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Datasets of project "European Project on Ocean Acidification"

Mostrando recursos 121 - 140 de 1.118

  1. Seawater carbonate chemistry, nutrients, chlorophyll, and growth rate of Phaeocystis globosa (strain Pg G''A'') during experiments, 2011

    Hoogstraten, Astrid; Peters, M; Timmermans, Klaas R; de Baar, Hein J W

  2. Seawater carbonate chemistry and severe tissue damage in Atlantic cod larvae under increasing ocean acidification, 2012

    Frommel, Andrea Y; Maneja, Rommel H; Lowe, David J; Malzahn, Arne M; Geffen, Audrey J; Folkvord, Arild; Piatkowski, Uwe; Reusch, Thorsten B H; Clemmesen, Catriona
    Ocean acidification, caused by increasing atmospheric concentrations of CO2, is one of the most critical anthropogenicthreats to marine life. Changes in seawater carbonate chemistry have the potential to disturb calcification, acid-base regulation, blood circulation and respiration, as well as the nervous system of marine organisms, leading to long-term effects such as reduced growth rates and reproduction. In teleost fishes, early life-history stages are particularly vulnerable as they lack specialized internal pH regulatory mechanisms. So far, impacts of relevant CO2concentrations on larval fish have been found in behaviour and otolith size, mainly in tropical, non-commercial species. Here we show detrimental effects...

  3. Seawater carbonate chemistry and Atlantic cod, Gadus morhua tissue damage during experiments, 2012

    Frommel, Andrea Y; Maneja, Rommel H; Lowe, David J; Malzahn, Arne M; Geffen, Audrey J; Folkvord, Arild; Piatkowski, Uwe; Reusch, Thorsten B H; Clemmesen, Catriona

  4. Seawater carbonate chemistry and Atlantic cod, Gadus morhua dry mass and lipid content during experiments, 2012

    Frommel, Andrea Y; Maneja, Rommel H; Lowe, David J; Malzahn, Arne M; Geffen, Audrey J; Folkvord, Arild; Piatkowski, Uwe; Reusch, Thorsten B H; Clemmesen, Catriona

  5. Seawater carbonate chemistry and Atlantic cod, Gadus morhua dry mass and protein content during experiments, 2012

    Frommel, Andrea Y; Maneja, Rommel H; Lowe, David J; Malzahn, Arne M; Geffen, Audrey J; Folkvord, Arild; Piatkowski, Uwe; Reusch, Thorsten B H; Clemmesen, Catriona

  6. Egg and early larval stages of Baltic cod, Gadus morhua duirng ocean acidification experiments, 2012

    Frommel, Andrea Y; Schubert, Alexander; Piatkowski, Uwe; Clemmesen, Catriona
    The accumulation of carbon dioxide in the atmosphere will lower the pH in ocean waters, a process termed ocean acidification (OA). Despite its potentially detrimental effects on calcifying organisms, experimental studies on the possible impacts on fish remain scarce. While adults will most likely remain relatively unaffected by changes in seawater pH, early life-history stages are potentially more sensitive, due to the lack of gills with specialized ion-regulatory mechanisms. We tested the effects of OA on growth and development of embryos and larvae of eastern Baltic cod, the commercially most important fish stock in the Baltic Sea. Cod were reared...

  7. Seawater carbonate chemistry and Gadus morhua otholith diameter, radius, area and circumference during experiments (Experiment 5), 2012

    Frommel, Andrea Y; Schubert, Alexander; Piatkowski, Uwe; Clemmesen, Catriona

  8. Seawater carbonate chemistry and DNA, RNA, proteins and mass of Gadus morhua during experiments (Experiment 5), 2012

    Frommel, Andrea Y; Schubert, Alexander; Piatkowski, Uwe; Clemmesen, Catriona

  9. Seawater carbonate chemistry and DNA, RNA, proteins and mass of Gadus morhua during experiments (Experiment 4), 2012

    Frommel, Andrea Y; Schubert, Alexander; Piatkowski, Uwe; Clemmesen, Catriona

  10. Seawater carbonate chemistry and DNA, RNA, proteins and mass of Gadus morhua during experiments (Experiment 3), 2012

    Frommel, Andrea Y; Schubert, Alexander; Piatkowski, Uwe; Clemmesen, Catriona

  11. Seawater carbonate chemistry and size of Gadus morhua during experiments (Experiment 2), 2012

    Frommel, Andrea Y; Schubert, Alexander; Piatkowski, Uwe; Clemmesen, Catriona

  12. Seawater carbonate chemistry and eggs, larvae and hatching success of Gadus morhua during experiments (Experiment 2), 2012

    Frommel, Andrea Y; Schubert, Alexander; Piatkowski, Uwe; Clemmesen, Catriona

  13. Seawater carbonate chemistry and eggs, larvae and hatching success of Gadus morhua during experiments (Experiment 1), 2012

    Frommel, Andrea Y; Schubert, Alexander; Piatkowski, Uwe; Clemmesen, Catriona

  14. Seawater carbonate chemistry and calcification rate of cold-water coral Lophelia pertusa during experiments, 2011

    Form, Armin; Riebesell, Ulf
    Ocean acidity has increased by 30% since preindustrial times due to the uptake of anthropogenic CO2 and is projected to rise by another 120% before 2100 if CO2 emissions continue at current rates. Ocean acidification is expected to have wide-ranging impacts on marine life, including reduced growth and net erosion of coral reefs. Our present understanding of the impacts of ocean acidification on marine life, however, relies heavily on results from short-term CO2 perturbation studies. Here we present results from the first long-term CO2 perturbation study on the dominant reef-building cold-water coral Lophelia pertusa and relate them to results from...

  15. Seawater carbonate chemistry and its effects on properties and sinking velocity of aggregates of the coccolithophore Emiliania huxleyi, 2010

    Biermann, Antje; Engel, Anja
    Coccolithophores play an important role in organic matter export due to their production of the mineral calcite that can act as ballast. Recent studies indicated that calcification in coccolithophores may be affected by changes in seawater carbonate chemistry. We investigated the influence of CO2 on the aggregation and sinking behaviour of the coccolithophore Emiliania huxleyi (PML B92/11) during a laboratory experiment. The coccolithophores were grown under low (~180 µatm), medium (~380 µatm), and high (~750 µatm) CO2 conditions. Aggregation of the cells was promoted using roller tables. Size and settling velocity of aggregates were determined during the incubation using video...

  16. Seawater carbonate chemistry and its effects on properties and sinking velocity of aggregates of the coccolithophore Emiliania huxleyi, 2010

    Biermann, Antje; Engel, Anja
    Coccolithophores play an important role in organic matter export due to their production of the mineral calcite that can act as ballast. Recent studies indicated that calcification in coccolithophores may be affected by changes in seawater carbonate chemistry. We investigated the influence of CO2 on the aggregation and sinking behaviour of the coccolithophore Emiliania huxleyi (PML B92/11) during a laboratory experiment. The coccolithophores were grown under low (~180 µatm), medium (~380 µatm), and high (~750 µatm) CO2 conditions. Aggregation of the cells was promoted using roller tables. Size and settling velocity of aggregates were determined during the incubation using video...

  17. Seawater carbonate chemistry and its effects on properties and sinking velocity of aggregates of the coccolithophore Emiliania huxleyi, 2010

    Biermann, Antje; Engel, Anja
    Coccolithophores play an important role in organic matter export due to their production of the mineral calcite that can act as ballast. Recent studies indicated that calcification in coccolithophores may be affected by changes in seawater carbonate chemistry. We investigated the influence of CO2 on the aggregation and sinking behaviour of the coccolithophore Emiliania huxleyi (PML B92/11) during a laboratory experiment. The coccolithophores were grown under low (~180 µatm), medium (~380 µatm), and high (~750 µatm) CO2 conditions. Aggregation of the cells was promoted using roller tables. Size and settling velocity of aggregates were determined during the incubation using video...

  18. Seawater carbonate chemistry and its effects on properties and sinking velocity of aggregates of the coccolithophore Emiliania huxleyi, 2010

    Biermann, Antje; Engel, Anja
    Coccolithophores play an important role in organic matter export due to their production of the mineral calcite that can act as ballast. Recent studies indicated that calcification in coccolithophores may be affected by changes in seawater carbonate chemistry. We investigated the influence of CO2 on the aggregation and sinking behaviour of the coccolithophore Emiliania huxleyi (PML B92/11) during a laboratory experiment. The coccolithophores were grown under low (~180 µatm), medium (~380 µatm), and high (~750 µatm) CO2 conditions. Aggregation of the cells was promoted using roller tables. Size and settling velocity of aggregates were determined during the incubation using video...

  19. Seawater carbonate chemistry and clownfish Amphiprion percula size and otholith development during experiments, 2011

    Munday, Philip L; Hernaman, V; Dixson, Danielle L; Thorrold, Simon R
    Calcification in many invertebrate species is predicted to decline due to ocean acidification. The potential effects of elevated CO2 and reduced carbonate saturation state on other species, such as fish, are less well understood. Fish otoliths (earbones) are composed of aragonite, and thus, might be susceptible to either the reduced availability of carbonate ions in seawater at low pH, or to changes in extracellular concentrations of bicarbonate and carbonate ions caused by acid-base regulation in fish exposed to high pCO2. We reared larvae of the clownfish Amphiprion percula from hatching to settlement at three pHNBS and pCO2 levels (control: ~pH...

  20. Seawater carbonate chemistry and clownfish Amphiprion percula size and otholith development during experiments, 2011

    Munday, Philip L; Hernaman, V; Dixson, Danielle L; Thorrold, Simon R
    Calcification in many invertebrate species is predicted to decline due to ocean acidification. The potential effects of elevated CO2 and reduced carbonate saturation state on other species, such as fish, are less well understood. Fish otoliths (earbones) are composed of aragonite, and thus, might be susceptible to either the reduced availability of carbonate ions in seawater at low pH, or to changes in extracellular concentrations of bicarbonate and carbonate ions caused by acid-base regulation in fish exposed to high pCO2. We reared larvae of the clownfish Amphiprion percula from hatching to settlement at three pHNBS and pCO2 levels (control: ~pH...

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