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Control measures of temperature, pH, salinity and oxygen as taken by WTW multimeter daily 3h after sunrise.
Organisms in intertidal zones experience fluctuations in environmental stressors such as hypoxia and temperature. These stressors and their fluctuations often appear in combination. Combination of stressors can have different effects compared to single stressors. In this study, we investigate the physiological effects of intermittent hypoxia in combination with different temperature regimes on the Pacific Oyster Crassostrea (Magallana) gigas. The oysters were exposed to hypoxic cycles (12h hypoxia by emersion/12h submersion) at normal (15°C), elevated (30°C) or fluctuating (15°C submersion/30°C emersion) temperature for 10 days. After the last submersion phase, the gills and digestive gland were sampled. We measured markers for bioenergetics and redox-balance in the gills and digestive gland using colorimetric methods as well as a set of metabolites (predominantly amino acids, osmolytes, anaerobic end products and energetic metabolites) in the gills using LC-MS/MS. Oysters kept submerged for up to 10 days were used as controls.
Monitoring stations from monitoring expedition of April 2002 with the oxygen concentration (points). Displayed areas of oxygen concentration (and hydrogen sulphide concentrations in the near bottom layer of the Baltic Sea. More details in the link "Marine Science Reports" (No. 100, chapter 3-5)
Monitoring stations from monitoring expedition of May 2000 with the oxygen concentration (points). Displayed areas of oxygen concentration (and hydrogen sulphide concentrations in the near bottom layer of the Baltic Sea. More details in the link "Marine Science Reports" (No. 100, chapter 3-5)
Monitoring stations from monitoring expedition of May 1999 with the oxygen concentration (points). Displayed areas of oxygen concentration (and hydrogen sulphide concentrations in the near bottom layer of the Baltic Sea. More details in the link "Marine Science Reports" (No. 100, chapter 3-5)
Monitoring stations from monitoring expedition of October 1995 with the oxygen concentration (points). Displayed areas of oxygen concentration (and hydrogen sulphide concentrations in the near bottom layer of the Baltic Sea. More details in the link "Marine Science Reports" (No. 100, chapter 3-5)
Monitoring stations from monitoring expedition of April 1986 with the oxygen concentration (points). Displayed areas of oxygen concentration (and hydrogen sulphide concentrations in the near bottom layer of the Baltic Sea. More details in the link "Marine Science Reports" (No. 100, chapter 3-5)
Hourly means of temperature and oxygen as logged in the tanks.
Grazing rates of the isopod Idotea sp. on the macroalga Fucus vesiculosus during upwelling 3 in response to warming and upwelling.
Abundances (numbers) of major grazer species in the tanks as assessed by subsamples taken at three time points (before upwelling 2 and 3 and between the two upwelling events).
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