Parasitoid Ecology Group


Group Leader

Dr. Saskya van Nouhuys

Population and community ecologist, working mostly with parasitoid wasps. Publications, CV

Parasitoid Ecology Group web page
Metapopulation Research Centre web page

Current group members


Dr. Joanneke Reudler Talsma

Postdoc (2014- ) - Multitrophic interactions through Volatile organic chemicals.   Co-hosted with J. K. Holopainen

   Personal web page

Dr. Abhilash Nair

 Postdoc (2013- ) - Spatial population genetics           of parasitoid wasps

   Personal web page

Publications from this project:
Nair, A., van Nouhuys, S. 2015. Conservation                               Genetics Resources, 10.1007/s12686-015-0425-7

Nair, A., Fountain, T., Ikonen, S., Ojanen, S. P., van Nouhuys, S. 2016
Proceedings of the Royal Society B, 283, doi: 10.1098/rspb.2016.0668

Wolfgang Reschka

Wolfgang Reschka

PhD student (2012-) - Spatial foraging behavior of the parasitoid Hyposotor horticola

Marina Granger-Brown

Emma Hakanen

 MSc (gradu) (2014-2017) - Mating structure of the parasitoid Cotesia melitaearum. 

Terhi Lahtinen

Yann Bailly

MSc internship (2017)- Sex determination in the  parasitoid Cotesia glomerata


Emma Hakanen


MSc (gradu) in plant-insect interactions




Past group members: visitors, postdocs & PhD students


Christelle Couchoux

Dr. Christelle Couchoux

PhD student (2009-13) - Intraspecific competition in the foraging behaviour of the parasitoid Hyposoter horticola  PhD thesis

Now a postdoc with Jeremy Field

Publications: Couchoux, C. & van Nouhuys, S. 2014. Journal of Insect Behavior, 27: 283-301.

Couchoux, C., P. Seppä, and S. van Nouhuys. 2015. Conservation Genetics Resources. DOI  10.1007/s12686-015-0437-3

Montovan, K. J., Couchoux, C., Jones, L. E., Reeve, H. K., van Nouhuys, S. The puzzle of partial resource use by a parasitoid wasp. 2015. The American Naturalist, 185: 538–550

Couchoux, C., Seppä, P., van Nouhuys, S.2015 Effectiveness of deterrent marking by a parasitoid wasp: Behavioral and genetic approaches. Behaviour, DOI:10.1163/1568539X-00003277

Couchoux,, C., Seppä, P., van Nouhuys,, S. 2016
Strong dispersal in a parasitoid wasp overwhelms habitat fragmentation and host population dynamics.  Molecular Ecology, doi: 10.1111/mec.13696

Dr. Kristina Karlsson-Green

Postdoc (2012- 14) - Multitrophic interactions between a plant, a phytopathogen, an herbivore and a parasitoid (collaborative project with A-L Laine and Marjo Saastamoinen)

Dr. Katie Montovan

PhD student (2008-13) Cornell University, Center for applied Math. Dissertation is titled "Cooperative behavior in bees, wasps, and burglars"

Now a faculty member at Bennington College

Publication: Montovan, K. J., Couchoux, C., Jones, L. E., Reeve, H. K., van Nouhuys, S. 2015. The puzzle of partial resource use by a parasitoid wasp. The American Naturalist, 185: 538–550                   

Dr. Delia Pinto Zevallos

Postdoc (2012) - emissions of herbivore-induced volatile organic compounds in Plantago lanceolata and Veronica spicata. Co-supervised with J. K. Holopainen

Now at Universidade Federal do Paraná, Laboratório de Semioquímicos

Publication: Pinto-Zevallos, D. M., Hellen, H., Hakola, H., van Nouhuys, S., Holopainen, J. K. 2013. Phytochemistry Letters, 6: 653-656

Dr. Norio Hirai

Research visitor (2010) Japan- Ecology and Intraspecific competition in pupal parasitoids

Publication from visit: Saastamoinen, M., Hirai, N., van Nouhuys, S. 2013.Oecologia, 171: 93-104

Dr. Carolina Reigada

Postdoctoral visitor (2008) - Density dependent foraging behavior of a hyperparasitoid wasp

Current position: Post-doctoral Researcher, University of São Paulo,

Dr. Joanneke Reudler Talsma

PhD student of A. Biere & J. Harvey, Nertherlands Institute of Ecology - Costs and benefits of iridoids glycosides in multitrophic systems

Publications from thesis: Reudler Talsma, J., Biere, A., Harvey, J. A., van Nouhuys, S. 2008. Journal of Chemical Ecology, 34: 2102-1212

Reudler Talsma, J., Torri, K. van Nouhuys, S. 2008. Arthropod-Plant Interactions, 2: 63-75

Reudler, J. H., Biere, A., Harvey, J. A., van Nouhuys, S. 2011. Journal of Chemical Ecology, 37:765-778

Dr. Marcela Castelo

Postdoc (2004) - Olfactory attraction of parasitoids to their host and host-food plant complex

Now at Dpto. de Ecologia, Genetica y Evolucion Ciudad Universitaria de Buenos Aires, Argentina

Publication from visit: Castelo, M. K., van Nouhuy, S. &. Corley, J. C. 2010. Journal of insect Science, Vol. 10, article 53

Dr. Maaria Kankare

PhD (1999-2004) (primary advisor I. Hanski) - Phylogeny and host associations of Cotesia parasitoids attacking checkerspot butterflies
Currently an Academy Researcher at the University of Jyväskylä

Publications from thesis: Kankare, M., Stefanescu, C., van Nouhuys, S., Shaw, M. R. 2005. The Biological Journal of the Linnean Society, 86: 45-65

Kankare, M., van Nouhuys, S., Gaggiotti, O., Hanski, I. 2005. Oecologia, 143: 77-84

Kankare, M., van Nouhuys, S. Hanski, I. 2005. Annals of the Entomological Society of America, 98: 382-394

Past group members: MSc & undergraduates


Terhi Lahtinen

Pil Rasmussen

MSc (2013-14) - Multitrophic linteractions between a plant, herbivore and parasitoid. (co-advised with T. Karlsson-Green)

Currently: PhD student at Stockholm University

Publocation from this work: Rasmussen, P. U., Amin, T., Bennett, A. E., Karlsson Green, K.,  Timonen, S., van Nouhuys, S., Tack, A. J. M. 2017. Plant and insect genetic variation mediate the impact of arbuscular mycorrhizal fungi on a natural plant-herbivore interaction.Ecological Entomology, 42 793-802.

Emma Hakanen

Marina Granger-Brown

MSc (2014)  Intraspecific competition by the parasitoid wasp H. horticola


Aapo Ahola

MSc (gradu) (2011- 13) - Heritability of traits associated with landscape structure in Plantago lanceolata (co-advised with Anna-Liisa Laine)

Pil Rasmussen

Terhi Lahtinen

MSc (gradu) (2011) - Variation in the response to drought in Plantago lanceolata

Peter Kullberg

MSc (gradu) (2010-12) - Habitat fragmentation and the performance of P. lanceolata and V. spicata
(co-advised with Anna-Liisa Laine).

Currently a PhD student at University of Helsinki with Atte Moilanen

David Muru

MSc internship (2012) France - The role of group behavior on the relationship of the butterfly M. cinxia with the parasitoid H. horticola


Riikka Alanen (Hartikainen)

MSc (gradu) (2010-2012) - Habitat fragmentation and the germination of P. lanceolata and V. spicata
(co-advised with Anna-Liisa laine)
Currently a PhD student at University of Helsinki with Anna-Liisa Laine


Suvi Niemikapee (Pakarinen)

MSc (gradu) (2010-2011) - Host-parasitoid relationship in different Cotesia melitaearum and Melitaea cinxia populations around the Baltic Sea

Publication: van Nouhuys, S., Niemikapee S., Hanski, I. 2012. Insects, 3: 1236-1256

Tom Kraft

Tom S. Kraft

Undergraduate Honours thesis (08-10) - Indirect interaction between butterflies mediated by pupal parasitoids (Cornell University)

Currently: PhD student at Dartmouth College, USA

Publications from the project:van Nouhuys, S. & Kraft, T. S. 2012. Population Ecology. 54: 251-260

Publication: Kraft, T. S. & van Nouhuys, S. 2013. Ecological Entomology 38: 138-146

Markku Ojanen

Markku Ojanen

MSc (05-08) - Plant, phytopathogen, parasitoid interaction


Anne Reichgelt

Anne Reichgelt

MSc (07) - Density dependent parasitism by the hyperparasitoid Mesochorus stigmaticus



Kaisa Torri

MSc (2005-07) - Natural history of the butterfly Melitaea athalia and its parasitoids

Publication from her thesis: Reudler Talsma, J., Torri, K. van Nouhuys, S. 2008. Arthropod-Plant Interactions, 2: 63-75


Riika Kaartinen

Dr. Riikka Kaartinen

MSc (03-06) - Spatial foraging behavior of the parasitoid Hyposoter horticola (University ofHelsinki)

Currently: a post doc in Uppsala

Publication: van Nouhuys, S. Kaartinen, R. 2008. Proceedings of the Royal Society B, 275: 377-385

Lucie Salvaudon

Dr. Lucie Salvaudon

MSc intern (2002) Paris, France - Experimental test of host avoidance of parasitism byHyposoter horticola


Johanna Ehrnsten

Johanna Ehrnsten

MSc (01-03) - Movement and oviposition behavior of an extremely mobile parasitoid wasp, Hyposoter horticola

Publication from her thesis: van Nouhuys, S, Ehrnsten, J. 2004. Behavioral Ecology, 15: 661-665

Christian Anton

Dr. Christian Anton

MSc (00-01) Jena, germany - Behavioral and developmental responses of a specialist parasitoid wasp to host larvae feeding on two host food plant species

Eeva Punju

Eeva Punju

MSc (00-02) - Interspecific competition between immature parasitoid wasps within host larvae

Publication from her thesis: van Nouhuys, S. and Punju, E. 2010. Oikos, 119: 61-70