What is the extent of water brownification in Lake Onego, Russia?

Калинкина, Н. М.; Теканова, Е. В.; Korosov, A. D.; Zobkov, Mikhail; Ryzhakov, A. V.

doi:10.1016/j.jglr.2020.02.008

Cited by 24 publications

(4 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Browning affects lakes in their entirety, but along watercourses the impacts of external Fe and DOC are attenuated downstream due to self‐purification processes, including dilution, filtering by organisms, chemical transformation, the degradation of substances, and sedimentation (Kalinkina et al, 2020). Photobleaching, degradation of DOM by sunlight, is largely limited to summer (Lorusso et al, 2020; Pace & Cole, 2002) and can have an important priming effect on further microbial degradation of DOM.…”

Section: Resultsmentioning

confidence: 99%

Browning of boreal lakes: Do public perceptions and governance align with the biological foundations?

Albrecht

Hannonen

Palacín-Lizarbe

et al. 2023

Ecological Applications

View full text Add to dashboard Cite

Browning of surface waters, also known as brownification, is a process of decreasing water transparency, particularly in boreal lakes surrounded by intensively managed forests and wetlands. In this paper, we review the ecological consequences and ecosystem-based management (EBM) of browning through a systematic review approach and adopt an interdisciplinary approach to formulating new governance of this complex phenomenon.To understand the effects of browning on the recreational value of freshwaters, we present primary survey data on public perceptions of recreational fishing tourists on water quality in Finland. We identify a need to develop EBM beyond the EU's Water Framework Directive (WFD) to fully account for the extensive implications of browning. We also highlight the need for a better understanding of the within-lake microbial processes to estimate the browning-associated changes in the greenhouse gas balance of lakes.Tourist perceptions of the quality of waterbodies in Finland were largely in agreement with the general proportion of waterbodies classified in a good or excellent ecological status class, but these perceptions may be detached from biological quality assessment criteria. Consequently, we suggest that the EBM of inland waters should improve the utilization of information on not only biogeochemical processes but also users' perspectives on aquatic ecosystems beyond the EU WFD.

show abstract

Section: Resultsmentioning

confidence: 99%

Browning of boreal lakes: Do public perceptions and governance align with the biological foundations?

Albrecht

Hannonen

Palacín-Lizarbe

et al. 2023

Ecological Applications

View full text Add to dashboard Cite

show abstract

“…Also, Onega's burden is only one urban center, the city of Petrozavodsk. On the other hand, recents studies in Onega have indicated significant water browning especially around Petrozavodsk Bay [47].…”

Section: Impact From Industries Coastal Settlements and External Loadmentioning

confidence: 98%

Assessing the Trend of the Trophic State of Lake Ladoga Based on Multi-Year (1997–2019) CMEMS GlobColour-Merged CHL-OC5 Satellite Observations

Gbagir

Colpaert

2020

Sensors

View full text Add to dashboard Cite

The trophic state of Lake Ladoga was studied during the period 1997–2019, using the Copernicus Marine Environmental Monitoring Service (CMEMS) GlobColour-merged chlorophyll-a OC5 algorithm (GlobColour CHL-OC5) satellite observations. Lake Ladoga, in general, is mesotrophic but certain parts of the lake have been eutrophic since the 1960s due to the discharge of wastewater from industrial, urban, and agricultural sources. Since then, many ecological assessments of the Lake’s state have been made. These studies have indicated that various changes are taking place in the lake and continuous monitoring of the lake is essential to update the current knowledge of its state. The aim of this study was to assess the long-term trend in chl-a in Lake Ladoga. The results showed a gradual reduction in chl-a concentration, indicating a moderate improvement. Chl-a concentrations (minimum-maximum values) varied spatially. The shallow southern shores did not show any improvement while the situation in the north is much better. The shore areas around the functioning paper mill at Pitkäranta and city of Sortavala still show high chl-a values. These findings provide a general reference on the current trophic state of Lake Ladoga that could contribute to improve policy and management strategies. It is assumed that the present warming trend of surface water may result in phytoplankton growth increase, thus partly offsetting a decrease in nutrient load. Precipitation is thought to be increasing, but the influence on water quality is less clear. Future studies could assess the current chemical composition to determine the state of water quality of Lake Ladoga.

show abstract

“…Despite their relatively small coverage, peatlands store about 15-30% of the world's soil carbon [1]. Allochthonous organic matter emerges as a crucial factor influencing the ecosystems of water bodies in northern temperate regions [2][3][4], contributing to the characteristic dark coloration of peatland waters [5]. The primary factors influencing seasonal fluctuations in the color of surface waters include climate parameters, such as precipitation and temperature [6].…”

Section: Introductionmentioning

confidence: 99%

“…Over past decades, several studies have demonstrated the darkening of both lentic and lotic waters in northern regions, a phenomenon referred to as water brownification [7][8][9]. For instance, a distinct trend towards increased water color has been reported in Petrozavodsk Bay and the Central Onego Lake water column, accompanied by a simultaneous rise in total iron and CO 2 concentrations in the epilimnion and a decrease in pH values during summer [4]. These trends are driven by several factors, including global climate warming [5,[10][11][12][13], changes in land-use (e.g., artificial ditching or forestry [6,[14][15][16], and decreasing acid deposition [17].…”

Section: Introductionmentioning

confidence: 99%

Dissolved Iron and Organic Matter in Boreal Rivers across a South–North Transect

Aleshina,

Rusakova,

Drozdova

et al. 2024

Environments

View full text Add to dashboard Cite

Iron (Fe) is one of the main nutrients present in dissolved, suspended, and colloidal states in river water. Predicting the composition and size of dissolved Fe compounds is crucial for assessing water quality. In this stud, we used a combination of physical methods (filtration), chemical techniques (ion exchange chromatography), and thermodynamic modeling (Visual MINTEQ) to characterize dissolved Fe speciation in boreal organic-rich rivers across a sizable south–north transect. We chose contrasting rivers with a predominance of either allochthonous or autochthonous organic compounds. We found that the dissolved organic matter (DOM) in the studied rivers varies in molecular weights and the degree of humification. Regardless of the climate parameters of the river watershed, the dominant status of dissolved Fe during the summer low-water period was essentially colloidal and dominated by anionic complexes of the type [MeL]n−.

show abstract

What is the extent of water brownification in Lake Onego, Russia?

Cited by 24 publications

References 40 publications

Browning of boreal lakes: Do public perceptions and governance align with the biological foundations?

Browning of boreal lakes: Do public perceptions and governance align with the biological foundations?

Assessing the Trend of the Trophic State of Lake Ladoga Based on Multi-Year (1997–2019) CMEMS GlobColour-Merged CHL-OC5 Satellite Observations

Dissolved Iron and Organic Matter in Boreal Rivers across a South–North Transect

Contact Info

Product

Resources

About