CAJ | 학술논문

为了解贝江浮游藻类的分布特征与水质状况,于枯水期和丰水期对浮游藻类群落结构的时空动态进行调查和分析.结果表明,贝江共检出浮游藻类6门29科48属74种,其中枯水期5门23科41属58种,丰水期6门26科40属59种,藻类组成以硅藻门、绿藻门、蓝藻门为主,硅藻种群全年占优势,主要有颗粒沟链藻、变异脆杆藻、二列双菱藻、双头菱形藻、简单舟形藻、梅尼小环藻、肘状针杆藻、窄异极藻和膨胀桥弯藻；藻细胞总密度两期差异较小,枯水期平均值为3.54×105 cells·L-1,丰水期平均值为4.87×105 cells·L-1. RDA分析表明,DO、高锰酸盐指数和氮磷营养盐是影响贝江浮游藻类群落分布的主要环境因子,贝江流域水质整体良好,处于贫-中营养水平,但氮磷浓度较高,农业面源污染是导致水体中氮磷偏高的主要来源.
위료해패강부유조류적분포특정여수질상황,우고수기화봉수기대부유조류군락결구적시공동태진행조사화분석.결과표명,패강공검출부유조류6문29과48속74충,기중고수기5문23과41속58충,봉수기6문26과40속59충,조류조성이규조문、록조문、람조문위주,규조충군전년점우세,주요유과립구련조、변이취간조、이렬쌍릉조、쌍두릉형조、간단주형조、매니소배조、주상침간조、착이겁조화팽창교만조；조세포총밀도량기차이교소,고수기평균치위3.54×105 cells·L-1,봉수기평균치위4.87×105 cells·L-1. RDA분석표명,DO、고맹산염지수화담린영양염시영향패강부유조류군락분포적주요배경인자,패강류역수질정체량호,처우빈-중영양수평,단담린농도교고,농업면원오염시도치수체중담린편고적주요래원.
To study the distribution of phytoplankton and water quality of Beijiang River, the community structure of phytoplankton was investigated and analyzed in wet and dry seasons. The results showed that a total of 74 species belonging to six phyla, 29 family and 48 genera of phytoplankton were identified, including 58 species of five phyla,23 family and 41 genera in wet season and 59 species of six phyla,26 family and 40 genera in dry season. Phytoplankton community structure in Beijiang River was represented by Bacillariophyta, Chlorophyta and Cyanophyta. Bacillariophyta dominanted the phytoplankton, and the dominant species were Aulacoseira granulate, Fragilaria virescens, Surirella biseriata, Nitzschia amphibia, Navicula simplex, Cyclotella meneghiniana, Synedra ulna, Gomphonema angustatum and Cymbella tumida. There was little difference in phytoplankton density between both seasons with the mean values being 3. 54 × 105 and 4. 87 × 105 cells·L-1 in dry and wet seasons, respectively. Based on the RDA results, DO, permanganate index, nitrogen and phosphorus were the important environmental factors affecting the distribution of phytoplankton in Beijiang River. The water quality of Beijiang River was classified as oligo-mesotrophic level even if this river was subjected to nitrogen and phosphorus pollution mainly from agricultural non-point source.