John M. Hagan

2.2k total citations · 1 hit paper
36 papers, 1.8k citations indexed

About

John M. Hagan is a scholar working on Nature and Landscape Conservation, Ecology and Global and Planetary Change. According to data from OpenAlex, John M. Hagan has authored 36 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Nature and Landscape Conservation, 19 papers in Ecology and 19 papers in Global and Planetary Change. Recurrent topics in John M. Hagan's work include Ecology and Vegetation Dynamics Studies (12 papers), Forest Management and Policy (11 papers) and Avian ecology and behavior (10 papers). John M. Hagan is often cited by papers focused on Ecology and Vegetation Dynamics Studies (12 papers), Forest Management and Policy (11 papers) and Avian ecology and behavior (10 papers). John M. Hagan collaborates with scholars based in United States, Canada and Egypt. John M. Hagan's co-authors include David W. Johnston, Andrew A. Whitman, Peter S. McKinley, W. Matthew Vander Haegen, Nicholas Brokaw, John Gunn, J. Michael Reed, Trevor L. Lloyd-Evans, Lloyd C. Irland and Jonathan L. Atwood and has published in prestigious journals such as Conservation Biology, Canadian Journal of Fisheries and Aquatic Sciences and Forest Ecology and Management.

In The Last Decade

John M. Hagan

34 papers receiving 1.5k 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.

Ecology and conservation of neotropical migrant landbirds

1992 514 citations John M. Hagan, David W. Johnston profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
John M. Hagan United States	20	1.3k	845	624	292	279	36	1.8k
Kringen Henein Canada	6	1.8k 1.4×	836 1.0×	757 1.2×	253 0.9×	278 1.0×	7	2.2k
David Freudenberger Australia	22	870 0.7×	859 1.0×	601 1.0×	213 0.7×	218 0.8×	65	1.7k
J. Verboom Netherlands	21	1.1k 0.9×	876 1.0×	702 1.1×	303 1.0×	496 1.8×	53	1.9k
Scott M. Pearson United States	24	881 0.7×	942 1.1×	731 1.2×	440 1.5×	262 0.9×	49	1.9k
Pere Pons Spain	23	953 0.7×	814 1.0×	726 1.2×	401 1.4×	378 1.4×	65	1.7k
Larry D. Harris United States	14	1.3k 1.0×	1.1k 1.3×	917 1.5×	328 1.1×	311 1.1×	27	2.2k
Jayme Augusto Prevedello Brazil	18	1.0k 0.8×	815 1.0×	625 1.0×	459 1.6×	321 1.2×	51	1.8k
Margaret H. Friedel Australia	25	1.3k 1.0×	1.1k 1.3×	572 0.9×	330 1.1×	197 0.7×	70	2.2k
T. Bently Wigley United States	28	1.3k 1.1×	975 1.2×	1.2k 1.9×	339 1.2×	320 1.1×	97	2.3k
Patricia L. Kennedy United States	24	1.7k 1.3×	780 0.9×	901 1.4×	434 1.5×	210 0.8×	89	2.2k

Countries citing papers authored by John M. Hagan

Since Specialization

Citations

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

Fields of papers citing papers by John M. Hagan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John M. Hagan. 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 John M. Hagan. The network helps show where John M. Hagan may publish in the future.

Co-authorship network of co-authors of John M. Hagan

This figure shows the co-authorship network connecting the top 25 collaborators of John M. Hagan. A scholar is included among the top collaborators of John M. Hagan 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 John M. Hagan. John M. Hagan 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

Gunn, John, et al.. (2012). Carbon Accounting for Woody Biomass from Massachusetts (USA) Managed Forests: A Framework for Determining the Temporal Impacts of Wood Biomass Energy on Atmospheric Greenhouse Gas Levels. Journal of Sustainable Forestry. 32(1-2). 130–158. 40 indexed citations

Hagan, John M., et al.. (2009). The effectiveness of different buffer widths for protecting water quality and macroinvertebrate and periphyton assemblages of headwater streams in Maine, USA. Canadian Journal of Fisheries and Aquatic Sciences. 67(1). 177–190. 19 indexed citations

Hagan, John M., et al.. (2008). FOREST CARBON OFFSETS: A Scorecard for Evaluating Project Quality. 4 indexed citations

Sampson, R. Neil, et al.. (2007). The Role for Sustainably Managed Forests in Climate Change Mitigation. Journal of Forestry. 105(6). 314–319. 60 indexed citations

Hagan, John M. & Andrew A. Whitman. (2007). Considerations in the Selection and Use of Indicators for Sustaining Forests. 1 indexed citations

Hagan, John M. & Andrew A. Whitman. (2006). Biodiversity Indicators for Sustainable Forestry: Simplifying Complexity. Journal of Forestry. 104(4). 203–210. 51 indexed citations

Hagan, John M., et al.. (2006). The Effectiveness of Different Buffer Widths for Protecting Headwater Stream Temperature in Maine. Forest Science. 52(3). 221–231. 73 indexed citations

Rimmer, Christopher C., Steven D. Faccio, Trevor L. Lloyd-Evans, & John M. Hagan. (2004). A Comparison of Constant-effort Mist Netting Results at a Coastal and Inland New England Site during Migration. Digital Commons - University of South Florida (University of South Florida). 6 indexed citations

Hagan, John M., et al.. (2002). The Effectiveness of Stand-Level and Landscape-Level Variables for Explaining Bird Occurrence in an Industrial Forest. Forest Science. 48(2). 231–242. 72 indexed citations

10.

Gunn, John & John M. Hagan. (2000). Woodpecker abundance and tree use in uneven-aged managed, and unmanaged, forest in northern Maine. Forest Ecology and Management. 126(1). 1–12. 42 indexed citations

11.

Hagan, John M., et al.. (1999). Coarse Woody Debris: Humans and Nature Competing for Trees. Journal of Forestry. 97(1). 6–11. 69 indexed citations

12.

Whitman, Andrew A., John M. Hagan, & Nicholas Brokaw. (1997). A Comparison of Two Bird Survey Techniques Used in a Subtropical Forest. Ornithological Applications. 99(4). 955–955. 67 indexed citations

13.

Hagan, John M.. (1995). Environmentalism and the Science of Conservation Biology. Conservation Biology. 9(5). 975–976. 5 indexed citations

14.

Hagan, John M. & David W. Johnston. (1992). Ecology and conservation of neotropical migrant landbirds. 514 indexed citations breakdown →

15.

Hagan, John M.. (1992). Conservation Biology When There is No Crisis ‐ Yet. Conservation Biology. 6(3). 475–476. 5 indexed citations

16.

Hagan, John M., et al.. (1991). Population Trends of Some Northeastern North American Landbirds: A Half-Century of Data. The Wilson Journal of Ornithology. 103(2). 165–182. 30 indexed citations

17.

Hagan, John M., Trevor L. Lloyd-Evans, & Jonathan L. Atwood. (1991). The Relationship between Latitude and the Timing of Spring Migration of North American Landbirds. Ornis Scandinavica. 22(2). 129–129. 50 indexed citations

18.

Harrington, Brian, et al.. (1988). Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus). The Auk. 105(3). 439–445. 45 indexed citations

19.

Hagan, John M.. (1986). Temporal Patterns in Pre-Fledgling Survival and Brood Reduction in an Osprey Colony. Ornithological Applications. 88(2). 200–200. 16 indexed citations

20.

Hagan, John M., Paul Smithson, & Phillip D. Doerr. (1983). Behavioral Response of the American Alligator to Freezing Weather. Journal of Herpetology. 17(4). 402–402. 16 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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