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Harri Hakkarainen

Harri Hakkarainen

D-Index & Metrics

Ecology and Evolution

D-Index
37
Citations
3849
World Ranking
6979
National Ranking
117

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.

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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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