The biochemical composition of some species of Phaeophyceae (Cystoseira):
Cystoseira compressa, Cystoseira barbata, Cystoseira elegans, Cystoseira amentacea,
Cystoseira barbatula, Cystoseira caespitosa, have been studied. The algal specimens have
been collected from Ibn Hani coast north of lattakia in spring 2014. The soluble sugar
varies between (13- 56.78%) weight/dry weight [w/dw]. C.amentacea has the highest
content of proteins (21.76%), and C.barbata has the lowest (9.51%). Lipid varied between
(1.25- 5.55%) [w/dw]. The highest content of ash was in C.caespitosa (31.18%), and the
lowest in C.amentacea (23.84%). Iodine was: C.compressa and C.caespitosa (0.68 %),
C.barbata (0.69 %), C.barbatula (0.7%), C.amentacea (0.71%), C.elegans (0.8%).
Mannitol was within the range (2.91-4%) [w/dw]. Results of biochemical composition of
studied species showed the differences between the percentage of values, and this variety
affects on the economical value for the species, also affects on the major herbivorous food,
that affects on their environment and their community composition.
