Combined effects of climate change and environmentally relevant mixtures of endocrine disrupting compounds on the fitness and gonads? maturation dynamics of Nucella lapillus (Gastropoda)

Coastal areas are affected by multiple stressors like climate change and endocrine disruptors (EDCs). In the laboratory, we investigated the combined effects of increased temperature and EDCs (drospirenone and mercury) on the fitness and gonads' maturation dynamics of the marine gastropod Nucella lapillus for 21 days. Survival was negatively affected by all the stressors alone, while, in combination, a synergistic negative effect was observed.Both chemicals, as single factors, did not cause any effect on the maturation stage of ovaries and testis. However, in the presence of a higher temperature, it was clear a delay in the maturation stage of the ovaries, but not in the testis, suggesting a higher negative impact of the stressors in females than in males.In summary, drospirenone caused a low negative impact in aquatic species, like gastropods, but in combi-nation with other EDCs and/or increased temperature can be a matter of concern.

Automated summary

This study found that the combined effects of increased temperature and endocrine disruptors have a negative impact on coastal ecosystems, with a greater effect on females. While the individual stressors did not affect gonad maturation, a delay was observed in females when exposed to higher temperature. Therefore, the combination of endocrine disruptors and temperature increase should be a concern.