An Assessment of the Phosphorus Retention Capacity of Wetlands in the Painter Creek Watershed, Minnesota, USA

Bruland, Gregory L.; Richardson, Curtis J.

doi:10.1007/s11270-005-9032-7

Cited by 46 publications

(37 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Richardson & Qian (1999) suggested that the P concentration in the outflow increases exponentially after a P loading threshold (1 g/m 2 /yr) has been exceeded, though wetlands may serve the function of reducing P transport to downstream water bodies even at higher loads than this. To be able to manage such wetlands for a sustained P retention, it is important to identify the dominant retention processes, whether it is sediment sorption of dissolved P (Bruland & Richardson, 2006), sedimentation of particulate P (Braskerud, 2002;Coveney et al, 2002;Koskiaho et al 2003) or biological P uptake, or a combination of all.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of a constructed wetland for retention of sediment-associated phosphorus

2011

View full text Add to dashboard Cite

A constructed wetland (2.1 ha; 2% of catchment area) in southeast Sweden, in a catchment with 35% arable land on clay soils, was investigated with respect to phosphorus (P) retention, focusing on particulate P (PP) and sediment accretion. The aims were to i) estimate P retention and identify the dominating retention processes; ii) investigate how well estimates of P retention based on inflow-outflow measurements compared with the amount of P accumulated in the sediment.In-and outflow of P was measured during four years with continuous flow measurements and flow proportional weekly composite samples. P in the accumulated sediment was estimated based on core samples and analyzed using sequential fractionation. Total P load during four years was 65 kg/ha and intensive sampling events detected 69% as PP. Based on inflow-outflow estimates the mean P retention was 2.8 kg/ha/yr, or 17%, but the amount of P accumulated in the inlet zone equated 78% of the TP load. This discrepancy showed the need to add studies of sediment accumulation to inflow-outflow estimates for an improved understanding of the P retention.The dominating P forms in the sediment were organic P (38%) and P associated with iron or aluminum (39%), i.e. potentially mobile forms. In areas colonized by Typha latifolia, the amount of P in the upper sediment layer (390 kg) was more than double the total P load of 136 kg.Cycling and release in those areas is a potential source of P that deserves further attention.3

show abstract

Section: Introductionmentioning

confidence: 99%

Efficiency of a constructed wetland for retention of sediment-associated phosphorus

2011

View full text Add to dashboard Cite

show abstract

“…Qual. 35:1975-1982(2006 Reproduced from Journal of Environmental Quality. Published by ASA, CSSA, and SSSA.…”

mentioning

confidence: 99%

Phosphorus Sorption by Sediments in a Southeastern Coastal Plain In‐Stream Wetland

Novak¹,

Watts²

2006

J of Env Quality

View full text Add to dashboard Cite

A close relationship has been reported between sediment organic C (SedOC) content and its P sorption capacity (P max ) and total P (TP) concentration. Phosphorus sorbed to organically complexed cations is a proposed explanation for this relationship. The objectives of this study were (i) to determine relationships between in-stream wetland SedOC content and both the sediment's P max and TP concentrations, and (ii) to ascertain the role of both organically complexed and oxalate-extractable cations on the sediment P max and TP values. The sediment's oxalate-extractable Fe (Fe ox ) and Al (Al ox ) contents were determined using acidified ammonium oxalate, while sodium pyrophosphate was used to extract organically complexed cations (Al pryo , Ca pyro , Fe pyro , Mg pyro , and Mn pyro ). Both the sediment's P max and TP contents were strongly correlated with its SedOC concentration (r 2 .0.90, P , 0.001). Only the Al ox contents were significantly correlated with TP and P max , suggesting that amorphous Al forms have an important role in P sorption. All five pyrophosphate-extracted cations were significantly correlated with SedOC contents. Regression analyses showed that the Al pyro accounted for 88% of the variation in sediment P max values, whereas a combination of Al pyro and Ca pyro accounted for 98% of the variation in sediment TP concentrations. Additionally, Al and Ca chelated by SedOC compounds also have an important role in P binding and indicate that a linkage exists between the wetlands SedOC and P max content and its ability to accumulate TP. This study identified that two different mechanisms have significant roles in regulating P sorption by sediments in a southeastern Coastal Plain in-stream wetland. WETLANDS have an important role in influencing P concentrations in streams, rivers, and estuaries along the southeastern U.S. coast (Reddy et al., 1999). Wetlands can act as a sink for P (Reddy et al., 1999;Novak et al., 2004). If wetlands are overloaded with P, however, they can release P, thereby acting as a source (Richardson, 1999;Novak et al., 2004). A wetland's P sink-source relationship is controlled by biological, physical, and chemical processes that function in the wetland's water column and underlying sediment. Biological processes (i.e., macrophytes and algae) can account for 10 to 50% of P binding in the water column and sediment pore water (Haggard et al., 1999;Richardson, 1999). On the other hand, physical and chemical processes associated with soils and sediments can bind between 80 and 90% of P that flows through wetlands (Richardson, 1999 (Richardson, 1985;Reddy et al., 1995Reddy et al., , 1999, redox status (Golterman, 1995), and the SedOC content (McDowell et al., 2003;Hogan et al., 2004;Wang et al., 2005;Bruland and Richardson, 2006).The involvement of Fe and Al oxides and hydroxides in P binding by wetland sediments is well established; however, the mechanism that promotes P binding by SedOC remains unclear. Phosphorus sorption by organic C (OC) structures is unlikely, because...

show abstract

“…Phosphorus retention can decrease under reducing conditions in wetland soils with the release of P from Fe complexes following reduction of Fe from Fe +3 to Fe +2 (Patrick et al 1973), and under sufficiently reducing conditions, the binding of Fe by sulfides can further enhance P release (Brigham et al 2001;Caraco et al 1989). Under the anaerobic conditions needed for effective removal of NO 3 through denitrification, wetlands with high levels of calcite and exchangeable Ca are more likely to retain P due to insoluble, Ca-bound P (Bruland and Richardson 2006;Richardson 1999). However, wetlands can become P sources if sediments are remobilized (Mitsch et al 2005b), and additional research is needed to document the longterm effectiveness of wetlands as P sinks and to understand conditions under which stored P might be released.…”

Section: Figurementioning

confidence: 99%

Assessment of beyond-the-field nutrient management practices for agricultural crop systems with subsurface drainage

Kalcic¹,

Crumpton²,

Liu³

et al. 2018

Journal of Soil and Water Conservation

View full text Add to dashboard Cite

This paper reviews the characteristics, benefits, and drawbacks of agricultural ditches and wetlands, as well as strategies for applying agricultural best management practices (BMPs) at the watershed scale for improving water quality. This synthesis focuses on the Great Lakes Region and the Mississippi River Basin in the United States, and specifically crop production systems in watersheds with subsurface drainage. The USDA Natural Resources Conservation Service (NRCS) has developed conservation practice standards for open channels and wetlands, which mitigate nutrient and sediment loading to surface water bodies from agricultural lands. Practices that use agricultural ditches to improve water quality, such as the two-stage ditch, have emerged in the last two decades and are starting to see a greater application in the region. Using wetlands as water treatment systems has a long history in a range of settings and over the past several decades is seeing more widespread application in agriculture. Water quality and watershed models are increasingly used to develop watershed strategies for reducing nutrient exports with agricultural BMPs. Models are also helpful in evaluating combinations of practices from the farm scale to the watershed scale. Application and limitations of several models commonly used in these regions of the United States are discussed. Finally, successful conservation strategies at the watershed scale must consider the human dimensions of watershed management, and we summarize the literature in this region on farmer perceptions and adoption of practices.

show abstract

An Assessment of the Phosphorus Retention Capacity of Wetlands in the Painter Creek Watershed, Minnesota, USA

Cited by 46 publications

References 25 publications

Efficiency of a constructed wetland for retention of sediment-associated phosphorus

Efficiency of a constructed wetland for retention of sediment-associated phosphorus

Phosphorus Sorption by Sediments in a Southeastern Coastal Plain In‐Stream Wetland

Assessment of beyond-the-field nutrient management practices for agricultural crop systems with subsurface drainage

Contact Info

Product

Resources

About