The Fate of 15N Tracer in Waterlogged Peat Cores from Two Central European Bogs with Different N Pollution History

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F18%3A00000178" target="_blank" >RIV/00025798:_____/18:00000178 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11270-018-3731-3?wt_mc=Internal.Event.1.SEM.ArticleAuthorIncrementalIssue#citeas" target="_blank" >https://link.springer.com/article/10.1007/s11270-018-3731-3?wt_mc=Internal.Event.1.SEM.ArticleAuthorIncrementalIssue#citeas</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11270-018-3731-3" target="_blank" >10.1007/s11270-018-3731-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Fate of 15N Tracer in Waterlogged Peat Cores from Two Central European Bogs with Different N Pollution History

Popis výsledku v původním jazyce

Under low nitrogen (N) input into rain-fed peat bogs, Sphagnum moss efficiently filters incoming N, preventing invasion of vascular plants and peat oxygenation. Elevated atmospheric N deposition, in combination with climatic warming, may cause retreat of bryophytes and degradation of peat deposits. There are concerns that higher emissions of greenhouse gases, accompanying peat thinning, will accelerate global warming. Breakthrough of deposited N below living moss has been quantified for two Central European peat bogs dominated by Sphagnum magellanicum. In the 1990s, the northern site, ZL, received three times more atmospheric N (> 40 kg ha-1 yr-1) than the southern site, BS. Today, atmospheric N inputs at both sites are comparable (15 and 11 kg ha-1 yr-1, respectively). Replicated peat cores were collected from the wet central segments of both study sites, 15N-NO3- tracer was applied on the moss surface, and the peat cores were incubated in water-logged conditions. After 40 weeks, the rate of downcore leaching of the 15N tracer was assessed. The recent history of high N pollution at ZL did not accelerate 15N penetration into deeper peat layers, relative to BS. At both sites, less than 3 percent of the 15N tracer reached the shallow depth of 9 cm. Analysis of control peat cores, along with a 210Pb chronology, revealed removal of the 'excess' N from the ZL peat profiles prior to sampling. Following a decrease of atmospheric N pollution at ZL in the past two decades, efficient filtering of atmospheric N by Sphagnum has been renewed.

Název v anglickém jazyce

The Fate of 15N Tracer in Waterlogged Peat Cores from Two Central European Bogs with Different N Pollution History

Popis výsledku anglicky

Under low nitrogen (N) input into rain-fed peat bogs, Sphagnum moss efficiently filters incoming N, preventing invasion of vascular plants and peat oxygenation. Elevated atmospheric N deposition, in combination with climatic warming, may cause retreat of bryophytes and degradation of peat deposits. There are concerns that higher emissions of greenhouse gases, accompanying peat thinning, will accelerate global warming. Breakthrough of deposited N below living moss has been quantified for two Central European peat bogs dominated by Sphagnum magellanicum. In the 1990s, the northern site, ZL, received three times more atmospheric N (> 40 kg ha-1 yr-1) than the southern site, BS. Today, atmospheric N inputs at both sites are comparable (15 and 11 kg ha-1 yr-1, respectively). Replicated peat cores were collected from the wet central segments of both study sites, 15N-NO3- tracer was applied on the moss surface, and the peat cores were incubated in water-logged conditions. After 40 weeks, the rate of downcore leaching of the 15N tracer was assessed. The recent history of high N pollution at ZL did not accelerate 15N penetration into deeper peat layers, relative to BS. At both sites, less than 3 percent of the 15N tracer reached the shallow depth of 9 cm. Analysis of control peat cores, along with a 210Pb chronology, revealed removal of the 'excess' N from the ZL peat profiles prior to sampling. Following a decrease of atmospheric N pollution at ZL in the past two decades, efficient filtering of atmospheric N by Sphagnum has been renewed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/GA16-18079S" target="_blank" >GA16-18079S: Izotopové doklady mikrobiální fixace dusíku v ombrotrofních mokřadech</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Water, Air and Soil Pollution

ISSN

0049-6979

e-ISSN

—

Svazek periodika

229

Číslo periodika v rámci svazku

3:70

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

nestránkováno

Kód UT WoS článku

000428305400030

EID výsledku v databázi Scopus

2-s2.0-85042379619