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Statements

Subject Item
n2:RIV%2F60077344%3A_____%2F14%3A00433648%21RIV15-GA0-60077344
rdf:type
skos:Concept n18:Vysledek
dcterms:description
Despite the global importance of phytoplankton primary production, the ecological role of cell death as an important loss process in phytoplankton is poorly understood. To assess the significance of cell death in phytoplankton, we studied cell viability of dominant species in the canyon-shaped eutrophic Římov Reservoir (Czech Republic) at weekly and biweekly intervals from April to October 2011. Surface samples were taken from the lacustrine zone (near the dam, low nutrient level) and transition zone (near the river inflow, high nutrient level) of the reservoir. Moreover, samples from euphotic depth (1% of surface irradiance) were taken from the lacustrine zone. We used the membrane-impermeant nucleic acid dye SYTOX Green to examine seasonal and spatial differences in phytoplankton cell viability. Three species (diatoms Asterionella formosa, Fragilaria crotonensis, and cyanobacterium Aphanizomenon flos-aquae) were studied in detail. There was no difference in Asterionella cell viability among sampling sites. In the lacustrine zone, Fragilaria and Aphanizomenon exhibited lower viability than in the transition zone. In addition, Aphanizomenon viability was significantly lower at the euphotic depth. Nutrient levels were revealed as a factor influencing Fragilaria viability, while light availability was more important for Aphanizomenon. Our results evidenced that the importance of cell death, in particular phytoplankton taxa, varies both spatially and temporally. Moreover, our study indicates that coexisting taxa may differ in their capacity to cope with different environmental stressors. Despite the global importance of phytoplankton primary production, the ecological role of cell death as an important loss process in phytoplankton is poorly understood. To assess the significance of cell death in phytoplankton, we studied cell viability of dominant species in the canyon-shaped eutrophic Římov Reservoir (Czech Republic) at weekly and biweekly intervals from April to October 2011. Surface samples were taken from the lacustrine zone (near the dam, low nutrient level) and transition zone (near the river inflow, high nutrient level) of the reservoir. Moreover, samples from euphotic depth (1% of surface irradiance) were taken from the lacustrine zone. We used the membrane-impermeant nucleic acid dye SYTOX Green to examine seasonal and spatial differences in phytoplankton cell viability. Three species (diatoms Asterionella formosa, Fragilaria crotonensis, and cyanobacterium Aphanizomenon flos-aquae) were studied in detail. There was no difference in Asterionella cell viability among sampling sites. In the lacustrine zone, Fragilaria and Aphanizomenon exhibited lower viability than in the transition zone. In addition, Aphanizomenon viability was significantly lower at the euphotic depth. Nutrient levels were revealed as a factor influencing Fragilaria viability, while light availability was more important for Aphanizomenon. Our results evidenced that the importance of cell death, in particular phytoplankton taxa, varies both spatially and temporally. Moreover, our study indicates that coexisting taxa may differ in their capacity to cope with different environmental stressors.
dcterms:title
Spatio-temporal study of phytoplankton cell viability in a eutrophic reservoir using SYTOX Green nucleic acid stain Spatio-temporal study of phytoplankton cell viability in a eutrophic reservoir using SYTOX Green nucleic acid stain
skos:prefLabel
Spatio-temporal study of phytoplankton cell viability in a eutrophic reservoir using SYTOX Green nucleic acid stain Spatio-temporal study of phytoplankton cell viability in a eutrophic reservoir using SYTOX Green nucleic acid stain
skos:notation
RIV/60077344:_____/14:00433648!RIV15-GA0-60077344
n3:aktivita
n13:I n13:S n13:P
n3:aktivity
I, P(GAP504/11/2177), P(GAP504/11/2182), S
n3:cisloPeriodika
1
n3:dodaniDat
n7:2015
n3:domaciTvurceVysledku
n4:9497129 n4:7264798 n4:7551452
n3:druhVysledku
n10:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
46376
n3:idVysledku
RIV/60077344:_____/14:00433648
n3:jazykVysledku
n11:eng
n3:klicovaSlova
phytoplankton; reservoir; cell death; SYTOX Green
n3:klicoveSlovo
n12:cell%20death n12:SYTOX%20Green n12:reservoir n12:phytoplankton
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[94658623AFF5]
n3:nazevZdroje
Hydrobiologia
n3:obor
n5:DA
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n8:GAP504%2F11%2F2182 n8:GAP504%2F11%2F2177
n3:rokUplatneniVysledku
n7:2014
n3:svazekPeriodika
740
n3:tvurceVysledku
Nedoma, Jiří Rychtecký, Pavel Znachor, Petr
n3:wos
000342491300014
s:issn
0018-8158
s:numberOfPages
13
n16:doi
10.1007/s10750-014-1952-z