Tracking Contaminant Transport From Biovectors

Kallenborn, Roland; Blais, Jules M.

doi:10.1007/978-94-017-9541-8_16

Cited by 5 publications

(5 citation statements)

References 252 publications

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“…A variety of paleolimnological proxy indicators has been developed to track biovector transport of nutrients and contaminants to lake sediments. ,,− Sedimentary δ 15 N is an important indicator of ornithogenic nitrogen , because 15 N is enriched in seabird guano. − However, δ 15 N could be affected by factors other than biovectors. For example, δ 15 N in lake sediment may be influenced by inorganic nitrogen input from weathering and postdepositional nitrification or denitrification. − Moreover, δ 15 N can also be enriched in sediments from other biovectors in addition to birds, e.g., whales, salmon, and other migratory fish .…”

Section: Introductionmentioning

confidence: 99%

“…13−16 A variety of paleolimnological proxy indicators has been developed to track biovector transport of nutrients and contaminants to lake sediments. 4,12,17−19 Sedimentary δ 15 N is an important indicator of ornithogenic nitrogen 19,20 because 15 N is enriched in seabird guano. 21−24 However, δ 15 N could be affected by factors other than biovectors.…”

Section: ■ Introductionmentioning

confidence: 99%

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Sterols and Stanols Preserved in Pond Sediments Track Seabird Biovectors in a High Arctic Environment

Cheng

Sun

Kimpe

et al. 2016

Environ. Sci. Technol.

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Seabirds are major vertebrates in the coastal ecosystems of the Canadian High Arctic, where they transport substantial amounts of marine-derived nutrients and pollutants from oceans to land by depositing guano and stomach oils to their nesting area, which often includes nearby freshwater ponds. Here we present novel indicators for evaluating the impact of seabirds on freshwater ecosystems. The ratio of cholesterol/(cholesterol + sitosterol) in pond sediments showed significant enrichment near a nesting colony of northern fulmars (Fulmarus glacialis) and was significantly correlated with ornithogenic enrichment of sediment as determined by sedimentary δ(15)N. The sterol ratio was also correlated with several bioaccumulative persistent organic pollutants (POPs), suggesting its usefulness in tracking biovector enrichment of contaminants. Human-derived epicoprostanol was also analyzed in the sediments, and its relationship with an abandoned, prehistoric camp was recorded, suggesting its potential as a tracer of prehistoric human activities in the Arctic. Sterols and stanols preserved in sediments appear to be useful geochemical tools that will inform our understanding of migratory species and the presence of prehistoric human populations in the Arctic, and possibly other animal populations.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Sterols and Stanols Preserved in Pond Sediments Track Seabird Biovectors in a High Arctic Environment

Cheng

Sun

Kimpe

et al. 2016

Environ. Sci. Technol.

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“…Contaminant biotransport is the dispersal of contaminants by organisms via movement within or among systems. The process of contaminant biotransport is characterized by several steps including: (1) contaminant bioaccumulation by a migratory organism; (2) contaminant transport across an ecosystem boundary; and (3) contaminant deposition into the recipient ecosystem (Blais et al, 2007;Kallenborn and Blais, 2015). This process can include a fourth step related to variables that control how biotransported contaminants are accumulated in the recipient food web (Gerig et al, 2018).…”

Section: Biological Transport Of Contaminantsmentioning

confidence: 99%

“…However, many different migratory fish have the potential to transport contaminants. Previous reviews suggest iteroparous fish, such as steelhead or suckers, represent a diminished risk for contaminant biotransport because they only deposit gametes (Blais et al, 2007;Kallenborn and Blais, 2015). However, eggs represent a POP-rich food resource that fish readily gorge upon when available (Gerig et al, 2019).…”

Section: Future Directions and Managementmentioning

confidence: 99%

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Contaminant Biotransport by Pacific Salmon in the Great Lakes

et al. 2020

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In the Laurentian Great Lakes, introduced Pacific salmon (Oncorhynchus spp.) deposit resources and contaminants as carcass and gametic tissue during spawning migrations to tributaries. Such ecosystem linkages can increase growth and contaminant bioaccumulation in stream-resident fish but mechanisms driving this process remain unclear. In this mini-review, we synthesize findings from observational, experimental, and modeling studies related to Pacific salmon contaminant biotransport in the Great Lakes. First, contaminant biotransport varies among Great Lakes basins suggesting that basin-level characteristics including salmon abundance and historic contamination are important factors controlling the movement of contaminants from the lakes to tributaries. Second, stream-resident fish exposed to salmon have 24-fold higher PCB but moderately lower Hg concentrations when compared to locations without salmon. This finding is explained by differential bioaccumulation of PCB and Hg into different tissue types; analysis of salmon tissue indicates that eggs have elevated PCB and lower Hg than carcasses. Third, stream-resident fish exhibit a dietary shift and increased ration reflecting salmon egg consumption. Last, models suggest that salmon egg consumption can drive a trade-off between PCB and Hg bioaccumulation. This review identifies mechanisms controlling the transfer of salmon-derived energy potential strategies for management. Future research should be directed at identifying other biovectors and determining a list of emerging contaminants that could be subject to biotransport.

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