摘要
附着生物是水生态系统中重要的组成部分,在物质循环和能量流动中扮演着重要的角色。已有研究表明,可以利用人工附着基构建附着生物群落改善水体水质,但是附着基的理化性质影响了附着生物对水体水质的改善效果。本实验通过室外中宇宙模拟实验,比较了3种材质的人工附着基(玻璃纤维网、尼龙网和聚乙烯网)对富营养水体水质的改善效果。结果表明:3种附着基显著降低了水体中营养盐的浓度,两两比较发现尼龙网和聚乙烯网对总氮的去除效果显著优于玻璃纤维网,聚乙烯网对总磷的去除效果显著优于其他两种;同时,3种附着基显著抑制了浮游植物的生长,但附着基材质之间无显著差异。不同材质的人工附着基上附着生物的生物量和增长率的差异以及附着生物的种类可能是导致水质提升效果出现差异的主要原因。综上,聚乙烯人工附着基净化水质效果最好,且价格实惠。因此,在利用人工附着基技术改善富营养水体水质时,建议选用聚乙烯材质的人工附着基。
Periphyton is an important component of aquatic ecosystems and plays an important role in material circulation and energy flow.Previous studies have shown that it is possible to improve water quality by using artificial attachment groups,but the physical and chemical properties of the attachment groups affect the effect of the attachment groups.An outdoor mesocosm experiment were conducted to compare the effectiveness of three artificial substrates(nylon,PE and fiberglass)on water quality improvement of eutrophic waterbodies.Results showed that three artificial substrates significantly reduced water nutrient concentrations.Post hoc comparisons found that nylon and PE artificial substrate were better than fiberglass artificial substrate in removal of total nitrogen,and PE was the most effective substrate in removal of total phosphorus.Artificial substrates suppressed the growth of phytoplankton,whereas no significant difference was detected among three artificial substrates.Differences in periphyton biomass,community and growth rate induced by the variations of physiochemical properties and structures among artificial substrates may be the potential mechanisms.In conclusion,our study suggested PE was more effective in improving water quality of eutrophic waters than nylon and fiberglass,and therefore should be used to mitigate eutrophication in related water engineering projects.
作者
宁晓雨
陶贻亮
梅才华
谷娇
NING Xiao-yu;TAO Yi-liang;MEI Cai-hua;GU Jiao(Chuzhou University,Chuzhou 239000,China;Taiyuan Normal University,Jinzhong 030619,China)
出处
《环境生态学》
2021年第11期63-66,72,共5页
Environmental Ecology
基金
滁州学院大学生创新创业训练项目(2021cxxl425)
安徽省高校自然科学和人文社科研究一般项目(KJ2020B11)
山西省应用基础研究青年基金项目(201801D221286)
安徽省高校优秀青年人才支持计划重点项目(gxyqZD2020046)联合资助。
关键词
富营养化
人工附着基
附着生物
总氮
总磷
Eutrophication
artificial substrate
periphyton
total nitrogen
total phosphorus
