Comparison of the impacts of acid and nitrogen additions on carbon fluxes in European conifer and broadleaf forests

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F18%3A43897451" target="_blank" >RIV/60076658:12310/18:43897451 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/86652079:_____/18:00490776 RIV/00025798:_____/18:00000177 RIV/00216208:11310/18:10378770

Výsledek na webu

<a href="https://reader.elsevier.com/reader/sd/pii/S0269749118302793?token=5CD8258E3CEA79D4821D7B9F9F3EC9B9B1630ACFB5A185060FB7CD35E238BE505B174013CB4640A353FD38E00589B915" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0269749118302793?token=5CD8258E3CEA79D4821D7B9F9F3EC9B9B1630ACFB5A185060FB7CD35E238BE505B174013CB4640A353FD38E00589B915</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.envpol.2018.03.081" target="_blank" >10.1016/j.envpol.2018.03.081</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of the impacts of acid and nitrogen additions on carbon fluxes in European conifer and broadleaf forests

Popis výsledku v původním jazyce

Increased reactive nitrogen (N) loadings to terrestrial ecosystems are believed to have positive effects on ecosystem carbon (C) sequestration. Global &quot;hot spots&quot; of N deposition are often associated with currently or formerly high deposition of sulphur (S); C fluxes in these regions might therefore not be responding solely to N loading, and could be undergoing transient change as S inputs change. In a four-year, two-forest stand (mature Norway spruce and European beech) replicated field experiment involving acidity manipulation (sulphuric acid addition), N addition (NH4NO3) and combined treatments, we tested the extent to which altered soil solution acidity or/and soil N availability affected the concentration of soil dissolved organic carbon (DOC), soil respiration (Rs), microbial community characteristics (respiration, biomass, fungi and bacteria abundances) and enzyme activity. We demonstrated a large and consistent suppression of soil water DOC concentration driven by chemical changes associated with increased hydrogen ion concentrations under acid treatments, independent of forest type. Soil respiration was suppressed by sulphuric acid addition in the spruce forest, accompanied by reduced microbial biomass, increased fungal:bacterial ratios and increased C to N enzyme ratios. We did not observe equivalent effects of sulphuric acid treatments on Rs in the beech forest, where microbial activity appeared to be more tightly linked to N acquisition. The only changes in C cycling following N addition were increased C to N enzyme ratios, with no impact on C fluxes (either Rs or DOC). We conclude that C accumulation previously attributed solely to N deposition could be partly attributable to their simultaneous acidification.

Název v anglickém jazyce

Comparison of the impacts of acid and nitrogen additions on carbon fluxes in European conifer and broadleaf forests

Popis výsledku anglicky

Increased reactive nitrogen (N) loadings to terrestrial ecosystems are believed to have positive effects on ecosystem carbon (C) sequestration. Global &quot;hot spots&quot; of N deposition are often associated with currently or formerly high deposition of sulphur (S); C fluxes in these regions might therefore not be responding solely to N loading, and could be undergoing transient change as S inputs change. In a four-year, two-forest stand (mature Norway spruce and European beech) replicated field experiment involving acidity manipulation (sulphuric acid addition), N addition (NH4NO3) and combined treatments, we tested the extent to which altered soil solution acidity or/and soil N availability affected the concentration of soil dissolved organic carbon (DOC), soil respiration (Rs), microbial community characteristics (respiration, biomass, fungi and bacteria abundances) and enzyme activity. We demonstrated a large and consistent suppression of soil water DOC concentration driven by chemical changes associated with increased hydrogen ion concentrations under acid treatments, independent of forest type. Soil respiration was suppressed by sulphuric acid addition in the spruce forest, accompanied by reduced microbial biomass, increased fungal:bacterial ratios and increased C to N enzyme ratios. We did not observe equivalent effects of sulphuric acid treatments on Rs in the beech forest, where microbial activity appeared to be more tightly linked to N acquisition. The only changes in C cycling following N addition were increased C to N enzyme ratios, with no impact on C fluxes (either Rs or DOC). We conclude that C accumulation previously attributed solely to N deposition could be partly attributable to their simultaneous acidification.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Environmental Pollution

ISSN

0269-7491

e-ISSN

—

Svazek periodika

238

Číslo periodika v rámci svazku

JUL 2018

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

884-893

Kód UT WoS článku

000434754600094

EID výsledku v databázi Scopus

2-s2.0-85044957820