Contrasting catchment soil pH and Fe concentrations influence DOM distribution and nutrient dynamics in freshwater systems

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F23%3A00571075" target="_blank" >RIV/60077344:_____/23:00571075 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/23:43907278

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0048969722070887?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0048969722070887?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.scitotenv.2022.159988" target="_blank" >10.1016/j.scitotenv.2022.159988</a>

Result language

angličtina

Original language name

Contrasting catchment soil pH and Fe concentrations influence DOM distribution and nutrient dynamics in freshwater systems

Original language description

Organic matter (OM) quantity, quality, and nutrient dynamics within twelve shallow lakes in the Czech Republic were assessed in the context of catchment soil pH and iron (Fe) concentration. The catchments of the lakes were classified into two categories: (i) slightly acidic (soil pH = 5.1–6.3) with Fe-rich soils (H_Fe, Fe = 315–344 mg kg−1 in Mehlich 3 extract), and (ii) neutral (soil pH = 6.8–7.6) with Fe-poor soils (L_Fe, Fe = 126–259 mg kg−1 in Mehlich 3 extract). The quality of OM in the two lake types was characterized using a combination of spectroscopic techniques (UV–Vis, fluorescence, and Fourier Transform Infrared spectroscopy). We show that dissolved nutrient and dissolved organic carbon (DOC) concentrations, as well as the amount of aromatic and protein-like compounds in the water column and sediment porewater were significantly (p < 0.01) lower in the H_Fe lakes compared to the waterbodies located within L_Fe catchments. The FTIR analyses of the H_Fe sediments contained higher relative concentrations of aromatic compounds with hydroxyl-containing functional groups and carbohydrates, while more aliphatic and oxidised OM was found in the L_Fe lake sediments. These results suggest that the pH value of catchment soils and, particularly, their Fe content have profound geochemical effects on the mobility of OM and nutrients in the sediments of recipient waters. Because the OM-Fe association stabilises OM in sediments, waterbodies within L_Fe catchments are likely more vulnerable to increasing eutrophication and oxygen depletion compared to those in H_Fe catchments and this has important implications for water quality management, risk assessment, and predictions of aquatic ecosystem vulnerability under conditions of accelerating climate change.

Czech name

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Czech description

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Type

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

CEP classification

—

OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Science of the Total Environment

ISSN

0048-9697

e-ISSN

1879-1026

Volume of the periodical

858

Issue of the periodical within the volume

Pt 2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

159988

UT code for WoS article

001075260800001

EID of the result in the Scopus database

2-s2.0-85141791527