Distribution of diatoms and bryophytes on linear transects through spring fens
2004
The distribution of bryophytes and their diatom epiphytes was
studied in three acidic, mineral-poor spring fens in the
Western Carpathian flysch zone (Czech Republic, Slovak
Republic). Samples were taken along linear transects from the
permanently wet surrounding of streams to the dry Sphagnum -
and Polytrichum-hummocks. The height above the water table and
water content of each moss sample were measured. Moisture and
pH were found to be primary factors influencing moss and diatom
species distribution. Diatom abundance, species richness and
diversity decreases with the decreasing moisture in the
microsite. Eunotia paludosa was a typical species of dry
hummock tops, accompanied by Pinnularia rupestris and
Achnanthes lanceolata. Diatom-species-rich streams were
characterized by the occurrence of Eunotia arcus, E. incisa and
Pinnularia subcapitata. Significant relationships were found
between the occurrence of some mosses and diatom species
composition, independent from the measured moisture
characteristics.
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