Dissolved and gaseous nitrogen losses in forests controlled by soil nutrient stoichiometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F21%3A00543408" target="_blank" >RIV/67985831:_____/21:00543408 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60076658:12310/21:43903368 RIV/86652079:_____/21:00543408 RIV/00025798:_____/21:00000115 RIV/67985874:_____/21:00543408

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1748-9326/ac007b" target="_blank" >https://iopscience.iop.org/article/10.1088/1748-9326/ac007b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-9326/ac007b" target="_blank" >10.1088/1748-9326/ac007b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dissolved and gaseous nitrogen losses in forests controlled by soil nutrient stoichiometry

Popis výsledku v původním jazyce

Global chronic nitrogen (N) deposition to forests can alleviate ecosystem N limitation, with potentially wide ranging consequences for biodiversity, carbon sequestration, soil and surface water quality, and greenhouse gas emissions. However, the ability to predict these consequences requires improved quantification of hard-to-measure N fluxes, particularly N gas loss and soil N retention. Here we combine a unique set of long-term catchment N budgets in the central Europe with ecosystem N-15 data to reveal fundamental controls over dissolved and gaseous N fluxes in temperate forests. Stream leaching losses of dissolved N corresponded with nutrient stoichiometry of the forest floor, with stream N losses increasing as ecosystems progress towards phosphorus limitation, while soil N storage increased with oxalate extractable iron and aluminium content. Our estimates of soil gaseous losses based on N-15 stocks averaged 2.5 +/- 2.2 kg N ha(-1) yr(-1) and comprised 20% +/- 14% of total N deposition. Gaseous N losses increased with forest floor N:P ratio and with dissolved N losses. Our relationship between gaseous and dissolved N losses was also able to explain previous N-15-based N loss rates measured in tropical and subtropical catchments, suggesting a generalisable response driven by nitrate (NO3 (-)) abundance and in which the relative importance of dissolved N over gaseous N losses tended to increase with increasing NO3 (-) export. Applying this relationship globally, we extrapolated current gaseous N loss flux from forests to be 8.9 Tg N yr(-1), which represent 39% of current N deposition to forests worldwide.

Název v anglickém jazyce

Dissolved and gaseous nitrogen losses in forests controlled by soil nutrient stoichiometry

Popis výsledku anglicky

Global chronic nitrogen (N) deposition to forests can alleviate ecosystem N limitation, with potentially wide ranging consequences for biodiversity, carbon sequestration, soil and surface water quality, and greenhouse gas emissions. However, the ability to predict these consequences requires improved quantification of hard-to-measure N fluxes, particularly N gas loss and soil N retention. Here we combine a unique set of long-term catchment N budgets in the central Europe with ecosystem N-15 data to reveal fundamental controls over dissolved and gaseous N fluxes in temperate forests. Stream leaching losses of dissolved N corresponded with nutrient stoichiometry of the forest floor, with stream N losses increasing as ecosystems progress towards phosphorus limitation, while soil N storage increased with oxalate extractable iron and aluminium content. Our estimates of soil gaseous losses based on N-15 stocks averaged 2.5 +/- 2.2 kg N ha(-1) yr(-1) and comprised 20% +/- 14% of total N deposition. Gaseous N losses increased with forest floor N:P ratio and with dissolved N losses. Our relationship between gaseous and dissolved N losses was also able to explain previous N-15-based N loss rates measured in tropical and subtropical catchments, suggesting a generalisable response driven by nitrate (NO3 (-)) abundance and in which the relative importance of dissolved N over gaseous N losses tended to increase with increasing NO3 (-) export. Applying this relationship globally, we extrapolated current gaseous N loss flux from forests to be 8.9 Tg N yr(-1), which represent 39% of current N deposition to forests worldwide.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10501 - Hydrology

Projekt

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

Návaznosti

—

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Environmental Research Letters

ISSN

1748-9326

e-ISSN

1748-9326

Svazek periodika

16

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

064025

Kód UT WoS článku

000655341900001

EID výsledku v databázi Scopus

2-s2.0-85107763814