FN Archimer Export Format PT J TI Status and future recommendations for recording and monitoring litter on the Arctic seafloor BT AF Grøsvik, Bjørn Einar Buhl-Mortensen, Lene Bergmann, Melanie Booth, Andy M. Gomiero, Alessio Galgani, Francois AS 1:1;2:2;3:3;4:4;5:5;6:6; FF 1:;2:;3:;4:;5:;6:PDG-ODE-LITTORAL-LERPAC; C1 Institute of Marine Research, 115347, Bergen, Norway Institute of Marine Research, 115347, Bergen, Norway Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, 84597, Bremerhaven, Germany SINTEF Ocean, 555971, SINTEF Sealab, Brattørkaia 17 C, Trondheim, Norway NORCE, Department of Climate and Environment, Stavanger, Norway Ifremer, Department of Oceanography and Ecosystem dynamics, Bastia, France C2 IMR (BERGEN), NORWAY IMR (BERGEN), NORWAY INST A WEGENER, GERMANY SINTEF OCEAN, NORWAY NORCE, NORWAY IFREMER, FRANCE SI CORSE SE PDG-ODE-LITTORAL-LERPAC IN WOS Ifremer UPR DOAJ copubli-europe IF 3.3 TC 1 UR https://archimer.ifremer.fr/doc/00803/91479/97326.pdf LA English DT Article CR INTERNATIONAL BOTTOM TRAWL SURVEY (IBTS) MEDITS DE ;circumpolar;plastic pollution;sea bed;standardization;harmonization AB Marine litter in the Arctic Basin is influenced by transport from Atlantic and Pacific waters. This highlights the need for harmonization of guidelines across regions. Monitoring can be used to assess temporal and spatial trends but can also be used to assess if environmental objectives are reached, for example to evaluate the effectiveness of mitigation measures. Seafloor monitoring by trawling needs substantial resources and specific sampling strategies to be sufficiently robust to demonstrate changes over time. Observation and visual evaluation in shallow and deep waters using towed camera systems, ROVs and submersibles are well suited for the Arctic environment. The use of imagery still needs to be adjusted through automation and image analyses, including deep learning approaches and data management, but will also serve to monitor areas with a rocky seafloor. We recommend developing a monitoring plan for seafloor litter by selecting representative sites for visual inspection that cover different depths and substrata in marine landscapes, and recording the litter collected or observed across all forms of seafloor sampling or imaging. We need better coverage and knowledge of status of seafloor litter for the whole Arctic and recommend initiatives to be taken for regions where such knowledge is lacking. PY 2023 PD JUL SO Arctic Science SN 2368-7460 PU Canadian Science Publishing VL 9 IS 2 UT 000963782100001 BP 345 EP 355 DI 10.1139/AS-2022-0017 ID 91479 ER EF