20072018
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Personal profile

Description of research and teaching

I finished my PhD  in April 2011 with Tomas Roslin  as my supervisor (For thesis intro, see https://helda.helsinki.fi/handle/10138/24932). My thesis examined how the composition of surrounding landscape affects the structure of food webs, and how consistent these food webs are temporally. I continued to work with Tomas as a post doc after finishing my thesis.

I am interested in insect community ecology, host-parasitoid interactions, food webs and ecosystem function. What happens to species and interactions at different trophic levels when surrounding habitat changes, new species colonize the community, or some species go extinct? Excellent model systems for food web studies are herbivorous insects and their parasitoids wasps. Before my PhD I have worked also with parasitoid behavioural ecology and taxonomy.

In my PhD I examined how food web structure is affected by the configuration of surrounding landscape. I also measured how temporally consistent these webs are.  As one key part of my thesis, I used DNA barcoding to resolve cryptic species in the food web, and examined their effect on food web structure. As a model system, I used a community of nearly 90 species of specialized herbivorous insects on oak and their natural enemies. These species included gall wasps, leafminers and their parasitoid and inquiline wasps. I constructed 30 quantitative food webs in a spatially explicit setting, at two different scales.

Currently in my post doc I work with two projects. One untangles the relationship between ecosystem function and diversity, measured at the level of species and functional groups. As the measure of function I use the decomposition of dung by dung beetles and earth worms. This question was examined by a nation-wide experiment, taking advantage of citizen science. The second project is a long-term initiative where first fully quantitative food webs are built for an arctic site, using arthropod community in Greenland as a model system. Here we utilize DNA barcoding to resolve species and interactions in the community.

Keywords

  • 118 Biological sciences

International and National Collaboration Publications and projects within past five years.

Publications 2007 2018

High temporal consistency in quantitative food web structure in the face of extreme species turnover

Kaartinen, R. & Roslin, T., 2012, In : Oikos. 2012, 121, p. 1771-1882

Research output: Contribution to journalArticleScientificpeer-review

Shrinking by numbers: landscape context affects the species composition but not the quantitative structure of local food webs

Kaartinen, R. & Roslin, T., 2011, In : Journal of Animal Ecology. 80, 3, p. 622–631 10 p.

Research output: Contribution to journalArticleScientificpeer-review

Spatial ecology of food webs: herbivore-parasitoid communities on the pedunculate oak

Kaartinen, R., 1 Mar 2011, 94 p.

Research output: ThesisDoctoral ThesisCollection of Articles

Open Access
File

Revealing secret liaisons: DNA barcoding changes our understanding of food webs

Kaartinen, R., Stone, G. N., Hearn, J., Lohse, K. & Roslin, T., 2010, In : Ecological Entomology. 35, 5, p. 623-638 16 p.

Research output: Contribution to journalArticleScientificpeer-review

Related herbivore species show similar temporal dynamics

Blanchet, F. G., Roslin, T., Kimura, M. T., Huotari, T., Kaartinen, R., Gripenberg, S. & Tack, A. J. M., May 2018, In : Journal of Animal Ecology. 87, 3, p. 801-812 12 p.

Research output: Contribution to journalArticleScientificpeer-review

Projects 2011 2014

Prizes

Olli’s prize: Spring Symposium

Riikka Kaartinen (Recipient), 2009

Prize: Prizes and awards

Activities 1999 2012

  • 11 Organisation and participation in conferences, workshops, courses, seminars
  • 3 Academic visit to other institution
  • 2 Membership or other role in public Finnish or international organization

University of Guelph

Riikka Kaartinen (Visiting researcher)
23 Jan 201210 Feb 2012

Activity: Visiting an external institution typesAcademic visit to other institution

EEF, European Ecological Federation Congress

Riikka Kaartinen (Speaker: Presenter)
25 Sep 201129 Sep 2011

Activity: Participating in or organising an event typesOrganisation and participation in conferences, workshops, courses, seminars

Insect communities in space and time

Riikka Kaartinen (Chair of organizing committee)
10 Mar 2011

Activity: Participating in or organising an event typesOrganisation and participation in conferences, workshops, courses, seminars

Gordon Research Conference on Plant Herbivore Interactions

Riikka Kaartinen (Poster Presentation)
21 Feb 201026 Feb 2010

Activity: Participating in or organising an event typesOrganisation and participation in conferences, workshops, courses, seminars

Zackenberg Research Station

Riikka Kaartinen (Visiting researcher)
13 Jun 201227 Jul 2012

Activity: Visiting an external institution typesAcademic visit to other institution