title: Life history response of Daphnia magna to a mixotrophic golden alga, Poterioochromonas sp., at different food levels.
abstract: The toxicity of Poterioochromonas to Daphnia magna was investigated at different food (Scenedesmus acutus) levels. Poterioochromonas alone of 0.4-20 mg C L(-1) was not acutely toxic to D. magna, but did not support D. magna growth, either. When fed mixed diets (2 mg C L(-1) in total), D. magna's survival and reproduction were significantly depressed when Poterioochromonas comprised above 50%, likely due to the inhibition of food ingestion. Large juveniles were less sensitive to poor quality food than neonates. Therefore, Poterioochromonas may affect D. magna living to various extents depending on its concentration, age structure of D. magna populations and availability of other food.
authors.affiliation: Laboratory of Environmental Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, People's Republic of China. zhangxue01@gmail.com
authors.forename: Xue
authors.initials: X
authors.lastname: Zhang
authors.forename: Hong-Ying
authors.initials: HY
authors.lastname: Hu
authors.forename: Trine Perlt
authors.initials: TP
authors.lastname: Warming
authors.forename: Kirsten Seestern
authors.initials: KS
authors.lastname: Christoffersen
mesh_terms: D000818:Animals; D044523:Chrysophyta / Q000502:physiology*; D003621:Daphnia / Q000187:drug effects* / Q000254:growth & development*; D020387:Food Chain; D008018:Life Cycle Stages / Q000187:drug effects; D012098:Reproduction; D044444:Scenedesmus / Q000502:physiology; D018675:Toxicity Tests