Effect of large- and of small-bodied zooplankton on phytoplankton in a eutrophic oxbow |
| |
Authors: | Grigorszky Istvaan; Nagy Saandor; Tooth Albert; Maathee Csaba; Muuller Zoltaan; Borbeely Gyoorgy |
| |
Institution: | Department of Botany, PO Box 14, L. Kossuth University H-4010 Debrecen, Hungary
1Department of Ecology, PO Box 71, L. Kossuth University H-4010 Debrecen, Hungary |
| |
Abstract: | Macrozooplankton and microzooplankton effects on the phytoplanktonwere measured in situ in a eutrophic lake. Indigenous phytoplanktonwere incubated for 5 days in 301 mesocosms with either the macro-and microzooplankton (complete), microzooplankton only (micro)or no zooplankton (none). Changes in phytoplankton biovolumewere investigated. Rotifer densities became significantly higherin the micro treatment than in the completeand none treatments. Total algal biovolume changedlittle in the complete and nonetreatments, but increased significantly in the microtreatment. The results suggest that macrozooplankton (Daphniamagna) suppressed it and microzooplankton (Keratella cochlearis)enhanced it. They had opposite net effects on the phytoplankton.Suppression of microzooplankton by Daphnia probably had an indirectnegative effect on the phytoplankton. |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|