Phosphorus retention in non-tidal palustrine forssted wetlands of the mid-atlantic region

Walbridge, Mark R.; Struthers, Judith P.

doi:10.1007/bf03160868

Cited by 67 publications

(39 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4). Th ese fi ndings are similar to those of Edis et al (2002) for alluvial fl oodplain soils in tropical Northeast Queensland, Australia, and those summarized by Walbridge and Struthers (1993) for palustrine forested wetland soils in the Atlantic coastal plain of the USA. Th ese investigators found that P retention could be predicted solely by Al OX concentration and inclusion of Fe OX in the model did not increase the variability explained even for Fe OX rich soils.…”

Section: Prediction Of Drp Wesupporting

confidence: 77%

Macronutrients in Hawaii's Coastal Wetland Pastures and Potential Phosphorus Release to Water

et al. 2011

View full text Add to dashboard Cite

Coastal wetland pastures in Hawaii are based on naturalized hilograss (Paspalum conjugatum Bergius) and paragrass [Brachiaria mutica (Forssk.) Stapf] growing primarily on moderately acid (pH 5.4) to mildly alkaline (pH 7.8) and mildly calcareous (<50 g kg−1 CaCO3 equivalent [CCE]) Aquepts and Aquolls. Nutrient concentration, distribution, and P retention dynamics have not been quantified for these ecologically important grazing lands. Soil and forage samples were collected from three pastures at each of six sites, with three sites representing each grass. In addition, pastures at one of the hilograss sites were subjected to zonal sampling with zones determined by distance from shade and drainage ditch borders (animal lounging areas). Soil total N, and exchangeable K and Na accumulated in shaded areas, and forage N, δ15N (‰), and K tended to follow a similar distribution. Across sites hilograss had very high and probably toxic S concentrations (5.6 to 11.0 g kg−1) for cattle (Bos spp.) compared with paragrass, which had S concentrations (1.9 to 4.0 g kg−1) within the expected range for tropical forage grasses. Across sites and the 0‐ to 15‐ and 15‐ to 30‐cm soil depths, satisfactory predictive relationships (n = 54) were obtained between dissolved (<0.45‐μm pore diameter) molybdate‐reactive P (DRP) desorbed from soil in a water extract (DRPWE) and Olsen extractable P (POLSEN) and the oxalate extractable molybdate‐reactive P (RPOX) saturation index (PSIOXRP). Oxalate extractable Al (AlOX) was a more important component of PSIOXRP than oxalate extractable Fe (FeOX), which could be omitted.

show abstract

Section: Prediction Of Drp Wesupporting

confidence: 77%

Macronutrients in Hawaii's Coastal Wetland Pastures and Potential Phosphorus Release to Water

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Similarly, the PSI values (Eq. 9) were highly correlated with oxalate extractable Fe and Al of several wetland soils (Walbridge and Struthers, 1993). Carman and Wulff (1989) measured the P sorption capacities of different sediments from the Baltic sea and showed that the shallow oxidized sediments function as major sinks for P from the water column.…”

Section: A Laboratory Methods-batch Incubation Studiesmentioning

confidence: 98%

“…This index is measured at P concentration at the upper-end scale of an isotherm. This method was later applied for wetland soils by Walbridge and Struthers (1993). Single point isotherms cannot provide parameters such as K, EPC, and S 0 , which are critical in describing P retention characteristics of soils and sediments.…”

Section: A Laboratory Methods-batch Incubation Studiesmentioning

confidence: 99%

“…Maximum P retention capacity of soil/sediment is generally reached following saturation of all sorption sites. Several researchers have reported significant correlations between amorphous and poorly crystalline forms of Fe and Al, with P retention maximum of soils (Berkheiser et al, 1980;Khalid et al, 1977;Richardson, 1985;Walbridge and Struthers, 1993;Gale et al, 1994). This suggests that P sorption in soils/sediments is associated with amorphous and poorly crystalline forms of Fe and Al.…”

Section: Retention and Release Of Phosphorus By Soils And Sedimentsmentioning

confidence: 96%

See 1 more Smart Citation

Phosphorus Retention in Streams and Wetlands: A Review

Reddy

Kadlec

Flaig

et al. 1999

Critical Reviews in Environmental Science and Technology

850

605

View full text Add to dashboard Cite

Copyright© 1999, CRC Press LLC -Files may be downloaded for personal use only. Reproduction of this material without the consent of the publisher is prohibited. 83Critical Reviews in Environmental Science and Technology, 29(1):83--146 (1999) ABSTRACT : Wetlands and streams buffer the interactions among uplands and adjacent aquatic systems. Phosphorus (P) is often the key nutrient found to be limiting in both estuarine and freshwater ecosystems. As such, the ability of wetlands and streams to retain P is key to determining downstream water quality. This article reviews the processes and factors regulating P retention in streams and wetlands and evaluates selected methodologies used to estimate P retention in these systems. Phosphorus retention mechanisms reviewed include uptake and release by vegetation, periphyton and microorganisms; sorption and exchange reactions with soils and sediments; chemical precipitation in the water column; and sedimentation and entrainment. These mechanisms exemplify the combined biological, physical, and chemical nature of P retention in wetlands and streams. Methodologies used to estimate P retention include empirical input-output analysis and mass balances, and process kinetics applied at various scales, including micro-and mesocosms to full-scale systems. Although complex numerical models are available to estimate P retention and transport, a simple understanding of P retention at the process level is important, but the overall picture provided by mass balance and kinetic evaluations are often more useful in estimating long-term P retention.

show abstract

“…The majority (67%) of these wetlands are found along small drainageways, with much smaller percentages in flatwoods, along major river floodplains, and in deepwater swamps, respectively (Table 1). In Caroline County, VA for example, non-tidal palustrine forested wetlands comprise 66% of the total wetland area of 11,372 ha; these are primarily small seasonally (4000 ha) and temporarily (1596 ha) flooded palustrine forested wetlands dominated by hardwoods (PFO 1C's and PFO 1A's, respectively) along stream drainages, averaging 5.4 and 2.4 ha in area, respectively (Walbridge and Struthers 1993). Eighty-six percent of the forested wetlands in the Southeast are bottomland (68%) or other (18%) hardwoods (Table 2).…”

Section: Introductionmentioning

confidence: 99%

Effects of forest management on biogeochemical functions in southern forested wetlands

Walbridge

Lockaby

1994

Wetlands

Self Cite

View full text Add to dashboard Cite

Southern forested wetlands perform two important biogeochemical functions on the landscape: 1) nutrient (N and P) removal from incident surface, subsurface, and ground waters, and 2) export of organic carbon and associated nutrients to aquatic ecosystems downstream, tn addition to P sediment deposition. which can range from 1.6 to 36.0 kg ha -t yr -a P, denitrification of NO3-N (0.5 to 350 kg ha i yr ') and P adsorption (130 to 199 kg ha k yr ') can be important mechanisms associated with N and P removal, respectively'. Biological processes, uptake by plants (15.0 to 51.8 kg ha-' yr-' for N; 0.2 to 3.8 kg ha -t yr-' for P) and microorganism absorption (16.2 to 87.0 kg ha-' yr -~ for N; 6.6 to 40.0 kg ha -~ yr -t for P) are also important and are intimately associated with organic matter export. Clearcut harvests (ground-based or aerial), followed by natural regeneration, are the most common silvicultural techniques used in forested floodplains in the South. Ground-based methods have been shown to increase soil bulk density and decrease hydraulic conductivity and redox potential in wetter soils. In addition to the increases in soil temperature and soil wetness that frequently occur following forest harvesting, these added effects may be responsible for the reduced productivity and altered species composition observed following ground-based vs. aerial harvests. Changes in denitrificalion will be a function of the degree to which harvesting affects soil redox potential, substrate (C) availability, and nitrate production. In theory, denitrification rates should increase following harvesting, but low nitrate availability in acid soils may limit this effect. The effects of harvesting on P adsorption processes in forested wetland soils have not been studied. Reductions in plant uptake and litterfall and changes in species composition following harvesting could alter both nutrient retention/transformation and organic C export functions. On wetter sites, canopy removal may stimulate algal populations, providing a short-term mechanism for conserving geochemical exports. Clearcut harvest systems that minimize alterations in soil hydrology and promote rapid vegetation regrowth should have the least effect on biogeochemical functions in southern forested wetlands.

show abstract

Phosphorus retention in non-tidal palustrine forssted wetlands of the mid-atlantic region

Cited by 67 publications

References 48 publications

Macronutrients in Hawaii's Coastal Wetland Pastures and Potential Phosphorus Release to Water

Macronutrients in Hawaii's Coastal Wetland Pastures and Potential Phosphorus Release to Water

Phosphorus Retention in Streams and Wetlands: A Review

Effects of forest management on biogeochemical functions in southern forested wetlands

Contact Info

Product

Resources

About