CAJ | 학술논문

以本地优势种中华（Rhodeus sinensis ）为试验对象，设成鱼和稚鱼两组处理，研究了其对水体营养盐浓度和浮游植物群落的影响。结果表明：养殖鱼后水体中的总氮（TN）、氨氮（NH3-N）和总磷（TP）等营养盐浓度明显增高，水质由试验始期的Ⅱ类标准恶化至劣Ⅴ类，其影响程度以成鱼处理最高；浮游植物的群落结构发生一定改变，生物多样性有所降低，密度和生物量明显增加，各处理均以大体积的衣藻为优势种，对照则以小体积的蹄形藻为优势种。鱼作为清澈水体的优势种鱼类，种群密度过高会造成水体营养盐升高并导致浮游植物生物量加大，成为恶化水质的隐患。
이본지우세충중화（Rhodeus sinensis ）위시험대상，설성어화치어량조처리，연구료기대수체영양염농도화부유식물군락적영향。결과표명：양식어후수체중적총담（TN）、안담（NH3-N）화총린（TP）등영양염농도명현증고，수질유시험시기적Ⅱ류표준악화지렬Ⅴ류，기영향정도이성어처리최고；부유식물적군락결구발생일정개변，생물다양성유소강저，밀도화생물량명현증가，각처리균이대체적적의조위우세충，대조칙이소체적적제형조위우세충。어작위청철수체적우세충어류，충군밀도과고회조성수체영양염승고병도치부유식물생물량가대，성위악화수질적은환。
Taking local dominant species rose bitterling Rhodeus sinensis as the test materials,this paper analyzed the fish effects on water nutrient concentrations and phytoplankton communities by setting two treatments,i.e.,adult group and juvenile group.The results showed that after adding bitt-erling R .sinensis ,water nutrient,i.e.,total nitrogen,ammonia nitrogen and total phosphorus concen-trations obviously increased,water quality deteriorated from Grade II to worse than Grade V,and a-dult showed a higher effect.Phytoplankton community structure presented some change,i.e.,biodi-versity decreased,while density and biomass significantly increased.Two treatments with bitterling fish were dominated by large-bodied Chlamydomonas ,and the control group dominated by small-bod-ied Kirchneriella .Therefore,as dominant fish of clear water,excessively high bitterling population density would result in the increment of both water nutrient concentrations and phytoplankton bio-mass,which would become the potential danger of water quality deterioration.