Widespread Increases in Iron Concentration in European and North American Freshwaters

Björnerås, C.; Weyhenmeyer, G. A.; Evans, C. D.; Gessner, M. O.; Grossart, H. P.; Kangur, K.; Kokorite, I.; Kortelainen, P.; Laudon, H.; Lehtoranta, J.; Lottig, N.; Monteith, D. T.; Nõges, P.; Nõges, T.; Oulehle, Filip; Riise, G.; Rusak, J. A.; Räike, A.; Sire, J.; Sterling, S.; Kritzberg, E. S.

doi:https://dx.doi.org/10.1002/2017GB005749

Number of the records: 1

Widespread Increases in Iron Concentration in European and North American Freshwaters

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SYSNO ASEP	0481710
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Widespread Increases in Iron Concentration in European and North American Freshwaters
Author(s)	Björnerås, C. (SE) Weyhenmeyer, G. A. (SE) Evans, C. D. (GB) Gessner, M. O. (DE) Grossart, H. P. (DE) Kangur, K. (EE) Kokorite, I. (LT) Kortelainen, P. (FI) Laudon, H. (SE) Lehtoranta, J. (FI) Lottig, N. (US) Monteith, D. T. (GB) Nõges, P. (EE) Nõges, T. (EE) Oulehle, Filip (UEK-B)_{RID, ORCID, SAI} Riise, G. (NO) Rusak, J. A. (CA) Räike, A. (FI) Sire, J. (LT) Sterling, S. (CA) Kritzberg, E. S. (SE)
Number of authors	21
Source Title	Global Biogeochemical Cycles. - : Wiley - ISSN 0886-6236 Roč. 31, č. 10 (2017), s. 1488-1500
Number of pages	13 s.
Language	eng - English
Country	US - United States
Keywords	browning ; climate change ; freshwaters ; iron ; trends
Subject RIV	EH - Ecology, Behaviour
OECD category	Environmental sciences (social aspects to be 5.7)
R&D Projects	GA15-08124S GA ČR - Czech Science Foundation (CSF)
Research Infrastructure	CzeCOS II - 90061 - Ústav výzkumu globální změny AV ČR, v. v. i.
Institutional support	UEK-B - RVO:86652079
UT WOS	000416625200002
EID SCOPUS	85031758536
DOI	10.1002/2017GB005749
Annotation	American Geophysical Union. All Rights Reserved. Recent reports of increasing iron (Fe) concentrations in freshwaters are of concern, given the fundamental role of Fe in biogeochemical processes. Still, little is known about the frequency and geographical distribution of Fe trends or about the underlying drivers. We analyzed temporal trends of Fe concentrations across 340 water bodies distributed over 10 countries in northern Europe and North America in order to gain a clearer understanding of where, to what extent, and why Fe concentrations are on the rise. We found that Fe concentrations have significantly increased in 28% of sites, and decreased in 4%, with most positive trends located in northern Europe. Regions with rising Fe concentrations tend to coincide with those with organic carbon (OC) increases. Fe and OC increases may not be directly mechanistically linked, but may nevertheless be responding to common regional-scale drivers such as declining sulfur deposition or hydrological changes. A role of hydrological factors was supported by covarying trends in Fe and dissolved silica, as these elements tend to stem from similar soil depths. A positive relationship between Fe increases and conifer cover suggests that changing land use and expanded forestry could have contributed to enhanced Fe export, although increases were also observed in nonforested areas. We conclude that the phenomenon of increasing Fe concentrations is widespread, especially in northern Europe, with potentially significant implications for wider ecosystem biogeochemistry, and for the current browning of freshwaters.
Workplace	Global Change Research Institute
Contact	Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268
Year of Publishing	2019

Number of the records: 1