My research revolves mainly around old trees, oak-living beetles and conservation. I have explored various aspects of preserving the beetle fauna on old oak trees.

For example, I have developed and tested artificial oak-wood nest boxes for oak living species. Such boxes can successfully support local insect diversity and provide “stepping-stones” between isolated areas.

The beetle fauna in old oak trees is very diverse and contain many rare and threatened species. As oak habitat has decreased in Sweden and Europe, it is important to map and understand how this diversity can be protected. To broaden this knowledge I have a long standing cooperation with researchers in Turkey, and I manage a pan-European oak beetle project.

I’m also a member of the Redlist committees for beetles in Sweden and for saproxylic beetles in Europe.

Online profiles

Research group


Publication list


Laia Mestre, Niklas Jansson, Thomas Ranius

Saproxylic biodiversity and decomposition rate decrease with small-scale isolation of tree hollows

In Biological Conservation

Article in journal

M. Korkmaz, A. Akyol, T. Turkoglu, A. Bergner, Niklas Jansson, A. Tolunay


In Applied Ecology and Environmental Research

Article in journal


Staffan Carlsson, Karl-Olof Bergman, Nicklas Jansson, Thomas Ranius, Per Milberg

Boxing for biodiversity: evaluation of an artificiallycreated decaying wood habitat

In Biodiversity and Conservation

Article in journal

Adam Bergner, Anton Sunnergren, Burcu Yeşilbudak, Cahit Erdem, Nicklas Jansson

Attributes of trees used by nesting and foraging woodpeckers (Aves: Picidae) in an area with old pollarded Oaks (Quercus spp.) in the Taurus Mountains, Turkey

In Zoology in the Middle East

Article in journal

Per Milberg, Karl-Olof Bergman, Kerem Sancak, Nicklas Jansson

Assemblages of saproxylic beetles on large downed trunks of oak

In Ecology and Evolution

Article in journal


Sakine Serap Avgin, Gloria Antonini, Andrzej Lason, Niklas Jansson, Tuba Oncul Abacigil, Sakin Vural Varli, Alessio De Biase, Paolo Audisio

New data on distribution, ecology, and taxonomy of Turkish Nitidulidae (Coleoptera)

In Turkish Journal of Zoology

Article in journal

Adam Bergner, Mustafa Avci, Hasan Eryigit, Nicklas Jansson, Mats Niklasson, Lars Westerberg, Per Milberg

Influences of forest type and habitat structure on bird assemblagesof oak (Quercus spp.) and pine (Pinus spp.) stands in southwesternTurkey

In Forest Ecology and Management

Article in journal

Per Milberg, Karl-Olof Bergman, Henrik Norman, Roger B. Pettersson, Lars Westerberg, Lars-Ove Wikars, Nicklas Jansson

A burning desire for smoke? Sampling insects favoured by forestfire in the absence of fire

In Journal of Insect Conservation

Article in journal

Leonie A. Goug, Anne Sverdrup-Thygeson, Per Milberg, Hanne E. Pilskog, Nicklas Jansson, Mats Jonsell, Tone Birkemoe

Specialists in ancient trees are more affected by climate than generalists

In Ecology and Evolution

Article in journal


Klas Andersson, Karl-Olof Bergman, Fredrik Andersson, Erik Hedenström, Nicklas Jansson, Joseph Burman, Inis Winde, Mattias C. Larsson, Per Milberg

High-accuracy sampling of saproxylic diversity indicators at regionalscales with pheromones: The case of Elater ferrugineus (Coleoptera, Elateridae)

In Biological Conservation

Article in journal

Per Milberg, Karl-Olof Bergman, Helena Johansson, Nicklas Jansson

Low host-tree preferences among saproxylic beetles: acomparison of four deciduous species

In Insect Conservation and Diversity

Article in journal

Jacek Hilszczanski, Tomasz Jaworski, Radoslaw Plewa, Niklas Jansson

Surrogate tree cavities: boxes with artificial substrate can serve as temporary habitat for Osmoderma barnabita (Motsch.) (Coleoptera, Cetoniinae)

In Journal of Insect Conservation

Article in journal


Giuseppe M. Carpaneto, Stefano Chiari, Paolo A. Audisio, Piero Leo, Andrea Liberto, Nicklas Jansson, Agnese Zauli

Biological and distributional overview of the genus Eledonoprius (Coleoptera: Tenebrionidae)mology: Rare fungus-feeding beetles of European old-growth forests

In European Journal of Entomology

Article in journal

Vladimir Novak, Mustafa Avci, Nicklas Jansson, Oğuzhan Sarikaya, Erol Atay, Tamer Kayis, Mustafa Coskun, Faith Aytar

A New Mycetochara Species (Coleoptera: Tenebrionidae: Alleculinae) from Turkey

In Journal of the Entomological Research Society

Article in journal

Najihah Musa, Klas Andersson, Joseph Burman, Fredrik Andersson, Erik Hedenstrom, Niklas Jansson, Heidi Paltto, Lars Westerberg, Inis Winde, Mattias C. Larsson, Karl-Olof Bergman, Per Milberg

Using Sex Pheromone and a Multi-Scale Approach to Predict the Distribution of a Rare Saproxylic Beetle


Article in journal

Slawomir Mazur, Öncül Abacigil Tuba, Sakin Vural Varli, Tomasz Mokrzycki, Nicklas Jansson

Hister arboricavus sp. n., a new denrophilous species from Turkey(Coleoptera: Histeridae)

In Baltic Journal of Coleopterol

Article in journal


Karl-Olof Bergman, Nicklas Jansson, Kenneth Claesson, Michael W. Palmer, Per Milberg

How much and at what scale? Multiscale analyses as decision support for conservation of saproxylic oak beetles

In Forest Ecology and Management

Article in journal

Sakine Serap Avgin, Donatella Magri, Gloria Antonini, Emiliano Mancini, Niklas Jansson, Andrzej Lason, Paolo Audisio

Review of the cedar and oak forest-associated Epuraea latipes species group (Coleoptera: Nitidulidae, Epuraeinae), with description of a new species from southern Turkey

In Entomologica Fennica

Article in journal

Vladimir Novak, Nicklas Jansson, Stefano Chiari, Agnese Zauli, Paolo Audisio, Giuseppe M. Carpaneto

A new species of Allecula (Coleoptera: Tenebrionidae: Alleculinae)from cork oak stands of Italy

In Zootaxa

Article in journal


Paolo Audisio, Stefano Chiari, Agnese Zauli, Nicklas Jansson

Pityophagus  querceus Reitter, 1877, A new saproxylic sap beetle of the Italian fauna (Coleoptera, Nitidulidae)

In Fragmenta Entomologica

Article in journal