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Water temperature and chemistry ranges based on 1 sample.
Depth range (m): 0 - 3.5
Temperature range (°C): 11.845 - 11.845
Nitrate (umol/L): 5.063 - 5.063
Salinity (PPS): 35.203 - 35.203
Oxygen (ml/l): 6.138 - 6.138
Phosphate (umol/l): 0.336 - 0.336
Silicate (umol/l): 2.448 - 2.448
Depth range (m): 0 - 3.5
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Cystoseira baccata is a species of brown seaweed in the family Fucaceae. It is found in the north east Atlantic, the Baltic Sea and the Mediterranean Sea. The species name baccata means "berry-like" and refers to the small air bladders.
This species was known as Cystoseira fibrosa until 1950, when P.C.Silva pointed out that it had first been described in 1768 by S.G.Gmelin, who had found the lectotype in the Netherlands and called it Fucus baccatus. His original material cannot now be found but his illustration serves to identify the species.
C. baccata is a tough, leathery seaweed of a yellowish or brownish colour. It is a perennial, each year growing new branches up to 50 cm long from a dark brown, cone-shaped base. The main axis is flattened and has a cross section of 1 cm x 0.5 cm. The side branches are alternate and cylindrical, being arranged in a pinnate fashion. The smallest branches are fine and wiry. There are small, lemon-shaped aerocysts or air bladders on the smaller branches. Usually these are single but sometimes there are several in a chain. When the lateral branches are shed in the winter, the base of the main axis can be seen to have a zigzag shape caused by the deciduous primary laterals. The receptacles are terminal, up to 5 cm long, cylindrical with knot-like swellings and covered with tiny threads. In the spring when new lateral shoots grow there are few if any aerocysts. By the autumn they are more numerous and noticeable.
Distribution and habitat
C. baccata occurs from the Baltic Sea south to the Mediterranean Sea, the Canary Islands, Mauritania and Western Sahara. It is commonest in France and Spain, and in the British Isles it is mostly found in the Channel Islands, the south coast of England and the west coast of Ireland. It is usually found on the lower shore and the sublittoral zone attached to rocks or higher up the shore in deep pools with sandy bases.
The conceptacles of C. baccata are specialised reproductive cavities and form in the receptacles which are fertile from June until the autumn. Inside the conceptacles are antheridial hairs on which the antheridia or male gametes develop. About forty oospheres or female gametes also develop in each conceptacle. The antheridia are liberated first through a pore called the ostiole and accumulate around it in an orange mound. The ripe oospheres are then liberated and are fertilised externally. They become more rounded and sink to the sea floor where segmentation starts within a few hours. Four primary rhizoids develop from each and the lateral branches soon begin to grow.
- Cystoseira baccata (S.G.Gmelin) P.C.Silva, 1952 World Register of Marine Species. Retrieved 2011-09-18.
- Studies on marine algae of the British Isles. 4. Cystoseira baccata (Gmelin) Silva Retrieved 2011-09-18.
- Cystoseira baccata (S.G. Gmelin) P.C. Silva The Seaweed Site. Retrieved 2011-09-18.
- Cystoseira baccata (S.G.Gmelin) P.C.Silva AlgaeBase. Retrieved 2011-09-18.