【摘要】 研究了铜对近岸海水中三角褐指藻的毒性。铜离子活度(a_cu)的阈值为10^-9.1mol/dm³,此时藻的单位生长率（μ）不受a_cu影响;acu使μ降至零时为10^-7.0mol/dm³72小时EC₅₀值约为10^-7.4mol/dm³。得出μ与a_cu间的线性关系,a_cu的范围由阈值至刚大于零生长率所对应的a_cu值,可通过线性关系式得出。更多还原

【Abstract】 The toxicity of copper to Phacodactylum tricornutum isolated from costal sea water was studied. The threshold value, of cupric ion vetivity (acu)is 10 -9.1mol/dm3, at which specific growth rare(μ) of the alga was uneffected by the acu,the value of acu reducing μ to zero is 10-7.0 mol/dm3,the 72 h.EC50 value is about 10-7.4mol/dm 3 .The relationship between μ and acu can be expressed by the following equations.A linear relationship between μ and acu ( ranging from the threshold value to just above zero growth rate in respect to acu) is obtained, which can be derived from the above cquations.更多还原