Occurrence of polybrominated diphenyl ethers and benzotriazole UV stabilizers in the hadal amphipod Hirondellea gigas

Ryota Nakajima; Tetsuro Ikuta; Kazumasa Oguri; Heather Ritchie

doi:10.1016/j.isci.2023.107054

Occurrence of polybrominated diphenyl ethers and benzotriazole UV stabilizers in the hadal amphipod Hirondellea gigas

iScience. 2023 Jun 7;26(7):107054. doi: 10.1016/j.isci.2023.107054. eCollection 2023 Jul 21.

Authors

Ryota Nakajima¹, Tetsuro Ikuta¹, Kazumasa Oguri^{1

2}, Heather Ritchie³

Affiliations

¹ Research Institution for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan.
² HADAL and Nordcee, Department of Biology, University of Southern Denmark, 5230 Odense, Denmark.
³ RZSS WildGenes, Royal Zoological Society of Scotland, Edinburgh EH12 6TS, UK.

Abstract

The accumulation of polybrominated diphenyl ethers (PBDEs) and benzotriazole UV stabilizers (BZT-UVs) were examined in the hadal amphipod Hirondellea gigas caught from a near-land trench off the Japan island (9200 m). H. gigas were collected from two distinct sites: one is located at the outlet of submarine canyons directly connected to land and the other is apart from the outlet and geographically isolated from the first site. The level of the PBDEs in H. gigas at the canyon outlet (mean 219 ng/g lipid weight (l.w.)) was significantly higher than that in the isolated site (mean 42 ng/g l.w.) and BZT-UVs were only detected within the first site (mean 1.5 ng/g wet weight). In addition to vertical transport from the surface water, near-land trenches associated with submarine canyons and troughs may have more complex influx of contaminants through horizontal transportation from the land, resulting in more severe contamination.

Keywords: Environmental science; Marine organism; Marine processes.