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

Result code in 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>

Alternative codes found

RIV/00025798:_____/25:10169928

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10503 - Water resources

Project

<a href="/en/project/GC21-22810J" target="_blank" >GC21-22810J: Linking the composition of dissolved organic matter and nutrient cycling in streams of temperate forested catchments</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Frontiers in Environmental Science

ISSN

2296-665X

e-ISSN

2296-665X

Volume of the periodical

13

Issue of the periodical within the volume

Oct.

Country of publishing house

CH - SWITZERLAND

Number of pages

15

Pages from-to

1675720

UT code for WoS article

001592972100001

EID of the result in the Scopus database

2-s2.0-105018930931