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Occurrence and cover of algae along a transect at the island of Helgoland in 2005

Description: 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 21.04.2005 and 23.06.2005. At different sampling points (Location ID: P1-P44; start with P1 every new day) along the transect, substrate and topography was recorded and every 5m occurrence and the cover was obtained of the dominant brown algae Fucus serratus, Sargassum muticum, Laminaria digitata, L. hyperborea and Saccharina latissima. The occurrence was measured qualitatively as present/absence (1/0) and the cover was estimated semi-quantitative according to the Kautsky scale as 0 for not present to 100 as 100% cover (Kautsky, 1995). Furthermore, the transect was split into different zones (1-7) depending on the algal vegetation according to the master thesis of C. Gehling (2006). For each sampling point, time, date and coordinates were given as well as the corrected depth in m mean low water spring tide.

Global identifier:

Doi(
    "10.1594/PANGAEA.962213",
)

Types:
Measurements(
    Measurements {
        domain: Unspecified,
        station: None,
        measured_variables: [
            "DATE/TIME",
            "Number",
            "Location ID",
            "LATITUDE",
            "LONGITUDE",
            "DEPTH, water",
            "Substrate type",
            "Topography",
            "Sargassum muticum",
            "Sargassum muticum, cover",
            "Fucus serratus",
            "Fucus serratus, cover",
            "Laminaria digitata",
            "Laminaria digitata, cover",
            "Saccharina latissima",
            "Saccharina latissima, cover",
            "Laminaria hyperborea",
            "Laminaria hyperborea, cover",
            "Zone",
            "Comment",
        ],
        methods: [
            "Estimated according to Kautsky (1995)",
            "Estimated according to Kautsky (1995)",
            "Estimated according to Kautsky (1995)",
            "Estimated according to Kautsky (1995)",
            "Estimated according to Kautsky (1995)",
        ],
    },
)
Dataset

Comment: Gehling (2006) figure 3 shows the sampling location as black dots.

Origins: /Wissenschaft/PANGAEA

Tags: Vegetationszone ? Helgoland ? Japanischer Beerentang ? Geografische Koordinaten ? Topographie ? Insel ? Makroalgen ? Niedrigwasser ? Algen ? Wasser ? Abdeckung ? Biomasse ? Gezeiten ? Kelp ? algae community ? distribution ? fresh mass ? leaf area index (LAI) ? occurence ? relative frequency ?

Bounding boxes: 7.850816666666666° .. 7.868016666666666° x 54.18958333333333° .. 54.20218333333334°

License: cc-by/4.0

Language: Englisch/English

Organisations

Persons

Issued: 2023-11-28

Modified: 2023-11-28

Time ranges: 2005-04-21 - 2005-06-23

Resources

Status

Quality score

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