The deeper, the more distinct:dissolved organic matter composition differs between soil types and diverges with depths

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F25%3A00639581" target="_blank" >RIV/86652079:_____/25:00639581 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00025798:_____/25:10169928

Výsledek na webu

<a href="https://www.bing.com/search?pglt=43&q=10.3389%2Ffenvs.2025.1675720&cvid=08a61186a4a842238953e147c1099833&gs_lcrp=EgRlZGdlKgYIABBFGDkyBggAEEUYOTIGCAEQRRg8MggIAhDpBxj8VdIBBzUyMGowajGoAgCwAgA&FORM=ANNAB1&PC=U531" target="_blank" >https://www.bing.com/search?pglt=43&q=10.3389%2Ffenvs.2025.1675720&cvid=08a61186a4a842238953e147c1099833&gs_lcrp=EgRlZGdlKgYIABBFGDkyBggAEEUYOTIGCAEQRRg8MggIAhDpBxj8VdIBBzUyMGowajGoAgCwAgA&FORM=ANNAB1&PC=U531</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fenvs.2025.1675720" target="_blank" >10.3389/fenvs.2025.1675720</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The deeper, the more distinct:dissolved organic matter composition differs between soil types and diverges with depths

Popis výsledku v původním jazyce

Dissolved organic matter (DOM) is a key component in the carbon and energy cycling of soil and aquatic ecosystems. Tracking DOM composition through soil profiles provides insight into the processes driving its transport and transformation. However, there is a lack of studies investigating whether DOM composition in deeper mineral soil is driven by topsoil inputs, or if processes during soil passage cause a rather uniform DOM quality irrespective of the source. Understanding the topsoil influence on subsoil DOM and depth-dependent transformation patterns is crucial for the transfer to and its fate within aquatic ecosystems. To address this knowledge gap, we examined the compositional features of DOM sampled in situ along depth profiles of four contrasting soil types (Peat, peaty Gleysol, Cambisol, Podzol) in a mountainous catchment (Ore Mountains, Germany). A combination of pyrolysis-gas chromatography/mass spectrometry and UV and fluorescence spectroscopy was used to characterize the molecular properties of DOM and similarities across the different soils and depths were achieved by Bray-Curtis dissimilarity analysis.nResults revealed site-specific decreases in similarity with depth, driven by soil processes that progressively alter DOM composition. In Peat, composition remained rather similar between D1 and D2 or D3 (57-59%), likely due to constantly anoxic conditions that inhibit oxidative degradation and transformation of DOM. In the peaty Gleysol, moderate transformations were observed (41-59% similarity), likely driven by alternating redox conditions and sorptive interactions. The strongest compositional changes occurred in the Cambisol with similarity between D1 and D3 reaching 18%, suggesting microbial processing in conjunction with sorptive interactions with the mineral phase. In the Podzol, the formation of organo-metal complexes promoted selective preservation of aromatic structures. The site-specific processes led to decreases in both the number and abundance of identified shared compounds with depth, contrasting the assumption of DOM similarity across different soilntypes. Despite the changes with depth, subsoil DOM composition in Peat, peaty Gleysol, and Podzol still retained some imprint of topsoil sources. This study highlights how site-specific biotic and abiotic processing generates unique DOM composition that shape organic matter cycling in soils and its ecological implications in aquatic systems.

Název v anglickém jazyce

The deeper, the more distinct:dissolved organic matter composition differs between soil types and diverges with depths

Popis výsledku anglicky

Dissolved organic matter (DOM) is a key component in the carbon and energy cycling of soil and aquatic ecosystems. Tracking DOM composition through soil profiles provides insight into the processes driving its transport and transformation. However, there is a lack of studies investigating whether DOM composition in deeper mineral soil is driven by topsoil inputs, or if processes during soil passage cause a rather uniform DOM quality irrespective of the source. Understanding the topsoil influence on subsoil DOM and depth-dependent transformation patterns is crucial for the transfer to and its fate within aquatic ecosystems. To address this knowledge gap, we examined the compositional features of DOM sampled in situ along depth profiles of four contrasting soil types (Peat, peaty Gleysol, Cambisol, Podzol) in a mountainous catchment (Ore Mountains, Germany). A combination of pyrolysis-gas chromatography/mass spectrometry and UV and fluorescence spectroscopy was used to characterize the molecular properties of DOM and similarities across the different soils and depths were achieved by Bray-Curtis dissimilarity analysis.nResults revealed site-specific decreases in similarity with depth, driven by soil processes that progressively alter DOM composition. In Peat, composition remained rather similar between D1 and D2 or D3 (57-59%), likely due to constantly anoxic conditions that inhibit oxidative degradation and transformation of DOM. In the peaty Gleysol, moderate transformations were observed (41-59% similarity), likely driven by alternating redox conditions and sorptive interactions. The strongest compositional changes occurred in the Cambisol with similarity between D1 and D3 reaching 18%, suggesting microbial processing in conjunction with sorptive interactions with the mineral phase. In the Podzol, the formation of organo-metal complexes promoted selective preservation of aromatic structures. The site-specific processes led to decreases in both the number and abundance of identified shared compounds with depth, contrasting the assumption of DOM similarity across different soilntypes. Despite the changes with depth, subsoil DOM composition in Peat, peaty Gleysol, and Podzol still retained some imprint of topsoil sources. This study highlights how site-specific biotic and abiotic processing generates unique DOM composition that shape organic matter cycling in soils and its ecological implications in aquatic systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10503 - Water resources

Projekt

<a href="/cs/project/GC21-22810J" target="_blank" >GC21-22810J: Vztah mezi chemickým složením rozpuštěné organické hmoty a cyklem živin v lesních povodích mírného pásma</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Frontiers in Environmental Science

ISSN

2296-665X

e-ISSN

2296-665X

Svazek periodika

13

Číslo periodika v rámci svazku

Oct.

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

15

Strana od-do

1675720

Kód UT WoS článku

001592972100001

EID výsledku v databázi Scopus

2-s2.0-105018930931