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Hans Blanck - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Seven Antifouling Compounds on Photosynthesis and Inorganic Carbon Use in Sugar Kelp Saccharina latissima (Linnaeus)
    Archives of Environmental Contamination and Toxicology, 2012
    Co-Authors: Per Johansson, Karl Martin Eriksson, Lennart Axelsson, Hans Blanck
    Abstract:

    Macroalgae depend on Carbon-concentrating mechanisms (CCMs) to maintain a high photosynthetic activity under conditions of low Carbon dioxide (CO_2) availability. Because such conditions are prevalent in marine environments, CCMs are important for upholding the macroalgal primary productivity in coastal zones. This study evaluated the effects of seven antifouling compounds—chlorothalonil, DCOIT, dichlofluanid, diuron, irgarol, tolylfluanid, and zinc pyrithione (ZnTP)—on the photosynthesis and CCM of sugar kelp ( Saccharina latissima (L.)). Concentration-response curves of these toxicants were established using inhibition of Carbon Incorporation, whereas their effects over time and their inhibition of the CCM were studied using inhibition of O_2 evolution. We demonstrate that exposure to all compounds except ZnTP (

  • effects of seven antifouling compounds on photosynthesis and inorganic Carbon use in sugar kelp saccharina latissima linnaeus
    Archives of Environmental Contamination and Toxicology, 2012
    Co-Authors: Per Johansson, Karl Martin Eriksson, Lennart Axelsson, Hans Blanck
    Abstract:

    Macroalgae depend on Carbon-concentrating mechanisms (CCMs) to maintain a high photosynthetic activity under conditions of low Carbon dioxide (CO2) availability. Because such conditions are prevalent in marine environments, CCMs are important for upholding the macroalgal primary productivity in coastal zones. This study evaluated the effects of seven antifouling compounds—chlorothalonil, DCOIT, dichlofluanid, diuron, irgarol, tolylfluanid, and zinc pyrithione (ZnTP)—on the photosynthesis and CCM of sugar kelp (Saccharina latissima (L.)). Concentration-response curves of these toxicants were established using inhibition of Carbon Incorporation, whereas their effects over time and their inhibition of the CCM were studied using inhibition of O2 evolution. We demonstrate that exposure to all compounds except ZnTP (< 1000 nM) resulted in toxicity to photosynthesis of S. latissima. However, Carbon Incorporation and O2 evolution differed in their ability to detect toxicity from some of the compounds. Diuron, irgarol, DCOIT, tolylfluanid, and, to some extent, dichlofluanid inhibited Carbon Incorporation. Chlorothalonil did not inhibit Carbon Incorporation but clearly inhibited oxygen (O2) evolution. Photosynthesis showed only little recovery during the 2-h postexposure period. Inhibition of photosynthesis even increased after the end of exposure to chlorothalonil and tolylfluanid. Through changes in pH of the medium, toxic effects on the CCM could be studied isolated from photosynthesis effects. The CCM of S. latissima was inhibited by chlorothalonil, DCOIT, dichlofluanid, and tolylfluanid. Such inhibition of the CCM, or the absence thereof, deepens the understanding the mechanism of action of the studied compounds.

Per Johansson - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Seven Antifouling Compounds on Photosynthesis and Inorganic Carbon Use in Sugar Kelp Saccharina latissima (Linnaeus)
    Archives of Environmental Contamination and Toxicology, 2012
    Co-Authors: Per Johansson, Karl Martin Eriksson, Lennart Axelsson, Hans Blanck
    Abstract:

    Macroalgae depend on Carbon-concentrating mechanisms (CCMs) to maintain a high photosynthetic activity under conditions of low Carbon dioxide (CO_2) availability. Because such conditions are prevalent in marine environments, CCMs are important for upholding the macroalgal primary productivity in coastal zones. This study evaluated the effects of seven antifouling compounds—chlorothalonil, DCOIT, dichlofluanid, diuron, irgarol, tolylfluanid, and zinc pyrithione (ZnTP)—on the photosynthesis and CCM of sugar kelp ( Saccharina latissima (L.)). Concentration-response curves of these toxicants were established using inhibition of Carbon Incorporation, whereas their effects over time and their inhibition of the CCM were studied using inhibition of O_2 evolution. We demonstrate that exposure to all compounds except ZnTP (

  • effects of seven antifouling compounds on photosynthesis and inorganic Carbon use in sugar kelp saccharina latissima linnaeus
    Archives of Environmental Contamination and Toxicology, 2012
    Co-Authors: Per Johansson, Karl Martin Eriksson, Lennart Axelsson, Hans Blanck
    Abstract:

    Macroalgae depend on Carbon-concentrating mechanisms (CCMs) to maintain a high photosynthetic activity under conditions of low Carbon dioxide (CO2) availability. Because such conditions are prevalent in marine environments, CCMs are important for upholding the macroalgal primary productivity in coastal zones. This study evaluated the effects of seven antifouling compounds—chlorothalonil, DCOIT, dichlofluanid, diuron, irgarol, tolylfluanid, and zinc pyrithione (ZnTP)—on the photosynthesis and CCM of sugar kelp (Saccharina latissima (L.)). Concentration-response curves of these toxicants were established using inhibition of Carbon Incorporation, whereas their effects over time and their inhibition of the CCM were studied using inhibition of O2 evolution. We demonstrate that exposure to all compounds except ZnTP (< 1000 nM) resulted in toxicity to photosynthesis of S. latissima. However, Carbon Incorporation and O2 evolution differed in their ability to detect toxicity from some of the compounds. Diuron, irgarol, DCOIT, tolylfluanid, and, to some extent, dichlofluanid inhibited Carbon Incorporation. Chlorothalonil did not inhibit Carbon Incorporation but clearly inhibited oxygen (O2) evolution. Photosynthesis showed only little recovery during the 2-h postexposure period. Inhibition of photosynthesis even increased after the end of exposure to chlorothalonil and tolylfluanid. Through changes in pH of the medium, toxic effects on the CCM could be studied isolated from photosynthesis effects. The CCM of S. latissima was inhibited by chlorothalonil, DCOIT, dichlofluanid, and tolylfluanid. Such inhibition of the CCM, or the absence thereof, deepens the understanding the mechanism of action of the studied compounds.

Fumio Inagaki - One of the best experts on this subject based on the ideXlab platform.

  • Aerobic microbial life persists in oxic marine sediment as old as 101.5 million years
    Nature Communications, 2020
    Co-Authors: Yuki Morono, Tatsuhiko Hoshino, Takeshi Terada, Tomoyuki Hori, Minoru Ikehara, Steven D’hondt, Fumio Inagaki
    Abstract:

    Sparse microbial populations persist from seafloor to basement in the slowly accumulating oxic sediment of the oligotrophic South Pacific Gyre (SPG). The physiological status of these communities, including their substrate metabolism, is previously unconstrained. Here we show that diverse aerobic members of communities in SPG sediments (4.3‒101.5 Ma) are capable of readily incorporating Carbon and nitrogen substrates and dividing. Most of the 6986 individual cells analyzed with nanometer-scale secondary ion mass spectrometry (NanoSIMS) actively incorporated isotope-labeled substrates. Many cells responded rapidly to incubation conditions, increasing total numbers by 4 orders of magnitude and taking up labeled Carbon and nitrogen within 68 days after incubation. The response was generally faster (on average, 3.09 times) for nitrogen Incorporation than for Carbon Incorporation. In contrast, anaerobic microbes were only minimally revived from this oxic sediment. Our results suggest that microbial communities widely distributed in organic-poor abyssal sediment consist mainly of aerobes that retain their metabolic potential under extremely low-energy conditions for up to 101.5 Ma. The discovery of aerobic microbial communities in nutrient-poor sediments below the seafloor begs the question of the mechanisms for their persistence. Here the authors investigate subseafloor sediment in the South Pacific Gyre abyssal plain, showing that aerobic microbial life can be revived and retain metabolic potential even from 101.5 Ma-old sediment.

Karl Martin Eriksson - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Seven Antifouling Compounds on Photosynthesis and Inorganic Carbon Use in Sugar Kelp Saccharina latissima (Linnaeus)
    Archives of Environmental Contamination and Toxicology, 2012
    Co-Authors: Per Johansson, Karl Martin Eriksson, Lennart Axelsson, Hans Blanck
    Abstract:

    Macroalgae depend on Carbon-concentrating mechanisms (CCMs) to maintain a high photosynthetic activity under conditions of low Carbon dioxide (CO_2) availability. Because such conditions are prevalent in marine environments, CCMs are important for upholding the macroalgal primary productivity in coastal zones. This study evaluated the effects of seven antifouling compounds—chlorothalonil, DCOIT, dichlofluanid, diuron, irgarol, tolylfluanid, and zinc pyrithione (ZnTP)—on the photosynthesis and CCM of sugar kelp ( Saccharina latissima (L.)). Concentration-response curves of these toxicants were established using inhibition of Carbon Incorporation, whereas their effects over time and their inhibition of the CCM were studied using inhibition of O_2 evolution. We demonstrate that exposure to all compounds except ZnTP (

  • effects of seven antifouling compounds on photosynthesis and inorganic Carbon use in sugar kelp saccharina latissima linnaeus
    Archives of Environmental Contamination and Toxicology, 2012
    Co-Authors: Per Johansson, Karl Martin Eriksson, Lennart Axelsson, Hans Blanck
    Abstract:

    Macroalgae depend on Carbon-concentrating mechanisms (CCMs) to maintain a high photosynthetic activity under conditions of low Carbon dioxide (CO2) availability. Because such conditions are prevalent in marine environments, CCMs are important for upholding the macroalgal primary productivity in coastal zones. This study evaluated the effects of seven antifouling compounds—chlorothalonil, DCOIT, dichlofluanid, diuron, irgarol, tolylfluanid, and zinc pyrithione (ZnTP)—on the photosynthesis and CCM of sugar kelp (Saccharina latissima (L.)). Concentration-response curves of these toxicants were established using inhibition of Carbon Incorporation, whereas their effects over time and their inhibition of the CCM were studied using inhibition of O2 evolution. We demonstrate that exposure to all compounds except ZnTP (< 1000 nM) resulted in toxicity to photosynthesis of S. latissima. However, Carbon Incorporation and O2 evolution differed in their ability to detect toxicity from some of the compounds. Diuron, irgarol, DCOIT, tolylfluanid, and, to some extent, dichlofluanid inhibited Carbon Incorporation. Chlorothalonil did not inhibit Carbon Incorporation but clearly inhibited oxygen (O2) evolution. Photosynthesis showed only little recovery during the 2-h postexposure period. Inhibition of photosynthesis even increased after the end of exposure to chlorothalonil and tolylfluanid. Through changes in pH of the medium, toxic effects on the CCM could be studied isolated from photosynthesis effects. The CCM of S. latissima was inhibited by chlorothalonil, DCOIT, dichlofluanid, and tolylfluanid. Such inhibition of the CCM, or the absence thereof, deepens the understanding the mechanism of action of the studied compounds.

Lennart Axelsson - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Seven Antifouling Compounds on Photosynthesis and Inorganic Carbon Use in Sugar Kelp Saccharina latissima (Linnaeus)
    Archives of Environmental Contamination and Toxicology, 2012
    Co-Authors: Per Johansson, Karl Martin Eriksson, Lennart Axelsson, Hans Blanck
    Abstract:

    Macroalgae depend on Carbon-concentrating mechanisms (CCMs) to maintain a high photosynthetic activity under conditions of low Carbon dioxide (CO_2) availability. Because such conditions are prevalent in marine environments, CCMs are important for upholding the macroalgal primary productivity in coastal zones. This study evaluated the effects of seven antifouling compounds—chlorothalonil, DCOIT, dichlofluanid, diuron, irgarol, tolylfluanid, and zinc pyrithione (ZnTP)—on the photosynthesis and CCM of sugar kelp ( Saccharina latissima (L.)). Concentration-response curves of these toxicants were established using inhibition of Carbon Incorporation, whereas their effects over time and their inhibition of the CCM were studied using inhibition of O_2 evolution. We demonstrate that exposure to all compounds except ZnTP (

  • effects of seven antifouling compounds on photosynthesis and inorganic Carbon use in sugar kelp saccharina latissima linnaeus
    Archives of Environmental Contamination and Toxicology, 2012
    Co-Authors: Per Johansson, Karl Martin Eriksson, Lennart Axelsson, Hans Blanck
    Abstract:

    Macroalgae depend on Carbon-concentrating mechanisms (CCMs) to maintain a high photosynthetic activity under conditions of low Carbon dioxide (CO2) availability. Because such conditions are prevalent in marine environments, CCMs are important for upholding the macroalgal primary productivity in coastal zones. This study evaluated the effects of seven antifouling compounds—chlorothalonil, DCOIT, dichlofluanid, diuron, irgarol, tolylfluanid, and zinc pyrithione (ZnTP)—on the photosynthesis and CCM of sugar kelp (Saccharina latissima (L.)). Concentration-response curves of these toxicants were established using inhibition of Carbon Incorporation, whereas their effects over time and their inhibition of the CCM were studied using inhibition of O2 evolution. We demonstrate that exposure to all compounds except ZnTP (< 1000 nM) resulted in toxicity to photosynthesis of S. latissima. However, Carbon Incorporation and O2 evolution differed in their ability to detect toxicity from some of the compounds. Diuron, irgarol, DCOIT, tolylfluanid, and, to some extent, dichlofluanid inhibited Carbon Incorporation. Chlorothalonil did not inhibit Carbon Incorporation but clearly inhibited oxygen (O2) evolution. Photosynthesis showed only little recovery during the 2-h postexposure period. Inhibition of photosynthesis even increased after the end of exposure to chlorothalonil and tolylfluanid. Through changes in pH of the medium, toxic effects on the CCM could be studied isolated from photosynthesis effects. The CCM of S. latissima was inhibited by chlorothalonil, DCOIT, dichlofluanid, and tolylfluanid. Such inhibition of the CCM, or the absence thereof, deepens the understanding the mechanism of action of the studied compounds.