Delta15N jako indicator fixace dusíku cyanobakteriálními sinicemi v tropických mokřadech

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077387%3A_____%2F04%3A00025994" target="_blank" >RIV/60077387:_____/04:00025994 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Delta15 N as an indicator of N2-fixation by cyanobacterial mats in tropical marshes

Popis výsledku v původním jazyce

Cyanobacterial mats (CBM) in limestone-based tropical regions of the Caribbean contribute to the primary production, are crucial in marl formation and are known to fix di-nitrogen. Nitrogen fixation ranges from low (< 5 nmol C2H4 cm-2 h-1) to high (12 to20 nmol C2H4 cm-2 h-1). A linear increase of nitrogenase activity with increasing amount of Stigonematales was proved. Nitrogen-fixing cyanobacteria have delta 15N usually close to 0 ppt. We measured N2-fixation at 12 ? 14 different locations parallel with measurement of relevant environmental characteristics and the natural abundance of delta 15N (-1.99 to 11.44 >). Path analysis of the dependence of delta 15N on N2-fixation, NO3-N, and NH4-N in water indicated that the effect of N2-fixation was moreimportant than the effect of nitrogen amount/form in water. The evidence we present suggests that delta 15N can be used as an indicator of the level of N2-fixation by CBM.

Název v anglickém jazyce

Delta15 N as an indicator of N2-fixation by cyanobacterial mats in tropical marshes

Popis výsledku anglicky

Cyanobacterial mats (CBM) in limestone-based tropical regions of the Caribbean contribute to the primary production, are crucial in marl formation and are known to fix di-nitrogen. Nitrogen fixation ranges from low (< 5 nmol C2H4 cm-2 h-1) to high (12 to20 nmol C2H4 cm-2 h-1). A linear increase of nitrogenase activity with increasing amount of Stigonematales was proved. Nitrogen-fixing cyanobacteria have delta 15N usually close to 0 ppt. We measured N2-fixation at 12 ? 14 different locations parallel with measurement of relevant environmental characteristics and the natural abundance of delta 15N (-1.99 to 11.44 >). Path analysis of the dependence of delta 15N on N2-fixation, NO3-N, and NH4-N in water indicated that the effect of N2-fixation was moreimportant than the effect of nitrogen amount/form in water. The evidence we present suggests that delta 15N can be used as an indicator of the level of N2-fixation by CBM.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CE - Biochemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Biogeochemistry

ISSN

0168-2563

e-ISSN

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Svazek periodika

67

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

353-368

Kód UT WoS článku

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EID výsledku v databázi Scopus

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