Pehlke, Constanze; Bartsch, Inka (2023): Algal information along a transect at the island of Helgoland in 2005 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962216, In: Pehlke, C; Bartsch, I (2023): Depth distribution and biomass of sublittoral seaweeds at the island of Helgoland in 2005 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.962211
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Abstract:
A sublittoral transect (P3) in the North of Helgoland that had been investigated ~40 years earlier by Lüning (1970) was traversed again. Scuba dives were carried out between 13.07.2005 and 25.08.2005. For each sampling point, time, date and coordinates were given as well as the depth in m mean low water spring tide. 0.25 m² frames were used to obtain the species composition, total fresh mass and total dry mass. In addition, 1 m² frames were used to record the kelp community by counting the individuals and measuring kelp stipe length, kelp blade area, kelp blade fresh mass, kelp age and fresh mass of epiphytes on the kelp stipes. Equal Location IDs represent the same frame.
Keyword(s):
Related to:
Gehling, Constanze (2006): Qualitative und quantitative Analyse des Laminarienwaldes vor Helgoland - ein Vergleich zu 1970. University of Bremen, Bremen, Germany, Gehling_2006.pdf
Lüning, K (1970): Tauchuntersuchungen zur Vertikalverteilung der sublitoralen
Helgoländer Algenvegetation. 21(3), 271-291, https://doi.org/10.1007/BF01609062
Pehlke, Constanze; Bartsch, Inka (2008): Changes in depth distribution and biomass of sublittoral seaweeds at Helgoland (North Sea) between 1970 and 2005. Climate Research, 37, 135-147, https://doi.org/10.3354/cr00767
Coverage:
Median Latitude: 54.194679 * Median Longitude: 7.860892 * South-bound Latitude: 54.191067 * West-bound Longitude: 7.856483 * North-bound Latitude: 54.198050 * East-bound Longitude: 7.865783
Minimum DEPTH, water: 0.5 m * Maximum DEPTH, water: 10.0 m
Comment:
Gehling (2006) figure 3 shows the sampling location as green lines. The Loc ID is the frame no. In frame 1, 10 species were found and weight was taken. In frame 4, 13 species were found. Weight was taken from all species and in addition, stipe and blade weight of L. hyperborea was measured as well as single weights from each individual called Individual code: 1-18, as there where 18 L. hyperborea.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Date | Date | Pehlke, Constanze | |||
| 2 | Location ID | Loc ID | Pehlke, Constanze | Quadrat | ||
| 3 | LATITUDE | Latitude | Pehlke, Constanze | Geocode | ||
| 4 | LONGITUDE | Longitude | Pehlke, Constanze | Geocode | ||
| 5 | DEPTH, water | Depth water | m | Pehlke, Constanze | Geocode | |
| 6 | Species | Species | Pehlke, Constanze | |||
| 7 | Individual code | Individual code | Pehlke, Constanze | all: all individuals, ID: ID for each kelp, all stipes: mass of all stipes, all blades: mass of all blades | ||
| 8 | Wet mass | Wet m | g | Pehlke, Constanze | Fresh mass for all individuals of the respective species; 0.01 for species that were to light to be weightend | |
| 9 | Dry mass | Dry m | g | Pehlke, Constanze | ||
| 10 | Stipe length | Stipe l | cm | Pehlke, Constanze | of each kelp individual | |
| 11 | Blade area | Blade area | cm2 | Pehlke, Constanze | of each kelp individual | |
| 12 | Blade biomass, wet mass | Blade biom wm | g | Pehlke, Constanze | of each kelp individual; 0.01 for species that were to light to be weightend | |
| 13 | Age | Age | a | Pehlke, Constanze | of kelp | |
| 14 | Stipe epiphytes biomass, wet mass | Stipe epiph biom wm | g | Pehlke, Constanze | of each kelp individual; 0.01 for species that were to light to be weightend | |
| 15 | Size | Size | m2 | Pehlke, Constanze | of quadrat | |
| 16 | Comment | Comment | Pehlke, Constanze |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
5263 data points
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