CAJ | 학술논문

在洋河水库设置 6 个采样点, 对浮游植物进行了周年研究, 并在夏季进行了每周一次的加密采样, 以揭示水华期间藻类优势种演替规律.结果表明洋河水库全年共检测到浮游植物8门41属49种, 群落季节变化与温度密切相关.春季隐藻门的啮齿隐藻(Cryptomonas erosa)为优势,夏季初期表层水温在25℃以下时,绿藻门的波吉卵囊藻(Oocystis borgei)占主要优势;当表层水温升至25℃以上,微囊藻(Microcystisspp.)迅速取代其成为绝对优势.秋季硅藻门的克洛脆杆藻(Fragiaria crotomensis)和隐藻门的啮齿隐藻(C. erosa)为优势.空间分布上水库北部浅水区域隐藻和硅藻生物量普遍高于南部; 受东南风影响, 蓝藻生物量在西洋河口S2点位最大.CCA分析表明夏季水华主体微囊藻的生物量与氮浓度正相关, 螺旋鱼腥藻在夏季仅作为第二优势种短暂出现于西洋河口处, 其出现与否受到磷营养盐的限制.
재양하수고설치 6 개채양점, 대부유식물진행료주년연구, 병재하계진행료매주일차적가밀채양, 이게시수화기간조류우세충연체규률.결과표명양하수고전년공검측도부유식물8문41속49충, 군락계절변화여온도밀절상관.춘계은조문적교치은조(Cryptomonas erosa)위우세,하계초기표층수온재25℃이하시,록조문적파길란낭조(Oocystis borgei)점주요우세;당표층수온승지25℃이상,미낭조(Microcystisspp.)신속취대기성위절대우세.추계규조문적극락취간조(Fragiaria crotomensis)화은조문적교치은조(C. erosa)위우세.공간분포상수고북부천수구역은조화규조생물량보편고우남부; 수동남풍영향, 람조생물량재서양하구S2점위최대.CCA분석표명하계수화주체미낭조적생물량여담농도정상관, 라선어성조재하계부작위제이우세충단잠출현우서양하구처, 기출현여부수도린영양염적한제.
The Yanghe Reservoir is an important drinking water source for Qinhuangdao City. In recent years, severe blooms of cyanobacteria in this reservoir have become a growing threat to the water safety. To study the temporal and spatial patterns of the phytoplankton growth in Yanghe Reservoir, we continuously collected water samples from six sites throughout one year with a higher sampling frequency during the summer. We identified 49 phytoplankton species that belonged to 41 genera and 8 phyla. The seasonal variation of community structure was closely related to the tem-perature.Cryptomonas erosa of Cryptophyta was the dominant species in the spring.Oocystis borgeiof Chlorophyta was the dominant species in the early summer when the temperature of surface water was below 25℃.Microcystis spp. of Cyanophyta later became dominant when the water temperature rose above 25℃.Fragiaria crotomensis of Bacil-lariophyta andC. erosa were the dominant species in the autumn. The total biomass of both Cryptophyta and Diatom in the north part of the reservoir was higher than that in the south part. Due to the impact of southeast wind, the biomass of cyanobacteria in the west river mouth (S2) was the highest. CCA analysis showed positive correlation between the bio-mass ofMicrocystis spp. and the nitrogen level.Anabaena spiroides was only found in west river mouth and was short-lived. The appearance ofAnabaena spiroides could depend on the phosphorus level.