Hyposalinity affects diurnal photoacclimation patterns in the rhodophyte Palmaria palmata under mimicked Arctic summer conditions: raw data from laboratory physiological measurements

• Main Authors: Marambio, Johanna, Rosenfeld, Sebastian, Bischof, Kai
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Antioxidant activity 2,2-diphenyl-1-picrylhydrazyl; Arctic; Arctic Biodiversity & Livelihoods; beta-Carotene; Biological sample; BIOS; Chlorophyll a; Climate change; Duration; number of days; FACE-IT; Family; Kongsfjorden; Spitsbergen; Lutein; Non photochemical quenching; light curve 0; light curve 100; light curve 200; light curve 300; light curve 400; light curve 500; light curve 600; Ny-Ålesund; Palmaria palmata; Photochemical quantum yield; Photosynthetic parameters; pigments; Pulse amplitude modulation (PAM) fluorometry; Replication; Salinity; seaweed; Species; unique identification; unique identification (Semantic URI); unique identification (URI); Treatment: light intensity; Treatment: salinity; Zeaxanthin; Arctic biodiversity; Kongsfjord*; Ny Ålesund; Svalbard
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.956547; https://doi.org/10.1594/PANGAEA.956547

The Arctic is one area that has been affected by rising temperatures, leading to an increase in meltwater in the water column. During the months of June/July 2019, fronds of the red seaweed Palmaria palmata in Kongsfjorden, Svalbard (78°55'56.0N 11°55'59.6E) were colected in the intertidal zone. For 21 days at 0ºC, P. palmata was subjected to variations of irradiance cycles and three different salinities SA 34 (control), 28 and 18 in laboratory conditions. Subsequently, measurements in triplicate (n=3) were made of photosynthetic parameters such as maximal quantum yield of PSII (Fv/Fm), non-photochemical quenching (NPQ), biochemical parameters such as quantification of pigments chlorophyll a (Chl a), lutein (Lut), zeaxanthin (Zeax), β-carotene (β-Car), and antioxidant activity 2,2-diphenyl-1-picrylhydrazyl (DPPH).