Selenium Accumulation in European Starlings Nesting in a Selenium-Contaminated Environment

Santolo, Gary M.

doi:10.1650/0010-5422(2007)109[862:saiesn]2.0.co;2

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…Plant [ (Santolo 2007) were used to describe the relation between passerine diet and blood Se concentrations (r 2 = 0.47, n = 9, P = 0.042). In addition, we assumed that Se uptake from plant and invertebrate diets was less than complete and used an initial correction factor of 0.70.…”

Section: Resultsmentioning

confidence: 99%

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Use of Site-Specific Data for Modeling Selenium Bioaccumulation by Terrestrial Animals

Santolo¹,

Yamamoto

Ohlendorf

2021

Preprint

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We developed a bioaccumulation model from an extensive set of monitoring data to predict selenium (Se) concentrations in biota within a terrestrial system (Kesterson Reservoir, CA). The model uses water-extractable Se concentrations in soil to estimate the expected range of mean Se concentrations in biota at Kesterson for future scenarios. Biological monitoring data collected at Kesterson Reservoir from 1988 to 1994 were used to parameterize the initial model. The model was tested and updated with additional sample results from 1995 through 2001 biological monitoring and validated and calibrated using Se concentrations from sampling conducted in 2004 and 2006. Minor adjustments were made to the model based on each additional year’s results and the model was used in 2014 to assess whether there were continuing threats to wildlife at Kesterson. The model predicts Se concentrations in small mammals, bird blood, and bird eggs in common species found at Kesterson. This model was used for the final assessment of Kesterson in 2014 and performed well, but there was variability in results due to differences in individual diets and feeding ranges of animals. In the comparisons of 2014 predicted to measured Se, only whole-body mice, deer mice (Peromyscus maniculatus), and kestrel blood were significantly different. The trophic transfer factors and regression equations should be applicable to other Se-contaminated sites; adjusting weighting factors based on diet and range allows the model to be adapted and used at other sites.

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Section: Resultsmentioning

confidence: 99%

“…Paired samples of Se in starling blood and egg Se (Santolo 2007) were used to describe the relation between passerine blood and egg Se concentrations (r 2 = 0.74, n = 5, P = 0.002). Passerine egg Se concentrations were estimated using the following regression equation:…”

Section: Resultsmentioning

confidence: 99%

Use of Site-Specific Data for Modeling Selenium Bioaccumulation by Terrestrial Animals

Santolo¹,

Yamamoto

Ohlendorf

2021

Preprint

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“…The variability in the slopes and significance of these relationships may be a result of species differences in dietary Se exposure. At Kesterson, nest boxes provided nest sites for starlings [21], however, appropriate foraging habitat is limited for starlings within Kesterson. European starlings nesting at Kesterson forage to various degrees offsite in low-Se areas and this may account for the lower slope observed (Fig.…”

Section: Discussionmentioning

confidence: 99%

Selenium accumulation in coturnix quail fed seleno‐L‐methionine

Santolo

Yamamoto

Neiberg

et al. 2010

Enviro Toxic and Chemistry

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The accumulation of selenium in Coturnix quail, a sensitive species to selenium toxicity, was studied. Quail were fed diets containing 0.7 µg/g (control), 12 µg/g (low-Se), and 22 µg/g (high-Se) as seleno-L-methionine for four weeks. At the end of the four weeks, blood selenium in the treatment groups had a positive significant relationship to diet, and selenium in blood was approximately two times, and in livers was approximately three times, the dietary concentration. Quail in the low-Se group accumulated selenium to higher levels over the same time period than American kestrels and mallards fed selenomethionine at similar concentrations in other studies. Food consumption was similar among the groups throughout the study. Body mass, as a percent of initial body mass, was similar in the control and low-Se groups (102%) but lower in the high-Se group (97%). Liver mass, as a percent of initial body mass, showed a positive dose-dependent response to dietary selenium, and liver mass was significantly higher in quail fed 22 µg Se/g than in control quail. Unlike other species studied, accumulation of selenium in blood did not plateau but continued to increase until the study ended.

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“…Then monitoring was reduced to bird population surveys (2006 only); sampling of plants (2012-2013 only); sampling of soil and detritus and bird nesting and reproduction study plus blood and egg sampling in 2006 and 2012-2013; and ephemeral pool monitoring when present. Results of the monitoring as well as studies of European starlings (Sturnus vulgaris) using on-site nest boxes (Santolo 2007), American kestrels using on-site nest boxes (Santolo and Yamamoto 2009), and comparisons of small mammals to off-site reference locations (Santolo 2009) are provided in the final biological monitoring report for Kesterson Reservoir for 2013-2014 (USBR 2015) (see Supplemental Data).…”

Section: To 2014mentioning

confidence: 99%

Kesterson Reservoir: 30 Years of Selenium Risk Assessment and Management

Ohlendorf

Santolo

Byron

et al. 2019

Integr Envir Assess & Manag

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Severe effects of selenium (Se) occurred among birds feeding and nesting at Kesterson Reservoir (San Joaquin Valley, California, USA) in 1983 to 1985. This paper describes the integration of site monitoring, risk assessment, and management actions conducted after the effects of Se were discovered. Selenium contamination of the site occurred over just a few years, but actions to resolve the contamination issues required >20 y. The reservoir, a series of 12 ponds totaling about 1280 acres (518 hectares), served for storage and evaporation of subsurface agricultural drainage. Selenium concentrations in reservoir inflow in 1983 were about 300 µg/L, primarily as selenate; within the ponds it was biogeochemically reduced to other inorganic and organic forms and bioaccumulated by biota or deposited to sediments. An estimated 9000 kg of Se were delivered to Kesterson in 1981–1986. A 1985 order required cleanup and abatement of the reservoir, so the United States Bureau of Reclamation and the US Department of the Interior undertook actions and studies to reduce hazards to birds. In 1988, about 1 million cubic yards (764 500 m3) of soil were used to fill portions of the reservoir, transforming it into terrestrial habitat. Intensive monitoring began in 1989 to assess the impact of the reservoir on wildlife, provide a basis for adjusting site management, verify the effectiveness of cleanup actions, and provide a basis for modifying future monitoring. Monitoring continued until 2014, with modifications and management actions based on results of 2 risk assessments (1993 and 2000). Monitoring results in 2013–2014 showed that Se concentrations were relatively stable over time and risks to wildlife were low. From the initial problem discovery to the conclusion of actions taken to remediate the site, combining responsive, reactive, and adaptive monitoring; modeling; risk assessment; and mitigation actions proved effective in solving the problem so that risks to wildlife were reduced to minimal levels. Integr Environ Assess Manag 2020;16:257–268. © 2019 SETAC

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Selenium Accumulation in European Starlings Nesting in a Selenium-Contaminated Environment

Cited by 7 publications

References 2 publications

Use of Site-Specific Data for Modeling Selenium Bioaccumulation by Terrestrial Animals

Use of Site-Specific Data for Modeling Selenium Bioaccumulation by Terrestrial Animals

Selenium accumulation in coturnix quail fed seleno‐L‐methionine

Kesterson Reservoir: 30 Years of Selenium Risk Assessment and Management

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