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2009年2月(冬)、5月(春)、8月(夏)和11月(秋)分别对湛江港湾的浮游植物和环境因子进行了调查,并对该海域潜在赤潮生物的时空分布及其影响因素进行了分析。结果表明,湛江港湾海域潜在赤潮生物共有126种,其中硅藻门26属85种,占潜在赤潮生物种类数的67.5%,甲藻门14属36种,占潜在赤潮生物种类数的28.6%,蓝藻门1属2种,占潜在赤潮生物种类数的1.6%,金藻门2属2种,占潜在赤潮生物种类数的1.6%,针胞藻纲1属1种,占潜在赤潮生物种类数的0.8%。种类数以春季最多,达89种,秋季次之,为71种,夏季61种,冬季最少,仅有58种。细胞丰度在12.36×104～43.55×104cells·L-1,春季最高,夏季次之,冬季最低,从各主要优势种的细胞丰度和细胞大小判断,该海域潜在赤潮生物的丰度均未达到赤潮发生的阈值。4季均出现的种类共有31种,季节相似性指数在0.43～0.50。优势种共有19种,全为硅藻,没有观测到甲藻。优势度最大的种类主要有浮动弯角藻(Eucampia zoodiacus)、旋链角毛藻(Chaetoceros curvisetus)和中肋骨条藻(Skeletonema costatum),没有全年优势种。中肋骨条藻、旋链角毛藻和冰河拟星杆藻(Asteri-onellopsis glacialis)为3季优势种。分析表明,潜在赤潮生物细胞丰度与叶绿素a、水温、盐度和pH值存在着极显著的正相关,与DIN和SiO32-存在着极显著的负相关,与PO43-不存在显著相关关系。
Phytoplankton and environmental factors in Zhanjiang Harbor were surveyed in February (winter), May (spring), August (summer) and November (autumn), and the spatial and temporal distribution of potential red tide organisms The influencing factors were analyzed. The results showed that there were altogether 126 species of potential red tide organisms in Zhanjiang Harbor, of which 85 species belong to 26 genera, accounting for 67.5% of the total number of potential species, 36 species belonging to 14 genera in the phylum, accounting for 28.6% of the total number of potential red tide organisms, 1 species belong to Cyanophyta, accounting for 1.6% of the total number of potential red tide organisms and 2 species belonging to 2 genera of Chlorella, accounting for 1.6% of the total number of potential red tide organisms. Of 0.8%. The number of species in spring up to 89 species, followed by autumn, to 71 species, 61 species in summer, the least in winter, only 58 species. The cell abundance was 12.36 × 104 ~ 43.55 × 104cells · L-1, the highest in spring, the second in summer and the lowest in winter. The abundance of potential red tide organisms in this area was not determined by the cell abundance and cell size of each dominant species Reach the threshold of occurrence of red tide. A total of 31 species appeared in 4 seasons, and the seasonal similarity index was 0.43 ~ 0.50. A total of 19 kinds of dominant species, all for diatoms, did not observe dinoflagellate. The most dominant species are Eucampia zoodiacus, Chaetoceros curvisetus and Skeletonema costatum, with no dominant species throughout the year. Skeletonema costatum, Chaetoceros gracilis and Asteri-onellopsis glacialis are dominant species in the third season. The results showed that there was a significant positive correlation between the abundance of potential red tide organisms and chlorophyll a, water temperature, salinity and pH, negatively correlated with DIN and SiO32-, and no significant correlation with PO43-.