Eva Přechová

Source apportionment of reactive nitrogen in fog vs. rain using isotope ratios and Bayesian modeling (Ore and Eagle Mts., Central Europe)

Martin Novak, Frantisek Buzek, Bohuslava Čejková, Daniel Hladký et autres

ABSTRACT Estimates of atmospheric inputs of reactive nitrogen (N r ) into ecosystems are often based on vertical deposition. We investigated to what extent horizontal deposition affects total atmospheric deposition of N r in two sparsely populated mountain regions near the Czech–German–Polish …

cz, pl (code pays fourni par la source)

Source apportionment of reactive nitrogen in fog vs. rain using isotope ratios and Bayesian modeling (Ore and Eagle Mts., Central Europe)

Martin J.V. Novák, František Buzek, Bohuslava Čejková, Daniel Hladký et autres

cz, pl (code pays fourni par la source)

Changing isotope compositions of Mg, Ca and Sr in bulk crystalline rocks toward the weathering front: Disentangling inputs of geogenic base cations into ecosystems

Martin Novák, Yulia V. Erban Kochergina, Chris Holmden, Alexandre V. Andronikov et autres

cz, ca, ch (code pays fourni par la source)

Lead sources for aerosol in urban Upper Silesia determined from Pb isotope ratios of nine mixing end-members and Bayesian modeling

Martin Novák, Eva Martínková, Ladislav Strnad, Radim Seibert et autres

cz, pl (code pays fourni par la source)

Microbial community dynamics in two Central European peatlands affected by different nitrogen depositions

Jiří Bárta, Hana Šantrůčková, Martin Novák, Bohuslava Čejková et autres

Changes in organic matter accumulation in wetlands are critical for climate dynamics. Different nitrogen (N) inputs in Sphagnum-dominated peat bogs can lead to varying rates of carbon (C) and N accumulation, influencing greenhouse gas emissions. We investigated how contrasting N deposition shapes …

us, cz (code pays fourni par la source)

Lead Sources for Aerosol in Urban Upper Silesia: Roles of Iron Metallurgy, Unleaded Fuel, Brake and Tire Wear, Smelters, and Coal Incineration Estimated from Isotope Ratios and Bayesian Modeling

Martin Novák, Eva Martínková, Ladislav Strnad, Radim Seibert et autres

cz (code pays fourni par la source)

Ammonium and nitrate in ice accretions and snow at two Central European montane locations: δ15N and δ18 O H 2 O isotope ratios, fluxes and sources

Martin Novák, František Bůzek, Radim Seibert, Iva Hůnová et autres

cz (code pays fourni par la source)

δ26Mg, δ44Ca and 87Sr/86Sr isotope ratios constrain Mg and Ca input–output mass balances in a heavily acidified headwater catchment

Martin Novák, František Veselovský, Jakub Hruška, Chris Holmden et autres

A Central European catchment underlain by base-poor orthogneiss was studied using mass budgets and Mg–Ca–Sr isotope systematics. For 50 years, the catchment received large amounts of partly soluble dust from a nearby cluster of coal-burning power plants, while suffering from acid rain …

cz, ca (code pays fourni par la source)

Sizeable net export of base cations from a Carpathian flysch catchment indicates their geogenic origin while the 26Mg/24Mg, 44Ca/40Ca and 87Sr/86Sr isotope ratios in runoff are indistinguishable from atmospheric input

Martin Novák, Yulia V. Erban Kochergina, Alexandre V. Andronikov, Chris Holmden et autres

Abstract Nutrient imbalances may negatively affect the health status of forests exposed to multiple stress factors, including drought and bark beetle calamities. We studied the origin of base cations in runoff from a small Carpathian catchment underlain by base-poor flysch turbidites using …

cz, ca (code pays fourni par la source)

A Sphagnum incubation study using 15N-labelled atmospheric N2 reveals contrasting potential for biological N2 fixation at three medium-polluted Central European peat bogs

Markéta Štěpánová, Martin Novák, Bohuslava Čejková, František Bůzek et autres

Microbial N2-fixation helps to sustain carbon accumulation in pristine peatlands and to remove CO2 from the atmosphere. Recent work has provided evidence that this energetically costly process is not completely downregulated at sites with higher availability of reactive nitrogen (Nr). We studied …

cz (code pays fourni par la source)

Mg, Ca and Sr isotope dynamics in a small forested catchment underlain by paragneiss: The role of geogenic, atmospheric, and biogenic sources of base cations

Martin Novák, Chris Holmden, Alexandre V. Andronikov, Yulia V. Erban Kochergina et autres

Knowledge of the origin of magnesium (Mg) and calcium (Ca) in soil solutions and catchment runoff helps to predict forest ecosystems’ vulnerability to deficiencies in essential nutrients in an era of climate change, environmental pollution and bark-beetle calamities. Here we discuss isotope …

cz, ca, ch (code pays fourni par la source)

Contrasting potential for biological N 2 fixation at three polluted central European Sphagnum peat bogs: combining the 15 N 2 -tracer and natural-abundance isotope approaches

Markéta Štěpánová, Martin Novák, Bohuslava Čejková, Ivana Jačková et autres

Abstract. Availability of reactive nitrogen (Nr) is a key control on carbon (C) sequestration in wetlands. To complement the metabolic demands of Sphagnum in pristine rain-fed bogs, diazotrophs supply additional Nr via biological nitrogen fixation (BNF). As breaking the triple bond of …

cz (code pays fourni par la source)