Toxic microcystis reduces tolerance of daphnia to increased chloride, and low chloride alleviates the harm of toxic microcystis to daphnia
Toxic microcystis reduces tolerance of daphnia to increased chloride, and low chloride alleviates the harm of toxic microcystis to daphnia
复制标题
有毒微囊藻降低水蚤对氯化物升高的耐受性，低氯化物减轻有毒微囊藻对水蚤的危害
DOI：
10.1016/j.chemosphere.2020.127594
复制
发表时间：
2020
期刊：
影响因子：
8.8
通讯作者：
Yang Zhou
中科院分区：
文献类型：
--
作者：
Li Yurou;Zhu Yuying;Ma Lili;Huang Jing;Sun Yunfei;Zhang Lu;Lyu Kai;Yang Zhou
Salinization of freshwater ecosystems caused by human activities and climate change is a global problem that threatens freshwater resources and aquatic organisms. The aggravation of salinization and the presence of cyanobacterial blooms may pose a serious threat to crustacean zooplanktonDaphnia. To test the consequences of these effects, we exposedDaphnia magnato the combined treatments of different chloride concentrations and three food compositions (100%Chlorella pyrenoidosa, 90%C. pyrenoidosa+ 10% toxicMicrocystis aeruginosa, 80%C. pyrenoidosa+ 20% toxicM. aeruginosa) for 21 days, recorded relevant life history indicators, and fitted them using Sigmoidal and Gaussian model if appropriate. Results showed that both increased chloride and the presence of toxicM. aeruginosain the food had significantly negative effects on key life history traits and clearance rate, and the two factors also had a significant interaction on the survival, development, and reproduction ofD. magna. The maximum values of the key life-history traits and clearance rate, the median effect chloride concentrations, and the optimal chloride concentrations derived from the models showed that the survival, reproduction, and clearance rate ofD. magnawere threatened by high chloride concentrations, which were exacerbated by the presence of toxicM. aeruginosa, but lower concentration of chloride was beneficial toD. magnato resist toxicM. aeruginosa. In conclusion, the combined effects of increasing chloride concentration and cyanobacterial blooms have severely adverse impacts on cladocerans, which may cause cladocera population to decline more rapidly and potentially disrupt the food webs of aquatic ecosystems.
