AT aubriotluis synergisticeffectsofnutrientsandlightfavornostocalesovernonheterocystouscyanobacteria
AT echeniquericardoomar synergisticeffectsofnutrientsandlightfavornostocalesovernonheterocystouscyanobacteria
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AT pirezmacarena synergisticeffectsofnutrientsandlightfavornostocalesovernonheterocystouscyanobacteria
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bdutipo_str Repositorios
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