CAJ | 학술논문

根据2006-2007年度4个季节航次的实测资料,分析了黄海冷水团水域浮游植物叶绿素及其粒级结构的时空分布特征及季节变化规律,结果表明,在研究海域30 m以浅叶绿素总量的平均含量从高到低的顺序为:春季的(1.01 mg/m3)、夏季的(0.81 mg/m3)、秋季(0.72 mg/m3)、冬季(0.68 mg/m3);在叶绿素浓度大于1 mg/m3和小于1 mg/m3的区域浮游植物粒级结构差异较大,在整个研究海域,粒径较小的微型和微微型浮游植物对总生物量的贡献始终占主导(＞65%),粒径较大的小型浮游植物在冬季和春季贡献率相对较高;从季节尺度看,浮游植物的平均粒级指数从大到小的顺序为:春季的(15.47 μm),冬季的(11.08μm),秋季的(8.61 μm),夏季的(6.52μm);尽管不同季节水文和化学环境差异显著,但是不同粒径浮游植物的贡献率随总生物量的变化表现出一致性的规律.对环境因子与叶绿素分布的相关分析表明,浮游植物的生长在夏季主要受到营养盐来源的限制,冬季主要受到水体混合引起的光照限制,秋季可能受到磷酸盐和水体混合的共同限制.浮游植物粒级结构的分布格局主要是由各组分在不同环境中的资源竞争优势决定的.
근거2006-2007년도4개계절항차적실측자료,분석료황해랭수단수역부유식물협록소급기립급결구적시공분포특정급계절변화규률,결과표명,재연구해역30 m이천협록소총량적평균함량종고도저적순서위:춘계적(1.01 mg/m3)、하계적(0.81 mg/m3)、추계(0.72 mg/m3)、동계(0.68 mg/m3);재협록소농도대우1 mg/m3화소우1 mg/m3적구역부유식물립급결구차이교대,재정개연구해역,립경교소적미형화미미형부유식물대총생물량적공헌시종점주도(＞65%),립경교대적소형부유식물재동계화춘계공헌솔상대교고;종계절척도간,부유식물적평균립급지수종대도소적순서위:춘계적(15.47 μm),동계적(11.08μm),추계적(8.61 μm),하계적(6.52μm);진관불동계절수문화화학배경차이현저,단시불동립경부유식물적공헌솔수총생물량적변화표현출일치성적규률.대배경인자여협록소분포적상관분석표명,부유식물적생장재하계주요수도영양염래원적한제,동계주요수도수체혼합인기적광조한제,추계가능수도린산염화수체혼합적공동한제.부유식물립급결구적분포격국주요시유각조분재불동배경중적자원경쟁우세결정적.
The spatio-temoral distributions and seasonal variations of phytoplankton chlorophyll biomass and its size structure in the Huanghai(Yellow) Sea Cold Water Mass were studied based on the four cruises during 2006-2007.The results show that the average chlorophyll concentration in the upper 30 m layer is in the order of spring (1.01 mg/m3) greater than summer (0.81 mg/m3) greater than autumn (0.72 mg/ m3)greater than winter (0.68 mg/m3).The phytoplankton size structures are significantly different be tween the area where Chl a concentration is greater than 1 mg/m3 and less than 1 mg/m3.In the whole region,smaller-sized nanophytoplankton and picophytoplankton dominated the biomass (＞65%),while the contribution of microphytoplankton was relatively higher in winter and spring cruises.The average size index of phytoplankton is in the order of spring (15.47 μm) greater than winter (11.08 μm) greater than autumn (8.61 μm) greater than summer (6.52μm).The relationships between the total biomass and the contributions of different size fractions show consistent trend in the four cruises in spite of the contrasting physical and chemical environments.The analysis of the relationships between the environmental factors and the chlorophyll concentrations shows that the growth of phytoplankton is limited by the nutrients a vailability in summer and by the weak light conditions caused by vertical mixing in winter.Phosphorus limitation and vertical mixing might be collectively responsible for the low chlorophyll level in autumn.The distribution patterns of phytoplankton size structures were mainly determined by their relatively competition advantages in different environments.