New insight into biomagnification factor of mercury based on food web structure using stable isotopes of amino acids

Kim, Dokyun; Won, Eun-Ji; Cho, Ha-Eun; Lee, Jonghyun; Shin, Kyung-Hoon

doi:10.1016/j.watres.2023.120591

Cited by 4 publications

(1 citation statement)

References 79 publications

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“…The average annual rainfall values in 2017 and 2018 were 104.7cm and 164.1cm, respectively [22]. Since 2018 had more depleted δ 13 C, especially in the northern bays, it is possible that the higher rainfall increased freshwater inputs into the MCBs and affected the carbon signatures of organisms at the base of the food web [33,46] which, in turn, resulted in variations in the fish species' δ 13 C [32,33,[47][48][49][50].…”

Section: Temporal Variations In Stable Isotope Composition Of the Fou...mentioning

confidence: 99%

Spatial, Temporal, and Interspecific Differences in Composition of Stable Isotopes in Fishes in Maryland Coastal Bays

Richardson,

Chigbu,

Ishaque

2024

Diversity

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Carbon (δ13C) and nitrogen (δ15N) isotopes were used to evaluate spatial, temporal, and interspecific differences in trophic relationships of four fish species (Paralichthys dentatus, Anchoa mitchilli, Leiostomus xanthurus, and Bairdiella chrysoura) in Maryland’s coastal bays. The δ13C values for all species were more enriched in 2017 than in 2018, a year of higher-than-average rainfall that likely caused higher amounts of terrestrial carbon to enter the estuary. There were significant differences among species in the δ13C values, with L. xanthurus being the least depleted (−17.2‰ in 2017; −18.8‰ in 2018). Spatially, the δ13C values of the species, particularly P. dentatus and B. chrysoura, were more depleted in the northern bays, which have a higher nutrient content and receive more freshwater inflow directly from tributaries, than the southern bays. The observed δ13C values (−19.5 ± 0.2‰ to –17.2 ± 0.3‰), however, indicate that marine phytoplankton was the primary carbon source of the fishes. Overall, A. mitchilli was the most enriched in δ15N (13.0‰), and L. xanthurus was the most depleted (10.2‰). δ15N was more enriched in fish from the more human-impacted northern bays than in fish from the southern bays, though this might also have stemmed from the differences in the diet composition of the species in the northern and southern bays. A. mitchilli had the highest trophic level, while L. xanthurus and P. dentatus had the lowest trophic levels. Niche breadth was widest in L. xanthurus compared to the other fish species, suggesting a higher variability in diets among L. xanthurus individuals, leading to specialized diets. There was a high niche overlap between B. chrysoura, A. mitchilli, and L. xanthurus, which indicates they fed on similar prey resources.

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Section: Temporal Variations In Stable Isotope Composition Of the Fou...mentioning

confidence: 99%

Spatial, Temporal, and Interspecific Differences in Composition of Stable Isotopes in Fishes in Maryland Coastal Bays

Richardson,

Chigbu,

Ishaque

2024

Diversity

View full text Add to dashboard Cite

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Compound-specific stable nitrogen isotope analysis of amino acids shows that bulk methods provide higher estimates of mercury biomagnification in the Gulf of St. Lawrence

Lacombe,

Barst,

Pelletier

et al. 2024

Environmental Pollution

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Compound-specific nitrogen isotope of amino acids: Toward an improved understanding of mercury trophic transfer in different habitats

Wang,

Wu,

et al. 2024

Journal of Hazardous Materials

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New insight into biomagnification factor of mercury based on food web structure using stable isotopes of amino acids

Cited by 4 publications

References 79 publications

Spatial, Temporal, and Interspecific Differences in Composition of Stable Isotopes in Fishes in Maryland Coastal Bays

Spatial, Temporal, and Interspecific Differences in Composition of Stable Isotopes in Fishes in Maryland Coastal Bays

Compound-specific stable nitrogen isotope analysis of amino acids shows that bulk methods provide higher estimates of mercury biomagnification in the Gulf of St. Lawrence

Compound-specific nitrogen isotope of amino acids: Toward an improved understanding of mercury trophic transfer in different habitats

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