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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Ecology and Evolution 34 7708 7457 2584 2477 109 3683

Christian A. Hagen publications per year

The chart shows the history of publications by Christian A. Hagen between 1998 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Christian A. Hagen published across 28 years, from 1998 to 2025, averaging 5 papers a year. Output peaked at 15 publications in 2019. 14 of the 140 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1998 to 2025. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 2019. 1998: 1 publication 1999: 0 publications 2000: 0 publications 2001: 1 publication 2002: 2 publications 2003: 3 publications 2004: 2 publications 2005: 7 publications 2006: 4 publications 2007: 5 publications 2008: 1 publication 2009: 1 publication 2010: 2 publications 2011: 4 publications 2012: 2 publications 2013: 2 publications 2014: 4 publications 2015: 3 publications 2016: 11 publications 2017: 14 publications 2018: 9 publications 2019: 15 publications 2020: 7 publications 2021: 14 publications 2022: 10 publications 2023: 2 publications 2024: 11 publications 2025: 3 publications
1998 2025

140 publications in total across all disciplines

View publications per year as a table
Christian A. Hagen: publications per year, 1998 to 2025
Year Publications
1998 1
1999 0
2000 0
2001 1
2002 2
2003 3
2004 2
2005 7
2006 4
2007 5
2008 1
2009 1
2010 2
2011 4
2012 2
2013 2
2014 4
2015 3
2016 11
2017 14
2018 9
2019 15
2020 7
2021 14
2022 10
2023 2
2024 11
2025 3
Total 140
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Christian A. Hagen publication distribution in Ecology and Evolution in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Ecology and Evolution in 2026. The highlighted bar marks where Christian A. Hagen sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 100 bars. Horizontal axis: publications, 37–41 to 531+. Vertical axis: number of scientists, 0 to 333. Most scientists, 333, have 97–101 publications. The last bar groups every scientist with 531 publications or more. The highlighted bar, 107–111 publications, is where this scientist sits. 37–41 publications: 2 scientists 42–46 publications: 9 scientists 47–51 publications: 10 scientists 52–56 publications: 31 scientists 57–61 publications: 56 scientists 62–66 publications: 91 scientists 67–71 publications: 92 scientists 72–76 publications: 127 scientists 77–81 publications: 173 scientists 82–86 publications: 236 scientists 87–91 publications: 227 scientists 92–96 publications: 240 scientists 97–101 publications: 333 scientists 102–106 publications: 280 scientists 107–111 publications: 300 scientists 112–116 publications: 285 scientists 117–121 publications: 305 scientists 122–126 publications: 287 scientists 127–131 publications: 278 scientists 132–136 publications: 289 scientists 137–141 publications: 273 scientists 142–146 publications: 262 scientists 147–151 publications: 246 scientists 152–156 publications: 235 scientists 157–161 publications: 205 scientists 162–166 publications: 199 scientists 167–171 publications: 174 scientists 172–176 publications: 164 scientists 177–181 publications: 173 scientists 182–186 publications: 189 scientists 187–191 publications: 170 scientists 192–196 publications: 139 scientists 197–201 publications: 128 scientists 202–206 publications: 117 scientists 207–211 publications: 115 scientists 212–216 publications: 107 scientists 217–221 publications: 124 scientists 222–226 publications: 81 scientists 227–231 publications: 82 scientists 232–236 publications: 85 scientists 237–241 publications: 75 scientists 242–246 publications: 66 scientists 247–251 publications: 81 scientists 252–256 publications: 69 scientists 257–261 publications: 70 scientists 262–266 publications: 55 scientists 267–271 publications: 64 scientists 272–276 publications: 49 scientists 277–281 publications: 48 scientists 282–286 publications: 44 scientists 287–291 publications: 45 scientists 292–296 publications: 36 scientists 297–301 publications: 39 scientists 302–306 publications: 38 scientists 307–311 publications: 30 scientists 312–316 publications: 34 scientists 317–321 publications: 25 scientists 322–326 publications: 22 scientists 327–331 publications: 28 scientists 332–336 publications: 30 scientists 337–341 publications: 22 scientists 342–346 publications: 30 scientists 347–351 publications: 26 scientists 352–356 publications: 22 scientists 357–361 publications: 29 scientists 362–366 publications: 21 scientists 367–371 publications: 12 scientists 372–376 publications: 18 scientists 377–381 publications: 17 scientists 382–386 publications: 13 scientists 387–391 publications: 21 scientists 392–396 publications: 13 scientists 397–401 publications: 10 scientists 402–406 publications: 15 scientists 407–411 publications: 8 scientists 412–416 publications: 9 scientists 417–421 publications: 8 scientists 422–426 publications: 4 scientists 427–431 publications: 10 scientists 432–436 publications: 10 scientists 437–441 publications: 5 scientists 442–446 publications: 4 scientists 447–451 publications: 10 scientists 452–456 publications: 2 scientists 457–461 publications: 4 scientists 462–466 publications: 7 scientists 467–471 publications: 7 scientists 472–476 publications: 6 scientists 477–481 publications: 6 scientists 482–486 publications: 3 scientists 487–491 publications: 3 scientists 492–496 publications: 4 scientists 497–501 publications: 4 scientists 502–506 publications: 8 scientists 507–511 publications: 5 scientists 512–516 publications: 4 scientists 517–521 publications: 5 scientists 522–526 publications: 4 scientists 527–530 publications: 5 scientists 531+ publications: 100 scientists
37–41 publications 531+

This scientist: 109 publications — 25th percentile

25% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 531 publications or more.

View publications distribution as a table
Number of Ecology and Evolution scientists by publication count, Research.com 2026 ranking edition. Based on 8,381 ranked scientists.
Publications Scientists This scientist
37–41 2
42–46 9
47–51 10
52–56 31
57–61 56
62–66 91
67–71 92
72–76 127
77–81 173
82–86 236
87–91 227
92–96 240
97–101 333
102–106 280
107–111 300 109
112–116 285
117–121 305
122–126 287
127–131 278
132–136 289
137–141 273
142–146 262
147–151 246
152–156 235
157–161 205
162–166 199
167–171 174
172–176 164
177–181 173
182–186 189
187–191 170
192–196 139
197–201 128
202–206 117
207–211 115
212–216 107
217–221 124
222–226 81
227–231 82
232–236 85
237–241 75
242–246 66
247–251 81
252–256 69
257–261 70
262–266 55
267–271 64
272–276 49
277–281 48
282–286 44
287–291 45
292–296 36
297–301 39
302–306 38
307–311 30
312–316 34
317–321 25
322–326 22
327–331 28
332–336 30
337–341 22
342–346 30
347–351 26
352–356 22
357–361 29
362–366 21
367–371 12
372–376 18
377–381 17
382–386 13
387–391 21
392–396 13
397–401 10
402–406 15
407–411 8
412–416 9
417–421 8
422–426 4
427–431 10
432–436 10
437–441 5
442–446 4
447–451 10
452–456 2
457–461 4
462–466 7
467–471 7
472–476 6
477–481 6
482–486 3
487–491 3
492–496 4
497–501 4
502–506 8
507–511 5
512–516 4
517–521 5
522–526 4
527–530 5
531+ 100
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Christian A. Hagen D-index placement in Ecology and Evolution in 2026

The chart shows the D-index (discipline H-index) distribution of Ecology and Evolution scientists ranked by Research.com in 2026. The highlighted bar marks where Christian A. Hagen sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 92 bars. Horizontal axis: D-Index, 30 to 121+. Vertical axis: number of scientists, 0 to 280. Most scientists, 280, have 40 D-Index. The last bar groups every scientist with 121 D-Index or more. The highlighted bar, 34 D-Index, is where this scientist sits. 30 D-Index: 95 scientists 31 D-Index: 123 scientists 32 D-Index: 191 scientists 33 D-Index: 245 scientists 34 D-Index: 252 scientists 35 D-Index: 244 scientists 36 D-Index: 249 scientists 37 D-Index: 244 scientists 38 D-Index: 254 scientists 39 D-Index: 254 scientists 40 D-Index: 280 scientists 41 D-Index: 274 scientists 42 D-Index: 266 scientists 43 D-Index: 233 scientists 44 D-Index: 248 scientists 45 D-Index: 208 scientists 46 D-Index: 201 scientists 47 D-Index: 213 scientists 48 D-Index: 207 scientists 49 D-Index: 172 scientists 50 D-Index: 209 scientists 51 D-Index: 199 scientists 52 D-Index: 153 scientists 53 D-Index: 169 scientists 54 D-Index: 163 scientists 55 D-Index: 148 scientists 56 D-Index: 120 scientists 57 D-Index: 146 scientists 58 D-Index: 137 scientists 59 D-Index: 140 scientists 60 D-Index: 104 scientists 61 D-Index: 119 scientists 62 D-Index: 118 scientists 63 D-Index: 99 scientists 64 D-Index: 77 scientists 65 D-Index: 100 scientists 66 D-Index: 86 scientists 67 D-Index: 83 scientists 68 D-Index: 75 scientists 69 D-Index: 94 scientists 70 D-Index: 57 scientists 71 D-Index: 68 scientists 72 D-Index: 59 scientists 73 D-Index: 63 scientists 74 D-Index: 66 scientists 75 D-Index: 60 scientists 76 D-Index: 42 scientists 77 D-Index: 49 scientists 78 D-Index: 39 scientists 79 D-Index: 37 scientists 80 D-Index: 43 scientists 81 D-Index: 41 scientists 82 D-Index: 45 scientists 83 D-Index: 34 scientists 84 D-Index: 40 scientists 85 D-Index: 35 scientists 86 D-Index: 55 scientists 87 D-Index: 24 scientists 88 D-Index: 24 scientists 89 D-Index: 30 scientists 90 D-Index: 23 scientists 91 D-Index: 25 scientists 92 D-Index: 27 scientists 93 D-Index: 27 scientists 94 D-Index: 13 scientists 95 D-Index: 23 scientists 96 D-Index: 12 scientists 97 D-Index: 14 scientists 98 D-Index: 19 scientists 99 D-Index: 16 scientists 100 D-Index: 14 scientists 101 D-Index: 5 scientists 102 D-Index: 21 scientists 103 D-Index: 16 scientists 104 D-Index: 10 scientists 105 D-Index: 7 scientists 106 D-Index: 7 scientists 107 D-Index: 7 scientists 108 D-Index: 6 scientists 109 D-Index: 9 scientists 110 D-Index: 11 scientists 111 D-Index: 12 scientists 112 D-Index: 9 scientists 113 D-Index: 7 scientists 114 D-Index: 3 scientists 115 D-Index: 8 scientists 116 D-Index: 5 scientists 117 D-Index: 11 scientists 118 D-Index: 4 scientists 119 D-Index: 2 scientists 120 D-Index: 5 scientists 121+ D-Index: 100 scientists
30 D-Index 121+

This scientist: 34 D-Index — 11th percentile

11% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 121 D-Index or more.

View D-Index distribution as a table
Number of Ecology and Evolution scientists by D-index, Research.com 2026 ranking edition. Based on 8,381 ranked scientists.
D-Index Scientists This scientist
30 95
31 123
32 191
33 245
34 252 34
35 244
36 249
37 244
38 254
39 254
40 280
41 274
42 266
43 233
44 248
45 208
46 201
47 213
48 207
49 172
50 209
51 199
52 153
53 169
54 163
55 148
56 120
57 146
58 137
59 140
60 104
61 119
62 118
63 99
64 77
65 100
66 86
67 83
68 75
69 94
70 57
71 68
72 59
73 63
74 66
75 60
76 42
77 49
78 39
79 37
80 43
81 41
82 45
83 34
84 40
85 35
86 55
87 24
88 24
89 30
90 23
91 25
92 27
93 27
94 13
95 23
96 12
97 14
98 19
99 16
100 14
101 5
102 21
103 16
104 10
105 7
106 7
107 7
108 6
109 9
110 11
111 12
112 9
113 7
114 3
115 8
116 5
117 11
118 4
119 2
120 5
121+ 100
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Overview

Christian A. Hagen is affiliated with Oregon State University in the United States. Their work primarily focuses on Environmental Science with a significant emphasis on Ecology, covering a range of related subfields such as Global and Planetary Change, Nature and Landscape Conservation, Environmental Chemistry, and Ecological Modeling.

The researcher's scholarly contributions span various aspects of wildlife and ecosystem dynamics. Their topics of study include:

  • Rangeland and Wildlife Management
  • Fire effects on ecosystems
  • Wildlife Ecology and Conservation
  • Ecology and Vegetation Dynamics Studies
  • Turfgrass Adaptation and Management
  • Species Distribution and Climate Change
  • Animal Ecology and Behavior Studies

Christian A. Hagen has published in several frequent venues, illustrating an active presence in ecological research communities. These include:

  • Journal of Wildlife Management
  • Ecology and Evolution
  • Global Ecology and Conservation
  • Conservation Biology
  • Ecosphere

Key recent papers authored by or involving Christian A. Hagen are as follows:

  • "Testing a global standard for quantifying species recovery and assessing conservation impact" (2021), Conservation Biology
  • "Reversing tree expansion in sagebrush steppe yields population-level benefit for imperiled grouse" (2021), Ecosphere
  • "Are Sage-Grouse Fine-Scale Specialists or Shrub-Steppe Generalists?" (2020), Journal of Wildlife Management
  • "Reversing Tree Encroachment Increases Usable Space for Sage-Grouse during the Breeding Season" (2021), Wildlife Society Bulletin
  • "Acute and lagged fitness consequences for a sagebrush obligate in a post mega-wildfire landscape" (2021), Ecology and Evolution

The scientist collaborates frequently with several peers in their field. Frequent coauthors include:

  • David A. Haukos
  • David E. Naugle
  • Christopher R. Anthony
  • Katie M. Dugger
  • David C. Pavlacky

Best Publications

  • Saving sage-grouse from the trees: A proactive solution to reducing a key threat to a candidate species

    Sharon Baruch-Mordo;Jeffrey S. Evans;Jeffrey S. Evans;John P. Severson;David E. Naugle;David E. Naugle

  • A Meta-analysis of Greater Sage-grouse Centrocercus urophasianus Nesting and Brood-rearing Habitats

    Christian A. Hagen;John W. Connelly;Michael A. Schroeder

  • LOCATION AND SUCCESS OF LESSER PRAIRIE-CHICKEN NESTS IN RELATION TO VEGETATION AND HUMAN DISTURBANCE

    James C. Pitman;Christian A. Hagen;Robert J. Robel;Thomas M. Loughin

  • Wildfire, climate, and invasive grass interactions negatively impact an indicator species by reshaping sagebrush ecosystems

    Peter S. Coates;Mark A. Ricca;Brian G. Prochazka;Matthew L. Brooks

  • Guidelines for managing lesser prairie-chicken populations and their habitats

    Christian A. Hagen;Brent E. Jamison;Kenneth M. Giesen;Terry Z. Riley

  • Characteristics and Dynamics of Greater Sage-Grouse Populations

    John W. Connelly;Christian A. Hagen;Michael A. Schroeder

  • Testing a global standard for quantifying species recovery and assessing conservation impact

    Molly K. Grace;Molly K. Grace;H. Resit Akçakaya;H. Resit Akçakaya;Elizabeth L. Bennett;Thomas M. Brooks;Thomas M. Brooks

  • Age-Specific Survival and Probable Causes of Mortality in Female Lesser Prairie-Chickens

    Christian A. Hagen;James C. Pitman;Brett K. Sandercock;Robert J. Robel

  • Public lands and private waters: scarce mesic resources structure land tenure and sage‐grouse distributions

    J. P. Donnelly;D. E. Naugle;C. A. Hagen;J. D. Maestas

  • Spatial Variation in Lesser Prairie-Chicken Demography: A Sensitivity Analysis of Population Dynamics and Management Alternatives

    Christian A. Hagen;Brett K. Sandercock;James C. Pitman;Robert J. Robel

  • Range-wide population size of the lesser prairie-chicken: 2012 and 2013

    Lyman McDonald;Grant Beauprez;Grant Gardner;Jim Griswold

  • Lesser prairie-chicken brood habitat in sand sagebrush: invertebrate biomass and vegetation

    Christian A. Hagen;G. Curran Salter;James C. Pitman;Robert J. Robel

  • NESTING ECOLOGY OF LESSER PRAIRIE-CHICKENS IN SAND SAGEBRUSH PRAIRIE OF SOUTHWESTERN KANSAS

    James C. Pitman;Christian A. Hagen;Brent E. Jamison;Robert J. Robel

  • Lesser Prairie-Chicken Avoidance of Trees in a Grassland Landscape☆

    Joseph M. Lautenbach;Reid T. Plumb;Samantha G. Robinson;Christian A. Hagen

  • Lesser Prairie-Chicken (Tympanuchus pallidicinctus)

    Kenneth M. Giesen;A. Poole;F. Gill

  • Age-specific variation in apparent survival rates of male lesser-prairie-chickens

    Christian A. Hagen;James C. Pitman;Brett K. Sandercock;Robert J. Robel

  • Mapping Tree Canopy Cover in Support of Proactive Prairie Grouse Conservation in Western North America

    Michael J. Falkowski;Jeffrey S. Evans;Jeffrey S. Evans;David E. Naugle;Christian A. Hagen

  • Factors affecting female space use in ten populations of prairie chickens

    Virginia L. Winder;Kaylan M. Carrlson;Andrew J. Gregory;Christian A. Hagen

  • Short-Term Response of Sage-Grouse Nesting to Conifer Removal in the Northern Great Basin

    John P. Severson;Christian A. Hagen;Jeremy D. Maestas;David E. Naugle

  • Special Issue: Targeted Woodland Removal to Recover at-Risk Grouse and Their Sagebrush-Steppe and Prairie Ecosystems

    Richard F. Miller;David E. Naugle;Jeremy D. Maestas;Christian A. Hagen

  • Conservation of greater sage-grouse- a synthesis of current trends and future management

    John W. Connelly;Steven T. Knick;Clait E. Braun;William L. Baker

Frequent Co-Authors

David A. Haukos
David A. Haukos Kansas State University
David E. Naugle
David E. Naugle University of Montana
Brett K. Sandercock
Brett K. Sandercock Kansas State University
Kerry P. Reese
Kerry P. Reese University of Idaho
Michael J. Falkowski
Michael J. Falkowski Colorado State University
Jeffrey S. Evans
Jeffrey S. Evans The Nature Conservancy
Brady W. Allred
Brady W. Allred University of Montana
Edward O. Garton
Edward O. Garton University of Idaho
David A. Keith
David A. Keith University of New South Wales
John R. Skalski
John R. Skalski University of Washington

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