Düsedau, Luisa; Fredriksen, Stein; Brand, Markus; Fischer, Philipp; Karsten, Ulf; Bischof, Kai; Savoie, Amanda; Bartsch, Inka: Quantitative macroalgae survey and kelp morphometry data collected at Hansneset, Kongsfjorden, Spitsbergen in 2021 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.963565 (dataset in review)
Abstract:
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.
Supplement to:
Düsedau, Luisa; Fredriksen, Stein; Brand, Markus; Fischer, Philipp; Karsten, Ulf; Bischof, Kai; Savoie, Amanda; Bartsch, Inka (2024): Kelp forest community structure and demography in Kongsfjorden (Svalbard) across 25 years of Arctic warming. Ecology and Evolution, 14(6), e11606, https://doi.org/10.1002/ece3.11606
References:
Bartsch, Inka; Paar, Martin; Fredriksen, Stein; Schwanitz, Max; Daniel, Claudia; Hop, Haakon; Wiencke, Christian (2016): Changes in kelp forest biomass and depth distribution in Kongsfjorden, Svalbard, between 1996–1998 and 2012–2014 reflect Arctic warming. Polar Biology, 16 pp, https://doi.org/10.1007/s00300-015-1870-1
Hop, Haakon; Wiencke, Christian; Vögele, Barbara; Kovaltchouk, Nikolaj A (2012): Species composition, zonation, and biomass of marine benthic macroalgae in Kongsfjorden, Svalbard. Botanica Marina, 55(4), 399-414, https://doi.org/10.1515/bot-2012-0097
Project(s):
Arctic Biodiversity & Livelihoods (FACE-IT)
Coverage:
Latitude: 78.995800 * Longitude: 11.987200
Date/Time Start: 2021-06-25T00:00:00 * Date/Time End: 2021-07-15T00:00:00
Minimum DEPTH, water: 0.0 m * Maximum DEPTH, water: 15.0 m
Event(s):
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | DATE/TIME | Date/Time | Düsedau, Luisa | Geocode | ||
2 | DEPTH, water | Depth water | m | Düsedau, Luisa | Geocode | |
3 | Replicate | Repl | Düsedau, Luisa | |||
4 | Size | Size | Düsedau, Luisa | Quadrat size [cm] | ||
5 | Category | Cat | Düsedau, Luisa | |||
6 | Class | Class | Düsedau, Luisa | |||
7 | Species | Species | Düsedau, Luisa | |||
8 | Species, unique identification | Species UID | Düsedau, Luisa | |||
9 | Species, unique identification (Semantic URI) | Species UID (Semantic URI) | Düsedau, Luisa | |||
10 | Species, unique identification (URI) | Species UID (URI) | Düsedau, Luisa | |||
11 | Individuals | Ind | # | Düsedau, Luisa | ||
12 | Individual association | Ind assoc | Düsedau, Luisa | |||
13 | Stipe length | Stipe l | cm | Düsedau, Luisa | Ruler tape | |
14 | Blade length | Blade l | cm | Düsedau, Luisa | Ruler tape | |
15 | Blade width | Blade w | cm | Düsedau, Luisa | Ruler tape | |
16 | Leaf area | LA | cm2 | Düsedau, Luisa | Digital camera, Canon, EOS 600D; followed by image analysis software, Schneider et al. 2012, ImageJ Version 2.1.0 | |
17 | Stipe biomass, wet mass | Stipe biom wm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
18 | Stipe biomass, dry mass | Stipe biom dm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
19 | Holdfast biomass, wet mass | Holdfast biom wm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
20 | Holdfast biomass, dry mass | Holdfast biom dm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
21 | Blade biomass, wet mass | Blade biom wm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
22 | Blade biomass, dry mass | Blade biom dm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
23 | Sporophyll biomass, wet mass | Sporophyll biom wm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
24 | Sporophyll biomass, dry mass | Sporophyll biom dm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
25 | Biomass, wet mass | Biom wm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
26 | Biomass, dry mass | Biom dm | g | Düsedau, Luisa | Scale, Mettler Toledo, PB3002-S/FACT Delta Range | |
27 | Stipe age | Stipe age | a | Düsedau, Luisa | According to Parke (1948) | Adult stipe age |
28 | Comment | Comment | Düsedau, Luisa |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
7807 data points
Download Data (login required; moratorium until 2025-11-20)
View dataset as HTML (shows only first 2000 rows)