Blue Ecosystems יעוץ סביבתי, בהנהלת ד"ר רחלי עינב - Ceramium Roth

 

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דף הבית >> Seaweeds of Eastern Mediterranean coast >> Rhodophyta >> Ceramium Roth
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Rhodophyta | Chlorophyta | Rhodophyta
Ceramium Roth 1797






Taxonomy
Rhodophyta, Order: Ceramiales; Family: Ceramiaceae.
Etymology
The genus name derives from Greek for ‘small tube’ or ‘vase’.
Description
The Ceramium resembles a bush made of filaments.  Microscopic examination reveals an elongated, multi-jointed  thallus. The joints are thick and comprise a ring of smaller  cells. The reproductive organs are dark and hidden inside  the joints. The branching is dichotomous, and at the end of  each branch, a pair of bent, pincer-like branches face each  other.
Size
A tiny alga, its branches grow only a few centimeters in  length.
Colour
The algal is mostly transparent. Hints of red tending towards  brown appear in the joints.
Special features
The Ceramium resembles the Centroceras clavulatum, and  the two are easily confused. However, the Ceramium is  rarer, thicker, softer when touched and lighter.
Habitat
The alga grows upon rocks and as an epiphyte upon other  plants. It is usually found on the sea-facing edges of the  abrasion platform and on rocks in the water.
Biology and reproduction
The Ceramium has a three-stage life cycle. It is a favourite  dish for algae-eating fish and other herbivores, and this is  probably the reason for its scarcity in areas exposed to fish.
Seasonality and distribution
The genus is quite common in most seas. In Israel, it can be  found year-round, although a rise in population is seen in  the warmer months.
Additional species
The genus includes dozens of species found worldwide. In  this region, about 16 species have so far been identified. A  partial list of these includes species classified in the  Mediterranean on different occasions:
Ceramium bertholdii Funk  
Ceramium ciliatum (Ellis) Ducluzeau  
Ceramium cimbricum H. Petersen  
Ceramium circinatum K.tzing  
Ceramium codii (Richards) G. Feldmann-Mazoyer  
Ceramium comptum B.rgesen  
Ceramium deslongchampii Chauvin and Duby  
Ceramium diaphanum (Lightfoot) Roth  
Ceramium echionotum J. Agardh  
Ceramium fastigiatum Harvey  
Ceramium flaccidum (Harvey and K.tzing) Ardissone  
Ceramium gracillimum (K.tzing) Griffiths and Harvey  
Ceramium nodulosum (Lightfoot) Ducluzeau  
Ceramium rubrum (Hudson) C. Agardh  
Ceramium strictum Gr.ville and Harvey
Ceramium - micrscopic structure of  
Ceramium tenuissimum (Roth) Areschough. the thallus.
Ceramium - a condensed, bracelet-like joint
 
Ceramium species have been used along Pacific shores to cure lung diseases and for the manufacture of cosmetics. One species, Ceramium rubrum, possibly present in the Eastern Mediterranean, contains antibiotic substances that arrest the growth of bacteria.
 

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