Epiphytic diatom community and calcium carbonate crystals characteristics on the surface of freshwater Ulva thalli
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Date
2012
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Abstract
On the surface of the freshwater form of Ulva thalli the incrustations process takes
place which resulted in the precipitate of calcium carbonate crystals (CaCO3
). At the same time,
this area is also inhabited by large numbers of periphytic communities, mainly by diatoms.
Siliceous frustules and calcite crystals are responsible for the thalli roughness in all stages of its
growth. Diatom communities colonizing young, thin thallus of Ulva were dominated by Cocconeis
placentula and Melosira varians, and mature thalli by Cocconeis placentula and Navicula
cryptocephala. The obtained data show that the surface roughness of thalli depends on the
participation of calcium carbonate in the dry matter of Ulva and diatoms content does not change
significantly with age of the macroalga thallus.
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Keywords
thalli surface, macroalgae, Ulva, periphyton, Calcium carbonate, roughness
Citation
Messyasz B., Pikosz M., Rybak A., Łepkowska K. 2012. Epiphytic diatom community and calcium carbonate crystals characteristics on the surface of freshwater Ulva thalli. Teka Kom. Kszt. Środ. Przyr. - OL PAN, 9: 96-106
Seria
TEKA Komisji Ochrony i Kształtowania Środowiska Przyrodniczego;IX/2012