Tom A. Ranker

3.8k total citations · 1 hit paper
82 papers, 3.1k citations indexed

About

Tom A. Ranker is a scholar working on Ecology, Evolution, Behavior and Systematics, Plant Science and Nature and Landscape Conservation. According to data from OpenAlex, Tom A. Ranker has authored 82 papers receiving a total of 3.1k indexed citations (citations by other indexed papers that have themselves been cited), including 71 papers in Ecology, Evolution, Behavior and Systematics, 25 papers in Plant Science and 12 papers in Nature and Landscape Conservation. Recurrent topics in Tom A. Ranker's work include Fern and Epiphyte Biology (51 papers), Plant and animal studies (47 papers) and Plant Diversity and Evolution (44 papers). Tom A. Ranker is often cited by papers focused on Fern and Epiphyte Biology (51 papers), Plant and animal studies (47 papers) and Plant Diversity and Evolution (44 papers). Tom A. Ranker collaborates with scholars based in United States, France and Germany. Tom A. Ranker's co-authors include Christopher H. Haufler, Harald Schneider, Alan Р. Smith, Michael Sundue, Paul G. Wolf, Raymond Cranfill, Pamela S. Soltis, Barbara S. Parris, Sandra K. Floyd and Chrissen E. C. Gemmill and has published in prestigious journals such as Nature, Trends in Ecology & Evolution and The Science of The Total Environment.

In The Last Decade

Tom A. Ranker

79 papers receiving 2.9k 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.

Genetic diversity, mating systems, and interpopulation gene flow in neotropical Hemionitis palmata L. (Adiantaceae)

1992 584 citations Tom A. Ranker profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Tom A. Ranker United States	30	2.2k	833	687	563	496	82	3.1k
Clarisse Palma‐Silva Brazil	25	1.7k 0.8×	650 0.8×	845 1.2×	411 0.7×	601 1.2×	87	2.5k
Peter B. Heenan New Zealand	23	1.3k 0.6×	1.1k 1.3×	414 0.6×	502 0.9×	720 1.5×	160	2.2k
Steven J. Brunsfeld United States	21	850 0.4×	673 0.8×	664 1.0×	428 0.8×	451 0.9×	35	1.8k
Andrea E. Schwarzbach United States	20	1.1k 0.5×	1.1k 1.4×	930 1.4×	326 0.6×	804 1.6×	61	2.4k
Ovidiu Paun Austria	32	1.8k 0.8×	1.6k 2.0×	989 1.4×	470 0.8×	1.2k 2.4×	75	3.1k
Terry A. Hedderson South Africa	31	2.6k 1.2×	1.7k 2.1×	615 0.9×	728 1.3×	1.1k 2.3×	102	3.9k
Jeremy M. Beaulieu United States	29	1.6k 0.7×	758 0.9×	718 1.0×	791 1.4×	1.0k 2.1×	43	3.0k
Ruth J. Eastwood United Kingdom	10	1.1k 0.5×	1.1k 1.3×	524 0.8×	390 0.7×	511 1.0×	14	2.2k
Troy E. Wood United States	16	861 0.4×	1.0k 1.2×	698 1.0×	427 0.8×	661 1.3×	21	2.2k
John G. Bishop United States	24	1.1k 0.5×	1.5k 1.8×	486 0.7×	915 1.6×	657 1.3×	46	2.9k

Countries citing papers authored by Tom A. Ranker

Since Specialization

Citations

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

Fields of papers citing papers by Tom A. Ranker

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Tom A. Ranker. 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 Tom A. Ranker. The network helps show where Tom A. Ranker may publish in the future.

Co-authorship network of co-authors of Tom A. Ranker

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

All Works

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20 of 20 papers shown

Schrader, Julian, Patrick Weigelt, Lirong Cai, et al.. (2024). Islands are key for protecting the world’s plant endemism. Nature. 634(8035). 868–874. 17 indexed citations

Zhou, Xin‐Mao, R. Knapp, Barbara S. Parris, et al.. (2023). A global phylogeny of grammitid ferns (Polypodiaceae) and its systematic implications. Taxon. 72(5). 974–1018. 3 indexed citations

Balick, Michael J., et al.. (2023). Calendar Plants in Southern Vanuatu. Economic Botany. 77(3). 227–242. 3 indexed citations

Hennequin, Sabine, et al.. (2022). Origin of Hawaiian ferns of the genus Ctenitis (Dryopteridaceae). Botany Letters. 169(3). 375–389.

Ebihara, Atsushi, et al.. (2022). Reticulate evolution in the Pteris fauriei group (Pteridaceae). Scientific Reports. 12(1). 9145–9145. 3 indexed citations

Gaudeul, Myriam, Michael Sundue, Barbara S. Parris, et al.. (2017). Madagascar sheds new light on the molecular systematics and biogeography of grammitid ferns: New unexpected lineages and numerous long-distance dispersal events. Molecular Phylogenetics and Evolution. 111. 1–17. 28 indexed citations

Ranker, Tom A. & Michael Sundue. (2015). Why are there so few species of ferns?. Trends in Plant Science. 20(7). 402–403. 16 indexed citations

Ranker, Tom A., et al.. (2013). Ecological factors influencing growth of the endangered Hawaiian fern Marsilea villosa (Marsileaceae) and implications for conservation management. American Journal of Botany. 100(8). 1532–1543. 8 indexed citations

Ranker, Tom A., Michael Sundue, Paulo H. Labiak, Barbara S. Parris, & Germinal Rouhan. (2010). New insights into the phylogeny and historical biogeography of the Lellingeria myosuroides clade (Polypodiaceae). PLoS Currents. 2. RRN1197–RRN1197. 6 indexed citations

10.

Ranker, Tom A., et al.. (2008). Biology and Evolution of Ferns and Lycophytes. Cambridge University Press eBooks. 142 indexed citations

11.

Ranker, Tom A., et al.. (2008). Mitochondrial DNA evolution in the Anaxyrus boreas species group. Molecular Phylogenetics and Evolution. 50(2). 209–225. 40 indexed citations

12.

Ranker, Tom A., et al.. (2008). Evolutionary history and phylogeography of Encelia farinosa (Asteraceae) from the Sonoran, Mojave, and Peninsular Deserts. Molecular Phylogenetics and Evolution. 50(2). 326–335. 48 indexed citations

13.

Ranker, Tom A., et al.. (2005). New Records of Lycophytes and Ferns from Moorea, French Polynesia. American Fern Journal. 95(3). 126–127. 5 indexed citations

14.

Ranker, Tom A., et al.. (2004). Molecular phylogenetics and historical biogeography of Hawaiian Dryopteris (Dryopteridaceae). Molecular Phylogenetics and Evolution. 34(2). 392–407. 57 indexed citations

15.

Haufler, Christopher H., et al.. (2003). Systematics of the Ant-Fern Genus Lecanopteris (Polypodiaceae): Testing Phylogenetic Hypotheses with DNA Sequences. Systematic Botany. 28(2). 217–227. 38 indexed citations

16.

Schneider, Harald, et al.. (2003). Unraveling the phylogeny of polygrammoid ferns (Polypodiaceae and Grammitidaceae): exploring aspects of the diversification of epiphytic plants. Molecular Phylogenetics and Evolution. 31(3). 1041–1063. 172 indexed citations

17.

Ranker, Tom A.. (1995). DNA Sequence Data in Phylogeny Reconstruction: An Overview of Techniques and Analyses. American Fern Journal. 85(4). 123–123. 1 indexed citations

18.

Ranker, Tom A., et al.. (1994). Multiple Colonizations of Asplenium adiantum-nigrum Onto the Hawaiian Archipelago. Evolution. 48(4). 1364–1364. 15 indexed citations

19.

Ranker, Tom A.. (1991). Natural selection and the plastid genome of parasitic angiosperms. Trends in Ecology & Evolution. 6(7). 205–205. 1 indexed citations

20.

Soltis, Douglas E., et al.. (1989). Chloroplast DNA variation in a wild plant, tolmiea menziesii.. Genetics. 121(4). 819–826. 78 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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