World's Best Scientists 2026 revealed!
Harri Hakkarainen

Harri Hakkarainen

D-Index & Metrics

Ecology and Evolution

D-Index
37
Citations
3849
World Ranking
6975
National Ranking
117

Harri Hakkarainen 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 Harri Hakkarainen 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: 87 publications — 10th percentile

10% of scientists in this discipline score the same or lower.

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

Harri Hakkarainen 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 Harri Hakkarainen 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: 37 D-Index — 20th percentile

20% of scientists in this discipline score the same or lower.

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

Overview

Harri Hakkarainen is affiliated with the University of Turku in Finland. Their research primarily spans the fields of Agricultural and Biological Sciences as well as Biochemistry, Genetics and Molecular Biology.

The main subfields of Hakkarainen's work include Ecology, Evolution, Behavior and Systematics and Genetics. This reflects an emphasis on understanding living organisms within their environments as well as genetic factors influencing biological traits.

Key topics covered in Hakkarainen's research output are:

  • Insect and Arachnid Ecology and Behavior
  • Plant and animal studies
  • Animal Behavior and Reproduction

Among Hakkarainen's recent publications is a 2024 paper titled "Coexistence of territorial competitor ants in fragmented boreal forest landscape" published in Oecologia. This work investigates the interactions between competing ant species in a boreal forest context.

Frequent co-authors collaborating with Hakkarainen include:

  • Jouni Sorvari
  • Esa Huhta

Hakkarainen's scholarly articles have appeared in venues such as:

  • Oecologia

Best Publications

  • Competitive and Predatory Interactions among Raptors: An Observational and Experimental Study

    Harri Hakkarainen;Erkki Korpimaki

  • Fluctuating food supply affects the clutch size of Tengmalm's owl independent of laying date.

    Erkki Korpimäki;Harri Hakkarainen

  • Forest management is associated with physiological stress in an old-growth forest passerine.

    Petri Suorsa;Esa Huhta;Ari Nikula;Mikko Nikinmaa

  • Blood parasites and reproductive success of Tengmalm's owls: detrimental effects on females but not on males?

    E. Korpimaki;H. Hakkarainen;G.F. Bennett

  • Heavy metal pollution disturbs immune response in wild ant populations.

    Jouni Sorvari;Liisa M. Rantala;Markus J. Rantala;Markus J. Rantala;Harri Hakkarainen

  • Interactive effects of parental age and environmental variation on the breeding performance of Tengmalm's owls

    Toni Laaksonen;Erkki Korpimäki;Harri Hakkarainen

  • Carotenoid Composition of Invertebrates Consumed by Two Insectivorous Bird Species

    Tapio Eeva;Samuli Helle;Juha-Pekka Salminen;Harri Hakkarainen

  • Effects of forest patch size on physiological stress and immunocompetence in an area-sensitive passerine, the Eurasian treecreeper (Certhia familiaris): an experiment.

    Petri Suorsa;Heikki Helle;Vesa Koivunen;Esa Huhta

  • Female kestrels gain reproductive success by choosing brightly ornamented males

    Päivi Palokangas;Erkki Korpimäki;Harri Hakkarainen;Esa Huhta

  • Competitive interactions among raptors in boreal forests

    Harri Hakkarainen;Sakari Mykrä;Sami Kurki;Risto Tornberg

  • Experimental increase of predation risk induces breeding dispersal of Tengmalm's owl.

    Harri Hakkarainen;Petteri Ilmonen;Vesa Koivunen;Erkki Korpimäki

  • Individual variation in immune function in the ant Formica exsecta; effects of the nest, body size and sex

    Liisa Vainio;Harri Hakkarainen;Markus J. Rantala;Jouni Sorvari

  • A test of male mating and hunting success in the kestrel: the advantages of smallness?

    H. Hakkarainen;E. Huhta;Katriina Lahti;Päivi Lundvall

  • Nest defence of Tengmalm's owls reflects offspring survival prospects under fluctuating food conditions

    Harri Hakkarainen;Erkki Korpimäki

  • Thresholds in selection of breeding habitat by the Eurasian treecreeper (Certhia familiaris)

    Petri Suorsa;Esa Huhta;Ari Jäntti;Ari Nikula

  • Deforestation reduces nest mound size and decreases the production of sexual offspring in the wood ant Formica aquilonia

    Jouni Sorvari;Harri Hakkarainen

  • Wood ants are wood ants: deforestation causes population declines in the polydomous wood ant Formica aquilonia

    Jouni Sorvari;Harri Hakkarainen

  • Food resources, chemical signaling, and nest mate recognition in the ant Formica aquilonia

    Jouni Sorvari;Jouni Sorvari;Jouni Sorvari;Pascal Theodora;Stefano Turillazzi;Harri Hakkarainen

  • Forest Fragmentation Increases Nest Predation in the Eurasian Treecreeper

    Esa Huhta;Teija Aho;Ari Jäntti;Petri Suorsa

  • Home range size is determined by habitat composition but feeding rate by food availability in male Tengmalm’s owls

    Andrea Santangeli;Harri Hakkarainen;Toni Laaksonen;Erkki Korpimäki

  • Effects of forest patch size on physiological stress and immunocompetence in an area-sensitive passerine, the Eurasian treecreeper

    Petri Suorsa;Heikki Helle;Vesa Koivunen;Esa Huhta

Frequent Co-Authors

Erkki Korpimäki
Erkki Korpimäki University of Turku
Markku Kuitunen
Markku Kuitunen University of Jyväskylä
Toni Laaksonen
Toni Laaksonen University of Turku
Jukka Suhonen
Jukka Suhonen University of Turku
Markus J. Rantala
Markus J. Rantala University of Turku
Tapio Mappes
Tapio Mappes University of Jyväskylä
Tapio Eeva
Tapio Eeva University of Turku
Ronald C. Ydenberg
Ronald C. Ydenberg Simon Fraser University
Esa Koskela
Esa Koskela University of Jyväskylä
Jukka Jokimäki
Jukka Jokimäki University of Lapland

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Related Online Degrees & Career Pathways

Studying Ecology and Evolution opens doors to diverse career pathways that connect science with societal needs. If you’re interested in understanding behavior, ecosystems, or the impact of environment on development, consider exploring additional or complementary online degrees in related fields.

Psychology and counseling share strong links with evolutionary biology and ecological studies. For those drawn to criminal investigations or legal settings, understanding how much does a forensic psychologist make could inform your decision to branch into forensic psychology. This area examines how biology impacts behavior within justice systems.

Alternatively, a masters in child psychology or an online master's in counseling can lead to careers supporting people’s development and well-being—often incorporating ecological or evolutionary frameworks for understanding human growth and adaptation.

Finally, those interested in health or clinical research may benefit from exploring clinical psychology masters programs online, offering flexible pathways to work in mental health and allied professions.

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