Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, College of Environmental Science and Engineering, Anhui Normal University, Wuhu, 241003, PR China.
Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, College of Environmental Science and Engineering, Anhui Normal University, Wuhu, 241003, PR China.
Ecotoxicol Environ Saf. 2019 Oct 30;182:109482. doi: 10.1016/j.ecoenv.2019.109482. Epub 2019 Jul 28.
In Chinese Lake Taihu, the algal quantity was significantly larger in summer than late spring (p < 0.01). In summer, compared with the dredged area including neither zoobenthos nor submerged macrophytes, the algal biomass and density were significantly lower in the area filled with the submerged macrophytes. Interestingly, the minimum algal bloom was observed in the combined area containing submerged macrophytes and zoobenthos, which was due to the synergistic interaction between the zoobenthos and the macrophytes. The metabolite extracts from the numerically dominant zoobenthos Limnodrilus hoffmeisteri had significant algal inhibitory effects of Microcystis aeruginosa, and displayed stimulatory effects on seed germination, seedling growth, and peroxidase activity of the prevalent submerged macrophyte Potamogeton malaianus. 27 active compounds in the worm metabolites were identified by gas chromatography-mass spectrometry (GC-MS). Among these compounds three chemicals arachidonic acid, eicosapentaenoic acid, and linoleic acid with concentrations of 13.92 ± 1.11, 10.57 ± 2.52, 2.75 ± 0.73 mg/kg dry weight, respectively, were confirmed as the typical allelochemicals with algal inhibition potential. In short, the metabolites allelopathy of L. hoffmeisteri can form and assist the synergistic effect between L. hoffmeisteri and P. malaianus on algal suppression. Thus, it is feasible to simultaneously restore submerged macrophytes and zoobenthos community in the disturbed eutrophic lakes for removing harmful algae.
在中国太湖，藻类数量在夏季明显大于晚春（p<0.01）。在夏季，与既没有底栖动物也没有沉水植物的疏浚区相比，填满沉水植物的区域藻类生物量和密度明显较低。有趣的是，在含有沉水植物和底栖动物的综合区域观察到最小的藻类水华，这是由于底栖动物和植物之间的协同相互作用。数量上占优势的底栖动物霍夫迈斯特水丝蚓的代谢产物对铜绿微囊藻具有显著的抑藻作用，并对优势沉水植物马来眼子菜的种子萌发、幼苗生长和过氧化物酶活性表现出刺激作用。通过气相色谱-质谱联用（GC-MS）鉴定了虫体代谢物中的 27 种活性化合物。在这些化合物中，三种化学物质花生四烯酸、二十碳五烯酸和亚油酸的浓度分别为 13.92±1.11、10.57±2.52 和 2.75±0.73mg/kg干重，被确认为具有抑藻潜力的典型化感物质。总之，霍夫迈斯特水丝蚓的代谢产物化感作用可以形成并协助霍夫迈斯特水丝蚓和马来眼子菜之间的协同作用，从而抑制藻类。因此，在受干扰的富营养化湖泊中同时恢复沉水植物和底栖动物群落以去除有害藻类是可行的。
