Abstract
Five small water bodies located within the agricultural region of Wielkopolska (west Poland) underwent inves- tigation. Periphyton samples were collected from various macrophyte habitats representing rush vegetation (in five water bodies), submerged aquatic plants (in three) and nymphaeids (in one): Pal˛ edzie - Ceratophyllum demersum, Potamogeton crispus, Typha latifolia; Batorowo - Phragmites australis ;P iotrowo -Potamogeton natans, Ceratophyllum submersum, Ty- pha latifolia; Tarnowo Podgorne - Typha latifolia ;D ˛ - Zannichellia palustris, Potamogeton pectinatus, Phragmites australis. The main goal of the study was to determine the composition and abundance of the periphytic communities inhabiting various types of rush and water vegetation of five water bodies located within a mid-field landscape area. Diatoms such as Achnanthidium minutissimum, Amphora ovalis, Cocconeis placentula orNavicula cincta revealed signifi- cantly higher densities in the zone of elodeids, while green algae prevailed among nymphaeids. As a result of this study it was found that the epiphytic algae were characterised by much lower diversity in respect to a specific water body, though much greater diversity was observed in its relation to the type of substratum. Two types of habitats were distinguished - the first of simple build (helophytes and nympheids) and the second containing the complicated architecture of plant stems (elodeids).
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