Peter G. Ryan

30.9k total citations · 4 hit papers
513 papers, 19.6k citations indexed

About

Peter G. Ryan is a scholar working on Ecology, Global and Planetary Change and Nature and Landscape Conservation. According to data from OpenAlex, Peter G. Ryan has authored 513 papers receiving a total of 19.6k indexed citations (citations by other indexed papers that have themselves been cited), including 363 papers in Ecology, 101 papers in Global and Planetary Change and 69 papers in Nature and Landscape Conservation. Recurrent topics in Peter G. Ryan's work include Avian ecology and behavior (250 papers), Wildlife Ecology and Conservation (94 papers) and Marine animal studies overview (86 papers). Peter G. Ryan is often cited by papers focused on Avian ecology and behavior (250 papers), Wildlife Ecology and Conservation (94 papers) and Marine animal studies overview (86 papers). Peter G. Ryan collaborates with scholars based in South Africa, United Kingdom and France. Peter G. Ryan's co-authors include Charles J. Moore, Coleen L. Moloney, Martín Thiel, Laurent Lebreton, Júlia Reisser, Henry S. Carson, François Galgani, Marcus Eriksen, Vonica Perold and David Grémillet and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

Peter G. Ryan

490 papers receiving 18.6k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Plastic Pollution in the World's Oceans: More than 5 Trillion Plastic Pieces Weighing over 250,000 Tons Afloat at Sea

2014 3.4k citations Martín Thiel, Peter G. Ryan et al. profile →
Monitoring the abundance of plastic debris in the marine environment

2009 1.2k citations Peter G. Ryan et al. profile →
Biofouling on buoyant marine plastics: An experimental study into the effect of size on surface longevity

2016 444 citations Peter G. Ryan et al. profile →
Microfibers in oceanic surface waters: A global characterization

2020 370 citations Giuseppe Suaria, Vonica Perold et al. Science Advances profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Peter G. Ryan South Africa	64	9.3k	9.0k	6.0k	3.0k	2.0k	513	19.6k
Martín Thiel Chile	55	12.1k 1.3×	4.3k 0.5×	8.5k 1.4×	2.7k 0.9×	545 0.3×	286	19.1k
David K. A. Barnes United Kingdom	52	5.4k 0.6×	5.3k 0.6×	3.4k 0.6×	3.1k 1.0×	448 0.2×	244	13.7k
Lars‐Anders Hansson Sweden	63	2.2k 0.2×	6.7k 0.7×	1.3k 0.2×	2.0k 0.6×	4.3k 2.2×	247	14.7k
Brendan J. Godley United Kingdom	74	2.7k 0.3×	9.5k 1.1×	1.6k 0.3×	8.1k 2.7×	12.0k 6.0×	363	18.4k
Francis Juanes Canada	45	1.9k 0.2×	4.7k 0.5×	1.3k 0.2×	3.8k 1.3×	3.7k 1.9×	292	9.6k
Mark L. Mallory Canada	48	2.9k 0.3×	5.0k 0.6×	1.6k 0.3×	1.1k 0.3×	694 0.3×	376	8.9k
S. J. Ormerod United Kingdom	64	1.7k 0.2×	10.9k 1.2×	780 0.1×	2.0k 0.7×	7.9k 4.0×	268	16.8k
Christian Laforsch Germany	45	6.7k 0.7×	1.4k 0.2×	4.8k 0.8×	328 0.1×	463 0.2×	166	9.7k
Mark O. Gessner Germany	59	1.5k 0.2×	13.8k 1.5×	673 0.1×	3.3k 1.1×	8.8k 4.4×	153	23.5k
Alex D. Rogers United Kingdom	49	1.5k 0.2×	5.7k 0.6×	1.1k 0.2×	3.3k 1.1×	935 0.5×	195	9.8k

Countries citing papers authored by Peter G. Ryan

Since Specialization

Citations

This map shows the geographic impact of Peter G. Ryan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Peter G. Ryan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Peter G. Ryan more than expected).

Fields of papers citing papers by Peter G. Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Peter G. Ryan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Peter G. Ryan. The network helps show where Peter G. Ryan may publish in the future.

Co-authorship network of co-authors of Peter G. Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of Peter G. Ryan. A scholar is included among the top collaborators of Peter G. Ryan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Peter G. Ryan. Peter G. Ryan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Shaw, Jessica M., et al.. (2025). Long-term tracking reveals variable partial migration and nomadism in an Endangered bustard. Ostrich. 96(3). 154–166.

Verhaegh, K., B. Lipschultz, D. Moulton, et al.. (2025). 2D electron density profile evolution during detachment in Super-X divertor L-mode discharges on MAST-U. Nuclear Fusion. 65(11). 116016–116016. 1 indexed citations

Ryan, Peter G., Lorien Pichegru, & Maëlle Connan. (2024). Tracing beach litter sources: Drink lids tell a different story from their bottles. Marine Pollution Bulletin. 201. 116186–116186. 6 indexed citations

Gabriel, Sofia I., Jeremy S. Herman, John F. Baines, et al.. (2024). House Mice in the Atlantic Region: Genetic Signals of Their Human Transport. Genes. 15(12). 1645–1645. 1 indexed citations

Schoombie, Stefan, Rory P. Wilson, Yan Ropert‐Coudert, Ben J. Dilley, & Peter G. Ryan. (2024). The efficiency of detecting seabird behaviour from movement patterns: the effect of sampling frequency on inferring movement metrics in Procellariiformes. Movement Ecology. 12(1). 59–59.

Connan, Maëlle, et al.. (2023). First evidence of mouse predation killing adult great albatrosses. Biological Invasions. 26(1). 25–31. 2 indexed citations

Schoombie, Stefan, RP Wilson, & Peter G. Ryan. (2023). Wind driven effects on the fine-scale flight behaviour of dynamic soaring wandering albatrosses. Marine Ecology Progress Series. 723. 119–134. 6 indexed citations

Cronin, Michael J., Matthew G. Davey, Peter G. Ryan, et al.. (2023). Heart Failure Association-International Cardio-Oncology Society Risk Score Validation in HER2-Positive Breast Cancer. Journal of Clinical Medicine. 12(4). 1278–1278. 9 indexed citations

Rawlence, Nicolas J., Hamish G. Spencer, Jonathan M. Waters, et al.. (2022). Rapid radiation of Southern Ocean shags in response to receding sea ice. Journal of Biogeography. 49(5). 942–953. 6 indexed citations

10.

Oppel, Steffen, Bethany L. Clark, Catharine Horswill, et al.. (2022). Cryptic population decrease due to invasive species predation in a long‐lived seabird supports need for eradication. Journal of Applied Ecology. 59(8). 2059–2070. 15 indexed citations

11.

Honorato‐Zimmer, Daniela, Eleanor A. Weideman, Peter G. Ryan, & Martín Thiel. (2022). Amounts, Sources, Fates and Ecological Impacts of Marine Litter and Microplastics in the Western Indian Ocean Region: A Review and Recommendations for Actions. 533–589. 9 indexed citations

12.

Suaria, Giuseppe, Vonica Perold, Jasmine Lee, et al.. (2020). Microfibers in oceanic surface waters: A global characterization. Science Advances. 6(23). eaay8493–eaay8493. 370 indexed citations breakdown →

13.

Cook, Timothée R., Rowan O. Martin, Jennifer D. Roberts, et al.. (2020). Parenting in a warming world: thermoregulatory responses to heat stress in an endangered seabird. Conservation Physiology. 8(1). coz109–coz109. 32 indexed citations

14.

Kassanjee, Reshma, et al.. (2019). Natal dispersal in the Southern Ground Hornbill Bucorvus leadbeateri. Ostrich. 90(2). 119–127. 5 indexed citations

15.

Pichegru, Lorien, David Grémillet, Robert J. M. Crawford, & Peter G. Ryan. (2010). Marine no-take zone rapidly benefits endangered penguin. Biology Letters. 6(4). 498–501. 120 indexed citations

16.

Chaban, Natalia, Martin Holland, & Peter G. Ryan. (2009). New cases, new findings. WORLD SCIENTIFIC eBooks. 1 indexed citations

17.

Ryan, Peter G.. (2009). Our (So-called) Battle for Australia. Quadrant. 53(9). 127. 1 indexed citations

18.

Sinclair, Ian, et al.. (2004). Birding western Angola. Bulletin of the African Bird Club. 11(2). 152–160. 2 indexed citations

19.

Underhill, Les G, et al.. (2003). The Prince Edward Islands Millennium Expedition: News and views. South African Journal of Science. 99. 407–409. 1 indexed citations

20.

Siegfried, W. R., et al.. (1988). Sex and plumage-type ratios of the Lesser Magellan Goose in southern Chile. Wildfowl (Wildfowl & Wetlands Trust). 2 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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