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Kai Ruohomäki

Kai Ruohomäki

University of Turku
Finland

D-Index & Metrics

Ecology and Evolution

D-Index
39
Citations
4528
World Ranking
6472
National Ranking
106

Kai Ruohomäki 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 Kai Ruohomäki sits on this spectrum.

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 publications 531+

This scientist: 85 publications — 9th percentile

9% of scientists in this discipline score the same or lower.

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

Kai Ruohomäki 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 Kai Ruohomäki sits on this spectrum.

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: 39 D-Index — 26th percentile

26% of scientists in this discipline score the same or lower.

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

Overview

Kai Ruohomäki is a researcher affiliated with the University of Turku in Finland, with a focus on environmental science and related disciplines. Their work spans key fields including Environmental Science, Agricultural and Biological Sciences, and Earth and Planetary Sciences.

Their research interests are reflected in their engagement with various subfields such as Ecology, Atmospheric Science, Nature and Landscape Conservation, Global and Planetary Change, and Insect Science.

Kai Ruohomäki's publications cover a diverse array of main topics, including:

  • Ecology and Vegetation Dynamics Studies
  • Forest Management and Policy
  • Forest Ecology and Biodiversity Studies
  • Plant and animal studies
  • Environmental DNA in Biodiversity Studies
  • Forest Insect Ecology and Management
  • Climate change and permafrost

Their recent papers demonstrate a sustained engagement with forest ecosystems, ecological dynamics, and biodiversity. These publications include:

  • Using long-term tree diversity experiments to explore the mechanisms of temporal shifts in forest ecosystem functioning, 2025, Oikos
  • A curated DNA barcode reference library for parasitoids of northern European cyclically outbreaking geometrid moths, 2022, Ecology and Evolution
  • Response of the Subarctic Mountain Birch Ecosystem to the Climate Warming in Northern Finland During the Last 40 Years, 2022, SSRN Electronic Journal

Collaboration is a notable element in their research activity. Frequent co-authors include Tommi Andersson, Julia Koricheva, Kasey E. Barton, Juri A. Felix, and Amy Cooper.

Publication venues where Kai Ruohomäki's work appears frequently are:

  • Oikos
  • Ecology and Evolution
  • SSRN Electronic Journal

Best Publications

  • Tree species diversity influences herbivore abundance and damage: meta-analysis of long-term forest experiments

    Harri Vehviläinen;Julia Koricheva;Kai Ruohomäki

  • Consequences of herbivory in the mountain birch (Betula pubescens ssp tortuosa): importance of the functional organization of the tree.

    Erkki Haukioja;Kai Ruohomäki;Josef Senn;Janne Suomela

  • Causes of cyclicity of Epirrita autumnata (Lepidoptera, Geometridae): grandiose theory and tedious practice

    Kai Ruohomäki;Miia Tanhuanpää;Matthew P. Ayres;Pekka Kaitaniemi

  • Realized fecundity in Epirrita autumnata (Lepidoptera: Geometridae): relation to body size and consequences to population dynamics

    Toomas Tammaru;Pekka Kaitaniemi;Kai Ruohomäki

  • Specialist and generalist natural enemies as an explanation for geographical gradients in population cycles of northern herbivores

    Tero Klemola;Miia Tanhuanpää;Erkki Korpimäki;Kai Ruohomäki

  • Delayed induced changes in the biochemical composition of host plant leaves during an insect outbreak

    Pekka Kaitaniemi;Kai Ruohomäki;Vladimir Ossipov;Erkki Haukioja

  • Crowdsourcing-based nationwide tick collection reveals the distribution of Ixodes ricinus and I. persulcatus and associated pathogens in Finland

    Maija Laaksonen;Eeva Sajanti;Jani J Sormunen;Ritva Penttinen

  • Diversification of tree stands as a means to manage pests and diseases in boreal forests: myth or reality?

    Julia Koricheva;Harri Vehviläinen;Janne Riihimäki;Kai Ruohomäki

  • Effects of stand tree species composition and diversity on abundance of predatory arthropods

    Harri Vehviläinen;Julia Koricheva;Kai Ruohomäki

  • Delayed Inducible Resistance in Mountain Birch in Response to Fertilization and Shade

    K. Ruohomaki;F. S. Chapin;E. Haukioja;S. Neuvonen

  • Oviposition Choices of Epirrita autumnata (Lepidoptera: Geometridae) in Relation to Its Eruptive Population Dynamics

    Toomas Tammaru;Pekka Kaitaniemi;Kai Ruohomäki

  • HIGH LARVAL PREDATION RATE IN NON-OUTBREAKING POPULATIONS OF A GEOMETRID MOTH

    Miia Tanhuanpää;Kai Ruohomäki;Esa Uusipaikka

  • The evolution of female flightlessness among Ennominae of the Holarctic forest zone (Lepidoptera, Geometridae).

    Niklas Wahlberg;Niina Snäll;Jaan Viidalepp;Kai Ruohomäki

  • Different impact of pupal predation on populations of Epirrita autumnata (Lepidoptera; Geometridae) within and outside the outbreak range

    Miia Tanhuanpää;Kai Ruohomäki;Pekka Kaitaniemi;Tero Klemola

  • Old mountain birches at high altitudes are prone to outbreaks of Epirrita autumnata (Lepidoptera: Geometridae)

    Kai Ruohomäki;Tarmo Virtanen;Pekka Kaitaniemi;Toomas Tammaru

  • Seasonally varying diet quality and the quantitative genetics of development time and body size in birch feeding insects.

    Antti Kause;Irma Saloniemi;Jean-Philippe Morin;Erkki Haukioja

  • Compensatory responses in lepidopteran larvae: a test of growth rate maximisation

    Toomas Tammaru;Sören Nylin;Kai Ruohomäki;Karl Gotthard

  • Components of male fitness in relation to body size in Epirrita autumnata (Lepidoptera, Geometridae)

    Toomas Tammaru;Kai Ruohomäki;Kari Saikkonen

  • Crowding‐induced plasticity in Epirrita autumnata (Lepidoptera: Geometridae): weak evidence of specific modifications in reaction norms

    Toomas Tammaru;Kai Ruohomäki;Mika Montola

  • LEAF VALUE: EFFECTS OF DAMAGE TO INDIVIDUAL LEAVES ON GROWTH AND REPRODUCTION OF MOUNTAIN BIRCH SHOOTS

    Kai Ruohomäki;Erkki Haukioja;Sari Repka;Kari Lehtilä

  • Tick-borne pathogens in Finland: comparison of Ixodes ricinus and I. persulcatus in sympatric and parapatric areas.

    Maija Laaksonen;Tero Klemola;Eeva Feuth;Jani J. Sormunen

Frequent Co-Authors

Tero Klemola
Tero Klemola University of Turku
Erkki Haukioja
Erkki Haukioja University of Turku
Toomas Tammaru
Toomas Tammaru University of Tartu
Seppo Neuvonen
Seppo Neuvonen Natural Resources Institute Finland
Kari Saikkonen
Kari Saikkonen University of Turku
Julia Koricheva
Julia Koricheva Royal Holloway University of London
Niklas Wahlberg
Niklas Wahlberg Lund University
Matthew P. Ayres
Matthew P. Ayres Dartmouth College
Gimme H. Walter
Gimme H. Walter University of Queensland
Hein Sprong
Hein Sprong Wageningen University & Research

External Links

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Related Online Degrees & Career Pathways

Students interested in Ecology and Evolution often explore related online degrees to broaden career options. Popular pathways include environmental policy, science communication, library science, and special education roles.

For those passionate about research and information management, consider pursuing a library science degree. This can prepare you for opportunities in academic institutions, museums, and public resource centers.

If history is your passion, a cheapest online history master's degree can deepen your understanding of environmental changes and their contexts—enhancing ecological research.

Communication skills are vital across many fields. Students with a background in ecology might consider SLP bridge pathway for communication sciences graduates to enter speech-language pathology. Accelerated learning options such as asha accredited online slp programs ensure professional standards are met in a streamlined format.

Exploring these interdisciplinary degrees expands your skill set and increases career flexibility in scientific, educational, and advisory roles.

Best Scientists Citing Kai Ruohomäki

Toomas Tammaru

Toomas Tammaru

University of Tartu

Publications: 49

Erkki Haukioja

Erkki Haukioja

University of Turku

Publications: 46

Hervé Jactel

Hervé Jactel

University of Bordeaux

Publications: 31

Rolf A. Ims

Rolf A. Ims

University of Tromsø - The Arctic University of Norway

Publications: 31

Mikhail V. Kozlov

Mikhail V. Kozlov

University of Turku

Publications: 30

Tero Klemola

Tero Klemola

University of Turku

Publications: 30

Julia Koricheva

Julia Koricheva

Royal Holloway University of London

Publications: 25

Bastien Castagneyrol

Bastien Castagneyrol

University of Bordeaux

Publications: 24

Seppo Neuvonen

Seppo Neuvonen

Natural Resources Institute Finland

Publications: 21

Markus J. Rantala

Markus J. Rantala

University of Turku

Publications: 19

Elena L. Zvereva

Elena L. Zvereva

University of Turku

Publications: 18

Helge Bruelheide

Helge Bruelheide

Martin Luther University Halle-Wittenberg

Publications: 17

Juha-Pekka Salminen

Juha-Pekka Salminen

University of Turku

Publications: 17

Andreas Schuldt

Andreas Schuldt

University of Göttingen

Publications: 17

Tomas Roslin

Tomas Roslin

Swedish University of Agricultural Sciences

Publications: 16

Terry V. Callaghan

Terry V. Callaghan

University of Sheffield

Publications: 16

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