The characterization of iron (III) in seawater and related toxicity to early life stages of scleractinian corals.

摘要: Currently toxicity data for iron (Fe) in seawater are limited; furthermore, these of poor quality as a result the importance Fe solubility test solutions being overlooked. The present study characterized and lability Fe(III) then examined effects on fertilization success larval survival tropical marine scleractinian corals Acropora spathulata Platygyra daedalea. We first assessment early life stages corals. Concentrations both soluble labile forms were very low, with dissolved concentrations ≤0.195 mg/L bioassay chemical determinations revealing ≤1.21 mg/L. For experiments, median effect concentration (EC50) value total was 25 mg/L most sensitive species, P. daedalea, whereas EC50 values A. ranged between 40 66 mg/L. lethal daedalea 47 mg/L after 72-h exposure. provide keystone species that could be used to help generate more reliable guideline waters. Environ Toxicol Chem 2018;37:1104-1114. © 2017 SETAC.