Avtor/Urednik		Mazej, Zdenka; Epšek, Mateja
Naslov		The macrophytes of lake Velenjsko jezero, Slovenia - the succession of macrophytes after restoration of the lake
Prevedeni naslov		Makrofiti Velenjskega jezera, Slovenija - sukcesija makrofitiov po restavraciji jezera
Tip		članek
Vir		Acta Biol Slov
Vol. in št.		Letnik 48, št. 1
Leto izdaje		2005
Obseg		str. 21-31
Jezik		eng
Abstrakt		The macrophyte vegetation in the artificial lake Velenjsko jezero has been monitored since 1996. The pH of the lake was around 12 up to 1994, when it was remediated. After that macrophytes started to colonize a large proportion of the littoral very quickly. The pioneer species, which appeared in the first survey year (1996), were Chara sp., Nuphar lutea, Potamogeton crispus and Myriophyllum spicatum. Potamogeton crispus was the dominant species till 1997. In the following years Najas marina and Potamogeton filiformis prevailed over other species in the lake. Since the beginning of the colonization, the species composition had become more heterogeneous and the quantitative relationships between the species varied enormously. In the year 2004, 9 species were detected in the lake. While species Najas marina, Potamogeton filiformis, Potamogeton lucens, Potamogeton nodosus show positive development progress, in the last years minor appearance of Chara sp., Potamogeton crispus and Najas minor was observed.
Izvleček		Makrofite v umetno nastalem Velenjskem jezeru spremljamo od leta 1996. Vrednost pH jezerske vode je bila vse do leta 1994, ko so v Termoelektrarni Šoštanj uvedli zaprti krog transportne vode, okoli 12. Vrednost pH je po tem ukrepu hitro padla na vrednost okoli 8. Makrofiti so postopoma pričeli naseljevati litoralno območje jezera. Pionirske vrste v letu 1996 so bile Chara sp., Nuphar lutea, in Potamogeton crispus. Potamogeton crispus je bila dominantna vrsta vse do leta 1997. V naslednjih letih sta prevladali vrsti Najas marina in Potamogeton filiformis. Od začetka naseljevanja je prihajalo do velikih kvalitativnih in kvantitativnih sprememb v vrstni sestavi in razporeditvi makrofitov. V jezeru je leta 2004 uspevalo 9 vrst. Medtem ko kažejo vrste Najas marina, Potamogeton filiformis, Potamogeton lucens in Potamogeton nodosus pozitiven trend v razvoju, pa v zadnjih letih opažamo manjše pojavljanje vrst Chara sp., Potamogeton crispus in Najas minor.
Deskriptorji		FRESH WATER ECOSYSTEM PLANTS TEMPERATURE HYDROGEN-ION CONCENTRATION