World's Best Scientists 2026 revealed!
Jan T. Lifjeld

Jan T. Lifjeld

D-Index & Metrics

Ecology and Evolution

D-Index
63
Citations
11326
World Ranking
1996
National Ranking
30

Jan T. Lifjeld 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 Jan T. Lifjeld 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: 205 publications — 75th percentile

75% of scientists in this discipline score the same or lower.

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

Jan T. Lifjeld 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 Jan T. Lifjeld 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: 63 D-Index — 77th percentile

77% of scientists in this discipline score the same or lower.

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

Overview

Jan T. Lifjeld is a researcher affiliated with the University of Oslo in Norway. Their work spans multiple fields related to biology, with a focus on environmental science and agricultural and biological sciences. Lifjeld's expertise encompasses areas such as ecology, evolution, behavior, and molecular biology.

The scientist's research predominantly covers topics within animal behavior and reproduction, and avian ecology and behavior. Additional focal points include plant and animal studies, wildlife ecology and conservation, genetic diversity and population structure, as well as fish ecology and management studies and insect and arachnid ecology and behavior.

Lifjeld has contributed scholarly articles in several notable scientific journals. Recent publications include:

  • When Older Males Sire More Offspring-Increased Attractiveness or Higher Fertility?, 2022, Behavioral Ecology and Sociobiology
  • Spatiotemporal patterns of avian host-parasite interactions in the face of biogeographical range expansions, 2020, Molecular Ecology
  • Longer Sperm Swim More Slowly in the Canary Islands Chiffchaff, 2021, Cells
  • Sperm length variation among Afrotropical songbirds reflects phylogeny rather than adaptations to the tropical environment, 2020, Zoology
  • Selection on sperm size in response to promiscuity and variation in female sperm storage organs, 2022, Journal of Evolutionary Biology

The majority of Lifjeld's publications are found in journals such as Behavioral Ecology and Sociobiology, Ecology and Evolution, Evolution, bioRxiv (Cold Spring Harbor Laboratory), and Cells.

Coauthorship has been an important aspect of Lifjeld's research endeavors. Frequent collaborators include:

  • Arild Johnsen
  • Emily R. A. Cramer
  • Erica H. Leder
  • Lars Erik Johannessen
  • Gaute Grønstøl

The research fields represented in Lifjeld's body of work correspond to environmental science, agricultural and biological sciences, and biochemistry, genetics, and molecular biology. Subfields featured prominently include ecology, evolution, behavior and systematics, genetics, nature and landscape conservation, and molecular biology.

Best Publications

  • Females increase offspring heterozygosity and fitness through extra-pair matings

    Katharina Foerster;Kaspar Delhey;Arild Johnsen;Jan T. Lifjeld

  • POLYGYNY IN BIRDS: THE ROLE OF COMPETITION BETWEEN FEMALES FOR MALE PARENTAL CARE

    Tore Slagsvold;Jan T. Lifjeld

  • Extra-pair paternity in monogamous tree swallows

    Jan T. Lifjeld;Peter O. Dunn;Raleigh J. Robertson;Peter T. Boag

  • Female bluethroats enhance offspring immunocompetence through extra-pair copulations

    Arild Johnsen;Vegard Andersen;Christine Sunding;Jan T. Lifjeld

  • Variation in plumage colour of the Great tit Parus major in relation to habitat, season and food

    T. Slagsvold;J. T. Lifjeld

  • Ultraviolet plumage ornamentation affects social mate choice and sperm competition in bluethroats (Aves: Luscinia s. svecica): a field experiment

    Arild Johnsen;Staffan Andersson;Jonas rnborg;Jan T. Lifjeld

  • Female control of extra-pair fertilization in tree swallows

    Jan T. Lifjeld;Raleigh J. Robertson

  • DNA barcoding of Scandinavian birds reveals divergent lineages in trans-Atlantic species

    Arild Johnsen;Eirik Rindal;Per G. P. Ericson;Dario Zuccon

  • INTRASPECIFIC VARIATION IN SPERM LENGTH IS NEGATIVELY RELATED TO SPERM COMPETITION IN PASSERINE BIRDS

    Oddmund Kleven;Terje Laskemoen;Frode Fossøy;Raleigh J. Robertson

  • Carotenoids in food chain studies—II. The food chain of Parus SPP. Monitored by carotenoid analysis☆

    V Partali;S Liaaen-Jensen;T Slagsvold;J.T Lifjeld

  • On the cost of searching for a mate in female pied flycatchers Ficedula hypoleuca

    Tore Slagsvold;Jan T. Lifjeld;Geir Stenmark;Torgrim Breiehagen

  • Mate choice and imprinting in birds studied by cross-fostering in the wild

    Tore Slagsvold;Bo T. Hansen;Lars E. Johannessen;Jan T. Lifjeld

  • Effects of breeding density, synchrony, and experience on extrapair paternity in tree swallows

    Peter O. Dunn;Linda A. Whittingham;Jan T. Lifjeld;Raleigh J. Robertson

  • The function of extrapair paternity in blue tits and great tits: good genes or fertility insurance?

    Christin Krokene;Kari Rigstad;Monica Dale;Jan T. Lifjeld

  • Influence of Male and Female Quality on Clutch Size in Tits (Parus Spp.)

    Tore Slagsvold;Jan T. Lifjeld

  • COMPARATIVE EVIDENCE FOR THE EVOLUTION OF SPERM SWIMMING SPEED BY SPERM COMPETITION AND FEMALE SPERM STORAGE DURATION IN PASSERINE BIRDS

    Oddmund Kleven;Frode Fossøy;Frode Fossøy;Terje Laskemoen;Raleigh J. Robertson

  • Low frequency of extra-pair paternity in pied flycatchers revealed by DNA fingerprinting

    Jan T. Lifjeld;Tore Slagsvold;Helene M. Lampe

  • Genetic relationships in the peregrine falcon ( Falco peregrinus ) analysed by microsatellite DNA markers

    M. Nesje;K. H. Røed;J. T. Lifjeld;P. Lindberg

  • The function of courtship feeding during incubation in the pied flycatcher Ficedula hypoleuca

    Jan T. Lifjeld;Tore Slagsvold

  • Polygyny in the pied flycatcher, Ficedula hypoleuca: a test of the deception hypothesis

    Geir Stenmark;Tore Slagsvold;Jan T. Lifjeld

Frequent Co-Authors

Arild Johnsen
Arild Johnsen University of Oslo
Oddmund Kleven
Oddmund Kleven Norwegian Institute for Nature Research
Tore Slagsvold
Tore Slagsvold University of Oslo
Tomáš Albrecht
Tomáš Albrecht Charles University
Raleigh J. Robertson
Raleigh J. Robertson Queen's University
Peter O. Dunn
Peter O. Dunn University of Wisconsin–Milwaukee
Geir Rudolfsen
Geir Rudolfsen University of Tromsø - The Arctic University of Norway
Trond Amundsen
Trond Amundsen Norwegian University of Science and Technology
Linda A. Whittingham
Linda A. Whittingham University of Wisconsin–Milwaukee
Donald Blomqvist
Donald Blomqvist University of Gothenburg

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