Nutrient Retention, Nutrient Limitation, and Sediment-Nutrient Interactions in a Pasture-Dominated Stream

Chaubey, Indrajeet; Sahoo, Dillip Kumar; Haggard, Brian E.; Matlock, Marty D.; Costello, Thomas A.

doi:10.13031/2013.22409

Cited by 17 publications

(10 citation statements)

References 34 publications

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“…This was likely due to high P storage in sediments of these ditches as mentioned in the discussion above. However, measured PSI values were similar to values reported for agricultural streams and consistent with the range of PSI values reported for other agricultural drainage ditches in Indiana [37,38,44,1]. This study indicates that sediments in drainage ditches could already have high P content due to high P loadings from surrounding fields to the drainage ditches.…”

Section: Phosphorus Uptake Of Upstream and Downstream Sedimentssupporting

confidence: 88%

“…Except some differences, there were no particular spatial variations in the data when upstream and downstream sediments from tile outlets were compared for equilibrium characteristics (p > 0.10; Table 4). The source characteristic of sediments in Box Ditch and Marshall Ditch during AprJun is comparable to previous studies [37]. Apr-Jun coincides with a period of high flow season in this region and elevated P in runoff resulted in the source characteristic of sediments.…”

Section: Chemical Characteristics Of the Ditch Water Columnsupporting

confidence: 87%

“…Previous studies have quantified sediment-nutrient interactions using P sorption index (PSI), sediment equilibrium phosphorus concentration (EPC0), and easily exchangeable P (ExP), and easily exchangeable N [36][37][38]. Original or modified methods have been used in previous investigations to measure EPC0, PSI, ExP, and ExN in sediments [38][39][40][41][42][43][44][45].…”

Section: Laboratory Techniquesmentioning

confidence: 99%

“…The amount of P sorbed was plotted against the initial concentration of P in each soil solution and the sediment EPC 0 was estimated as the x-intercept of the regression line [38][39][40]. Sediment EPC0 is an equilibrium concentration at which the net exchange rate of P between benthic sediments and the water column is negligible [12,37,40].…”

Section: Laboratory Techniquesmentioning

confidence: 99%

“…The ExP content in sediments is the amount of P loosely bound to benthic sediments and readily available for release from sediments into the water column [12,37]. The ExP was determined by adding 100 mL of 1M of MgCl 2 to approximately 25 g of wet sediment in a 250 mL Erlenmeyer flask followed by an extraction similar to the sediment EPC 0 and PSI described above.…”

Section: Laboratory Techniquesmentioning

confidence: 99%

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Nutrient Content at the Sediment-Water Interface of Tile-Fed Agricultural Drainage Ditches

Ahiablame

Chaubey

Smith

2010

Water

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Extensive network of tile drains present in the Midwest USA accelerate losses of nutrients to receiving ditches, rivers and eventually to the Gulf of Mexico. Nutrient inputs from agricultural watersheds and their role in affecting water quality have received increased attention recently; however, benthic sediment-nutrient interactions in tile-fed drainage ditches is still a matter of active research in consideration to nutrient discharge from tile drains. In this study, phosphorus (P) and nitrogen (N) contents and variability of nutrient retention ability of benthic sediments upstream and downstream from tile drain outlets were evaluated in managed agricultural drainage ditches in Indiana. Sediment samples were collected every three months upstream and downstream from selected tile drains in three ditches in northwest Indiana. Sediment equilibrium P concentrations (EPC0) were measured to examine P adsorption-desorption and equilibrium characteristics of benthic sediments in the ditches. P sorption index (PSI), exchangeable P (ExP), and exchangeable NH 4 + -N (ExN) were measured to evaluate nutrient retention ability and readily available nutrient content of benthic sediments. Results indicated a dynamic interaction between benthic sediment and overlying water column where sediments were acting as a sink or a source of P. There were no differences in nutrient retention ability between sediments collected upstream and sediments collected downstream from the selected tile drains. While the data, except for ExN, was comparable to reported values by previous studies in Indiana's drainage ditches, there was no particular seasonal pattern in the content of exchangeable nutrient content in sediments at all three sites. This study also OPEN ACCESSWater 2010, 2 412 suggested that nutrient uptake by benthic sediments in these drainage ditches is not always efficient; therefore watershed management should focus on minimizing the delivery of nutrients into ditches while maintaining their drainage functionality.

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Section: Phosphorus Uptake Of Upstream and Downstream Sedimentssupporting

confidence: 88%

Section: Chemical Characteristics Of the Ditch Water Columnsupporting

confidence: 87%

Section: Laboratory Techniquesmentioning

confidence: 99%

Section: Laboratory Techniquesmentioning

confidence: 99%

Section: Laboratory Techniquesmentioning

confidence: 99%

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Nutrient Content at the Sediment-Water Interface of Tile-Fed Agricultural Drainage Ditches

Ahiablame

Chaubey

Smith

2010

Water

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Climate extremes dominating seasonal and interannual variations in carbon export from the Mississippi River Basin

Tian

Ren

Yang

et al. 2015

Global Biogeochemical Cycles

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Knowledge about the annual and seasonal patterns of organic and inorganic carbon (C) exports from the major rivers of the world to the coastal ocean is essential for our understanding and potential management of the global C budget so as to limit anthropogenic modification of global climate. Unfortunately our predictive understanding of what controls the timing, magnitude, and quality of C export is still rudimentary. Here we use a process-based coupled hydrologic/ecosystem biogeochemistry model (the Dynamic Land Ecosystem Model) to examine how climate variability and extreme events, changing land use, and atmospheric chemistry have affected the annual and seasonal patterns of C exports from the Mississippi River basin to the Gulf of Mexico. Our process-based simulations estimate that the average annual exports of dissolved organic C (DOC), particulate organic C (POC), and dissolved inorganic C (DIC) in the 2000s were 2.6 ± 0.4 Tg C yr À1 , 3.4 ± 0.3 Tg C yr À1, and 18.8 ± 3.4 Tg C yr À1, respectively. Although land use change was the most important agent of change in C export over the past century, climate variability and extreme events (such as flooding and drought) were primarily responsible for seasonal and interannual variations in C export from the basin. The maximum seasonal export of DIC occurred in summer while for DOC and POC the maximum occurred in winter. Relative to the 10 year average (2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010), our modeling analysis indicates that the years of maximal and minimal C export cooccurred with wet and dry years (2008: 32% above average and 2006: 32% below average). Given Intergovernmental Panel on Climate Change-predicted changes in climate variability and the severity of rain events and droughts of wet and dry years for the remainder of the 21st century, our modeling results suggest major changes in the riverine link between the terrestrial and oceanic realms, which are likely to have a major impact on C delivery to the coastal ocean.

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Sustainability Assessment of Jumar River in Ranchi District of Jharkhand using River Sustainability Bayesian Network (RSBN) model Approach

Kumari

Pandey

2022

Ecological Significance of River Ecosystems

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Nutrient Retention, Nutrient Limitation, and Sediment-Nutrient Interactions in a Pasture-Dominated Stream

Abstract: ABSTRACT. Even though agricultural land use is a principal source of nonpoint-source pollution, the in-stream

Cited by 17 publications

References 34 publications

Nutrient Content at the Sediment-Water Interface of Tile-Fed Agricultural Drainage Ditches

Nutrient Content at the Sediment-Water Interface of Tile-Fed Agricultural Drainage Ditches

Climate extremes dominating seasonal and interannual variations in carbon export from the Mississippi River Basin

Sustainability Assessment of Jumar River in Ranchi District of Jharkhand using River Sustainability Bayesian Network (RSBN) model Approach

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