Common bladder wrack

Bladderwrack, Rockweed; scientific name: Fucus vesiculosus
Photo: UPB-Projektgruppe Trier

Common brown alga of the coastal areas of the North and Baltic Sea

Common bladder wrack (rockweed, or brown alga) is one of the macrophytic alga which have long been used in monitoring programmes as indicators of accumulation. As one of the most widespread algae in the northern hemisphere, it lends itself particularly well to the comparative analysis of coastal water pollution.

The forked thallus is used as a specimen. Sampling takes place every two months.

Richtlinie zur Probenahme und Probenbearbeitung Blasentang (Fucus vesiculosus) (German)

Sampling area

NP Vorpommersche Boddenlandschaft National Park in the largest brackish water (Bodden) habitat of the world.
BR/NP Wattenmeere National park in the world largest connected sand and mud flats.


Metals Eighty percent of all elements on earth are metals
Nonmetals Only eighteen elements in the periodic table
Per- and polyfluoroalkyl compounds Organic compounds which are fully (per-) or partially (poly-) fluorinated
Polycyclic musks Class of synthetic fragrances
Stable Isotopes Atoms of one element with different weights
Supplementary parameters Additional information for the interpretation of contamination data

Sampling period

1985 - 2013

Extended information

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