PANGAEA_995904 In-situ conditions of two macroalgae along an Arctic fjord gradient in August 2024 Niedzwiedz, Sarina; Murray, Ayla; Beckschulte, Paula; Monteiro, Cátia; Ruiz, Micaela Belen; Descôteaux, Raphaëlle; Armitage, Phoebe; Boström, Christoffer; Havermans, Charlotte; Kuliński, Karol; Bischof, Kai In-situ conditions of two macroalgae along an Arctic fjord gradient in August 2024 2026-07-17 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.995904 Investigator Sarina Niedzwiedz sarina@uni-bremen.de Earth Science Event label Species Station ID DATE/TIME LATITUDE LONGITUDE Replicates Maximum quantum yield of photosystem II Chlorophyll c2, per dry mass Fucoxanthin, per dry mass Violaxanthin, per dry mass Antheraxanthin, per dry mass Zeaxanthin, per dry mass Chlorophyll a, per dry mass beta-Carotene, per dry mass Violaxanthin + Antheraxanthin + Zeaxanthin, per dry mass (Violaxanthin + Antheraxanthin + Zeaxanthin)/Chlorophyll a ratio De-expoxidation state of xanthophyll cycle Pigments, accessory Pigments, accessory/Chlorophyll a ratio Nitrogen Carbon Carbon/Nitrogen ratio geoscientificInformation Arctic CN Fucus distichus Fv/Fm Multiple investigations Pigments Saccharina latissima Svalbard Woodfjorden_1 Woodfjorden_10 Woodfjorden_2 Woodfjorden_3 Woodfjorden_4 Woodfjorden_5 Woodfjorden_6 Woodfjorden_7 Woodfjorden_8 Portable Chlorophyll Flourometer, Heinz Walz GmbH, Effeltrich, Germany, PAM-2100 High performance liquid chromatography (HPLC), Chromaster systems; with autosampler (chilled) 5260; with DA-detector 5430; with column oven 5310, VWR-Hitachi International GmbH Elemental Analyser (EA), EuroVector S.P.A., Milano, Italy, Euro EA 3000 2024-08-20 2024-08-26 Complete 79.326202 79.70965 13.271302 14.228133 access rights needed CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 1712 data points text/tab-separated-values Niedzwiedz, Sarina (submitted): A glimpse into the future of Arctic fjords: Biological communities along environmental gradients. Niedzwiedz, Sarina; Murray, Ayla; Beckschulte, Paula; Monteiro, Cátia; Ruiz, Micaela Belen; Descôteaux, Raphaëlle; Armitage, Phoebe; Boström, Christoffer; Havermans, Charlotte; Kuliński, Karol; Bischof, Kai (2026): Environmental conditions along Woodfjorden, Svalbard in August 2024 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.995923

To investigate the response of Fucus distichus and Saccharina latissima to local environmental conditions along the Woodfjorden gradient in Svalbard, field sampling was conducted in August 2024. Specimens of both species were collected at ten sampling stations distributed along the fjord. The intertidal brown alga Fucus distichus was found at six of the ten stations and was collected by hand during low tide. Meristematic apical tips were cut for further analysis. The subtidal kelp Saccharina latissima was present at nine of the ten stations. At each station, sporophytes of similar size were collected from a water depth of 5 ± 2 m using a plant rake (Plant Rake 19.000, according to Sigurd Olsen, KC Denmark, Silkeborg, Denmark). Circular discs of meristematic tissue (2 cm²) were cut from the basal blade approximately 10 cm above the stipe for further analysis. The maximum quantum yield of photosystem II (Fv/Fm) was determined using a pulse-amplitude-modulated fluorometer (Portable Chlorophyll Fluorometer PAM-2100, Heinz Walz GmbH, Effeltrich, Germany) after 5 min of dark acclimation (n = 7–11 per station and species). Subsequently, all tissue samples were dried in silica gel, which was replaced regularly to ensure complete desiccation. Pigment composition was analyzed by high-performance liquid chromatography (HPLC; Chromaster® system with chilled autosampler 5260, DAD detector 5430, and column oven 5310; VWR-Hitachi International GmbH, Darmstadt, Germany) (n = 5 per station and species). Total carbon and total nitrogen contents were determined using an elemental analyzer (Euro EA 3000 Elemental Analyzer, EuroVector S.P.A., Milan, Italy) (n = 5 per station and species). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.995904"!

http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME https://doi.pangaea.de/10.1594/PANGAEA.995923 Environmental conditions along Woodfjorden, Svalbard in August 2024 https://en.wikipedia.org/wiki/Species Species DIF 9.4 2026-07-17 2026-08-08