Role of respiration in the accumulation of organic xenobiotics by the amphipod <i>Diporeia</i> sp.

Landrum, Peter F.; Stubblefield, Christina R.

doi:10.1002/etc.5620100806

Cited by 35 publications

(3 citation statements)

References 30 publications

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“…While the primary means of exposure to LMW PAHs for aquatic organisms is aqueous due to their solubility, there is also growing evidence that maternal transfer of contaminants to their offspring can be a source of exposure (Martins et al, 2021). Aqueous exposure can occur both through ventilation in the gills (Birdsall et al, 2001), and via diffusion through their skin (Landrum and Stubblefild, 1991), but there is also research that points to sediment as potentially the more important exposure route. In their research on PAH accumulation in wood frog tadpoles, Bilodeau et al, (2019) found that tadpoles in contact with both sediment and water contaminated with PAHs accumulated higher concentrations than those in just the aqueous environment, even though the aqueous-only PAH concentrations were significantly higher than the sediment and aqueous mixture.…”

Section: Exposure Routes and Effects Of Pahs On Aquatic Organismsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons in terrestrial and aquatic environments following wildfire: a review

et al. 2023

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Wildfires are a natural landscape disturbance in many climates and forest types, but the cumulative impact of human-caused climate change, historical fire management and suppression, and changing species diversity in forests has led to an increase in the size and/or severity of wildfires in certain regions across the globe. There are a significant number of research studies on the effects of wildfire on human health, forest ecology, hydrology, and the physical, chemical, and biological properties of soils. However, research on the impact of wildfire on watersheds including toxicity in aquatic organisms, water chemistry, and fluvial sediment quality is less extensive, focusing primarily on water quality indicators such as nutrients and sediment flux. Recent research has shown that wildfires contribute to the environment significant amounts of polycyclic aromatic hydrocarbons (PAHs), which are compounds produced during the incomplete combustion of organic material, and are known to be toxic and mutagenic compounds. The primary objective of this paper is to review the recent literature that pertains to the contamination of surface waters and sediments, and source apportionment of wildfire-derived PAHs to determine where research gaps remain. Additional objectives are to assess the use of molecular ratios to apportion PAH sources, and finally, to create a roadmap for future studies in designing and conducting research that seeks to determine sources of wildfire-derived PAHs in water and sediment.

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Section: Exposure Routes and Effects Of Pahs On Aquatic Organismsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons in terrestrial and aquatic environments following wildfire: a review

et al. 2023

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“…Aquatic organisms are exposed to PAHs in two primary ways, the first being aqueous exposure through ventilation in the gills (Birdsall et al 2001) and diffusion through skin (Landrum and Stubblefild 1991). The second, and potentially more important, is through burrowing in or ingesting sediments, which primarily applies to HMW PAHs due to their hydrophobicity and affinity to adsorb to sediment and organic matter (Leppänen and Kukkonen 2000;Wong et al 2004;De La Torre-Roche et al 2009;Hayakawa et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Post-wildfire contamination of soils and sediments by polycyclic aromatic hydrocarbons in north-central British Columbia, Canada

Kieta

Owens

Petticrew

2023

Int. J. Wildland Fire

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Background The Nechako River Basin (NRB) is a large, regulated basin in north-central British Columbia, Canada that has been impacted by numerous landscape disturbances, including a severe wildfire in 2018. Aims The aims of this study were to quantify the post-wildfire temporal and spatial extent of contamination by polycyclic aromatic hydrocarbons (PAHs) of both soils and riverine sediments, and to identify the primary sources of PAHs in the watershed. Methods Soil samples were collected at burned and unburned sites in 2018 and at the burned sites in 2020 and 2021. Sediment samples were collected at three tributaries impacted by wildfire and three Nechako River mainstem (i.e. main channel) sites from 2018 to 2021. Samples were analysed for parent PAHs. Key results PAH concentrations decreased in soil samples from 2018 to 2021 but are not below the concentrations found in unburned samples. Tributary sediment samples showed higher concentrations immediately post-fire relative to the mainstem Nechako River, but in the years since, that trend has reversed. Conclusions PAHs persist in terrestrial and aquatic environments for years following wildfire, but at concentrations below various quality guidelines. PAHs were primarily derived from the wildfires, with some mixed sources at the downstream sites. Implications Wildfires are an important source of environmental contamination of terrestrial and aquatic environments.

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“…For instance, the contaminant uptake rate was correlated with the respiration rate and the surface area to volume ratio for Diporeia sp. for uptake of polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) from water . Developing the relationships between the physiology of aquatic organisms and organism energetics has resulted in the development of an improved approach for interpreting the bioaccumulation of organic contaminants .…”

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confidence: 99%

Dynamics of contaminant accumulation in benthos: Route to understanding exposure to organic contaminants

Landrum¹,

Lydy

Eadie³

2013

Enviro Toxic and Chemistry

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In the early to middle 1980s, there was an effort to improve interpretation of the factors controlling exposure to aquatic species, including benthos. These approaches used either thermodynamics or toxicokinetics to describe the exposure. In the "Top 100" list for Environmental Toxicology and Chemistry [1], there are good examples of both approaches. The information provided by the 2 methods varied depending on the question being asked. The thermodynamic approach focused on the maximum exposure that could be obtained given the chemical activity of the compound when the organism was in equilibrium with the exposure environment. Conversely, the kinetic approach focused on the dynamics and the impact of environmental conditions affecting exposure. In the present paper, we examine the development of toxicokinetics as a means to enhance information on exposure, including issues of bioavailability and toxicity of organic contaminants to aquatic organisms.The kinetic approach for studying exposure was useful for examining process-associated information, which included issues dictating bioavailability, rates of exposure, and internal processes such as biotransformation, leading to a better understanding of the specific factors controlling the rate and extent of accumulation. The use of kinetic approaches also becomes important when there is a desire to interpret dynamic exposures, such as pulsed or episodic exposures to organisms. To this end, there were many studies that examined the toxicokinetics of contaminants in aquatic organisms, and various models were used to describe the results of environmental conditions on the exposure process. Thus, it became important to establish the connection between the models that were being employed, and the underlying terminology and assumptions to allow those interested in the impact of environmental variables on exposure to understand what each of the models was describing [2]. The models in use were generally simple firstorder models, which used kinetic constants and distinguished the differences in the coefficients under different assumptions or experimental conditions. For instance, one of the important distinctions between the models was the connection between concentration-and mass balance-based models. The uptake rate coefficient from the mass balance model was system-dependent and had to be translated to a system-independent form by adjusting for the exposure volume and mass to be compared across studies with different mass to volume ratios. Another important distinction was the connection between traditional rate coefficient models and those based on fugacity terminology. The terminology of the models both described the same processes, but the fugacity model was dependent on the transfer coefficient (D) and fugacity to yield the uptake. Connecting the two types of models for toxicokinetics allowed for additional comparisons among studies. Finally, models describing the connection between physiological processes and toxicokinetics, called physiologically based pharmacokine...

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Role of respiration in the accumulation of organic xenobiotics by the amphipod Diporeia sp.

Cited by 35 publications

References 30 publications

Polycyclic aromatic hydrocarbons in terrestrial and aquatic environments following wildfire: a review

Polycyclic aromatic hydrocarbons in terrestrial and aquatic environments following wildfire: a review

Post-wildfire contamination of soils and sediments by polycyclic aromatic hydrocarbons in north-central British Columbia, Canada

Dynamics of contaminant accumulation in benthos: Route to understanding exposure to organic contaminants

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