Photosynthesis versus irradiance curves of Laminaria hyperborea off the island of Helgoland in summer 2014
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| Auteurs principaux: | , , , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2023
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| _version_ | 1867171326292131840 |
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| author | Franke, Kiara Matthes, Lisa C Graiff, Angelika Karsten, Ulf Bartsch, Inka |
| author_facet | Franke, Kiara Matthes, Lisa C Graiff, Angelika Karsten, Ulf Bartsch, Inka |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Laminaria hyperborea off the island of Helgoland (North Sea, Germany) was sampled along a depth gradient (0.5, 2, 4, 6 m) throughout summer 2014. Discs were cut from three different blade regions (5, 25 and 50 cm above the stipe-blade transition zone) and set into photosynthesis versus irradiance (PI) curves. Incident light was generated by a slide projector (Liesegang Dianfant, Leitz Prado, Germany) equipped with a halogen lamp (Osram Xenophot 400 W/36 V, Germany) and 11 Schott neutral gray filters. Eleven light steps were conducted between 0 and 560 µmol photons m-2 s-1. Dark respiration was measured first for 20 mins followed by increasing light steps in 10 min intervals. Oxygen concentration expressed in % air saturation was logged by the OxyView software (Presens, Regensburg, Germany) and corrected for air pressure, salinity and logged temperature according to Tengberg et al. (2006). During post-processing, the oxygen production rate for each photon flux density (PFD) level was calculated by plotting a linear regression model through all O2-values measured during the time interval, and was normalized to either fresh mass (FM, unit: µmol O2 g–1 h–1) or disc surface area (DA, unit: µmol O2 cm–2 h–1). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_958899 |
| institution | PANGAEA |
| language | en |
| publishDate | 2023 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Photosynthesis versus irradiance curves of Laminaria hyperborea off the island of Helgoland in summer 2014 Franke, Kiara Matthes, Lisa C Graiff, Angelika Karsten, Ulf Bartsch, Inka blade gradient; Calculated, see abstract; Chlorophyll a; DEPTH, water; depth gradient; diffuse attenuation coefficient; dry mass/area ratio; Event label; Fv/Fm; Helgoland; Helgoland__Campaign; Helgoland_2014_5; Helgoland_2014_6; Helgoland_2014_7; Helgoland_2014_8; in situ PAR; Irradiance; Kelp; Laminaria hyperborea, blade region; Marine Station Helgoland; net primary production; off Helgoland, North Sea; oxygen evolution; Oxygen production rate, per disc area; Oxygen production rate, per fresh mass; photoacclimation; Photosynthesis versus irradiance curves; Primary production; Replicate; SCUBA-DIVE; Slide projector Laminaria hyperborea off the island of Helgoland (North Sea, Germany) was sampled along a depth gradient (0.5, 2, 4, 6 m) throughout summer 2014. Discs were cut from three different blade regions (5, 25 and 50 cm above the stipe-blade transition zone) and set into photosynthesis versus irradiance (PI) curves. Incident light was generated by a slide projector (Liesegang Dianfant, Leitz Prado, Germany) equipped with a halogen lamp (Osram Xenophot 400 W/36 V, Germany) and 11 Schott neutral gray filters. Eleven light steps were conducted between 0 and 560 µmol photons m-2 s-1. Dark respiration was measured first for 20 mins followed by increasing light steps in 10 min intervals. Oxygen concentration expressed in % air saturation was logged by the OxyView software (Presens, Regensburg, Germany) and corrected for air pressure, salinity and logged temperature according to Tengberg et al. (2006). During post-processing, the oxygen production rate for each photon flux density (PFD) level was calculated by plotting a linear regression model through all O2-values measured during the time interval, and was normalized to either fresh mass (FM, unit: µmol O2 g–1 h–1) or disc surface area (DA, unit: µmol O2 cm–2 h–1). |
| title | Photosynthesis versus irradiance curves of Laminaria hyperborea off the island of Helgoland in summer 2014 |
| topic | blade gradient; Calculated, see abstract; Chlorophyll a; DEPTH, water; depth gradient; diffuse attenuation coefficient; dry mass/area ratio; Event label; Fv/Fm; Helgoland; Helgoland__Campaign; Helgoland_2014_5; Helgoland_2014_6; Helgoland_2014_7; Helgoland_2014_8; in situ PAR; Irradiance; Kelp; Laminaria hyperborea, blade region; Marine Station Helgoland; net primary production; off Helgoland, North Sea; oxygen evolution; Oxygen production rate, per disc area; Oxygen production rate, per fresh mass; photoacclimation; Photosynthesis versus irradiance curves; Primary production; Replicate; SCUBA-DIVE; Slide projector |
| url | https://doi.org/10.1594/PANGAEA.958899 |