Diversity of desmids in three Thai peat swamps

Abstract

Three peat swamps situated in the southern part of Thailand were investigated for their desmid flora in relation to a number of physical and chemical habitat parameters. Altogether, 99 species were encountered belonging to 22 genera. 30 species are new records for the Thai desmid flora. Laempagarung peat swamp showed the highest diversity (45 species), followed by Maikhao peat swamp (32 species) and Jud peat swamp (25 species). Despite its relatively low species richness, Jud swamp appeared to house a number of rare taxa, e.g., Micrasterias subdenticulata var. ornata, M. suboblonga var. tecta and M. tetraptera var. siamensis which can be considered Indo-Malaysian endemics. Differences in composition of the desmid flora between the three peat swamps are discussed in relation to environmental conditions.

Morphology, taxonomy, biogeography and ecology of Micrasterias foliacea Bailey ex Ralfs (Desmidiales, Zygnematophyceae)

“…Shallow water was often dominated by species of Nymphaea and Utricularia ( Schumacher 1956 ; Thomasson 1966 ; Ratnasabapathy and Kumano 1974 ; Turner 1892 ; González 2009 ). Other dominant species include those of Pistia and Salvinia ( Ngearnpat et al 2008 ; González 2009 ). In deeper waters Brasenia schreberi , Cabomba caroliniana , Nuphar orbiculata , Nymphaea odorata and Utricularia purpurea were common ( Schumacher 1956 ).…”

Knowledge to Ecological Preferences in a Tropical Epiphytic Algae to Use with Eutrophication Indicators

“…E sinuosum were optimal in surface water, with low transparency, intermediate oxygen concentration, pH circunneutral, high conductivity (50 to 200 µS/cm) and low concentration of SST and STD. This species increases its abundance in high waters [24] and inhabits swamp systems with hotter than 29˚C in mesotrophic environments [25].…”