CAJ | 학술논문

根据历史资料和观测数据对异龙湖近20年来的营养盐和水生生态系统变化进行了分析。近20年来异龙湖营养盐含量始终处于较高的水平，营养盐含量波动较大并可明显分为三个时期，导致异龙湖营养盐波动的主要原因是水生生态系统的结构变化。异龙湖的水生生态系统呈现明显的退化趋势，自1950年代以来，藻类的优势种由硅藻转变为蓝藻，浮游动物种类由近170种减少为4种，底栖动物由13种减少为2种，水生植物由种类繁多转变为基本消失殆尽。
근거역사자료화관측수거대이룡호근20년래적영양염화수생생태계통변화진행료분석。근20년래이룡호영양염함량시종처우교고적수평，영양염함량파동교대병가명현분위삼개시기，도치이룡호영양염파동적주요원인시수생생태계통적결구변화。이룡호적수생생태계통정현명현적퇴화추세，자1950년대이래，조류적우세충유규조전변위람조，부유동물충류유근170충감소위4충，저서동물유13충감소위2충，수생식물유충류번다전변위기본소실태진。
The twenty-year change of nutrients and aquatic ecosystem of Yilong Lake was analyzed based on the historic monitoring data.The concentrations of nutrients have been high in the last 20 years.The concentrations of nutrients fluctuated three times.The main reason causing the fluctuation was the changes of structure of aquatic e-cosystem.The obvious degradation trend of aquatic ecosystem was observed.The dominant species of algae has been changed to blue algae from diatom.The number of zooplankton and zoobenthos has been reduced to 4 species from previous 170 and 2 species from previous 13 respectively.The number of hydrophyte has been almost extinct versus previous many species.