Author/Editor		Urbanc-Berčič, Olga; Kržič, Nina; Rudolf, Mojca; Gaberščik, Alenka; Germ, Mateja
Title		The effect of water level fluctuations on macrophyte occurrence and abundance in the intermittent Lake Cerknica
Type		članek
Source		In: Vymazal J, editor. Natural and constructed wetlands - nutrients, metals and management. Leiden: Backhuys publishers,
Publication year		2005
Volume		str. 312-20
Language		eng
Abstract		In an intermittent Lake Cerknica, a three-year study was carried out to monitor the occurrence and abundanca of macrophytes at three locations. Different water regimes occurred in three subsequent vegetation periods; moderate floods in 2001, followed by a wet year, 2002 and an ettremely dry year, 2003. Four groups of plants were distinguished according to their phenotypic plasticity to water level fluctuations. The plants exhibiting amphibious character prevailed over truly aquatic species. The wet season was found to cause more disturbances to macrophyte communities than an extremely dry season. Variations in species composition and abundance were more conspicuous at the two locations in the main stream, Stržen, meandering through the lake, while at the third location with more extreme water level fluctuations, variations were Iess evident.
Descriptors		FRESH WATER PLANTS ECOSYSTEM