title: Influence of barley straw (Hordeum vulgareL.) extract on phytoplankton dominated byScenedesmusspecies in laboratory conditions: the importance of the extraction duration.
abstract: The response of a natural phytoplankton assemblage dominated by algae of the genusScenedesmusto the addition of barley straw extract was studied in a laboratory experiment. The aim of the study was to compare the inhibiting effect of water extracts obtained by soaking the straw for 1, 2 and 3 months. We analysed the response of four species,Scenedesmus subspicatus,Scenedesmus ecornis,Scenedesmus quadricaudaandScenedesmus acuminatus, during 14 days of their exposure to different types of barley straw extract.S. subspicatusandS. ecornisresponded with decreasing numbers only to the addition of the 3-month solution (ANOVA;F= 290.1,p<0.001; andF= 11.8,p<0.01, respectively); the two other species were inhibited by all types of extracts. The results indicate the need for more research on the importance of extraction duration to the inhibitory abilities of barley straw which can be applied in the management of water quality in water bodies.
authors.affiliation: Department of Hydrobiology, University of Life Sciences, ul. Dobrzańskiego 37, 20-062 Lublin, Poland.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Pęczuła
keywords: Barley straw; Extract; Phytoplankton; Scenedesmus