In this study the biotransference of selenium copper, cadmium, zinc, arsenic and lead was measured in a contaminated seagrass ecosystem in Lake Macquarie, NSW, Australia, to determine if biomagnification of these trace metals is occurring and if they reac

This study investigates the effects of two herbicides on the hermatypic coral Porites cylindrica. The herbicides tested were 2,4-D and diuron, since they are commonly used and have different toxic characteristics. Corals were exposed to 10 and 100 mg l−1 2,4-D, and to 10, 50 and 100 μg−l diuron for 48 h respectively, and the effects were measured using an oxymeter and a diving PAM fluorometer. Coral gross primary production rate, gross primary production to respiration ratio and effective quantum yield were significantly reduced when exposed to 100 mg l−1 2,4-D while respiration seemed unaffected. All three concentrations of diuron caused a significant reduction in all measured parameters except respiration and maximum fluorescence yield, where a significant reduction was detected at 50 and 100 μg−1 diuron, respectively.