PL
Opisano niewielką populację kłoci wiechowatej Cladium mariscus (L.) Pohl znalezioną w piaskowni w Dąbrowie Górniczej. Przeanalizowano wymagania, rozmieszczenie oraz sytuację gatunku. Stanowisko znajduje się poza zwartym zasięgiem kłoci w Polsce i jest jednym z najbardziej południowych. Płat szuwaru kłociowego Cladietum marisci (Allorge 1922) Zobrist 1935 odkryto na terenie o wyjątkowych walorach przyrodniczych, niespotykanych poza obszarami pojezierzy
EN
Cladium mariscus (L.) Pohl is a protected, relic species of Polish flora, threatened with extinction by reason of lake eutrophication and wetlands drainage. The species disappeared from half (of 211 known) localities over the last 40 years. Its distribution in Poland is confined especially to the young, postglacial landscape of northern lakelands and to small, isolated territory around Chełm in SE. New locality of C. mariscus has been found in Dąbrowa Górnicza (Silesia–Cracow Upland), in area of old sand-pit. Discovered locality is one of southernmost localities in Poland and one of few between northern Poland continuous range and localities at Great Hungarian Plain. Great Fen-sedge population grows in small patch of Cladietum marisci (All. 1922) Zobr. 1935. High lime potential is nourished by calcium-rich groundwater. Numerous endangered and protected species of rich fens grow in neighbouring communities, e.g. Helodium blandowii, Liparis loeselii, Epipactis palustris, Malaxis monophyllos, Dactylorhiza maculata, Pinguicula vulgaris bicolor, Eleocharis quinqueflora, Tofieldia calyculata. A new locality of C. mariscus is threatened with settlement expansion, natural forest succession and, especially dewatering melioration, noted in February 2010