Ammonium uptake kinetics and nitrification in mountain streams

Day, Natalie K.; Hall, Robert O.

doi:10.1086/690600

Cited by 26 publications

(23 citation statements)

References 61 publications

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“…Volatilization of ammonia through ammonia stripping is dependent on pH, pond depth (d), temperature ( T ), and ammonia concentration in the WSP, and is modeled using equations proposed in recent studies [ 47 , 48 ]. Ammonia and nitrate convert into organic compound mostly by autotrophs [ 11 , 49 ]. Photosynthesis is the main means by which autotrophs produce organic compounds and oxygen, which is done by consuming carob dioxide, water, and nutrients from their surroundings.…”

Section: Methodsmentioning

confidence: 99%

Modeling Nitrogen Dynamics in a Waste Stabilization Pond System Using Flexible Modeling Environment with MCMC

Mukhtar

Lin

Shipin

et al. 2017

IJERPH

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This study presents an approach for obtaining realization sets of parameters for nitrogen removal in a pilot-scale waste stabilization pond (WSP) system. The proposed approach was designed for optimal parameterization, local sensitivity analysis, and global uncertainty analysis of a dynamic simulation model for the WSP by using the R software package Flexible Modeling Environment (R-FME) with the Markov chain Monte Carlo (MCMC) method. Additionally, generalized likelihood uncertainty estimation (GLUE) was integrated into the FME to evaluate the major parameters that affect the simulation outputs in the study WSP. Comprehensive modeling analysis was used to simulate and assess nine parameters and concentrations of ON-N, NH3-N and NO3-N. Results indicate that the integrated FME-GLUE-based model, with good Nash–Sutcliffe coefficients (0.53–0.69) and correlation coefficients (0.76–0.83), successfully simulates the concentrations of ON-N, NH3-N and NO3-N. Moreover, the Arrhenius constant was the only parameter sensitive to model performances of ON-N and NH3-N simulations. However, Nitrosomonas growth rate, the denitrification constant, and the maximum growth rate at 20 °C were sensitive to ON-N and NO3-N simulation, which was measured using global sensitivity.

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Section: Methodsmentioning

confidence: 99%

Modeling Nitrogen Dynamics in a Waste Stabilization Pond System Using Flexible Modeling Environment with MCMC

Mukhtar

Lin

Shipin

et al. 2017

IJERPH

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“…We interpret these patterns to be representative of uptake in different stream compartments. The first edge of the pulse initially had more contact with the main channel, whereas the trailing edge had more time to interact with transient storage zones and reactive substrates (Day & Hall, ; Thomas et al, ). Consistent with this interpretation, uptake length in the rising limb was generally longer than uptake length in the falling limb (e.g., for PO 4 3− , maximum uptake lengths in the rising and falling limbs were 763 and 219 m, respectively, Table ).…”

Section: Discussionmentioning

confidence: 99%

“…Longer water residence times and more solute interaction with reactive areas should increase uptake (Ensign & Doyle, ; Johnson et al, ; Roberts, Mulholland, & Houser, ). We interpreted the positive effect on nutrient uptake derived from the weirs as a direct consequence of mean depth increase, leading to greater contact between solute and channel borders with a strong reactive stream compartment (Day & Hall, ). This interpretation follows the difference observed between rising (lower uptake) and falling limbs (greater uptake) as the falling limb has longer HRT and more interaction with reactive zones.…”

Section: Discussionmentioning

confidence: 99%

Nutrient uptake in a simplified stream channel: Experimental manipulation of hydraulic residence time and transient storage

et al. 2018

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Stream restoration efforts have aimed at increasing hydraulic residence time (HRT) and transient storage (TS) to enhance nutrient uptake, but there have been few controlled studies quantifying HRT and TS influences on nutrient uptake dynamics. We assessed the effects of HRT and TS on ammonium (NH4+) and phosphate (PO43−) uptake through controlled experiments in an artificial channel draining a pristine tropical stream. We experimentally dammed the channel with artificial weirs, to progressively increase HRT, and performed NH4+ and PO43− additions to estimate uptake each time a weir was added. We also ran consecutive additions of NH4+ and PO43− with no weirs, to evaluate short‐term changes in uptake metrics. Also, NH4+ was injected alone to assess potential nitrification. We observed that NH4+ and PO43− uptake rates were much greater in the very first addition, probably due to luxury uptake. The weirs increased mean HRT (from 8.5 to 12 min) and depth (from 6.5 to 8.9 cm) and decreased mean water velocity (0.40–0.28 m s−1). Surprisingly, damming decreased the relative size of transient storage zone (storage zone area/channel area, As/A from 0.72 to 0.55), indicating that greater depth increased A, but not As. Greater HRT increased uptake rates and velocities of both nutrients (p < 0.05). The NH4+ conversion to NO3− was estimated at 18% of NH4+ consumption, indicating that joint additions to measure NH4+ and NO3− uptake would not be feasible in this system. Our results suggest that increases in HRT can lead to a greater short‐term retention of nutrients, with implications for stream management and restoration initiatives.

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“…In RMNP and other portions of the Colorado Rockies, increased stream NO 3 ‐N concentrations have been observed (Lewis & Grant, ; Williams et al, ) and this pattern has been linked to regional atmospheric deposition patterns (Clow et al, ; Mast et al, ). Other work on dissolved inorganic N (DIN) uptake in RMNP streams, including NSV, has documented low NO 3 ‐N use efficiency and biological preference for NH 4 ‐N (Day & Hall, ). Additionally, Day and Hall () observed that up to 19% of injected NH 4 ‐N was immediately nitrified.…”

Section: Discussionmentioning

confidence: 99%

“…Other work on dissolved inorganic N (DIN) uptake in RMNP streams, including NSV, has documented low NO 3 ‐N use efficiency and biological preference for NH 4 ‐N (Day & Hall, ). Additionally, Day and Hall () observed that up to 19% of injected NH 4 ‐N was immediately nitrified. As such NH 4 ‐N is likely supporting much of the in‐stream DIN demand in NSV and other RMNP streams.…”

Section: Discussionmentioning

confidence: 99%

Evaluating Controls on Nutrient Retention and Export in Wide and Narrow Valley Segments of a Mountain River Corridor

2018

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Over the past few decades, nitrate‐nitrogen (NO3‐N) concentrations have increased within streams of the central Rockies, a pattern linked to regional N deposition trends. As NO3‐N concentrations increase, in‐stream biological demand may become saturated and stream N export may increase. In mountain landscapes, streams generally flow through steep, narrow valleys with limited riparian area and strong stream‐hillslope connectivity. Interspersed between the narrow valleys are wide segments where substantial floodplain riparian areas can develop. Here, we coupled measures of stream reach NO3‐N flux balances with nutrient enrichment experiments along two stream reaches of contrasting valley morphology in Rocky Mountain National Park. The stream reaches were (1) a narrow valley segment with limited floodplain riparian area and (2) a longitudinally adjacent (directly downstream) wide valley segment with extensive floodplain riparian area. We found that in‐stream biological uptake of added NO3‐N was limited in both segments, presumably as a consequence of saturating conditions. Assessment of mass flux indicated that the narrow valley segment was a consistent source of water and NO3‐N across flow states, while the wide segment was a sink at high flow and a source at low flow. Due to low in‐stream biological retention, gross gains and losses of water and NO3‐N to and from the stream exerted primary constraint on segment mass balances. Our results suggest that the exchange of water and nutrients between the stream and adjacent landscape can exert strong control on reach‐scale nutrient export, particularly in streams experiencing or approaching N saturation.

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Ammonium uptake kinetics and nitrification in mountain streams

Cited by 26 publications

References 61 publications

Modeling Nitrogen Dynamics in a Waste Stabilization Pond System Using Flexible Modeling Environment with MCMC

Modeling Nitrogen Dynamics in a Waste Stabilization Pond System Using Flexible Modeling Environment with MCMC

Nutrient uptake in a simplified stream channel: Experimental manipulation of hydraulic residence time and transient storage

Evaluating Controls on Nutrient Retention and Export in Wide and Narrow Valley Segments of a Mountain River Corridor

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