| Plastic pollution in the world's oceans: more than 5 trillion plastic pieces weighing over 250,000 tons afloat at sea M Eriksen, LCM Lebreton, HS Carson, M Thiel, CJ Moore, JC Borerro, ... PloS one 9 (12), e111913, 2014 | 4905 | 2014 |
| Monitoring the abundance of plastic debris in the marine environment PG Ryan, CJ Moore, JA Van Franeker, CL Moloney Philosophical Transactions of the Royal Society B: Biological Sciences 364 …, 2009 | 1819 | 2009 |
| Roberts Birds of Southern Africa PAR Hockey, WRJ Dean, PG Ryan | 1474 | 2005 |
| The physical oceanography of the transport of floating marine debris E Van Sebille, S Aliani, KL Law, N Maximenko, JM Alsina, A Bagaev, ... Environmental Research Letters 15 (2), 023003, 2020 | 605 | 2020 |
| Biofouling on buoyant marine plastics: An experimental study into the effect of size on surface longevity FMC Fazey, PG Ryan Environmental pollution 210, 354-360, 2016 | 534 | 2016 |
| A brief history of marine litter research PG Ryan Marine anthropogenic litter, 1-25, 2015 | 511 | 2015 |
| Global research priorities to mitigate plastic pollution impacts on marine wildlife AC Vegter, M Barletta, C Beck, J Borrero, H Burton, ML Campbell, ... Endangered Species Research 25 (3), 225-247, 2014 | 411 | 2014 |
| Microfibers in oceanic surface waters: A global characterization G Suaria, A Achtypi, V Perold, JR Lee, A Pierucci, TG Bornman, S Aliani, ... Science advances 6 (23), eaay8493, 2020 | 356 | 2020 |
| Offshore diplomacy, or how seabirds mitigate intra-specific competition: a case study based on GPS tracking of Cape gannets from neighbouring colonies D Grémillet, G Dell¹Omo, PG Ryan, G Peters, Y Ropert-Coudert, ... Marine Ecology Progress Series 268, 265-279, 2004 | 351 | 2004 |
| The incidence and characteristics of plastic particles ingested by seabirds PG Ryan Marine environmental research 23 (3), 175-206, 1987 | 341 | 1987 |
| Plastic ingestion and PCBs in seabirds: is there a relationship? PG Ryan, AD Connell, BD Gardner Marine pollution bulletin 19 (4), 174-176, 1988 | 333 | 1988 |
| Birds of Africa south of the Sahara I Sinclair, P Ryan Princeton univ. press, 2003 | 320 | 2003 |
| Dense sampling of bird diversity increases power of comparative genomics S Feng, J Stiller, Y Deng, J Armstrong, QI Fang, AH Reeve, D Xie, G Chen, ... Nature 587 (7833), 252-257, 2020 | 315 | 2020 |
| A junk-food hypothesis for gannets feeding on fishery waste D Grémillet, L Pichegru, G Kuntz, AG Woakes, S Wilkinson, RJM Crawford, ... Proceedings of the Royal Society B: Biological Sciences 275 (1639), 1149-1156, 2008 | 305 | 2008 |
| Effects of ingested plastic on seabird feeding: evidence from chickens PG Ryan Marine pollution bulletin 19 (3), 125-128, 1988 | 304 | 1988 |
| Antarctica’s ecological isolation will be broken by storm-driven dispersal and warming CI Fraser, AK Morrison, AMC Hogg, EC Macaya, E van Sebille, PG Ryan, ... Nature climate change 8 (8), 704-708, 2018 | 296 | 2018 |
| Spatial match–mismatch in the Benguela upwelling zone: should we expect chlorophyll and sea‐surface temperature to predict marine predator distributions? D Grémillet, S Lewis, L Drapeau, CD van Der Lingen, JA Huggett, ... Journal of Applied Ecology 45 (2), 610-621, 2008 | 291 | 2008 |
| Can predation by invasive mice drive seabird extinctions? RM Wanless, A Angel, RJ Cuthbert, GM Hilton, PG Ryan Biology letters 3 (3), 241-244, 2007 | 291 | 2007 |
| How much is a clean beach worth? The impact of litter on beach users in the Cape Peninsula, South Africa JK Balance, A.*, Ryan, PG** and Turpie South African Journal of Science 96 (5), 210-213, 2000 | 284 | 2000 |
| Pelagic plastics and other seaborne persistent synthetic debris: a review of Southern Hemisphere perspectives MR Gregory, PG Ryan Marine debris: sources, impacts, and solutions, 49-66, 1997 | 272 | 1997 |
