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Statements

Subject Item
n2:RIV%2F60076658%3A12310%2F09%3A00010398%21RIV10-MSM-12310___
rdf:type
n9:Vysledek skos:Concept
dcterms:description
In order to determine the impact of nutrient enrichment on phosphorus (P) limited wetlands, we established experimental P additions in marshes throughout northern Belize. P significantly increased macrophyte primary production, which led to the rapid elimination of cyanobacterial mats. The replacement of cyanobacterial mats by macrophytes constrained autotrophic nitrogen (N) fixation, increased the quantity, and changed the quality of organic matter input to the sediments. We predicted that the activity of sediment heterotrophic N fixers will be impacted by these alterations in carbon input. We used the acetylene reduction technique to measure potential (glucose amended) nitrogenase activity (NA) in sediments from controls and treatment plots that have been P enriched for four years and dominated either by Eleocharis cellulosa, or Typha domingensis for two years. NA in P-enriched plots was 2-3 orders of magnitude higher than NA in controls. NA was positively correlated with the soil reactive P, both t In order to determine the impact of nutrient enrichment on phosphorus (P) limited wetlands, we established experimental P additions in marshes throughout northern Belize. P significantly increased macrophyte primary production, which led to the rapid elimination of cyanobacterial mats. The replacement of cyanobacterial mats by macrophytes constrained autotrophic nitrogen (N) fixation, increased the quantity, and changed the quality of organic matter input to the sediments. We predicted that the activity of sediment heterotrophic N fixers will be impacted by these alterations in carbon input. We used the acetylene reduction technique to measure potential (glucose amended) nitrogenase activity (NA) in sediments from controls and treatment plots that have been P enriched for four years and dominated either by Eleocharis cellulosa, or Typha domingensis for two years. NA in P-enriched plots was 2-3 orders of magnitude higher than NA in controls. NA was positively correlated with the soil reactive P, both t
dcterms:title
Heterotrophic nitrogen fixation in oligotrophic tropical marshes: changes after phosphorus addition Heterotrophic nitrogen fixation in oligotrophic tropical marshes: changes after phosphorus addition
skos:prefLabel
Heterotrophic nitrogen fixation in oligotrophic tropical marshes: changes after phosphorus addition Heterotrophic nitrogen fixation in oligotrophic tropical marshes: changes after phosphorus addition
skos:notation
RIV/60076658:12310/09:00010398!RIV10-MSM-12310___
n3:aktivita
n14:P n14:Z
n3:aktivity
P(ME 912), Z(MSM6007665801)
n3:cisloPeriodika
1
n3:dodaniDat
n4:2010
n3:domaciTvurceVysledku
n19:9014632
n3:druhVysledku
n10:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
317057
n3:idVysledku
RIV/60076658:12310/09:00010398
n3:jazykVysledku
n6:eng
n3:klicovaSlova
Heterotrophic nitrogen fixation; Typha; Eleocharis; Cyanobacteria; Phosphorus; Salinity
n3:klicoveSlovo
n7:Heterotrophic%20nitrogen%20fixation n7:Typha n7:Phosphorus n7:Salinity n7:Cyanobacteria n7:Eleocharis
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[110501676DEF]
n3:nazevZdroje
Hydrobiologia
n3:obor
n18:EH
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:projekt
n13:ME%20912
n3:rokUplatneniVysledku
n4:2009
n3:svazekPeriodika
627
n3:tvurceVysledku
Snyder, Jenise Šantrůčková, Hana Černá, Barbora Rejmánková, Eliška
n3:wos
000266007800005
n3:zamer
n12:MSM6007665801
s:issn
0018-8158
s:numberOfPages
11
n11:organizacniJednotka
12310