Cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.

The importance of nitrogen (N) versus phosphorus (P) in explaining total cyanobacterial biovolume, the biovolume of specific cyanobacterial taxa, and the incidence of cyanotoxins was determined for 102 north German lakes, using methods to separate the effects of joint variation in N and P concentrat...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Andrew M Dolman, Jacqueline Rücker, Frances R Pick, Jutta Fastner, Thomas Rohrlack, Ute Mischke, Claudia Wiedner
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/68060b27644346ad81854f4ea777e399
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:68060b27644346ad81854f4ea777e399
record_format	dspace
spelling	oai:doaj.org-article:68060b27644346ad81854f4ea777e3992021-11-18T07:15:23ZCyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.1932-620310.1371/journal.pone.0038757https://doaj.org/article/68060b27644346ad81854f4ea777e3992012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22719937/?tool=EBIhttps://doaj.org/toc/1932-6203The importance of nitrogen (N) versus phosphorus (P) in explaining total cyanobacterial biovolume, the biovolume of specific cyanobacterial taxa, and the incidence of cyanotoxins was determined for 102 north German lakes, using methods to separate the effects of joint variation in N and P concentration from those of differential variation in N versus P. While the positive relationship between total cyanobacteria biovolume and P concentration disappeared at high P concentrations, cyanobacteria biovolume increased continually with N concentration, indicating potential N limitation in highly P enriched lakes. The biovolumes of all cyanobacterial taxa were higher in lakes with above average joint NP concentrations, although the relative biovolumes of some Nostocales were higher in less enriched lakes. Taxa were found to have diverse responses to differential N versus P concentration, and the differences between taxa were not consistent with the hypothesis that potentially N(2)-fixing Nostocales taxa would be favoured in low N relative to P conditions. In particular Aphanizomenon gracile and the subtropical invasive species Cylindrospermopsis raciborskii often reached their highest biovolumes in lakes with high nitrogen relative to phosphorus concentration. Concentrations of all cyanotoxin groups increased with increasing TP and TN, congruent with the biovolumes of their likely producers. Microcystin concentration was strongly correlated with the biovolume of Planktothrix agardhii but concentrations of anatoxin, cylindrospermopsin and paralytic shellfish poison were not strongly related to any individual taxa. Cyanobacteria should not be treated as a single group when considering the potential effects of changes in nutrient loading on phytoplankton community structure and neither should the N(2)-fixing Nostocales. This is of particular importance when considering the occurrence of cyanotoxins, as the two most abundant potentially toxin producing Nostocales in our study were found in lakes with high N relative to P enrichment.Andrew M DolmanJacqueline RückerFrances R PickJutta FastnerThomas RohrlackUte MischkeClaudia WiednerPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 6, p e38757 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andrew M Dolman Jacqueline Rücker Frances R Pick Jutta Fastner Thomas Rohrlack Ute Mischke Claudia Wiedner Cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.
description	The importance of nitrogen (N) versus phosphorus (P) in explaining total cyanobacterial biovolume, the biovolume of specific cyanobacterial taxa, and the incidence of cyanotoxins was determined for 102 north German lakes, using methods to separate the effects of joint variation in N and P concentration from those of differential variation in N versus P. While the positive relationship between total cyanobacteria biovolume and P concentration disappeared at high P concentrations, cyanobacteria biovolume increased continually with N concentration, indicating potential N limitation in highly P enriched lakes. The biovolumes of all cyanobacterial taxa were higher in lakes with above average joint NP concentrations, although the relative biovolumes of some Nostocales were higher in less enriched lakes. Taxa were found to have diverse responses to differential N versus P concentration, and the differences between taxa were not consistent with the hypothesis that potentially N(2)-fixing Nostocales taxa would be favoured in low N relative to P conditions. In particular Aphanizomenon gracile and the subtropical invasive species Cylindrospermopsis raciborskii often reached their highest biovolumes in lakes with high nitrogen relative to phosphorus concentration. Concentrations of all cyanotoxin groups increased with increasing TP and TN, congruent with the biovolumes of their likely producers. Microcystin concentration was strongly correlated with the biovolume of Planktothrix agardhii but concentrations of anatoxin, cylindrospermopsin and paralytic shellfish poison were not strongly related to any individual taxa. Cyanobacteria should not be treated as a single group when considering the potential effects of changes in nutrient loading on phytoplankton community structure and neither should the N(2)-fixing Nostocales. This is of particular importance when considering the occurrence of cyanotoxins, as the two most abundant potentially toxin producing Nostocales in our study were found in lakes with high N relative to P enrichment.
format	article
author	Andrew M Dolman Jacqueline Rücker Frances R Pick Jutta Fastner Thomas Rohrlack Ute Mischke Claudia Wiedner
author_facet	Andrew M Dolman Jacqueline Rücker Frances R Pick Jutta Fastner Thomas Rohrlack Ute Mischke Claudia Wiedner
author_sort	Andrew M Dolman
title	Cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.
title_short	Cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.
title_full	Cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.
title_fullStr	Cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.
title_full_unstemmed	Cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.
title_sort	cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/68060b27644346ad81854f4ea777e399
work_keys_str_mv	AT andrewmdolman cyanobacteriaandcyanotoxinstheinfluenceofnitrogenversusphosphorus AT jacquelinerucker cyanobacteriaandcyanotoxinstheinfluenceofnitrogenversusphosphorus AT francesrpick cyanobacteriaandcyanotoxinstheinfluenceofnitrogenversusphosphorus AT juttafastner cyanobacteriaandcyanotoxinstheinfluenceofnitrogenversusphosphorus AT thomasrohrlack cyanobacteriaandcyanotoxinstheinfluenceofnitrogenversusphosphorus AT utemischke cyanobacteriaandcyanotoxinstheinfluenceofnitrogenversusphosphorus AT claudiawiedner cyanobacteriaandcyanotoxinstheinfluenceofnitrogenversusphosphorus
_version_	1718423729790255104

Cyanobacteria and cyanotoxins: the influence of nitrogen versus phosphorus.

Ejemplares similares