光照强度和盐度对塔玛亚历山大藻生长的影响

采用一次性培养方法,在3个光照强度(3 000 lx、6 000 lx、12 000 lx)和7个盐度(10、15、20、25、30、35、40)下,研究了光照强度和盐度对塔玛亚历山大藻生长的影响。结果表明:光照强度对塔玛亚历山大藻的生长有显著性影响(p 0.05),盐度对塔玛亚历山大藻的生长有极显著性影响(p 0.01),光照强度和盐度的交互作用无显著影响(p 0.05)。无论在哪一种盐度条件下,在3 000 lx、6 000 lx和12 000 lx 3种光照强度中,均以 6 000 lx时塔玛亚历山大藻的藻细胞密度值最大,生长情况最好。而无论在哪种光照条件下,7个盐度梯度中,均以盐度为30时藻细胞的密度值最大,生长状况最佳。即最适宜塔玛亚历山大藻生长的光照强度为6 000 lx,盐度为30,此条件下藻细胞达到最大密度值为 65.93104 /mL,最大生长速率为0.3679,平均生长速率为 0.1553 。

Effect of salinity and illumination on the growth of Alexandrium tamarense

This study investigated the effect of salinity and illumination on the growth of Alexandrium tamarense. Batch cultures were treated at a combination of different levels of salinity (10、15、20、25、30、35 and 40) and illumination (3 000 lx、6 000 lx and 12 000 lx).The results showed that illumination influenced the growth of A. tamarense significantly (p 0.05), and the value of salinity also influenced the growth of A. tamarense significantly (p 0.01). However, their interaction was not significant (p 0.05). The A. tamarense under 6 000 lx displayed the highest cell density and the best condition of growth among all groups of illumination in any salinity level. Meanwhile, the A. tamarense in the salinity of 30 revealed the highest cell density and the best growth condition among the 7 salinity gradients in the condition of any illumination. Among them, the highest cell density of 65.93104 cell/mL was achieved with the illumination of 6 000 lx and the salinity of 30.Its corresponding maximum and average growth rates were 0.3679 and 0.1553, respectively.