FN Archimer Export Format PT J TI Automating the characterisation of beach microplastics through the application of image analyses BT AF Gauci, Adam Deidun, Alan Montebello, John Abela, John Galgani, Francois AS 1:1;2:1;3:1;4:2;5:3; FF 1:;2:;3:;4:;5:PDG-ODE-LITTORAL-LERPAC; C1 Department of Geosciences, Faculty of Science, University of Malta, Msida, Malta Department of Computer Information Systems, Faculty of ICT, University of Malta, Msida, Malta Station de Corse, IFREMER, Immeuble Agostini- Z.I, Furiani, 20600, Bastia, Corsica, France C2 UNIV MALTA, MALTA UNIV MALTA, MALTA IFREMER, FRANCE SI CORSE SE PDG-ODE-LITTORAL-LERPAC IN WOS Ifremer UPR copubli-europe IF 2.482 TC 22 UR https://archimer.ifremer.fr/doc/00513/62471/69557.pdf LA English DT Article DE ;Image processing;Microplastics;Parameterisation;Monitoring obligations;Marine litter AB Four sandy beaches on the island of Malta in the Central Mediterranean were regularly sampled for Large MicroPlastic (LMP) particles having a diameter between 1 mm and 5 mm, at stations located at the waterline and 10 m inshore. The 10975 extracted LMP particles were characterised (dimensions, surface roughness, colour) through unaided visual observation, microscopic analyses, and an algorithm developed within the current study. Two-thirds of the isolated particles were smooth and the majority of these belonged to the grey-white colour category, with a low degree of opaqueness and discolouration, and a high degree of transparency, suggesting that these were dominated by low-density polyethylene LMPs. Conflicting evidence concerning the relative residence time of the isolated LMPs within seawater emerged from the colour and contour roughness determination, although an abundance of primary LMPs (production pellets) within our sample might have been responsible for the low contour roughness results obtained. Roughly six times as many particles were recorded within the inshore sampling stations as the particles recorded at the waterline stations. The developed algorithm performed very well when the dimension and colour parameter values it delivered were compared with those obtained by microscopic analyses. PY 2019 PD DEC SO Ocean & Coastal Management SN 0964-5691 PU Elsevier BV VL 182 UT 000498753700010 DI 10.1016/j.ocecoaman.2019.104950 ID 62471 ER EF