Stable isotope ratios reveal food source of benthic fish and crustaceans along a gradient of trophic status in the East China Sea

Chang, Ni-Na; Shiao, Jen‐Chieh; Gong, Gwo‐Ching; Kao, Shuh‐Ji; Hsieh, Chih‐hao

doi:10.1016/j.csr.2014.04.021

Cited by 21 publications

(8 citation statements)

References 74 publications

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“…The isotopic compositions of seawater POM obtained in this study resembled those for marine planktonic phototrophs (δ 13 C values between −24.0 and −19.0‰ and δ 15 N values between +4.0 and +8.0‰ [ 46 ]). These isotopic values were also comparable with those for POM collected from adjacent areas (e.g., δ 13 C values between −23.0 and −19.9‰ and δ 15 N values between +3.7 and +4.3‰ for POM from the outer shelf of the East China Sea [ 49 ] and δ 13 C values between −24.8 and −21.1‰ and δ 15 N values between +3.0 and +4.5‰ for POM in sediment trap and sediments from the Okinawa Trough [ 50 , 51 ]). The chemosynthetically-derived production characterized by the 13 C-enriched and 15 N-depleted isotopic signature was barely observed in the seawater POM, suggesting restricted influence of the vent fluid on the surrounding water mass.…”

Section: Discussionsupporting

confidence: 75%

Trophic structure and energy flow in a shallow-water hydrothermal vent: Insights from a stable isotope approach

Chang

Lin

et al. 2018

PLoS ONE

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Shallow-water hydrothermal vent ecosystems are distinct from the deep-sea counterparts, because they are in receipt of sustenance from both chemosynthetic and photosynthetic production and have a lack of symbiosis. The trophic linkage and energy flow in these ecosystems, however remain elusive, which allows us poor understanding of the whole spectrum of biological components distributed across such environmental gradients. In this study, a thorough isotopic survey was conducted on various biological specimens and suspended particulates collected along four transects across the venting features of a shallow-water hydrothermal field off Kueishan Island, Taiwan. The isotope data combined with a Bayesian-based mixing model indicate that the vent-associated particulate organic matter (vent POM), as primary contribution of chemoautotrophic populations, has a high δ13C value (−18.2 ± 1.1‰) and a low δ15N value (−1.7 ± 0.4‰). Zooplankton and epibenthic crustaceans, as the fundamental consumers, exhibit δ13C and δ15N values ranging from −21.3 to −19.8‰ and +5.1 to +7.5‰, respectively, and can utilize the vent POM for 38–53% of their diets. The vent-obligate crab Xenograpsus testudinatus shows a large variation in δ13C (from −18.8 to −13.9‰) and δ15N values (from 1.1 to 9.8‰), although an omnivorous trophic level (2.5) is identified for it using δ15N values of amino acids, and it can utilize the vent POM for 6–87% of its diet. The consistently low (< 10.0‰) and overlapping δ15N values for most of the analyzed macroinvertebrates suggest extensive ingestion of chemosynthetic production complementing the photosynthetic production, a weak prey–predator relationship and low trophic complexity possibly imposed by the extreme environmental contexts of shallow-water hydrothermal ecosystems.

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Section: Discussionsupporting

confidence: 75%

Trophic structure and energy flow in a shallow-water hydrothermal vent: Insights from a stable isotope approach

Chang

Lin

et al. 2018

PLoS ONE

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“…Such distinct characteristic of low C/N ratio in DCM layers indicate a proteinenriched chemical composition in POM. As the Redfield ratio is achieved when OM contains about 45 % protein (C/N = 3.8) and 10 % nucleic acids (C/N = 2.6) (Geider and La Roche, 2002), the relatively low C/N ratio in DCM layers is consistent with the C/N ratio of phytoplankton (<50 μm) (4.5-5.9) in surface water and zooplankton 5 (200-363 μm) (5.3-6.4) from 10 m above the bottom to surface water of the northern ECS in July 2010 (Chang et al, 2014). In addition, Kuroshio Water and TWCW induced Trichodesmium (Chen et al, 1996b;Jiang et al, 2017) may be partly responsible for the low C/N ratio in POM at DCM layers.…”

Section: Molar C/n Ratiomentioning

confidence: 54%

Biogeochemical characteristics of suspended particulates at deep chlorophyll maximum layers in the East China Sea

Liu

Kandasamy

Lin

et al. 2017

Preprint

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“…Significantly higher values of δ 13 C were observed in pelagic organisms compared with benthic organisms ( p = 0.008). These differences could be explained by the fact that pelagic grazing rates were significantly higher than benthic grazing rates in the eutrophic Lake Dianchi, and the high grazing rates and low photosynthetic fractionation resulted in an enrichment of δ 13 C in pelagic organisms. , …”

Section: Resultsmentioning

confidence: 99%

Trophodynamics of Organic Pollutants in Pelagic and Benthic Food Webs of Lake Dianchi: Importance of Ingested Sediment As Uptake Route

Fan

Wang

Liu

et al. 2017

Environ. Sci. Technol.

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Habitat is of great importance in determining the trophic transfer of pollutants in freshwater ecosystems; however, the major factors influencing chemical trophodynamics in pelagic and benthic food webs remain unclear. This study investigated the levels of p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE), polycyclic aromatic hydrocarbons (PAHs), and substituted PAHs (s-PAHs) in 2 plankton species, 6 invertebrate species, and 10 fish species collected from Lake Dianchi in southern China. Relatively high concentrations of PAHs and s-PAHs were detected with total concentrations of 11.4-1400 ng/g wet weight (ww) and 5.3-115 ng/g ww, respectively. Stable isotope analysis and stomach content analysis were applied to quantitatively determine the trophic level of individual organisms and discriminate between pelagic and benthic pathways, and the trophodynamics of the detected compounds in the two food webs were assessed. P,p'-DDE was found to exhibit relatively higher trophic magnification rate in the pelagic food web than in the benthic food web. In contrast, PAHs and s-PAHs exhibited greater dilution rates along the trophic levels in the pelagic food web. The lower species differences of pollutants accumulated in benthic organisms compared to pelagic organisms is attributable to extra uptake via ingested sediment in benthos. The average uptake proportions of PAHs and s-PAHs via ingested sediment in benthic biotas were estimated to be 31-77%, and that of p,p'-DDE was 46%. The uptake routes are of importance for assessing the trophic magnification potentials of organic pollutants, especially in eutrophic freshwater ecosystems.

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Stable isotope ratios reveal food source of benthic fish and crustaceans along a gradient of trophic status in the East China Sea

Cited by 21 publications

References 74 publications

Trophic structure and energy flow in a shallow-water hydrothermal vent: Insights from a stable isotope approach

Trophic structure and energy flow in a shallow-water hydrothermal vent: Insights from a stable isotope approach

Biogeochemical characteristics of suspended particulates at deep chlorophyll maximum layers in the East China Sea

Trophodynamics of Organic Pollutants in Pelagic and Benthic Food Webs of Lake Dianchi: Importance of Ingested Sediment As Uptake Route

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