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 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.

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 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.

Soil Phosphorus Release and Storage Capacity from an Impacted Subtropical Wetland

2010 ◽  
Vol 74 (5) ◽  
pp. 1816-1825 ◽  
Author(s):  
Jehangir H. Bhadha ◽  
Willie G. Harris ◽  
James W. Jawitz
Keyword(s):  
Storage Capacity ◽  
Soil Phosphorus ◽  
Phosphorus Release ◽  
Subtropical Wetland ◽  
And Storage

scholarly journals Intra-population strain variation in phosphorus storage strategies of the freshwater cyanobacterium Raphidiopsis raciborskii

2020 ◽  
Vol 96 (6) ◽  
Author(s):  
Man Xiao ◽  
David P Hamilton ◽  
Ann Chuang ◽  
Michele A Burford
Keyword(s):  
Growth Rates ◽  
Storage Capacity ◽  
Inorganic Nitrogen ◽  
Inorganic Phosphorus ◽  
Strain Variation ◽  
Short Term ◽  
And Storage ◽  
P Addition ◽  
Phosphorus Storage ◽  
Process Based Models

ABSTRACT Several cyanobacteria, including diazotrophic Raphidiopsis raciborskii, can form harmful blooms when dissolved inorganic phosphorus concentrations are very low. We hypothesized that R. raciborskii strains would vary in phosphorus (P) allocations to cell growth and storage, providing resilience of populations to continuously low or variable P supplies. We tested this hypothesis using six toxic strains (producing cylindrospermopsins) isolated from a field population using batch monocultures with and without P and dissolved inorganic nitrogen (DIN). Treatments replete with DIN, irrespective of P addition, had similar exponential growth rates for individual strains. P storage capacity varied 4-fold among strains and was significantly higher in DIN-free treatments than in replete treatments. P was stored by all R. raciborskii strains, in preference to allocation to increase growth rates. P stores decreased with increased growth rate across strains, but weeere not related to the time to P starvation in P-free treatments. The storage capacity of R. raciborskii, combined with strategies to efficiently uptake P, means that P controls may not control R. raciborskii populations in the short term. Intra-population strain variation in P storage capacity will need to be reflected in process-based models to predict blooms of R. raciborskii and other cyanobacteria adapted to low-P conditions.

Sign in / Sign up

Export Citation Format

Share Document