Coping with a changing Arctic: mechanisms of acclimation in the brown seaweed Saccharina latissima from Spitsbergen - raw data to 2-factor experiments with field material from Kongsfjorden, June/July 2019 ...

• Main Authors: Diehl, Nora, Bischof, Kai
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2021
• Subjects: CN; interactive effects; kelp; Mannitol; nutrients; pigments; Salinity; Temperature; Kongsfjord*; Kongsfjorden; Ny Ålesund; Ny-Ålesund; Svalbard; Spitsbergen
• Online Access: https://dx.doi.org/10.1594/pangaea.926970; https://doi.pangaea.de/10.1594/PANGAEA.926970

Polar Regions are facing rapid temperature increase. Combined with other factors temperature increase might have a strong impact on foundation species in Arctic shallow-water coastal ecosystems, such as the abundant kelp Saccharina latissima. We ran two short-term 2-factor experiments with field samples from Kongsfjorden (Svalbard) to reveal the impact of temperature increase in summer combined with hyposalinity (temperature × salinity) or nutrient enrichment (temperature × nutrients) and analyzed different biochemical and physiological parameters. The experiments were conducted with field samples at AWIPEV Station in Ny-Ålesund, Svalbard (Spitsbergen) in June/July 2019. As physiological parameter, size and the maximum photosynthetic quantum yield of photosystem II (Fv/Fm; Imaging-PAM, Walz GmbH Mess- und Regeltechnik, Effeltrich, Germany) were monitored every second day. For growth, the size of the algal discs was analyzed with ImageJ (Version 1.52a). For better comparison of the physiological parameters, ...