Learned discourses

Finley, Keith; Garrett, Reid

doi:10.1002/ieam.5630030216

Cited by 8 publications

(1 citation statement)

References 1 publication

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“…Time to recovery could not be estimated from many otherwise relevant case reports. Examples included reports from which (1) biological conditions appeared to be substantially constrained by ongoing pollution and thus no judgement of recovery times could be made (Arnekleiv & Størset, 1995; Chadwick et al, 1986; Hoiland et al, 1994; Kowalik et al, 2007; Lefcort et al, 2010; Smith, 2003); (2) data were not presented as a time series (Rabeni et al, 1985); (3) reference and assessment sites were too dissimilar to assess effects or recovery (Buys et al, 2015); or (4) recovery only addressed chemical endpoints (Finley & Garrett, 2007; Hornberger, et al 2009; Lemly, 1997).…”

Section: Approachmentioning

confidence: 99%

The Capacity of Freshwater Ecosystems to Recover from Exceedences of Aquatic Life Criteria

Mebane

2022

Enviro Toxic and Chemistry

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In the United States, national chemical water quality criteria for the protection of aquatic life assume that aquatic ecosystems have sufficient resiliency to recover from criteria exceedences occurring up to once every 3 years. This resiliency assumption was critically reviewed through two approaches: (1) synthesis of case studies, and (2) population modeling. The population modeling examined differences in recovery of species with widely different life histories. One invertebrate (Hyalella azteca) and four fish species were modeled (fathead minnow, brook trout, lake trout, and shortnose sturgeon) with various disturbance magnitudes and intervals. The synthesis of ecosystem case studies showed generally faster recoveries for insect communities rather than fish, and recoveries from pulse (acute) disturbances were often faster than recoveries from press (chronic) disturbances. When the recovery dataset excluded severe disturbances that seemed unrepresentative of common facility discharge upsets that might cause criteria exceedences, the median recovery time was 1 year, 81% of the cases were considered recovered within 3 years, and 95% were considered recovered within 10 years. The modeling projected that short-lived fish species with high recovery times could thrive despite enduring 50% mortality disturbances every other year. However, long-lived fish species had longer recovery times and declined under the one disturbance every 3 years scenario. Overall, the analyses did not refute the long-standing judgements that 3 years is generally sufficient for recovery from nonrepetitive, moderate intensity disturbances of a magnitude up to 2× the chronic criteria in waters without other pollution sources or stresses. However, these constraints may not always be met and if long-lived fish species are a concern, longer return intervals such as 5-10 years could be indicated.

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Section: Approachmentioning

confidence: 99%

The Capacity of Freshwater Ecosystems to Recover from Exceedences of Aquatic Life Criteria

Mebane

2022

Enviro Toxic and Chemistry

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Monitored Natural Recovery

Fuchsman

Bell

Merritt

et al. 2013

SERDP/ESTCP Environmental Remediation Technology

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Parental dietary seleno-L-methionine exposure and resultant offspring developmental toxicity

et al. 2016

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Selenium (Se) leaches into water from agricultural soils and from storage sites for coal fly ash. Se toxicity causes population and community level effects in fishes and birds. We used the laboratory aquarium model fish, Japanese medaka (Oryzias latipes), an asynchronous breeder, to determine aspects of uptake in adults and resultant developmental toxicity in their offspring. The superior imaging properties of the model enabled detailed descriptions of phenotypic alterations not commonly reported in the existing Se literature. Adult males and females in treatment groups were exposed, separately and together, to a dry diet spiked with 0, 12.5, 25, or 50 µg/g (dry weight) seleno-L-methionine (SeMet) for 6 days, and their embryo progeny collected for 5 days, maintained under controlled conditions and observed daily for hatchability, mortality and/or developmental toxicity. Sites of alteration included: craniofacial, pericardium and abdomen (Pc/Ab), notochord, gall bladder, spleen, blood, and swim bladder. Next, adult tissue Se concentrations (liver, skeletal muscle, ovary and testis) were determined and compared in treatment groups of bred and unbred individuals. No significant difference was found across treatment groups at the various SeMet concentrations; and, subsequent analysis compared exposed vs. control in each of the treatment groups at 10 dpf. Increased embryo mortality was observed in all treatment groups, compared to controls, and embryos had a decreased hatching rate when both parents were exposed. Exposure resulted in significantly more total altered phenotypes than controls. When altered phenotypes following exposure of both parents were higher than maternal only exposure, a male role was suggested. The comparisons between treatment groups revealed that particular types of phenotypic change may be driven by the sex of the exposed parent. Additionally, breeding reduced Se concentrations in some adult tissues, specifically the liver of exposed females and skeletal muscle of exposed males. Detailed phenotypic analysis of progeny from SeMet exposed parents should inform investigations of later life stages in an effort to determine consequences of early life exposure.

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Learned discourses

Cited by 8 publications

References 1 publication

The Capacity of Freshwater Ecosystems to Recover from Exceedences of Aquatic Life Criteria

The Capacity of Freshwater Ecosystems to Recover from Exceedences of Aquatic Life Criteria

Monitored Natural Recovery

Parental dietary seleno-L-methionine exposure and resultant offspring developmental toxicity

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