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Statements

Subject Item
n2:RIV%2F60077387%3A_____%2F03%3A62033039%21RIV%2F2004%2FAV0%2FA62004%2FN
rdf:type
skos:Concept n17:Vysledek
dcterms:description
We documented permanent presence of heterotrophic filaments in three acidified lakes (pH<5) in the Bohemian Forest. Due to acidification, crustacean zooplankton were absent in all but one lake. In terms of carbon flow, microorganisms were thus almost exclusive players in the pelagic food webs with variety of extremely long (>100 micro m) heterotrophic filaments. The filaments usually accounted for > 50 of total heterotrophic microbial biomass in the pelagic zone (medians of the total biomass: 82-108 micro g C l-1), except for anoxic bottom layers and for episodic appearance of Daphnia longispina in one lake. Seasonal filament formation was mainly induced and maintained by grazing of mixotrophic flagellates (Dinobryon spp.) on small unicellular bacteria in the absence of cladoceran filtration. The filaments were less active than unicellular suspended bacteria. Fluorescence in situ hybridisation revealed that usually <50 of total bacteria were targeted with oligonucleotide probes for Eubacteria. We documented permanent presence of heterotrophic filaments in three acidified lakes (pH<5) in the Bohemian Forest. Due to acidification, crustacean zooplankton were absent in all but one lake. In terms of carbon flow, microorganisms were thus almost exclusive players in the pelagic food webs with variety of extremely long (>100 micro m) heterotrophic filaments. The filaments usually accounted for > 50 of total heterotrophic microbial biomass in the pelagic zone (medians of the total biomass: 82-108 micro g C l-1), except for anoxic bottom layers and for episodic appearance of Daphnia longispina in one lake. Seasonal filament formation was mainly induced and maintained by grazing of mixotrophic flagellates (Dinobryon spp.) on small unicellular bacteria in the absence of cladoceran filtration. The filaments were less active than unicellular suspended bacteria. Fluorescence in situ hybridisation revealed that usually <50 of total bacteria were targeted with oligonucleotide probes for Eubacteria.
dcterms:title
Massive occurrence of heterotrophic filaments in acidified lakes: seasonal dynamics and composition. Massive occurrence of heterotrophic filaments in acidified lakes: seasonal dynamics and composition.
skos:prefLabel
Massive occurrence of heterotrophic filaments in acidified lakes: seasonal dynamics and composition. Massive occurrence of heterotrophic filaments in acidified lakes: seasonal dynamics and composition.
skos:notation
RIV/60077387:_____/03:62033039!RIV/2004/AV0/A62004/N
n4:strany
281;294
n4:aktivita
n7:Z n7:P
n4:aktivity
P(GA206/00/0063), P(GA206/03/1583), P(GA206/97/0072), P(GA206/99/0405), P(IAA6017202), P(IPP1011802), Z(AV0Z6017912)
n4:cisloPeriodika
3
n4:dodaniDat
n6:2004
n4:domaciTvurceVysledku
n11:4286731 n11:7264798 n11:6252591 n11:9040358
n4:druhVysledku
n15:J
n4:duvernostUdaju
n10:S
n4:entitaPredkladatele
n14:predkladatel
n4:idSjednocenehoVysledku
614396
n4:idVysledku
RIV/60077387:_____/03:62033039
n4:jazykVysledku
n16:eng
n4:klicovaSlova
bacterioplankton; phylogenetic identification; heterotrophic filaments
n4:klicoveSlovo
n5:bacterioplankton n5:phylogenetic%20identification n5:heterotrophic%20filaments
n4:kodStatuVydavatele
NL - Nizozemsko
n4:kontrolniKodProRIV
[8F14A1394227]
n4:nazevZdroje
FEMS Microbiology Ecology
n4:obor
n18:EE
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
7
n4:pocetUcastnikuAkce
0
n4:pocetZahranicnichUcastnikuAkce
0
n4:projekt
n12:GA206%2F99%2F0405 n12:GA206%2F97%2F0072 n12:GA206%2F03%2F1583 n12:GA206%2F00%2F0063 n12:IPP1011802 n12:IAA6017202
n4:rokUplatneniVysledku
n6:2003
n4:svazekPeriodika
46
n4:tvurceVysledku
Šimek, Karel Ráčková, P. Nedbalová, L. Kopáček, Jiří Nedoma, Jiří Kohout, L. Vrba, Jaroslav
n4:zamer
n9:AV0Z6017912
s:issn
0168-6496
s:numberOfPages
14