Citation:

PANGAEA.963565 (dataset in review)

Name: Quantitative macroalgae survey and kelp morphometry data collected at Hansneset, Kongsfjorden, Spitsbergen in 2021
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Biomass; Depth transect; kelp forest; leaf area index (LAI); Svalbard

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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.

Keyword(s):

Biomass; Depth transect; kelp forest; leaf area index (LAI); Svalbard

Supplement to:

Düsedau, Luisa; Fredriksen, Stein; Brand, Markus; Fischer, Philipp; Karsten, Ulf; Bischof, Kai; Savoie, Amanda; Bartsch, Inka (in prep.): Arctic kelp forest decline - a consequence of melting glaciers? Ecology and Evolution

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):

Hansneset_KELP_2021 * Latitude: 78.995800 * Longitude: 11.987200 * Method/Device: Observation (OBSE) * Comment: Observation between June - August 2021

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

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