Two euryhaline rotifers, the temperate species Brachionus plicatilis and tropical rotundiformis , were used to investigate effects of iron (FeSO 4 ·7H 2 O), an essential trace metal, on reproductive patterns lifetables, including metabolism lipid reactive oxygen (ROS). B. was more sensitive with regard sexual reproduction. While had no significant effect population growth at 0–48 μg/mL, it caus...