Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Fredriksen Stein stein.fredriksen@ibv.uio.no Brand Markus Markus.Brand@awi.de https://www.awi.de/en/science/special-groups/scientific-diving.html 0000-0003-4768-1889 Fischer Philipp philipp.fischer@awi.de https://www.awi.de/en/science/special-groups/scientific-diving.html 0000-0002-3357-5420 Karsten Ulf ulf.karsten@uni-rostock.de 0000-0002-2955-0757 Bischof Kai kai.bischof@uni-bremen.de 0000-0002-4497-1920 Savoie Amanda asavoie@nature.ca Bartsch Inka inka.bartsch@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/inka-bartsch.html 0000-0001-7609-2149 2026 Quantitative macroalgae survey and kelp morphometry data collected at Hansneset, Kongsfjorden, Spitsbergen in 2021 dataset https://doi.org/10.1594/PANGAEA.963565 2026-01-05T08:26:16 Surveys were performed for macroalgae fresh biomass, dry biomass, leaf area index and kelp morphometry at Hansneset, Blomstrand in Kongsfjorden, Svalbard, from the infralittoral fringe down to 15 m depth in June - August 2021. This dataset is part of a time series currently spanning over 25 years and complements the studies conducted in 1996/98 (Hop et al., 2012, doi:10.1515/bot-2012-0097) and 2012-14 (Bartsch et al., 2016, doi:10.1007/s00300-015-1870-1). The aim was to document changes in Arctic kelp forests dynamics in an Arctic fjord system influenced by glacial melt by repeatedly sampling the same site in a standardized manner. As ocean temperatures in the Arctic have risen substantially and underwater light climate continuously deteriorated over this time period, alterations were observed in the seaweed community, especially kelps as major coastal foundation species. The data file contains a range of standard morphometric measurements of individual kelps (and associated seaweeds) by depth, quadrat (replicate), and species. The taxonomic 'Class' of the species is provided, as well as a 'Category' that shows if the species is a kelp, or was found in the understory of the kelp forest. Within the species column there is a 'Digitate kelps' value. This is due to the complication of the visual similarity of Laminaria digitata and Hedophyllum nigripes. Because these are field data, and the distinction between these species requires genetic lab work, the exact species identification is not possible here. Historically these kelps were considered Laminaria digitata. In some rare cases, the leaf area and/or Total FW and Total DW were measured together for multiple specimens (especially juveniles together with others). When this was done, a comment can be found for that row of data. Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Fredriksen Stein stein.fredriksen@ibv.uio.no Brand Markus Markus.Brand@awi.de https://www.awi.de/en/science/special-groups/scientific-diving.html 0000-0003-4768-1889 Fischer Philipp philipp.fischer@awi.de https://www.awi.de/en/science/special-groups/scientific-diving.html 0000-0002-3357-5420 Karsten Ulf ulf.karsten@uni-rostock.de 0000-0002-2955-0757 Bischof Kai kai.bischof@uni-bremen.de 0000-0002-4497-1920 Savoie Amanda asavoie@nature.ca Bartsch Inka inka.bartsch@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/inka-bartsch.html 0000-0001-7609-2149 2024 Kelp forest community structure and demography in Kongsfjorden (Svalbard) across 25 years of Arctic warming journal article Ecology and Evolution 14(6) https://doi.org/10.1002/ece3.11606 e11606 Bartsch Inka inka.bartsch@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/inka-bartsch.html 0000-0001-7609-2149 Paar Martin martin.paar@uni-greifswald.de Fredriksen Stein stein.fredriksen@ibv.uio.no Schwanitz Max max.schwanitz@awi.de Daniel Claudia claudia.daniel@awi.de Hop Haakon haakon.hop@npolar.no Wiencke Christian christian.wiencke@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/christian-wiencke.html 2016 Changes in kelp forest biomass and depth distribution in Kongsfjorden, Svalbard, between 1996–1998 and 2012–2014 reflect Arctic warming journal article Polar Biology https://doi.org/10.1007/s00300-015-1870-1 16 pp Hop Haakon haakon.hop@npolar.no Wiencke Christian christian.wiencke@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/christian-wiencke.html Vögele Barbara Kovaltchouk Nikolaj A 2012 Species composition, zonation, and biomass of marine benthic macroalgae in Kongsfjorden, Svalbard journal article Botanica Marina 55(4) https://doi.org/10.1515/bot-2012-0097 399-414 11.9872 11.9872 78.9958 78.9958 11.9872 78.9958 2021-06-25T00:00:00 2021-07-15T00:00:00 0.0 15.0 point FACE-IT Arctic Biodiversity & Livelihoods https://www.face-it-project.eu/ MARUM - Center for Marine Environmental Sciences, University Bremen MARUM http://www.marum.de/ https://ror.org/04ers2y35 Hansneset_KELP_2021 78.9958 11.9872 Observation OBSE Observation between June - August 2021 7807 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ DATE/TIME Date/Time http://en.wikipedia.org/wiki/ISO_8601 Time T http://dbpedia.org/resource/Time Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Date/Time DEPTH, water Depth water m depth http://purl.obolibrary.org/obo/PATO_0001595 water http://purl.obolibrary.org/obo/CHEBI_15377 Length L http://dbpedia.org/resource/Length Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Depth water [m] Replicate Repl Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Repl Size Size size http://purl.obolibrary.org/obo/PATO_0000117 Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Quadrat size [cm] Size Category Cat Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Cat Class Class Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Class Species Species https://en.wikipedia.org/wiki/Species species Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Species Species, unique identification Species UID species Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Species UID Individuals Ind # Abundance or Count Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Ind [#] Individual association Ind assoc Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Ind assoc Stipe length Stipe l cm Length L http://dbpedia.org/resource/Length Ruler tape Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Stipe l [cm] Blade length Blade l cm Length L http://dbpedia.org/resource/Length Ruler tape Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Blade l [cm] Blade width Blade w cm Length L http://dbpedia.org/resource/Length Ruler tape Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Blade w [cm] Leaf area LA cm**2 Area http://dbpedia.org/resource/Area Digital camera, Canon, EOS 600D; followed by image analysis software, Schneider et al. 2012, ImageJ Version 2.1.0 Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 LA [cm**2] Stipe biomass, wet mass Stipe biom wm g wet mass Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Stipe biom wm [g] Stipe biomass, dry mass Stipe biom dm g dry mass https://en.wikipedia.org/wiki/Dry_matter Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Stipe biom dm [g] Holdfast biomass, wet mass Holdfast biom wm g wet mass Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Holdfast biom wm [g] Holdfast biomass, dry mass Holdfast biom dm g dry mass https://en.wikipedia.org/wiki/Dry_matter Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Holdfast biom dm [g] Blade biomass, wet mass Blade biom wm g wet mass Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Blade biom wm [g] Blade biomass, dry mass Blade biom dm g dry mass https://en.wikipedia.org/wiki/Dry_matter Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Blade biom dm [g] Sporophyll biomass, wet mass Sporophyll biom wm g wet mass Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Sporophyll biom wm [g] Sporophyll biomass, dry mass Sporophyll biom dm g dry mass https://en.wikipedia.org/wiki/Dry_matter Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Sporophyll biom dm [g] Biomass, wet mass Biom wm g biomass wet mass Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Biom wm [g] Biomass, dry mass Biom dm g biomass dry mass https://en.wikipedia.org/wiki/Dry_matter Mass M http://dbpedia.org/resource/Mass Scale, Mettler Toledo, PB3002-S/FACT Delta Range Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Biom dm [g] Stipe age Stipe age a Time T http://dbpedia.org/resource/Time According to Parke (1948) https://doi.org/10.1017/S0025315400056071 Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Adult stipe age Stipe age [a] Comment Comment Düsedau Luisa luisa.duesedau@awi.de 0000-0002-2750-6437 Comment CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable Biomass Depth transect kelp forest leaf area index (LAI) Svalbard GFBio NFDI4BioDiversity author102109 author102110 author10394 author10413 author20021 author22013 author26339 author40585 author42250 author48687 author58364 author58365 author58366 author58367 author58368 curlevel30 event3090860 geocode1599 geocode1600 geocode1601 geocode1619 inst277 journal13028 journal16724 journal2501 license21 method11379 method16185 method16186 method16187 method5024 param129269 param143728 param1570 param180507 param25420 param45620 param45621 param50932 param510679 param518732 param523296 param524576 param524577 param524578 param524579 param524580 param524581 param524582 param524583 param524584 param524585 param7053 param92420 param96164 pi102109 project4774 ref122483 ref81657 ref81658 term1073131 term1073204 term233 term2606205 term38563 term38564 term40594 term43770 term43863 term43892 term43975 term44025 term47880 term48046 term48089 term49384 term54505 term73136 term73138 topotype2