scholarly journals Seal Tightly and Store in a Cool Dry Place: Exploring Soil Phosphorus Storage in a Subtropical Treatment Wetland.

2021 ◽  
Author(s):  
Paul Julian II ◽  
Todd Z. Osborne ◽  
Vimala D. Nair
Keyword(s):  
Storage Capacity ◽  
Soil Depth ◽  
Soil Phosphorus ◽  
Stormwater Treatment ◽  
Treatment Wetland ◽  
Wetland Ecosystems ◽  
Soil P ◽  
Iron Aluminum ◽  
Variable Condition ◽  
Phosphorus Storage

Abstract Oligotrophic wetlands of the Everglades are often the final recipients of nutrients from adjacent ecosystems and tend to accumulate phosphorus (P) in their soils. Understanding P source and sink dynamics in wetlands are critical for managing wetland ecosystems and protecting downstream resources. In this study, soil P storage capacity (SPSC) was evaluated within two treatment flow-ways of the Everglades Stormwater Treatment Areas (STAs). This study hypothesized that SPSC will vary between flow-ways, soil depth, and spatially along the inflow-to-outflow gradient. The P storage capacity in the STAs depend on the proportion of iron, aluminum, calcium, and magnesium (Fe, Al, Ca, and Mg, respectively) to P with floc and recently accreted soils (RAS) being associated more with Ca and Mg and pre-STA soils being associated more with Fe and Al. Phosphorus loss, as indicated from SPSC values would vary between systems and soil depths suggesting a variable condition of P sink and source within and along flow-ways. This result, while limited, demonstrates the applicability of SPSC to wetlands systems and provides information that will aid operational or management decisions associated with improving P retention of the Everglades STAs.

scholarly journals Soil Phosphorus Storage Capacity for Environmental Risk Assessment

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Vimala D. Nair ◽  
Willie G. Harris
Keyword(s):  
Risk Assessment ◽  
Storage Capacity ◽  
Soil Phosphorus ◽  
Cost Effective ◽  
Threshold Value ◽  
Molar Ratio ◽  
Soil P ◽  
Risk Assessment And Management ◽  
Previous Loading ◽  
Phosphorus Storage

Reliable techniques must be developed to predict phosphorus (P) storage and release from soils of uplands, ditches, streams, and wetlands in order to better understand the natural, anthropogenic, and legacy sources of P and their impact on water quality at a field/plot as well as larger scales. A concept called the “safe” soil phosphorus storage capacity (SPSC) that is based on a threshold phosphorus saturation ratio (PSR) has been developed; the PSR is the molar ratio of P to Fe and Al, and SPSC is a PSR-based calculation of the remaining soil P storage capacity that captures risks arising from previous loading as well as inherently low P sorption capacity of a soil. Zero SPSC amounts to a threshold value below which P runoff or leaching risk increases precipitously. In addition to the use of the PSR/SPSC concept for P risk assessment and management, and its ability to predict isotherm parameters such as the Langmuir strength of bonding,KL, and the equilibrium P concentration, EPC0, this simple, cost-effective, and quantitative approach has the potential to be used as an agronomic tool for more precise application of P for plant uptake.

Laboratory Validation of Soil Phosphorus Storage Capacity Predictions for Use in Risk Assessment

2007 ◽  
Vol 71 (5) ◽  
pp. 1564-1569 ◽  
Author(s):  
M. Chrysostome ◽  
V. D. Nair ◽  
W. G. Harris ◽  
R. D. Rhue
Keyword(s):  
Risk Assessment ◽  
Storage Capacity ◽  
Soil Phosphorus ◽  
Phosphorus Storage

scholarly journals An evaluation of soil phosphorus storage capacity (SPSC) at proposed wetland restoration locations in the western Lake Erie Basin

2021 ◽  
Author(s):  
Jacob Berkowitz ◽  
Christine VanZomeren ◽  
Nia Hurst ◽  
Kristina Sebastian
Keyword(s):  
Wetland Restoration ◽  
Lake Erie ◽  
Storage Capacity ◽  
Wetland Management ◽  
Soil Phosphorus ◽  
Land Use Patterns ◽  
Soil P ◽  
Western Lake ◽  
Western Lake Erie ◽  
P Sources

Historical loss of wetlands coupled with excess phosphorus (P) loading at watershed scales have degraded water quality in portions of the western Lake Erie Basin (WLEB). In response, efforts are underway to restore wetlands and decrease P loading to surface waters. Because wetlands have a finite capacity to retain P, researchers have developed techniques to determine whether wetlands function as P sources or sinks. The following technical report evaluates the soil P storage capacity (SPSC) at locations under consideration for wetland restoration in collaboration with the Great Lakes Restoration Initiative (GLRI) and the H2Ohio initiative. Results indicate that the examined soils display a range of P retention capacities, reflecting historic land-use patterns and management regimes. However, the majority of study locations exhibited some capacity to sequester additional P. The analysis supports development of rankings and comparative analyses of areas within a specific land parcel, informing management through design, avoidance, removal, or remediation of potential legacy P sources. Additionally, the approaches described herein support relative comparisons between multiple potential wetland development properties. These results, in conjunction with other data sources, can be used to target, prioritize, justify, and improve decision-making for wetland management activities in the WLEB.

Soil phosphorus storage capacity as affected by repeated phosphorus addition in an Ultisol

2020 ◽  
Vol 51 (14) ◽  
pp. 1960-1968
Author(s):  
Xinghong Xu ◽  
Yanling Wang ◽  
Hailin Zhang ◽  
Dan Yin ◽  
Biswanath Dari ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Soil Phosphorus ◽  
Phosphorus Addition ◽  
Phosphorus Storage

scholarly journals Evaluation of nutrient stoichiometric relationships amongst ecosystem compartments of a subtropical treatment wetland. Do we have “Redfield Wetlands”?

2017 ◽  
Author(s):  
Paul Julian ◽  
Stefan Gerber ◽  
Rupesh K Bhomia ◽  
Jill King ◽  
Todd Z. Osborne ◽  
...  
Keyword(s):  
Water Column ◽  
Biogeochemical Cycling ◽  
Terrestrial Ecosystems ◽  
South Florida ◽  
Ground Vegetation ◽  
Stormwater Treatment ◽  
Nutrient Stoichiometry ◽  
Treatment Wetland ◽  
Wetland Ecosystems ◽  
P Limitation

AbstractBackgroundEvaluation of carbon (C), nitrogen (N) and phosphorus (P) ratios in aquatic and terrestrial ecosystems can advance our understanding of biological processes, nutrient cycling and the fate of organic matter (OM) in these ecosystems. Eutrophication of aquatic ecosystems can change the accumulation and decomposition of OM which can alter biogeochemical cycling and alter the base of the aquatic food web. This study investigated nutrient stoichiometry within and among wetland ecosystem compartments (i.e. water column, flocculent, soil and above ground vegetation biomass) of two sub-tropical treatment wetlands with distinct vegetation communities. Two flow-ways (FWs) within the network of Everglades Stormwater Treatment Areas in south Florida (USA) were selected for this study. We evaluated nutrient stoichiometry of these to understand biogeochemical cycling and controls of nutrient removal in a treatment wetland within an ecological stoichiometry context.ResultsThis study demonstrates that C, N, and P stoichiometry can be highly variable among ecosystem compartments and between FWs. Power law slopes of C, N and P within surface water floc, soil and vegetation were significantly different between and along FWs.ConclusionsAssessment of wetland nutrient stoichiometry between and within ecosystem compartments suggests unconstrained stoichiometry related to P that conforms with the notion of P limitation in the ecosystem. Differences in N:P ratios between floc and soil suggest different pathways of organic nutrient accumulation and retention between FWs. Surface nutrient stoichiometry was highly variable and decoupled (or closed to decoupled, by our criteria), in particular with respect to P. We hypothesize that decoupling may be the imprint of variability in inflow nutrient stoichiometry. However, despite active biogeochemical cycles that could act to restore nutrient stoichiometry along the FW, there was little evidence that such balancing occurred, as the degree of stochiometric decoupling in the water column did change with distance downstream. This information is only the beginning of a larger journey to understand stoichiometric processes within wetland ecosystems and how it related to ecosystem function.

scholarly journals Alkaline Phosphomonoesterase-Harboring Microorganisms Mediate Soil Phosphorus Transformation With Stand Age in Chinese Pinus massoniana Plantations

2020 ◽  
Vol 11 ◽  
Author(s):  
Yueming Liang ◽  
Mingjin Li ◽  
Fujing Pan ◽  
Jiangming Ma ◽  
Zhangqi Yang ◽  
...  
Keyword(s):  
Organic Phosphorus ◽  
Soil Depth ◽  
Soil Phosphorus ◽  
Pinus Massoniana ◽  
Stand Age ◽  
P Fractions ◽  
Soil P ◽  
Soil P Fractions ◽  
Alkaline Phosphomonoesterase ◽  
Phosphorus Transformation

phoD-harboring microorganisms facilitate mineralization of organic phosphorus (P), while their role in the regulation of soil P turnover under P-limited conditions in Pinus massoniana plantations is poorly understood. The aim of the present study was to investigate the effects of stand age and season on soil P fractions and phoD-harboring microorganism communities in a chronosequence of Chinese P. massoniana plantations including 3, 19, and 58 years. The soil P fractions (i.e., CaCl2-P, citrate-P, enzyme-P, and HCl-P) varied seasonally, with the higher values observed in the rainy season. The concentrations of the fractions were higher in old plantation (OP) soils and lower in young planation (YP) soils in both seasons. The OTU abundances were negatively correlated with total available P concentration, while were positively correlated with alkaline phosphomonoesterase (ALP) activity at 0–10 cm soil depth. The results indicate that phoD-harboring microorganisms have great potential to mineralize organic P under P-poor conditions and highlights those microorganisms are indicators of P bioavailability in P. massoniana plantations.

Improved Plant Diversity as a Strategy to Increase Available Soil Phosphorus

2019 ◽  
Vol 103 (1) ◽  
pp. 43-45 ◽  
Author(s):  
Carlos Crusciol ◽  
João Rigon ◽  
Juliano Calonego ◽  
Rogério Soratto
Keyword(s):  
Crop Yields ◽  
Soil Phosphorus ◽  
Cropping System ◽  
P Availability ◽  
P Fractions ◽  
Crop Species ◽  
Soil P ◽  
Residue Decomposition ◽  
Available Soil Phosphorus ◽  
Crop Residue Decomposition

Some crop species could be used inside a cropping system as part of a strategy to increase soil P availability due to their capacity to recycle P and shift the equilibrium between soil P fractions to benefit the main crop. The release of P by crop residue decomposition, and mobilization and uptake of otherwise recalcitrant P are important mechanisms capable of increasing P availability and crop yields.

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