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Datasets of project "European Project on Ocean Acidification"

Mostrando recursos 121 - 140 de 1.258

  1. Ocean acidification and its potential effects on the early life-history of non-calcifying and calcifying echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) larvae, 2011

    Gonzalez Bernat, Maria Jose
    Ocean acidification, as a result of increased atmospheric CO2, has the potential to adversely affect the larval stages of many marine organisms and hence have profound effects on marine ecosystems. This is the first study of its kind to investigate the effects of ocean acidification on the early life-history stages of three echinoderms species, two asteroids and one irregular echinoid. Potential latitudinal variations on the effects of ocean acidification were also investigated by selecting a polar species (Odontaster validus), a temperate species (Patiriella regularis), and a tropical species (Arachnoides placenta). The effects of reduced seawater pH levels on the fertilization...

  2. Ocean acidification and its potential effects on the early life-history of non-calcifying and calcifying echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) larvae, 2011

    Gonzalez Bernat, Maria Jose
    Ocean acidification, as a result of increased atmospheric CO2, has the potential to adversely affect the larval stages of many marine organisms and hence have profound effects on marine ecosystems. This is the first study of its kind to investigate the effects of ocean acidification on the early life-history stages of three echinoderms species, two asteroids and one irregular echinoid. Potential latitudinal variations on the effects of ocean acidification were also investigated by selecting a polar species (Odontaster validus), a temperate species (Patiriella regularis), and a tropical species (Arachnoides placenta). The effects of reduced seawater pH levels on the fertilization...

  3. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) size during experiments, 2011

    Gonzalez Bernat, Maria Jose

  4. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) size during experiments, 2011

    Gonzalez Bernat, Maria Jose

  5. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) survival during experiments, 2011

    Gonzalez Bernat, Maria Jose

  6. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) survival during experiments, 2011

    Gonzalez Bernat, Maria Jose

  7. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) survival during experiments, 2011

    Gonzalez Bernat, Maria Jose

  8. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) survival during experiments, 2011

    Gonzalez Bernat, Maria Jose

  9. Seawater carbonate chemistry and crab Necora puber size and elements in tissue during experiments, 2010

    Small, Daniel; Calosi, Piero; White, Daniel; Spicer, John I; Widdicombe, Stephen
    Ocean acidification (OA) is predicted to play a major role in shaping species biogeography and marine biodiversity over the next century. We tested the effect of medium-term exposure to OA (pH 8.00, 7.30 and 6.70 for 30 d) on acid-base balance in the decapod crab Necora puber-a species that is known to possess good extracellular buffering ability during short-term exposure to hypercapnic conditions. To determine if crabs undergo physiological trade-offs in order to buffer their haemolymph, we characterised a number of fundamental physiological functions, i.e. metabolic rate, tolerance to heat, carapace and chelae [Ca2+] and [Mg2+], haemolymph [Ca2+] and [Mg2+],...

  10. Seawater carbonate chemistry and crab Necora puber size and elements in tissue during experiments, 2010

    Small, Daniel; Calosi, Piero; White, Daniel; Spicer, John I; Widdicombe, Stephen
    Ocean acidification (OA) is predicted to play a major role in shaping species biogeography and marine biodiversity over the next century. We tested the effect of medium-term exposure to OA (pH 8.00, 7.30 and 6.70 for 30 d) on acid-base balance in the decapod crab Necora puber-a species that is known to possess good extracellular buffering ability during short-term exposure to hypercapnic conditions. To determine if crabs undergo physiological trade-offs in order to buffer their haemolymph, we characterised a number of fundamental physiological functions, i.e. metabolic rate, tolerance to heat, carapace and chelae [Ca2+] and [Mg2+], haemolymph [Ca2+] and [Mg2+],...

  11. Seawater carbonate chemistry and crab Necora puber size and elements in tissue during experiments, 2010

    Small, Daniel; Calosi, Piero; White, Daniel; Spicer, John I; Widdicombe, Stephen
    Ocean acidification (OA) is predicted to play a major role in shaping species biogeography and marine biodiversity over the next century. We tested the effect of medium-term exposure to OA (pH 8.00, 7.30 and 6.70 for 30 d) on acid-base balance in the decapod crab Necora puber-a species that is known to possess good extracellular buffering ability during short-term exposure to hypercapnic conditions. To determine if crabs undergo physiological trade-offs in order to buffer their haemolymph, we characterised a number of fundamental physiological functions, i.e. metabolic rate, tolerance to heat, carapace and chelae [Ca2+] and [Mg2+], haemolymph [Ca2+] and [Mg2+],...

  12. Seawater carbonate chemistry, nutrients, and Calcidiscus leptoporus (strain RCC1135) growth rate and calcification rate during experiments, 2012

    Langer, Gerald; Oetjen, Kerstin; Brenneis, Tina
    The coccolithophore Calcidiscus leptoporus was grown in batch culture under nitrogen (N) as well as phosphorus (P) limitation. Growth rate, particulate inorganic carbon (PIC), particulate organic carbon (POC), particulate organic nitrogen (PON), and particulate organic phosphorus (POP) production were determined and coccolith morphology was analysed. While PON production decreased by 70% under N-limitation and POP production decreased by 65% under P-limitation, growth rate decreased by 33% under N- as well as P-limitation. POC as well as PIC production (calcification rate) increased by 27% relative to the control under P-limitation, and did not change under N-limitation. Coccolith morphology did not change...

  13. Seawater carbonate chemistry, nutrients, and Calcidiscus leptoporus (strain RCC1135) growth rate and calcification rate during experiments, 2012

    Langer, Gerald; Oetjen, Kerstin; Brenneis, Tina
    The coccolithophore Calcidiscus leptoporus was grown in batch culture under nitrogen (N) as well as phosphorus (P) limitation. Growth rate, particulate inorganic carbon (PIC), particulate organic carbon (POC), particulate organic nitrogen (PON), and particulate organic phosphorus (POP) production were determined and coccolith morphology was analysed. While PON production decreased by 70% under N-limitation and POP production decreased by 65% under P-limitation, growth rate decreased by 33% under N- as well as P-limitation. POC as well as PIC production (calcification rate) increased by 27% relative to the control under P-limitation, and did not change under N-limitation. Coccolith morphology did not change...

  14. Seawater carbonate chemistry, nutrients, and Calcidiscus leptoporus (strain RCC1135) growth rate and calcification rate during experiments, 2012

    Langer, Gerald; Oetjen, Kerstin; Brenneis, Tina
    The coccolithophore Calcidiscus leptoporus was grown in batch culture under nitrogen (N) as well as phosphorus (P) limitation. Growth rate, particulate inorganic carbon (PIC), particulate organic carbon (POC), particulate organic nitrogen (PON), and particulate organic phosphorus (POP) production were determined and coccolith morphology was analysed. While PON production decreased by 70% under N-limitation and POP production decreased by 65% under P-limitation, growth rate decreased by 33% under N- as well as P-limitation. POC as well as PIC production (calcification rate) increased by 27% relative to the control under P-limitation, and did not change under N-limitation. Coccolith morphology did not change...

  15. Seawater carbonate chemistry, nutrients, chlorophyll and diatom Proboscia alata during experiments, 2012

    Hoogstraten, Astrid; Timmermans, Klaas R; de Baar, Hein J W
    The combined effects of different light and aqueous CO2 conditions were assessed for the Southern Ocean diatom Proboscia alata(Brightwell) Sundström in laboratory experiments. Selected culture conditions (light and CO2(aq)) were representative for the natural ranges in the modern Southern Ocean. Light conditions were 40 (low) and 240 (high) µmol photons/m**2/s. The three CO2(aq) conditions ranged from 8 to 34 µmol/kg CO2(aq) (equivalent to a pCO2 from 137 to 598 µatm, respectively). Clear morphological changes were induced by these different CO2(aq) conditions. Cells in low [CO2(aq)] formed spirals, while many cells in high [CO2(aq)] disintegrated. Cell size and volume were significantly...

  16. Seawater carbonate chemistry, nutrients, chlorophyll and diatom Proboscia alata during experiments, 2012

    Hoogstraten, Astrid; Timmermans, Klaas R; de Baar, Hein J W
    The combined effects of different light and aqueous CO2 conditions were assessed for the Southern Ocean diatom Proboscia alata(Brightwell) Sundström in laboratory experiments. Selected culture conditions (light and CO2(aq)) were representative for the natural ranges in the modern Southern Ocean. Light conditions were 40 (low) and 240 (high) µmol photons/m**2/s. The three CO2(aq) conditions ranged from 8 to 34 µmol/kg CO2(aq) (equivalent to a pCO2 from 137 to 598 µatm, respectively). Clear morphological changes were induced by these different CO2(aq) conditions. Cells in low [CO2(aq)] formed spirals, while many cells in high [CO2(aq)] disintegrated. Cell size and volume were significantly...

  17. Seawater carbonate chemistry, nutrients, chlorophyll and diatom Proboscia alata during experiments, 2012

    Hoogstraten, Astrid; Timmermans, Klaas R; de Baar, Hein J W
    The combined effects of different light and aqueous CO2 conditions were assessed for the Southern Ocean diatom Proboscia alata(Brightwell) Sundström in laboratory experiments. Selected culture conditions (light and CO2(aq)) were representative for the natural ranges in the modern Southern Ocean. Light conditions were 40 (low) and 240 (high) µmol photons/m**2/s. The three CO2(aq) conditions ranged from 8 to 34 µmol/kg CO2(aq) (equivalent to a pCO2 from 137 to 598 µatm, respectively). Clear morphological changes were induced by these different CO2(aq) conditions. Cells in low [CO2(aq)] formed spirals, while many cells in high [CO2(aq)] disintegrated. Cell size and volume were significantly...

  18. 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

  19. 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

  20. 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...

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