Uptake of nutrients and organic C in streams in New York City drinking-water-supply watersheds

Newbold, J. Denis; Bott, Thomas L.; Kaplan, Louis; Dow, Charles L.; Jackson, John K.; Aufdenkampe, A. K.; Martin, Lara A.; Horn, David Van; Long, Aaron A. de

doi:10.1899/0887-3593(2006)025[0998:uonaoc]2.0.co;2

Cited by 83 publications

(124 citation statements)

References 56 publications

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“…MULHOLLAND et al (1985) demonstrated that phosphorus uptake ) reported very rapid uptake of ammonium in another stream at Coweeta based on measurements made during peak leaf fall, and VALETT et al (2008) found that nitrate uptake in streams draining deciduous forests was greatest when temperatures were low but leaf standing crop in the streams was high. While these and other studies (e.g., NEWBOLD et al 2006;HOELLEIN et al, 2007;GOODALE et al, 2009) provide strong evidence for the connection between nutrient uptake and decaying leaves, we know of no published evidence documenting elevation of water column nutrient concentrations resulting from decaying leaves. HOWARTH and FISHER (1976) found increases in water column nitrogen and phosphorus during leaf decay in laboratory chambers under elevated nutrient conditions, but we are not aware of similar results for natural streams.…”

Section: Do Microbial Processes On Decaying Leaves Modify Water Colummentioning

confidence: 64%

Nutrient Uptake and Mineralization during Leaf Decay in Streams – a Model Simulation

Webster

Newbold

Thomas

et al. 2009

International Review of Hydrobiology

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We developed a stoichiometrically explicit computer model to examine how heterotrophic uptake of nutrients and microbial mineralization occurring during the decay of leaves in streams may be important in modifying nutrient concentrations. The simulations showed that microbial uptake can substantially decrease stream nutrient concentrations during the initial phases of decomposition, while mineralization may produce increases in concentrations during later stages of decomposition. The simulations also showed that initial nutrient content of the leaves can affect the stream nutrient concentration dynamics and determine whether nitrogen or phosphorus is the limiting nutrient. Finally, the simulations suggest a net retention (uptake > mineralization) of nutrients in headwater streams, which is balanced by export of particulate organic nutrients to downstream reaches. Published studies support the conclusion that uptake can substantially change stream nutrient concentrations. On the other hand, there is little published evidence that mineralization also affects nutrient concentrations. Also, there is little information on direct microbial utilization of nutrients contained in the decaying leaves themselves. Our results suggest several directions for research that will improve our understanding of the complex relationship between leaf decay and nutrient dynamics in streams.

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Section: Do Microbial Processes On Decaying Leaves Modify Water Colummentioning

confidence: 64%

Nutrient Uptake and Mineralization during Leaf Decay in Streams – a Model Simulation

Webster

Newbold

Thomas

et al. 2009

International Review of Hydrobiology

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“…where N 0 is nutrient concentration at the injection site, N x is nutrient concentration at x m downstream, and a is the m 21 uptake constant (Newbold et al 1981). We used the conservative tracer to correct plateau nutrient concentrations for dilution and estimated the parameter a in Eq.…”

Section: Methodsmentioning

confidence: 99%

“…1 by plotting dilution-corrected nutrient concentrations vs. distance from the injection site. We calculated S w as 2a 21 (Newbold et al 1981), which represents the average distance (m) traveled by a nutrient molecule before uptake. However, S w is sensitive to variations in stream size, which can confound inter-site or temporal comparisons of S w (Davis and Minshall 1999).…”

Section: Methodsmentioning

confidence: 99%

“…Biological uptake and transformation of nutrients in headwater streams can regulate nutrient export to downstream ecosystems , and this biological activity can be measured at the whole-stream level using nutrient spiraling techniques (Newbold et al 1981;Stream Solute Workshop 1990). Nutrient spiraling couples nutrient uptake and release with downstream transport, and most studies of stream nutrient spiraling have been performed either in forested biomes (e.g., Tank et al 2000;Ashkenas et al 2004) or in stream systems minimally altered by human activities (e.g., Grimm and Fisher 1986;Dodds et al 2000).…”

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confidence: 99%

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Assimilatory uptake rather than nitrification and denitrification determines nitrogen removal patterns in streams of varying land use

Arango

Tank

Johnson

et al. 2008

Limnology & Oceanography

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Agricultural and urban land use increase nitrogen (N) concentrations in streams, which can saturate biotic demand by plants, algae, and bacteria via assimilative uptake, and by nitrification and denitrification. We studied six streams per year in each of three land-use categories (agricultural, urban, and forested) for 3 yr (n 5 18 streams), and we compared whole-stream N uptake and microbial N transformation rates during spring, summer, and autumn. We measured whole-stream removal of added ammonium (NH , nitrification, and denitrification rates approached saturation at higher inorganic N concentrations. Nitrification and denitrification rates measured in redox-optimized laboratory assays were roughly equivalent, suggesting that in situ redox conditions will determine whether stream sediments are a net source or sink of NO { 3 . Though nitrification and denitrification rates were measured under ideal redox conditions, they were always more than an order of magnitude lower than whole-stream NO

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“…ER can be an important assimilative mechanism for water column NO 3 -removal in streams (Fellows et al 2006;Hoellein et al 2007;Newbold et al 2006) and low ER in the buried reaches likely contributed to their reduced biological NO 3 -demand. In addition to functioning as a direct NO 3 -sink, ER can indirectly promote NO 3 -removal by creating the anoxic conditions necessary for denitrification, a type of anaerobic respiration in which NO 3 -is reduced to N 2 or N 2 O gas and permanently removed from the ecosystem ).…”

Section: Effect Of Stream Burial On Nomentioning

confidence: 99%

Effects of urban stream burial on organic matter dynamics and reach scale nitrate retention

et al. 2014

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Nitrogen (N) retention in streams is an important ecosystem service that may be affected by the widespread burial of streams in stormwater pipes in urban watersheds. We predicted that stream burial suppresses the capacity of streams to retain nitrate (NO 3 -) by eliminating primary production, reducing respiration rates and organic matter availability, and increasing specific discharge. We tested these predictions by measuring whole-stream NO 3 -removal rates using 15 -retention through a combination of hydrological and biological processes. The channel shape of two of the buried reaches increased specific discharge which enhanced NO 3 -transport from the channel, highlighting the relationship between urban infrastructure and ecosystem function. Uptake lengths in the buried reaches were further lengthened by low stream biological NO 3 -demand, as indicated by NO 3 -uptake velocities 17-fold lower than that of the open reaches. We also observed differences in the periphyton enzyme activity between reaches, indicating that the effects of burial cascade from the microbial to the ecosystem scale. Our results suggest that streamElectronic supplementary material The online version of this article

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Uptake of nutrients and organic C in streams in New York City drinking-water-supply watersheds

Cited by 83 publications

References 56 publications

Nutrient Uptake and Mineralization during Leaf Decay in Streams – a Model Simulation

Nutrient Uptake and Mineralization during Leaf Decay in Streams – a Model Simulation

Assimilatory uptake rather than nitrification and denitrification determines nitrogen removal patterns in streams of varying land use

Effects of urban stream burial on organic matter dynamics and reach scale nitrate retention

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