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Statements

Subject Item

n2:RIV%2F60077387%3A_____%2F99%3A62000003%21RIV%2F2003%2FAV0%2FA62003%2FN

rdf:type

n14:Vysledek skos:Concept

dcterms:description

Water composition in the watershed-lake ecosystem of Pr.beta.Üilsk.theta. Lake has been strongly affected by atmospheric acidification and forest decline. In 1998,all surface tributaries were acidic (pH 3.75-4.87) with sulphate and nitrate the major anions. Tributaries draining sub-watersheds with damaged forest had increased nitrate concentrations (up to 2.4 mg l/1 NO₃-N) and the elevated losses of base cations. In-lake biochemical processes significantly influenced lake water chemistry during the summer temperature stratification, when pH, acid neutralizing capacity, K⁺, ammonium,DOC,TP,and Fe concentrations were elevated, while nitrate and ionic Al (Al_i) were lowered. Biological nitrate removal and reduction of ferric oxyhydroxides resulted in alkalinity generation and in pH increase in the hypolimnion. Under higher pH, Al_i species hydrolyzed and formed particulate Al hydroxides, which adsorbed orthophosphate. This process elevated concentrations of Water composition in the watershed-lake ecosystem of Pr.beta.Üilsk.theta. Lake has been strongly affected by atmospheric acidification and forest decline. In 1998,all surface tributaries were acidic (pH 3.75-4.87) with sulphate and nitrate the major anions. Tributaries draining sub-watersheds with damaged forest had increased nitrate concentrations (up to 2.4 mg l/1 NO₃-N) and the elevated losses of base cations. In-lake biochemical processes significantly influenced lake water chemistry during the summer temperature stratification, when pH, acid neutralizing capacity, K⁺, ammonium,DOC,TP,and Fe concentrations were elevated, while nitrate and ionic Al (Al_i) were lowered. Biological nitrate removal and reduction of ferric oxyhydroxides resulted in alkalinity generation and in pH increase in the hypolimnion. Under higher pH, Al_i species hydrolyzed and formed particulate Al hydroxides, which adsorbed orthophosphate. This process elevated concentrations of

dcterms:title

Chemistry of Prášilské Lake and its tributaries during the 1998 summer temperature stratification. Chemistry of Prášilské Lake and its tributaries during the 1998 summer temperature stratification.

skos:prefLabel

Chemistry of Prášilské Lake and its tributaries during the 1998 summer temperature stratification. Chemistry of Prášilské Lake and its tributaries during the 1998 summer temperature stratification.

skos:notation

RIV/60077387:_____/99:62000003!RIV/2003/AV0/A62003/N

n3:strany

33;48

n3:aktivita

n12:P n12:Z

n3:aktivity

P(GA206/97/0072), Z(AV0Z6017912)

n3:cisloPeriodika

N/A

n3:dodaniDat

n10:2003

n3:domaciTvurceVysledku

n4:4286731 n4:7003951 n4:7264798 n4:1269623

n3:druhVysledku

n9:J

n3:duvernostUdaju

n8:S

n3:entitaPredkladatele

n15:predkladatel

n3:idSjednocenehoVysledku

736803

n3:idVysledku

RIV/60077387:_____/99:62000003

n3:jazykVysledku

n18:eng

n3:klicovaSlova

N/A

n3:klicoveSlovo

n17:N%2FA

n3:kodStatuVydavatele

CZ - Česká republika

n3:kontrolniKodProRIV

[A604DC5838A0]

n3:nazevZdroje

Silva Gabreta

n3:obor

n7:CB

n3:pocetDomacichTvurcuVysledku

4

n3:pocetTvurcuVysledku

4

n3:pocetUcastnikuAkce

0

n3:pocetZahranicnichUcastnikuAkce

0

n3:projekt

n13:GA206%2F97%2F0072

n3:rokUplatneniVysledku

n10:1999

n3:svazekPeriodika

3

n3:tvurceVysledku

Kopáček, Jiří Hejzlar, Josef Nedoma, Jiří Porcal, Petr

n3:zamer

n16:AV0Z6017912

s:issn

1211-7420

s:numberOfPages

16