James J. Roper

2.1k total citations · 1 hit paper
51 papers, 1.5k citations indexed

About

James J. Roper is a scholar working on Ecology, Evolution, Behavior and Systematics, Ecology and Nature and Landscape Conservation. According to data from OpenAlex, James J. Roper has authored 51 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Ecology, Evolution, Behavior and Systematics, 27 papers in Ecology and 21 papers in Nature and Landscape Conservation. Recurrent topics in James J. Roper's work include Avian ecology and behavior (20 papers), Plant and animal studies (15 papers) and Ecology and Vegetation Dynamics Studies (15 papers). James J. Roper is often cited by papers focused on Avian ecology and behavior (20 papers), Plant and animal studies (15 papers) and Ecology and Vegetation Dynamics Studies (15 papers). James J. Roper collaborates with scholars based in Brazil, United States and Japan. James J. Roper's co-authors include Thomas E. Martin, Márcia C. M. Marques, Rosana Moreira da Rocha, Fábio Bettini Pitombo, Robert E. Ricklefs, Kimberly Sullivan, Fernando C. Passos, Sergio Massayoshi Nunomura, Wanderli Pedro Tadei and Míriam Silva Rafael and has published in prestigious journals such as SHILAP Revista de lepidopterología, Oikos and Marine Biology.

In The Last Decade

James J. Roper

48 papers receiving 1.3k citations

Hit Papers

Nest Predation and Nest-Site Selection of a Western Popul... 1988 2026 2000 2013 1988 100 200 300 400 500
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.

  1. Nest Predation and Nest-Site Selection of a Western Population of the Hermit Thrush
    1988 571 citations James J. Roper et al. profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
James J. Roper Brazil 15 1.1k 548 407 299 165 51 1.5k
J. P. Myers United States 22 1.3k 1.1× 561 1.0× 568 1.4× 274 0.9× 104 0.6× 33 1.6k
Kevin L. Teather Canada 20 692 0.6× 536 1.0× 304 0.7× 144 0.5× 31 0.2× 42 1.2k
Maiken Winter United States 16 1.2k 1.1× 200 0.4× 496 1.2× 415 1.4× 205 1.2× 23 1.4k
Jeff S. Hatfield United States 24 978 0.9× 321 0.6× 381 0.9× 231 0.8× 140 0.8× 70 1.4k
Juan Arizaga Spain 18 1.0k 0.9× 448 0.8× 327 0.8× 222 0.7× 176 1.1× 189 1.3k
K. F. Conrad United Kingdom 22 774 0.7× 868 1.6× 694 1.7× 265 0.9× 559 3.4× 37 1.7k
Ralph W. Schreiber United States 19 1.0k 0.9× 259 0.5× 283 0.7× 322 1.1× 82 0.5× 53 1.3k
Gary Langham United States 17 992 0.9× 580 1.1× 532 1.3× 584 2.0× 895 5.4× 25 1.8k
Staffan Ulfstrand Sweden 22 1.3k 1.1× 655 1.2× 523 1.3× 107 0.4× 180 1.1× 45 1.5k
Fábio Olmos Brazil 17 630 0.6× 256 0.5× 426 1.0× 145 0.5× 124 0.8× 53 939

Countries citing papers authored by James J. Roper

Since Specialization
Citations

This map shows the geographic impact of James J. Roper'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 James J. Roper with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites James J. Roper more than expected).

Fields of papers citing papers by James J. Roper

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James J. Roper. 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 James J. Roper. The network helps show where James J. Roper may publish in the future.

Co-authorship network of co-authors of James J. Roper

This figure shows the co-authorship network connecting the top 25 collaborators of James J. Roper. A scholar is included among the top collaborators of James J. Roper 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 James J. Roper. James J. Roper is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Roper, James J.. (2023). Nest-sites Influence Nest Predation Differently at Natural and Experimental Nests. Digital Commons - University of South Florida (University of South Florida). 2 indexed citations
2.
3.
Cavarzere, Vagner, et al.. (2021). Geographical drivers of altitudinal diversity of birds in the Atlantic Forest. Biologia. 76(11). 3275–3285. 2 indexed citations
4.
Roper, James J., et al.. (2019). Southern Lapwing Vanellus chilensis cooperative helpers at nests are older siblings. Ibis. 162(1). 227–231. 5 indexed citations
5.
Varela, Sara, et al.. (2018). Consequences of dispersal limitation and habitat fragmentation for the Brazilian heart‐tongued frogs (Phyllodytes spp.). Austral Ecology. 43(5). 547–557. 1 indexed citations
6.
Lopes, Susana, et al.. (2018). MOLECULAR SEX DETERMINATION IN NEOTROPICAL MONOCHROMATIC HUMMINGBIRDS. Ornitología Neotropical. 29. 225–228.
7.
Roper, James J., et al.. (2018). Experimental food supplementation increases reproductive effort in the Variable Antshrike in subtropical Brazil. PeerJ. 6. e5898–e5898. 5 indexed citations
8.
Roper, James J., et al.. (2016). BREEDING BIOLOGY OF PASSERINES IN THE SUBTROPICAL BRAZILIAN ATLANTIC FOREST. Ornitología Neotropical. 26(4). 363–374. 23 indexed citations
9.
Bernardi, Itiberê P., et al.. (2014). Small mammal community structure and vertical space use preferences in nonfragmented Atlantic Forest. Mammalia. 78(4). 4 indexed citations
10.
Roper, James J., et al.. (2014). The Rufous Hornero (Furnarius rufus) nest as an incubation chamber. Journal of Thermal Biology. 47. 7–12. 12 indexed citations
11.
Roper, James J., et al.. (2013). Early singing onset in the black-cheeked gnateater (Conopophaga melanops).. Revista Brasileira de Ornitologia. 21(51). 5. 1 indexed citations
12.
Morais, Rosana Nogueira de, et al.. (2012). VALIDATION OF A FECAL GLUCOCORTICOID METABOLITE ASSAY FOR COLLARED PECCARIES (PECARI TAJACU). Journal of Zoo and Wildlife Medicine. 43(2). 275–282. 9 indexed citations
13.
Ludwig, Gabriela, et al.. (2011). Howler and capuchin monkey densities in riparian forests on islands and adjacent shores on the Upper Paraná River, southern Brazil. Neotropical Primates. 18(2). 39–43. 6 indexed citations
14.
Cardoso, Márcio Zikán, James J. Roper, & Lawrence E. Gilbert. (2009). Prenuptial agreements: mating frequency predicts gift‐giving inHeliconiusspecies. Entomologia Experimentalis et Applicata. 131(2). 109–114. 15 indexed citations
15.
Rocha, Rosana Moreira da, et al.. (2009). Sexual and asexual reproduction in Didemnum rodriguesi (Ascidiacea, Didemnidae). Iheringia Série Zoologia. 99(1). 106–110. 11 indexed citations
16.
17.
Serafini, Patrícia Pereira, et al.. (2008). Annual pattern of fecal corticoid excretion in captive Red-tailed parrots (Amazona brasiliensis). Journal of Comparative Physiology B. 178(4). 487–493. 10 indexed citations
18.
Roper, James J., et al.. (2007). Mother–offspring associations in Northern muriquis, Brachyteles hypoxanthus. American Journal of Primatology. 70(3). 301–305. 8 indexed citations
19.
Rocha, Rosana Moreira da, et al.. (2007). Use of artificial substrata by introduced and cryptogenic marine species in Paranaguá Bay, southern Brazil. Biofouling. 23(5). 319–330. 55 indexed citations
20.
Roper, James J.. (2006). O que o “manejo da vida selvagem” significa para o Brasil?. Natureza & Conservação. 4(1). 19–28. 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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