Zuo Shengpeng, Wan Kun, Ma Sumin
a College of Environmental Science and Engineering, Anhui Normal University , Wuhu 241003 , People's Republic of China.
Environ Technol. 2015 Jan-Feb;36(1-4):54-9. doi: 10.1080/09593330.2014.936520. Epub 2014 Jul 10.
The present study evaluated the combined effects of four typical predatory zooplankton and allelopathic aquatic macrophytes on algal control in a microcosm system. It would determine the effects of diverse species and biological restoration on the growth of harmful water-bloom microalgae in great lakes polluted by excess nutrients. It was found that the mixtures of each zooplankton and the floating plant Nymphoides peltatum had stronger inhibitory effects on harmful water-bloom microalgae than the individual species in clean or eutrophic water bodies. In addition, a community of four zooplankton types had a synergistic effect on algal inhibition. Algal suppression by the zooplankton community was enhanced significantly when the macrophyte was co-cultured in the microcosm. Furthermore, Chlorella pyrenoidosa was more susceptible than Microcystis aeruginosa when exposed to grazing by zooplankton and the allelopathic potential of the macrophyte. Algal inhibition was also weaker in eutrophic conditions compared with the control. These findings indicate that diverse species may enhance algal inhibition. Therefore, it is necessary to restore biological diversity and rebuild an ecologically balanced food chain or web to facilitate the control of harmful algal blooms in eutrophic lakes.
本研究评估了四种典型的捕食性浮游动物和化感水生植物在微观系统中对藻类控制的综合影响。它将确定不同物种和生物修复对营养过剩污染的大湖中有害水华微藻生长的影响。研究发现，在清洁或富营养水体中，每种浮游动物与漂浮植物荇菜的混合物对有害水华微藻的抑制作用比单一物种更强。此外，四种浮游动物类型的群落对藻类抑制具有协同作用。当大型植物在微观系统中共同培养时，浮游动物群落对藻类的抑制作用显著增强。此外，与铜绿微囊藻相比，蛋白核小球藻在受到浮游动物捕食和大型植物化感潜力影响时更易受到影响。与对照相比，富营养条件下的藻类抑制作用也较弱。这些发现表明，不同物种可能增强藻类抑制作用。因此，有必要恢复生物多样性并重建生态平衡的食物链或食物网，以促进对富营养化湖泊中有害藻华的控制。
