Are shallow-water shrimps proxies for hydrothermal-vent shrimps to assess the impact of deep-sea mining?. (October 2019)

• Record Type: Journal Article
• Authors: Mestre, N.C.; Auguste, M.; de Sá, L.C.; Fonseca, T.G.; Cardoso, C.; Brown, A.; Barthelemy, D.; Charlemagne, N.; Hauton, C.; Machon, J.; Ravaux, J.; Shillito, B.; Thatje, S.; Bebianno, M.J.
• Is Part Of: Marine environmental research. Volume 151(2019)
• Publication Date: 2019-10
• Subjects: Deep-sea mining -- Ecotoxicology -- Biomarkers -- Mirocaris fortunata -- Palaemon; Marine pollution -- Environmental aspects -- Periodicals; Marine ecology -- Periodicals; Mer -- Pollution -- Aspect de l'environnement -- Périodiques; Écologie marine -- Périodiques; Electronic journals; 577.705
• DOI: 10.1016/j.marenvres.2019.104771
• Languages: English
• ISSNs: 0141-1136

Abstract

Abstract: Polymetallic seafloor massive sulphide deposits are potential targets for deep-sea mining, but high concentrations of metals (including copper - Cu) may be released during exploitation activities, potentially inducing harmful impact. To determine whether shallow-water shrimp are suitable ecotoxicological proxies for deep-sea hydrothermal vent shrimp the effects of waterborne Cu exposure (3 and 10 days at 0.4 and 4 μM concentrations) in Palaemon elegans, Palaemon serratus, and Palaemon varians were compared with Mirocaris fortunata . Accumulation of Cu and a set of biomarkers were analysed. Results show different responses among congeneric species indicating that it is not appropriate to use shallow-water shrimps as ecotoxicological proxies for deep-water shrimps. During the evolutionary history of these species they were likely subject to different chemical environments which may have induced different molecular/biochemical adaptations/tolerances. Results highlight the importance of analysing effects of deep-sea mining in situ and in local species to adequately assess ecotoxicological effects under natural environmental conditions. Highlights: Biochemical responses differ among congeneric shallow-water shrimp exposed to Cu. Evolution in different chemical environments induced different biomarker levels. Shallow-water shrimp aren't adequate ecotoxicological proxies for deep-water shrimp. Future work should focus on analysing effects of metals in situ and in local species.