Articles with "food chain" as a keyword



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Arsenic and Mercury Distribution in an Aquatic Food Chain: Importance of Femtoplankton and Picoplankton Filtration Fractions

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Published in 2022 at "Environmental Toxicology and Chemistry"

DOI: 10.1002/etc.5516

Abstract: Arsenic (As) and mercury (Hg) were examined in the Yellowstone Lake food chain, focusing on two lake locations separated by approximately 20 km and differing in lake floor hydrothermal vent activity. Sampling spanned from femtoplankton to… read more here.

Keywords: food chain; femtoplankton picoplankton; mercury;
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Stationary distribution and extinction for a food chain chemostat model with random perturbation

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Published in 2020 at "Mathematical Methods in the Applied Sciences"

DOI: 10.1002/mma.6809

Abstract: In this paper, we study the dynamical behavior of a stochastic food chain chemostat model, in which the white noise is proportional to the variables. Firstly, we prove the existence and uniqueness of the global… read more here.

Keywords: chemostat model; stationary distribution; food chain; chain chemostat ... See more keywords
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Monitoring reduced accumulation and risk evaluation of Cry1Ca during food chain transfer from genetic engineered plant to endoparasitoid.

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Published in 2023 at "Pest management science"

DOI: 10.1002/ps.7467

Abstract: BACKGROUND The potential risk of insecticidal proteins produced by genetically engineered (GE) plants to non-target organisms have long been an ecotoxicological concern. Apanteles chilonis, an important endoparasitoid of rice pest Chilo suppressalis, is potentially exposed… read more here.

Keywords: food chain; risk; chilonis; cry1ca ... See more keywords
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Effects of Selenium on Mercury Bioaccumulation in a Terrestrial food Chain from an Abandoned Mercury Mining Region

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Published in 2019 at "Bulletin of Environmental Contamination and Toxicology"

DOI: 10.1007/s00128-019-02542-z

Abstract: Few reports of the relationship exist between mercury (Hg) and selenium (Se) from locations of severe Hg contamination in terrestrial environments. Here, we report the concentrations of Hg and Se as well as Se:Hg molar… read more here.

Keywords: food chain; mining; mercury; region ... See more keywords
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Bioaccumulation of Polychlorinated Biphenyls (PCBs) in Fish Host-Parasite Bentho-Pelagic Food Chain in Epe Lagoon, Lagos, Nigeria

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Published in 2020 at "Bulletin of Environmental Contamination and Toxicology"

DOI: 10.1007/s00128-020-02893-y

Abstract: This paper investigates the concentrations of PCBs in the water and sediment media and its bio-concentration in the fish host-parasite bentho-pelagic food chain in Epe lagoon. Samples of water, sediment, plankton, mollusks, fish and intestinal… read more here.

Keywords: epe lagoon; water; pcbs; food chain ... See more keywords
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Trophic position, elemental ratios and nitrogen transfer in a planktonic host–parasite–consumer food chain including a fungal parasite

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Published in 2020 at "Oecologia"

DOI: 10.1007/s00442-020-04721-w

Abstract: Parasitism is arguably the most commonly occurring consumer strategy. However, only a few food web studies assess how well stable isotopes reflect the trophic position of parasitic consumers and results are variable. Even fewer studies… read more here.

Keywords: food chain; consumer; host; transfer ... See more keywords
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Riparian forest modifies fuelling sources for stream food webs but not food-chain length in lowland streams of Denmark

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Published in 2017 at "Hydrobiologia"

DOI: 10.1007/s10750-017-3313-1

Abstract: Several studies have shown that the origin of carbon fuelling food webs in streams depends on riparian cover type. In forested stream sites allochthonous resources fuel food webs, whereas autochthonous resources support biomass in grassland… read more here.

Keywords: grassland forested; food webs; chain length; food chain ... See more keywords
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Refugia and Allee Effect in Prey Species Stabilize Chaos in a Tri-Trophic Food Chain Model

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Published in 2019 at "Differential Equations and Dynamical Systems"

DOI: 10.1007/s12591-019-00457-z

Abstract: In this paper a mathematical model is proposed and analyzed to study the dynamics of tri-trophic food chain model with refugia and allee effect in prey species. Criteria for local stability, instability and global stability… read more here.

Keywords: allee effect; food chain; model; chain model ... See more keywords
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Identification and regulation of ecotoxicity of polychlorinated naphthalenes to aquatic food Chain (green algae-Daphnia magna-fish).

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Published in 2021 at "Aquatic toxicology"

DOI: 10.1016/j.aquatox.2021.105774

Abstract: Polychlorinated naphthalenes (PCNs) are widely distributed in the aquatic environment and can be transmitted through the food chain, which can amplify their toxic effects on human. To inhibit their transmission in the trophic level, this… read more here.

Keywords: food chain; toxicity; food; aquatic food ... See more keywords
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Biotransfer of Cd along a soil-plant- mealybug-ladybird food chain: A comparison with host plants.

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Published in 2017 at "Chemosphere"

DOI: 10.1016/j.chemosphere.2016.11.005

Abstract: Agro-ecosystem contamination by the heavy metals present in different agricultural products is a serious challenge faced by the living organisms. This study explains the cadmium (Cd) transfer from soils contaminated with different cadmium concentrations through… read more here.

Keywords: mealybug ladybird; plant; food chain; transfer ... See more keywords
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Uptake, accumulation and elimination of cadmium in a soil - Faba bean (Vicia faba) - Aphid (Aphis fabae) - Ladybird (Coccinella transversalis) food chain.

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Published in 2021 at "Chemosphere"

DOI: 10.1016/j.chemosphere.2021.130522

Abstract: Cadmium is a highly mobile toxic heavy metal and a serious hazard to the biosphere. We studied uptake, accumulation and elimination of cadmium in a soil - faba bean - aphid - ladybird food chain.… read more here.

Keywords: soil; food chain; faba bean; cadmium ... See more keywords