The effect of different initial density on Amphidinium carterae Hulburt and Krenia mikimotoi Hansen

The experimental study of the interaction between Amphidinium carterae Hulburt and Krenia mikim otoi Hansen is carried in ecological conditions..The results showed tha in single culture system,A.carterae and K.mikimotoi growth curves Karen Logistic growth model,different initial density ratio could have a significant impact on the growth of two microalgae:With the initial density increases,the exponential phase and stationary phase is due to come earlier,and instantaneous population growth rate(r)and environmental carrying capacity(K)decreased.

蒽胁迫对米氏凯伦藻生长及抗氧化酶活性的影响

运用实验生态学和生物化学的方法研究了多环芳烃(PAHs)—蒽胁迫对米氏凯伦藻生长的影响及抗氧化酶(SOD、CAT、POD)活性的影响.结果表明:随着蒽质量浓度的增加,对米氏凯伦藻生长的抑制作用增强,且有较强的剂量—效应关系;而抗氧化酶均出现了不同程度的应激活性,以减少蒽胁迫对藻细胞自身的伤害.说明抗氧化酶在一定的污染物浓度范围内具有防御保护作用,且作用大小不同.