Nitrate and phosphate uptake in streams at Coweeta Hydrologic Laboratory

Webster, Jackson R.; D’Angelo, D. J.; Peters, Gregory T.

doi:10.1080/03680770.1989.11899048

Cited by 28 publications

(22 citation statements)

References 14 publications

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“…Previous summer studies of P uptake in HWC using short-term additions of phosphate also indicated that P uptake length was short (<50 m) and was controlled primarily by biotic processes (Webster et al 1991). The P uptake length measured in WB is within the range of previous summer measurements (98-164 m) and has also been previously shown to be controlled primarily by biotic processes (Newbold et al 1983;Mulholland et al 1990).…”

Section: P Uptakesupporting

confidence: 61%

Evidence that hyporheic zones increase heterotrophic metabolism and phosphorus uptake in forest streams

et al. 1997

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We used nondisruptive, whole-stream methods to measure hydraulic characteristics, ecosystem metabolism, and phosphorus cycling in the west fork of Walker Branch (WB), Tennessee and in Hugh White Creek (HWC), North Carolina. Although similar in many of their hydrological and chemical characteristics, transient storage zone volume in HWC was relatively large (-1.5 times that of the flowing water zone), whereas transient storage zone volume in WB was small (-0.1 times that of the flowing water zone). Both streams were highly heterotrophic (gross primary production : total respiration ratios

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Section: P Uptakesupporting

confidence: 61%

Evidence that hyporheic zones increase heterotrophic metabolism and phosphorus uptake in forest streams

et al. 1997

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“…Newbold et al 1981;Elwood et al 1981) demonstrated high biotic retention using radiotracer P additions kept below biotic saturation. Webster et al (1991) and Mulholland (1992) reported similar results from other oligotrophic streams using low SRP amendment. Mulholland et al (1990) compared uptake length at low (5-12 lg-P l -1 ) vs. high (84-163 lg-P l -1 ) SRP concentration.…”

Section: Introductionsupporting

confidence: 86%

Soluble reactive phosphorus (SRP) transport and retention in tropical, rain forest streams draining a volcanic landscape in Costa Rica: in situ SRP amendment to streams and laboratory studies

Triska

Pringle²,

Avanzino

et al. 2006

Biogeochemistry

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Soluble reactive phosphorus (SRP) transport/retention was determined in two rain forest streams (Salto, Pantano) draining La Selva Biological Station, Costa Rica. There, SRP levels can be naturally high due to groundwater enriched by geothermal activity within the surfically dormant volcanic landscape, and subsequently discharged at ambient temperature. Combined field and laboratory approaches simulated high but natural geothermal SRP input with the objective of estimating the magnitude of amended SRP retention within high and low SRP settings and determining the underlying mechanisms of SRP retention. First, we examined short-term SRP retention/transport using combined SRP-conservative tracer additions at high natural in situ concentrations. Second, we attempted to observe a DIN response during SRP amendment as an indicator of biological uptake. Third, we determined SRP release/retention using laboratory sediment assays under control and biologically inhibited conditions. Short-term in-situ tracer-SRP additions indicated retention in both naturally high and low SRP reaches. Retention of added SRP mass in Upper Salto (low SRP) was 17% (7.5 mg-P m -2 h -1 ), and 20% (10.9 mg-P m -2 h -1 ) in Lower Salto (high SRP). No DIN response in either nitrate or ammonium was observed. Laboratory assays using fresh Lower Salto sediments indicated SRP release (15.4 ± 5.9 lg-P g dry wt. -1 h -1 ), when incubated in filter sterilized Salto water at ambient P concentration, but retention when incubated in filter sterilized river water amended to 2.0 mg SRP l -1 (233.2 ± 5.8 lg-P g dry wt. -1 h -1 ). SRP uptake/release was similar in both control-and biocidetreated sediments indicating predominantly abiotic retention. High SRP retention even under biologically saturated conditions, absence of a DIN response to amendment, patterns of desorption following amendment, and similar patterns of retention and release under control and biologically inhibited conditions all indicated predominantly abiotic P flux.

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“…SRP uptake lengths in oligotrophic headwater streams usually range from less than 100 m (e.g., Webster et al, 1991;Hall et al, 2002;Schade et al, 2010;Gibson et al, 2015) to a few 100 m (e.g., Burrows et al, 2013). In contrast, most studies in agricultural headwater streams report extremely low SRP uptake capacities, often featuring uptake lengths of several kilometers (e.g., Macrae et al, 2003;Bernot et al, 2006;Gücker & Pusch, 2006).…”

Section: Discussionmentioning

confidence: 99%

The potential of agricultural headwater streams to retain soluble reactive phosphorus

Weigelhofer

2016

Hydrobiologia

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The study focuses on the capacity of agricultural headwater streams to retain soluble reactive phosphorus (SRP). In-stream phosphorus uptake was determined via short-term SRP additions in 14 reaches differing in channel morphology and riparian vegetation. In addition, zero equilibrium phosphorus concentrations (EPC 0 ) were estimated for 8 reaches based on adsorption experiments. Average SRP uptake lengths amounted to 3.8 km in channelized sections, 1.9 km in forested sections, and 0. ). EPC 0 ranged from 20 to 1,600 lg SRP l -1 and correlated positively with inorganic P and reductant-soluble P concentrations of the sediments. In 50% of the reaches, phosphorus was released from the sediments at initial water concentrations of up to 500 lg SRP l -1, indicating a high release potential. Although EPC 0 did not correlate with in-stream SRP uptake, sediments probably play a significant role for the P retention in agricultural headwater streams as they supply the benthic community with phosphorus from the subsurface. Thus, it is crucial that sediment-water interactions are considered in the restoration and management of agricultural headwater streams.

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Nitrate and phosphate uptake in streams at Coweeta Hydrologic Laboratory

Cited by 28 publications

References 14 publications

Evidence that hyporheic zones increase heterotrophic metabolism and phosphorus uptake in forest streams

Evidence that hyporheic zones increase heterotrophic metabolism and phosphorus uptake in forest streams

Soluble reactive phosphorus (SRP) transport and retention in tropical, rain forest streams draining a volcanic landscape in Costa Rica: in situ SRP amendment to streams and laboratory studies

The potential of agricultural headwater streams to retain soluble reactive phosphorus

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