Major and trace elements in suspended matter of western Siberian rivers: First assessment across permafrost zones and landscape parameters of watersheds

Krickov, Ivan V.; Lim, Artem G.; Manasypov, Rinat M.; Loiko, Sergey V.; Vorobyev, Sergey N.; Шевченко, В. П.; Dara, O. M.; Гордеев, В. В.; Pokrovsky, Oleg S.

doi:10.1016/j.gca.2019.11.005

Cited by 46 publications

(32 citation statements)

References 79 publications

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“…Though background DOC and nutrient conditions varied among the sites, we kept the treatments consistent for comparison and to simulate how permafrost degradation may release concentrations of acetate and nutrients uncorrelated with modern in‐stream conditions (Coch et al, 2020; Ewing et al, 2015; Tanski et al, 2017). While we recognize that micronutrients can limit microbial activity, we limited the experiment to carbon, nitrogen, and phosphorus additions for logistical reasons—for example, there is great diversity of observed micronutrients in permafrost waterways and soils (Carey et al, 2019; Krickov et al, 2020; Reyes & Lougheed, 2015).…”

Section: Methodsmentioning

confidence: 99%

Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects

Wologo

Shakil

Zolkos

et al. 2021

Global Biogeochemical Cycles

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Permafrost degradation is delivering bioavailable dissolved organic matter (DOM) and inorganic nutrients to surface water networks. While these permafrost subsidies represent a small portion of total fluvial DOM and nutrient fluxes, they could influence food webs and net ecosystem carbon balance via priming or nutrient effects that destabilize background DOM. We investigated how addition of biolabile carbon (acetate) and inorganic nutrients (nitrogen and phosphorus) affected DOM decomposition with 28‐day incubations. We incubated late‐summer stream water from 23 locations nested in seven northern or high‐altitude regions in Asia, Europe, and North America. DOM loss ranged from 3% to 52%, showing a variety of longitudinal patterns within stream networks. DOM optical properties varied widely, but DOM showed compositional similarity based on Fourier transform ion cyclotron resonance mass spectrometry (FT‐ICR MS) analysis. Addition of acetate and nutrients decreased bulk DOM mineralization (i.e., negative priming), with more negative effects on biodegradable DOM but neutral or positive effects on stable DOM. Unexpectedly, acetate and nutrients triggered breakdown of colored DOM (CDOM), with median decreases of 1.6% in the control and 22% in the amended treatment. Additionally, the uptake of added acetate was strongly limited by nutrient availability across sites. These findings suggest that biolabile DOM and nutrients released from degrading permafrost may decrease background DOM mineralization but alter stoichiometry and light conditions in receiving waterbodies. We conclude that priming and nutrient effects are coupled in northern aquatic ecosystems and that quantifying two‐way interactions between DOM properties and environmental conditions could resolve conflicting observations about the drivers of DOM in permafrost zone waterways.

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Section: Methodsmentioning

confidence: 99%

Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects

Wologo

Shakil

Zolkos

et al. 2021

Global Biogeochemical Cycles

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“…Noteworthy rather similar (< 30% difference) concentration of K in all rivers sampled during spring flood (this study) and summer baseflow [23][24][25], despite significant dilution, expected during high flow. A likely cause could be K leaching from terrestrial vegetation and silicate river suspended matter; both are the highest during spring flood as it is known from other permafrost Siberian rivers [42,61,62]. Another interesting observation is much higher (a factor of 3 to 20) Si concentrations during spring flood compared to summer baseflow.…”

Section: Comparison With Other Data On Element Concentration In the Lena River And Its Tributariesmentioning

confidence: 96%

“…Finally, Al-rich colloids and subcolloidal particles likely controlled typically lithogenic trace elements (Ti, Cr, Ga, Nb, Cs, REE, Th) and could be produced during riverine DOM leaching of alumosilicate river suspended matter (i.e., ref. 62). Intensive mobilization of lithogenic elements via desorption from alumosilicate material of the river suspended matter into soluble (< 0.45 µm) form is consistent with strong correlations of these elements with Al, in both main stem and the tributaries (Table S3).…”

Section: Possible Carries Of Trace Elements In the Lena River Basin Based On Elementary Correlations And Pcamentioning

confidence: 99%

Testing Landscape, Climate and Lithology Impact on Carbon, Major and Trace Elements of the Lena River and Its Tributaries During a Spring Flood Period

Vorobyev¹,

Kolesnichenko²,

Korets³

et al. 2021

Preprint

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Transport of carbon, major and trace element by rivers in permafrost-affected regions is one of the key factor of circumpolar aquatic ecosystem response to climate warming and permafrost thaw. While seasonal and annual export fluxes (yields) of carbon (C) and inorganic solutes are fairly well known for all large Arctic rivers, spatial variations in elementary concentration along the river length and among its tributaries remain poorly understood. Moreover, the landscape factors controlling riverine element concentration in permafrost-affected regions are still poorly constrained. This is especially true for the largest river of Eastern Siberia, the Lena River, which drains through continuous permafrost zones with highly variable lithology and vegetation. Here we present the results of C, major and trace element measurements over a 2600-km transect of the Lena River main stem (upper and middle reaches) including its 30 tributaries, conducted at the peak of the spring flood. There were two main group of solutes in the main stem depending on their spatial pattern: i) elements that decreased their concentrations downstream, from SW to NE (Cl, SO4, DIC, Li, B, Na, Mg, K, Ca, As, Sr, Mo, Sb, Ba and U), which probably reflected a decrease in the proportion of carbonate rocks in the watershed and the degree of groundwater feeding, and ii) elements that increased their concentrations downstream (Al, Ti, Cr, Fe, Ga, Rb, Y, Zr, Nb, Cs, REEs, Hf and Th), which was tentatively linked to an increase in organic C stock in soils, larch forest coverage and enhanced mobilization of lithogenic elements from silicate soil minerals. Based on landscape parameters of Lena tributaries, we tested the impact of major environmental factors on major and trace element spatial pattern. Among all the variables, the proportion of sporadic permafrost on the watershed strongly controlled concentrations of soluble highly mobile elements (Cl, B, DIC, Li, Na, K, Mg, Ca, Sr, Mo, As and U). Another important factor of element concentration control in the Lena River tributaries was the coverage of watershed by light (B, Cl, Na, K, U) and deciduous (Fe, Ni, Zn, Ge, Rb, Zr, La, Th) needle-leaf forest (pine and larch). The latter, however, could also reflect the DOC-enhanced transport of low-soluble trace elements in the NW part of the basin. This part of the basin is dominated by silicate rocks and continuous permafrost, as compared to carbonate rock-dominated and groundwater-affected SW part of the Lena River basin. Overall, the impact of rock lithology and permafrost on major and trace solutes of the Lena River basin during the peak of spring flood was mostly detected at the scale of the main stem. Such an impact for tributaries was much less pronounced, because of the dominance of surface flow and lower hydrological connectivity with deep groundwater in the latter. Future changes in the river water chemistry linked to climate warming and permafrost thaw at the scale of the whole river basin are likely to be linked to changes in spatial pattern of dominant vegetation, rather than to the permafrost regime. We argue that comparable studies of large, permafrost-impacted rivers during most contrasting seasons, including winter baseflow, should allow efficient prediction of future changes in riverine ‘inorganic’ hydrochemistry induced by permafrost thaw.

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“…In 2002, Pokrovsky and Schott revealed the presence, in boreal Russian rivers, of two pools of colloids composed of organicrich and Fe-rich particles, considered to be the most important potential carriers for other elements, which they divided into four groups with different distribution patterns: 1) dissolved simple anions; 2) elements mainly adsorbed on carbon-based colloids; 3) elements mainly adsorbed on iron-rich colloids; and 4) elements almost equally distributed between carbon colloids and iron colloids (the last being more common; Lyvén et al, 2003). Following this finding, iron and carbon colloidal carrier phases were shown to transport rare earth and trace elements in boreal and subarctic rivers (Anderson et al, 2006;Dahlqvist et al, 2007;Pokrovski et al, 2010;Krickov et al, 2019;Cuss et al, 2020). Complexation of trace elements by OM in colloidal form would decrease their lability (Aiken et al, 2011;Stockdale et al, 2014;Cuss et al, 2020).…”

Section: T-hg and Mehg Links With Organic Matter In Riversmentioning

confidence: 98%

Mercury Export From Freshwater to Estuary: Carbocentric Science Elucidates the Fate of a Toxic Compound in Aquatic Boreal Environments

Demarty¹,

Bilodeau

Tremblay

2021

Front. Environ. Sci.

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The chemistry of mercury in freshwater systems, particularly man-made reservoirs, has received a great deal of attention owing to the high toxicity of the most common organic form, methylmercury. Although methylmercury bioaccumulation in reservoirs and natural lakes has been extensively studied at all latitudes, the fate of the different forms of mercury (total vs. dissolved; organic vs. inorganic) along the entire river-estuary continuum is less well documented. In fact, the difficulty of integrating the numerous parameters involved in mercury speciation in such large study areas, combined with the technical difficulties in sampling and analyzing mercury, have undoubtedly hindered advances in the field. At the same time, carbocentric science has grown exponentially in the last 25 years, and the common fate of carbon and mercury in freshwater has become increasingly clear with time. This literature review, by presenting the knowledge acquired in these two fields, aims to better understand the extent of mercury export from boreal inland waters to estuaries and to investigate the possible downstream ecotoxicological impact of reservoir creation on mercury bioavailability to estuarine food webs and local communities.

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Major and trace elements in suspended matter of western Siberian rivers: First assessment across permafrost zones and landscape parameters of watersheds

Cited by 46 publications

References 79 publications

Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects

Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects

Testing Landscape, Climate and Lithology Impact on Carbon, Major and Trace Elements of the Lena River and Its Tributaries During a Spring Flood Period

Mercury Export From Freshwater to Estuary: Carbocentric Science Elucidates the Fate of a Toxic Compound in Aquatic Boreal Environments

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