World's Best Scientists 2026 revealed!
Randall K. Kolka

Randall K. Kolka

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Ecology and Evolution 50 3883 3743 1356 1294 248 8509

Randall K. Kolka publications per year

The chart shows the history of publications by Randall K. Kolka between 1994 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Randall K. Kolka published across 32 years, from 1994 to 2025, averaging 8.8 papers a year. Output peaked at 20 publications in 2022. 17 of the 283 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1994 to 2025. Vertical axis: number of publications, 0 to 20. Peak 20 publications in 2022. 1994: 1 publication 1995: 0 publications 1996: 0 publications 1997: 2 publications 1998: 5 publications 1999: 5 publications 2000: 4 publications 2001: 1 publication 2002: 0 publications 2003: 2 publications 2004: 4 publications 2005: 2 publications 2006: 3 publications 2007: 3 publications 2008: 15 publications 2009: 12 publications 2010: 11 publications 2011: 14 publications 2012: 15 publications 2013: 11 publications 2014: 18 publications 2015: 14 publications 2016: 16 publications 2017: 14 publications 2018: 13 publications 2019: 16 publications 2020: 14 publications 2021: 18 publications 2022: 20 publications 2023: 13 publications 2024: 10 publications 2025: 7 publications
1994 2025

283 publications in total across all disciplines

View publications per year as a table
Randall K. Kolka: publications per year, 1994 to 2025
Year Publications
1994 1
1995 0
1996 0
1997 2
1998 5
1999 5
2000 4
2001 1
2002 0
2003 2
2004 4
2005 2
2006 3
2007 3
2008 15
2009 12
2010 11
2011 14
2012 15
2013 11
2014 18
2015 14
2016 16
2017 14
2018 13
2019 16
2020 14
2021 18
2022 20
2023 13
2024 10
2025 7
Total 283
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Randall K. Kolka 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 Randall K. Kolka 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, 247–251 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: 248 publications — 85th percentile

85% 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
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 81 248
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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Randall K. Kolka 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 Randall K. Kolka 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, 50 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: 50 D-Index — 56th percentile

56% 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
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 50
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

Randall K. Kolka is affiliated with the US Forest Service in the United States. Their research primarily focuses on environmental science, with significant contributions across related subfields such as ecology, global and planetary change, plant science, atmospheric science, and toxicology. The ecological dimension of their work is notable, with approximately half of their publications falling under this subfield.

Their research covers a range of topics that include peatlands and wetlands ecology, coastal wetland ecosystem dynamics, fire effects on ecosystems, botany and plant ecology studies, mercury impact and mitigation, soil erosion and sediment transport, and climate change effects on permafrost. This wide topical scope signals comprehensive expertise in ecosystem processes and environmental interactions.

They have published regularly in several recurring venues, which include:

  • Forest Service Research Data Archive
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)
  • Zenodo (CERN European Organization for Nuclear Research)
  • Agricultural and Forest Meteorology
  • Journal of Geophysical Research Biogeosciences

Recent publications of Randall K. Kolka consist of multiple peer-reviewed papers addressing various aspects of ecosystem carbon dynamics, soil metabolomes, and hydrometeorological influences on peatlands. Some of these works are:

  • "Rapid Net Carbon Loss From a Whole-Ecosystem Warmed Peatland," 2020, published in AGU Advances
  • "Soil metabolome response to whole-ecosystem warming at the Spruce and Peatland Responses under Changing Environments experiment," 2021, published in Proceedings of the National Academy of Sciences
  • "Warming response of peatland CO2 sink is sensitive to seasonality in warming trends," 2022, published in Nature Climate Change
  • "Hydrometeorological sensitivities of net ecosystem carbon dioxide and methane exchange of an Amazonian palm swamp peatland," 2020, published in Agricultural and Forest Meteorology
  • "Upscaling Wetland Methane Emissions From the FLUXNET-CH4 Eddy Covariance Network (UpCH4 v1.0): Model Development, Network Assessment, and Budget Comparison," 2023, published in AGU Advances

Their body of work includes numerous collaborations, with frequent co-authors being Stephen D. Sebestyen, D. Tyler Roman, Evan S. Kane, Erik A. Lilleskov, and Rodney A. Chimner. These collaborations indicate a networked approach to research within environmental and ecological sciences.

Best Publications

  • Accelerated microbial turnover but constant growth efficiency with warming in soil

    Shannon B. Hagerty;Kees Jan van Groenigen;Steven D. Allison;Bruce A. Hungate

  • Prairie strips improve biodiversity and the delivery of multiple ecosystem services from corn–soybean croplands

    Lisa A. Schulte;Jarad Niemi;Matthew J. Helmers;Matt Liebman

  • Stability of peatland carbon to rising temperatures

    Rachel Wilson;Anya Hopple;Malak Tfaily;Stephen Sebestyen

  • Spatial characteristics of net methylmercury production hot spots in peatlands

    Carl P.J. Mitchell;Brian A. Branfireun;Randall K. Kolka

  • Distribution and Uptake Dynamics of Mercury in Leaves of Common Deciduous Tree Species in Minnesota, U.S.A.

    Aicam Laacouri;Edward A. Nater;Randall K. Kolka

  • Soil carbon storage estimation in a forested watershed using quantitative soil-landscape modeling.

    James A. Thompson;Randall K. Kolka

  • Regional annual water yield from forest lands and its response to potential deforestation across the southeastern United States

    Ge Sun;Steve G. McNulty;J. Lu;Devendra M. Amatya

  • Temperature and vegetation effects on soil organic carbon quality along a forested mean annual temperature gradient in North America

    Cinzia Fissore;Christian P. Giardina;Randall K. Kolka;Carl C. Trettin

  • Ecoenzymatic stoichiometry and microbial processing of organic matter in northern bogs and fens reveals a common P-limitation between peatland types

    Brian H Hill;Colleen M. Elonen;Terri M. Jicha;Randall K. Kolka

  • An appraisal of Indonesia’s immense peat carbon stock using national peatland maps: uncertainties and potential losses from conversion

    Matthew Warren;Kristell Hergoualc’h;J. Boone Kauffman;J. Boone Kauffman;Daniel Murdiyarso;Daniel Murdiyarso

  • Litterfall mercury dry deposition in the eastern USA.

    Martin R. Risch;John F. DeWild;David P. Krabbenhoft;Randall K. Kolka

  • Atmospheric Inputs of Mercury and Organic Carbon into a Forested Upland/Bog Watershed

    Randall K. Kolka;E.A. Nater;D.F. Grigal;E.S. Verry

  • Assessing sulfate and carbon controls on net methylmercury production in peatlands: An in situ mesocosm approach

    Carl P.J. Mitchell;Brian A. Branfireun;Randall K. Kolka

  • Long-term management impacts on carbon storage in Lake States forests

    Matthew Powers;Matthew Powers;Randall Kolka;Brian Palik;Rachel McDonald

  • Nutrient removal by prairie filter strips in agricultural landscapes

    Xiaobo Zhou;Matthew J. Helmers;Heidi Asbjornsen;Randall K. Kolka

  • Long-Term Monitoring Sites and Trends at the Marcell Experimental Forest

    Stephen D. Sebestyen;Carrie Dorrance;Donna M. Olson;Elon S. Verry

  • Mercury and Organic Carbon Relationships in Streams Draining Forested Upland/Peatland Watersheds

    Randall K. Kolka;D.F. Grigal;E.S. Verry;E.A. Nater

  • Interannual, seasonal, and retrospective analysis of the methane and carbon dioxide budgets of a temperate peatland

    D. M. Olson;T. J. Griffis;A. Noormets;R. Kolka

  • The response of boreal peatland community composition and NDVI to hydrologic change, warming, and elevated carbon dioxide.

    Mara Y. McPartland;Evan S. Kane;Evan S. Kane;Michael J. Falkowski;Randy Kolka

  • Melanin mitigates the accelerated decay of mycorrhizal necromass with peatland warming

    Christopher W. Fernandez;Katherine Heckman;Randall Kolka;Peter G. Kennedy

  • Landscape-level terrestrial methane flux observed from a very tall tower

    Ankur R. Desai;Ke Xu;Hanqin Tian;Peter Weishampel

Frequent Co-Authors

Stephen D. Sebestyen
Stephen D. Sebestyen US Forest Service
Edward A. Nater
Edward A. Nater University of Minnesota
Thomas G. Pypker
Thomas G. Pypker Thompson Rivers University
Evan S. Kane
Evan S. Kane Michigan Technological University
John B. Bradford
John B. Bradford United States Geological Survey
Carl P. J. Mitchell
Carl P. J. Mitchell University of Toronto
Brian J. Palik
Brian J. Palik US Forest Service
Heidi Asbjornsen
Heidi Asbjornsen University of New Hampshire
Paul J. Hanson
Paul J. Hanson Oak Ridge National Laboratory
Michael G. Ryan
Michael G. Ryan Colorado State University

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