A simulative study with different concentration of oil wastewater showed no harmful effect on Kandelia candel seedlings exposed 50mg/L and 100mg/L oil wastewater,however,this concentration stimulated the growth of seedlings.Treated with 200mg/L oil wastewater,some physiological indexes were affected,but seedlings still maintained normal growth.While treated with 400mg/L and 800mg/L of oil wastewater,almost all the eco physiological indexes were affected significantly or very significantly,and even caus...