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.
BUTTERFLIES AND PLANTS: A STUDY IN COEVOLUTION
19642.8k citationsPaul R. Ehrlich, Peter H. Ravenprofile →
Countries citing papers authored by Paul R. Ehrlich
Since
Specialization
Citations
This map shows the geographic impact of Paul R. Ehrlich'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 Paul R. Ehrlich with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Paul R. Ehrlich more than expected).
This network shows the impact of papers produced by Paul R. Ehrlich. 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 Paul R. Ehrlich. The network helps show where Paul R. Ehrlich may publish in the future.
Co-authorship network of co-authors of Paul R. Ehrlich
This figure shows the co-authorship network connecting the top 25 collaborators of Paul R. Ehrlich.
A scholar is included among the top collaborators of Paul R. Ehrlich 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 Paul R. Ehrlich. Paul R. Ehrlich is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ceballos, Gerardo, Paul R. Ehrlich, & Rodolfo Dirzo. (2017). Biological annihilation via the ongoing sixth mass extinction signaled by vertebrate population losses and declines. Proceedings of the National Academy of Sciences. 114(30). E6089–E6096.1487 indexed citations breakdown →
Ricketts, Taylor H., Gretchen C. Daily, Paul R. Ehrlich, & Charles D. Michener. (2004). Economic value of tropical forest to coffee production. Proceedings of the National Academy of Sciences. 101(34). 12579–12582.521 indexed citations breakdown →
9.
Arrow, Kenneth J., Partha Dasgupta, Lawrence H. Goulder, et al.. (2004). Are We Consuming Too Much?. The Journal of Economic Perspectives. 18(3). 147–172.513 indexed citations breakdown →
10.
Şekercioḡlu, Çaḡan H., Gretchen C. Daily, & Paul R. Ehrlich. (2004). Ecosystem consequences of bird declines. Proceedings of the National Academy of Sciences. 101(52). 18042–18047.661 indexed citations breakdown →
11.
Arrow, Kenneth J., Partha Dasgupta, Lawrence H. Goulder, et al.. (2004). Are We Consuming Too Much. SSRN Electronic Journal.35 indexed citations
12.
Horner‐Devine, M. Claire, Gretchen C. Daily, Paul R. Ehrlich, & Carol L. Boggs. (2003). Countryside Biogeography of Tropical Butterflies. Conservation Biology. 17(1). 168–177.123 indexed citations
13.
Heal, Geoffrey, Brian Walker, Simon A. Levin, et al.. (2003). Genetic Diversity and Interdependent Crop Choices in Agriculture. SSRN Electronic Journal.3 indexed citations
14.
Ehrlich, Paul R. & Gerardo Ceballos. (1997). Población y medio ambiente: ¿qué nos espera?. 48(4). 19–30.3 indexed citations
15.
Haddad, Nick M., et al.. (1996). Annotated checklist of the butterflies of the Tikal National Park Area of Guatemala.. Tropical lepidoptera research. 7(1). 21–37.16 indexed citations
Murphy, Dennis D. & Paul R. Ehrlich. (1981). Two California checkerspot butterfly subspeciesc one newc one on the verge of extinction. Journal of The Lepidopterists Society. 34. 316–320.10 indexed citations
Ehrlich, Paul R.. (1952). The distribution and subspeciation of Erebia rossi Curtis. Transactions of the American Entomological Society. 78(2). 75–88.1 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.