A shortened algal growth potential test

Schultz, Donald A.; Raschke, R. L.; Jones, Roxanne

doi:10.1007/bf00546276

Cited by 5 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A growth assay using Selenastrum capricornutum Printz (Schultz et al 1994) was utilized to assess the effects of nutrients and toxicants on algal growth. Selenastrum capricornutum was purchased from the University of Texas Culture Collection, Austin, Texas and transferred to a 125 mL flask containing 50 mL of dilute nutrient media (1/30th strength Bolds 1 NV media; 25 mg salts/L).…”

Section: Selenastrum Capricornutum Growth Assaysmentioning

confidence: 99%

See 1 more Smart Citation

Impacts of Nonpoint-Source Pollution on the Structure of Diatom Assemblages, Whole-Stream Oxygen Metabolism, and Growth of Selenastrum capricornutum in the Red River Watershed of North-Central Tennessee

et al. 2011

View full text Add to dashboard Cite

Section: Selenastrum Capricornutum Growth Assaysmentioning

confidence: 99%

mentioning

confidence: 99%

Impacts of Nonpoint-Source Pollution on the Structure of Diatom Assemblages, Whole-Stream Oxygen Metabolism, and Growth of Selenastrum capricornutum in the Red River Watershed of North-Central Tennessee

et al. 2011

View full text Add to dashboard Cite

“…Its purpose is to provide an indication of the amount of nutrients biologically available to support algal growth, as opposed to analytical methodologies that measure the total amount of specific nutrients of which only a portion may be biologically available. The specific methodology used by EPA Region IV was based on the standard method but included a modification by [22] to speed the analytical process [19]. As a surrogate measurement of nutrient concentration, higher values indicate higher levels of nutrients.…”

Section: Algal Growth Potential Testmentioning

confidence: 99%

“…A bioassay is performed in the laboratory on aliquots of filtered water collected from the site using standard methodology [21] by Schultz et al [22]. As a surrogate measurement of nutrient concentration, higher values indicate higher levels of nutrients.…”

Section: Agpt Algal Growth Potential Testmentioning

confidence: 99%

Partial Least Square Analyses of Landscape and Surface Water Biota Associations in the Savannah River Basin

Nash

Chaloud

2011

ISRN Ecology

View full text Add to dashboard Cite

Ecologists are often faced with problem of small sample size, correlated and large number of predictors, and high noise-to-signal relationships. This necessitates excluding important variables from the model when applying standard multiple or multivariate regression analyses. In this paper, we present the results of applying PLS to explore relationships among biotic indicators of surface water quality and landscape conditions accounting for the above problems. Available field sampling and remotely sensed data sets for the Savannah Basin are used. We were able to develop models and compare results for the whole basin and for each ecoregion (Blue Ridge, Piedmont, and Coastal Plain) in spite of the data constraints. The amount of variability in surface water biota explained by each model reflects the scale, spatial location, and the composition of contributing landscape metrics. The landscape-biota model developed for the whole basin using PLS explains 43% and 80% of the variation in water biota and landscape data sets, respectively. Models developed for each of the three ecoregions indicate dominance of landscape variables which reflect the geophysical characteristics of that ecoregion.

show abstract

“…Among biological methods, algal growth potential (AGP) is the most direct method used for estimating the bioavailability of P in samples (Klapwijk et al 1989;Miller et al 1980;Okubo et al 2012;Raschke and Schultz 1987). The AGP test requires a 14-day incubation; thus, it is not suitable for quantifying BAP in a large number of samples (Schultz et al 1994). Previous studies have shown that P extracted with 0.1 M NaOH indicates P uptake by algae (Cuff et al 2021;Sharpley et al 1991).…”

Section: Introductionmentioning

confidence: 99%

Developing a Method to Measure Bioavailable Phosphorus in River Water via Simultaneous Multisample Ultrasonic Extraction

Ling,

Phong,

Yokota

et al. 2023

Preprint

View full text Add to dashboard Cite

To reduce watershed eutrophication, measurements of bioavailable phosphorus (BAP) rather than total phosphorus (TP) are deemed critical. However, standard methods for direct and routine BAP measurement in river water have not been widely investigated. Therefore, in this study, a simultaneous multisample ultrasonic extraction method is proposed to measure total BAP (TBAP) in river water. Spike-and-recovery assessments showed that at least three repeated extractions are required to maintain accuracy. Results showed that sample P concentrations obtained using a 2-min extraction time and three extractions were consistent with theoretical values. Furthermore, the TBAP extraction results from custom samples containing different P sediment concentrations obtained under these conditions showed no significant differences between experimental and theoretical concentrations. Additionally, river water TBAP was quantified using the conventional and proposed method to examine the practicality of using the proposed method for simultaneous multisample ultrasonic extraction and to evaluate its adaptability to actual river water analysis. The extracted concentrations matched those obtained using the conventional method, in which total BAP is calculated as the sum of dissolved BAP and particulate BAP; no significant difference was observed between the concentrations. Ultrasonic extraction was considerably less time-consuming than the conventional method because more samples could be analyzed during a single run. Therefore, the simultaneous multisample ultrasonic extraction method proposed in this study can be used to directly quantify total BAP in river water.

show abstract

A shortened algal growth potential test

Cited by 5 publications

References 3 publications

Impacts of Nonpoint-Source Pollution on the Structure of Diatom Assemblages, Whole-Stream Oxygen Metabolism, and Growth of Selenastrum capricornutum in the Red River Watershed of North-Central Tennessee

Impacts of Nonpoint-Source Pollution on the Structure of Diatom Assemblages, Whole-Stream Oxygen Metabolism, and Growth of Selenastrum capricornutum in the Red River Watershed of North-Central Tennessee

Partial Least Square Analyses of Landscape and Surface Water Biota Associations in the Savannah River Basin

Developing a Method to Measure Bioavailable Phosphorus in River Water via Simultaneous Multisample Ultrasonic Extraction

Contact Info

Product

Resources

About