From organisms to populations: Modeling aquatic toxicity data across two levels of biological organization

Raimondo, Sandy; McKenney, Charles L.

doi:10.1897/05-335r.1

Cited by 20 publications

(15 citation statements)

References 40 publications

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“…This strongly differed from decomposition analysis results. Similar differences were reported by other authors (Salice and Miller 2003; Raimondo and McKenney 2006). However, these two methods addressed different questions about the sensitivity of organisms to toxicants.…”

Section: Discussionsupporting

confidence: 92%

“…Salice and Miller (2003) stated that “decomposition analysis indicated that the vital rates that were altered when populations were exposed to Cd were not well predicted by elasticities”. Raimondo and McKenney (2006) concluded that “although elasticity analysis identifies the life stages that may be key targets for conservation efforts… the magnitude of change in population parameters is an equally important factor to consider during population-level risk assessment of toxicant exposure”. Hansen et al .…”

Section: Discussionmentioning

confidence: 99%

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Decomposition analysis of LTREs may facilitate the design of short-term ecotoxicological tests

2012

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This study compared two methods, based on re-analyzed data from a partly published life table response experiment (LTRE), to help determine the optimal approach for designing ecotoxicological assessments. The 36-day LTRE data recorded the toxic effects of cadmium (Cd) and imidacloprid, alone and in combination, on the reproduction and survivorship of aphids (Acyrthosiphon pisum Harris). We used this data to construct an age-classified matrix model (six age classes, each 6 days long) to estimate aphid population growth rate (λ) under each treatment. For each treatment, an elasticity analysis and a demographic decomposition analysis were performed, and results were compared. Despite different results expected from the two toxicants, the elasticity values were very similar. The elasticity of λ with respect to survival was highest in the first age class, and that with respect to fertility was highest in the second age class. The demographic decomposition analysis examined how changes in life-history traits contributed to differences in λ between control and treated populations (Δλ). This indicated that the most important contributors to Δλ were the differences in survival (resulting from both demographic sensitivity and toxicity) in the first and the second age classes of aphids and differences in fertility in the third and the fourth age classes. Additionally, the toxicants acted differently. Cd reduced Δλ by impairing fertility at third age class and reducing survivorship from the second to the third age class. Imidacloprid mostly reduced survivorship at the first and second age classes. The elasticity and decomposition analyses showed different results, because these methods addressed different questions about the interaction of organism life history and sensitivity to toxicants. This study indicated that the LTRE may be useful for designing individual-level ecotoxicological experiments that account for both the effects of the toxicant and the demographic sensitivity of the organism.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Decomposition analysis of LTREs may facilitate the design of short-term ecotoxicological tests

2012

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“…Kuhn et al (2000) found high correlations of 96h-LC50 values and toxicant concentrations where populations would begin to decline. These results have also been observed in later mysid population studies by Raimondo and McKenney (2006). Kuhn et al (2001) confirmed that mysid models generated from laboratoryderived survival and reproduction could predict population projections of mysids in laboratory conditions.…”

Section: Population Dynamicssupporting

confidence: 77%

“…In this analysis, reduced reproduction was the primary contributor to reduced population growth rate for most concentrations, emphasizing the importance of altered reproduction in mysid population-level risk assessment (Raimondo and McKenney, 2006). Previous population modeling efforts by Kuhn et al (2000Kuhn et al ( , 2001 were aimed at evaluating the ecological relevance of mysid bioassays and population models.…”

Section: Population Dynamicsmentioning

confidence: 97%

Mysid crustaceans as standard models for the screening and testing of endocrine-disrupting chemicals

et al. 2007

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Investigative efforts into the potential endocrine-disrupting effects of chemicals have mainly concentrated on vertebrates, with significantly less attention paid to understanding potential endocrine disruption in the invertebrates. Given that invertebrates account for at least 95% of all known animal species and are critical to ecosystem structure and function, it remains essential to close this gap in knowledge and research. The lack of progress regarding endocrine disruption in invertebrates is still largely due to: (1) our ignorance of mode-of-action, physiological control, and hormone structure and function in invertebrates; (2) lack of a standardized invertebrate assay; (3) the irrelevance to most invertebrates of the proposed activity-based biological indicators for endocrine disruptor exposure (androgen, estrogen and thyroid); (4) limited field studies. Past and ongoing research efforts using the standard invertebrate toxicity test model, the mysid shrimp, have aimed at addressing some of these issues. The present review serves as an update to a previous publication on the use of mysid shrimp for the evaluation of endocrine disruptors (Verslycke et al., 2004a). It summarizes recent investigative efforts that have significantly advanced our understanding of invertebrate-specific endocrine toxicity, population modeling, field studies, and transgeneration standard test development using the mysid model.

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“…In other words, a compound cannot be assumed to cause the same degree of effect on the population growth rate as it does on survival or reproduction. This phenomenon is true for a variety of exposure scenarios with A. bahia (Raimondo and McKenney 2006;Grear 2016). Similarly, reproduction by adult nematodes is more sensitive to cadmium than juvenile period (duration as juvenile); however, change in juvenile period has a greater effect on population fitness than does adult reproduction (Kammenga et al 1996).…”

Section: Discussionmentioning

confidence: 81%

Coupling toxicokinetic–toxicodynamic and population models for assessing aquatic ecological risks to time‐varying pesticide exposures

Thursby

Sappington

Etterson

2018

Enviro Toxic and Chemistry

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Population modeling evaluations of pesticide exposure time series were compared with aspects of a currently used risk assessment process. The US Environmental Protection Agency's Office of Pesticide Programs models daily aquatic 30-yr pesticide exposure distributions in its risk assessments, but does not routinely make full use of the information in such time series. We used mysid shrimp Americamysis bahia toxicity and demographic data to demonstrate the value of a toxicokinetic-toxicodynamic model coupled with a series of matrix population models in risk assessment refinements. This species is a small epibenthic marine crustacean routinely used in regulatory toxicity tests. We demonstrate how the model coupling can refine current risk assessments using only existing standard regulatory toxicity test results. Several exposure scenarios (each with the same initial risk characterization as determined by a more traditional organism-based approach) were created within which population modeling documented risks different from those of assessments based on the traditional approach. We also present different acute and chronic toxicity data scenarios by which toxicokinetic-toxicodynamic coupled with population modeling can distinguish responses that traditional risk evaluations are not designed to detect. Our results reinforce the benefits of this type of modeling in risk evaluations, especially related to time-varying exposure concentrations. Environ Toxicol Chem 2018;37:2633-2644. Published 2018 Wiley Periodicals Inc. on behalf of SETAC. This article is a US government work and, as such, is in the public domain in the United States of America.

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From organisms to populations: Modeling aquatic toxicity data across two levels of biological organization

Cited by 20 publications

References 40 publications

Decomposition analysis of LTREs may facilitate the design of short-term ecotoxicological tests

Decomposition analysis of LTREs may facilitate the design of short-term ecotoxicological tests

Mysid crustaceans as standard models for the screening and testing of endocrine-disrupting chemicals

Coupling toxicokinetic–toxicodynamic and population models for assessing aquatic ecological risks to time‐varying pesticide exposures

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