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This paper presents the results of a floristic study focusing on taxa representing the genus Gomphonema in Kobylanka stream, situated ca 30 km NW of Kraków. Species belonging to the genus Gomphonema Ehr. were very frequently observed diatom taxa in the material studied. Amongst 272 diatom taxa recorded in the studied material, 13 belong to this genus. Some of them are widespread and often found in...
Data concerning morphology, ecology and distribution of Polish representatives of the genus Xerula Maire are discussed in the paper. All available specimens of X. pudens and X. melanotricha from Polish herbaria were reexamined to verify their identity and geographical distribution. Several new localities of X. melanotricha in the country are provided. A key to European taxa of the genus is proposed.
Information on Potamogeton hybrids, their identification, taxonomy, ecology and distribution has not been sufficiently recognised yet. Based on characters of P. x salicifolius (= P. perfoliatus x P. lucens) from a new locality in Poland - the Gatno lake (the Kaszuby Lakeland in NW Poland) - general comments on Potamogeton hybrids identification are introduced. The description of P. x salicifolius...
This study aimed at evaluate the ecological states of four protected, mid-forest lakes located in mid-western Poland. Two means of evaluation were used and compared: biodiversity (expressed by phytocoe-notic diversity of macrohydrophyte vegetation) and habitat diversity (resulting from abiotic conditions and biota activity). The first method was based on the type and number of plant associations present...
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