PRIMARY RESEARCH INTEREST

• Ecological risk with GM trees
• Plant-animal interactions
• Sustainable forest use
• Conservation biology
• Restoration ecology
• Chemical ecology
• Insect ecology
  
  

• 2006. Transgenic trees: a multidisciplinary approach to problems related to public attitudes, social acceptance and ecological risks. (Formas).
• 2006. Genetically modified trees: consequences for biodiversity and ecosystem processes. (Formas).
• 2007. A quantitative estimation of the importance of short stumps for saproxylic organisms and the variation of this importance in the landscape. (Swedish energy agency).
• 2007. Long term influence on the ecosystem and the run off water from stump harvesting (Swedish energy agency) Co-applicant, Main applicant A. Albrektsson.
• 2008. Overview: Economic Assessment for the Environment. (Swedish Environmental Protection Agency). Co-applicant, PI- Bengt Kriström Department of Forest Economics, SLU.
• 2008. General concerns and indicators. (WWF) (for CBM).
• 2008. Future forests. Mistra Programme. Co-applicant, main applicants SLU, Umeå University and “Skogforsk”) (for CBM).
• 2008. Colonization ability of forestry-intolerant species –A core factor for biodiversity conservation in fragmented forest landscapes during climate change. (CMF) Co-applicant, Main applicant M. Dynesius.
• 2008. Effects of intensified forestry on ecosystem composition and biodiversity. (Swedish energy agency). Co-applicant, Main applicant T. Johansson.
• 2009. Ecosystem restoration in policy and practice: restore, develop, adapt. FORMAS (4 year strategic grant, total 20 milj) Co-applicant, main applicant Christer Nilsson, Umeå University.
• 2009. Restoration of set-asides. (Kempe fundation).
  
   
  

• PhD-students: Anna Lindau, David Tingström, Petter Axelsson, Jon Andersson, David Bell, Andreas Karlsson Tiselius (co-supervisor).
• Post-docs: Jörgen Olsson.

62. Jörgen Olsson, Bengt Gunnar Jonsson, Joakim Hjältén, Lars Ericson . 2010. Addition of coarse woody debris - the early fungal succession on Picea abies logs in managed forests and reserves (Online first, Biological Conservation, doi:10.1016/j.biocon.2010.12.029).
61. Scogings, P.F., Johansson, T., Hjältén, J. & Kruger, J. 2010. Responses of woody vegetation to exclusion of large herbivores in semi-arid savannas. Accepted Austral Ecology.
60. Johansson, T, Andersson J. Hjältén, J, Dynesius M, Ecke F. 2010. Short-term responses of beetle assemblages to wildfire in a region with more than 100 years of fire suppression (Accepted, Insect Conservation and Diversity).
59. Mats Dynesius, Heloise Gibb, and Joakim Hjältén. 2010 Covering of downed logs by ground vegetation and soil – Variability and predictors of a neglected process in the ecology of coarse woody debris (accepted PLoS ONE).
58. Paillet, Y., Bergès, L., Hjältén, J., Ódor, P., Avon, C. Bernhardt-Römermann, M., Bijlsma, R-J., De Bruyn, L., Fuhr, M., Grandin, U., Kanka, R., Lundin, L., Luque, S., Magura, T., Matesanz, S., Mészáros, I., Sebastià, M-T., Schmidt, W., Standovár, T., Tóthmérész, B., Uotila, A., Valladares, F., Vellak, K., Virtanen, R. 2010. Compromises in Data Selection in a Meta-Analysis of Biodiversity in Managed and Unmanaged Forests: Response to Halme et al. Conservation Biology, 24, 1157–1160.
57. Hjältén, J., Stenbacka, F, Andersson J. 2010. Saproxylic beetle assemblages on low-stumps, high-stumps and logs: implications for environmental effects of stump harvest. Forest Ecology and Management, 260, 1149-1155. doi:10.1016/j.foreco.2010.07.003.
56. E. Petter Axelsson, Joakim Hjältén, Carri J. LeRoy, Riitta Julkunen-Tiitto, Anders Wennström and Gilles Pilate. 2010. Can leaf litter from genetically modified trees affect aquatic ecosystems? (Ecosystems, in press).
55. Hjältén, J., Gibb, H. and Ball J.P. 2010. Effects of low intensity burning after clear-cutting on ground living and saproxylic beetles. Basic and Applied Ecology 11: 363-372. doi:10.1016/j.baae.2009.12.012.
54. Stenbacka, F., Hjältén, J., Hilszczański, J. and Dynesius, M. 2010. Saproxylic and non-saproxylic beetle assemblages in boreal spruce forests of different age and forestry intensity (In press, Ecological Applications) [doi:10.1890/09-0815.1].
53. Wennström, A., Niemi, L., Hjältén, J. & Julkunen-Tiitto, R. 2010. Mother really knows best: Host choice of adult phytophagous insect females reflects a within-host variation in suitability as larval food. Chemoecology 20:35–42.
52. Stenbacka, F., Hjältén, J., Hilszczański, J., Ball, J. P., Gibb, H., Johansson, T., Pettersson, R.B. and Danell, K. 2010. Complementarity of sampling methods in assessing effects of forestry on parasitoids (Hymenoptera, Incheumonoidea) of saproxylic beetles. Insect Conservation and Diversity 3: 114–123.
51. Micael Jonsson, David Bell, Joakim Hjältén, Tuulikki Rooke and Peter F. Scogings. 2010. Indirect effects of mammalian herbivores on invertebrates along a catena in Kruger National Park, South Africa. African Journal of Range and Forage Science 27(1): 39–44.
50. Paillet, Y., Bergès, L., Hjältén, J., Ódor, P., Avon, C. Bernhardt-Römermann, M., Bijlsma, R-J., De Bruyn, L., Fuhr, M., Grandin, U., Kanka, R., Lundin, L., Luque, S., Magura, T., Matesanz, S., Mészáros, I., Sebastià, M-T., Schmidt, W., Standovár, T., Tóthmérész, B., Uotila, A., Valladares, F., Vellak, K., Virtanen, R. 2010. Biodiversity Differences between Managed and Unmanaged Forests: Meta-Analysis of Species Richness in Europe. Conservation Biology 24: 101–112.
49. Therese Johansson, Joakim Hjältén, Fredrik Stenbacka, Mats Dynesius. 2010. Stand type and fire are important factors determining the occurrence of flat bugs (Heteroptera: Aradidae) in northern Sweden (Online first, J. of insect conservation). DOI 10.1007/s10841-009-9218-1.
48. Hjältén, J. Lindau, A., Wennström, A., Blomberg, P. Witsell, J. and L. Ericson  2008. Vole response to unintentional changes in the chemistry of GM poplars. Chemoecology 18: 227-231. DOI 10.1007/s00049-008-0409-0.
47. Gibb, H., Hilszczanski J., Hjältén, J., et al. Ball, J.P., Johansson, T.,.,  Atlegrim O., Danell K., Pettersson R. and  2007. Responses of parasitoids to saproxylic hosts and habitat: a multi-scale study using experimental logs (accepted, Oecologia).
46. Johansson, T., Hjältén, J., Gibb, H., Hilszczanski, J., Ball, J.P., Pettersson R.B., Alinvi, O., Stenlid, J., Danell, K 2007. Variable response of different functional groups of saproxylic beetles to substrate manipulation and forest management: Implications for conservation strategies. Forest Ecology and Management 242: 496–510.
45. Hjältén, J., Niemi, L., Wennström, A. Ericson L., Roininen H,  and Julkunen-Tiitto R. 2007. Variable responses of natural enemies to phenotypic variation in Salix triandra: the importance of plant secondary chemistry. Oikos 116: 751-758.
44. Therese Johansson; Heloise Gibb; Joakim Hjältén; Roger B Pettersson; Jacek Hilszczanski; Ola Alinvi; John P Ball; Kjell Danell. 2007 The effects of substrate manipulations and forest management on predators of saproxylic beetles. Forest Ecology and Management, 242: 518–529
43. Hjältén, J. Lindau, A., Wennström, A., Blomberg, P. Witsell, J. and Hurry, W. 2007. Unintentional changes of defense traits in GM trees can affect plant-herbivore interactions. Basic and Applied Ecology, 8: 434-443
42. Gibb, H. and Hjältén, J. 2007. Effects of low intensity burning after clear-cutting on mid-boreal ant communities in the two years after fire. Journal of Insect Conservation, 11:169-175.
41. Hjältén, J., Johansson, T., Alinvi O, Danell K., Ball J.P., Pettersson R., Gibb, H. and Hilszczanski, J. 2007. The importance of substrate type, shading and scorching for the attractiveness of dead wood to saproxylic beetles. Basic and Applied Ecology 8: 364-376.
40. Alinvi, O, Ball, J.P., Danell, K., Hjältén, J. and Pettersson R. 2007. Sampling saproxylic beetle assemblages in dead wood: comparing window and eclector traps to traditional bark sieving and a refinement. Journal of Insect Conservation, 11:99-112.
39. Johansson, T., Olsson, J., Hjältén, J., Jonsson, B-G. and Ericson, L. 2006. Beetle attraction to sporocarps and wood infected with mycelia of decay fungi in old-growth spruce forests of northern Sweden. Forest Ecology and Management 237: 335-341.
38. Niemi, L., Wennström, A., Hjältén, J. & Ericson, L. 2006. Spatial variation in resistance and virulence in the host-pathogen system Salix triandra-Melampsora amygdalinae. Journal of Ecology 94: 915-921.
37. Gibb, H. Hjältén, J., Ball, J. P., Pettersson, R., Landin, J., Alinvi, O. & Danell K. 2006. Wing loading and habitat selection in forest beetles: Are red-listed species poorer dispersers or more habitat-specific than common congenerics? Biological Conservation 132:250-260.
36. Hjältén, J., O. Atlegrim, F. Sandström, R. Pettersson and E. A. Rexstad. 2006. Effect of wildfire on flat bugs, Aradidae. Entomologica Fennica 17:130-135.
35. Gibb, H., Hjältén, J.,  Ball, J.P., Johansson, T., Atlegrim O., Danell K., Pettersson R. and  Hilszczanski J. 2006. Effect of landscape composition and CWD availability on saproxylic beetle assemblages. Ecography 29: 191-204.
34. Gibb, H., Pettersson R. B., Hjältén, J., Hilszczański, J., Ball, J.P., Johansson, T., Atlegrim, O., Danell, K.2006. Conservation-oriented forestry and early successional saproxylic beetles: An assessment of functional groups on man-made wood substrates. Biological Conservation 129:437-450.
33. Therese Johansson, Heloise Gibb, Jacek Hilszanski, Joakim Hjältén, Ola Atlegrim, John P Ball, Roger Pettersson, Kjell Danell. 2005. Effect of Wood Quality and Forest Type on Bark Beetles and Bark Beetle Predators in Northern Sweden. Canadian Journal of Forest Research 36: 174-185.
32. Olsson, G.E., White, N., Hjältén, J., Juto, P. Palo, R.T. and Ahlm, C. 2005. Habitat factors associated with bank voles (Clethrionomys glareolus) and concomitant hantavirus in northern Sweden. Vector-Borne & Zoonotic Diseases, 5:315-323.
31. Hilszczanski, J., Gibb H., Hjältén J., Johansson, T., Atlegrim O, Ball J.P., Danell K. and Pettersson R. 2005. Saproxylic parasitoids (Hymenoptera, Ichneumonoidea) are affected by forest management and dead wood quality in boreal spruce forest Biological Conservation 126: 456-464.
30. Gibb, H., Ball, J.P., Johansson, T., Hjältén, J.,  Atlegrim O., Danell K., Pettersson R. and  Hilszczanski J. 2005. Dead wood volume and composition in boreal forests under different management regimes in northern Sweden Scandinavian Journal of Forest Research 20:213-222.

POPULAR PUBLICATIONS

13. Johansson, T., Hjältén, J., de Jong, J. & von Stedingk, H. 2009. Generell hänsyn och naturvärdesindikatorer – funktionella metoder för att bevara och bedöma biologisk mångfald i skogslandskapet. Världsnaturfonden WWF, Solna.
12. Hjältén J. Intensivodling och miljömålen. 2009. Biodiverse Nr. pp 10.
11. Hjältén J. Future Forests. 2009. Biodiverse Nr. 10 pp 17.
10. Bengt Gunnar Jonsson, Frank Götmark, Nils Ryman, Gunilla Almered Olsson, Lars Björk, Torbjörn Ebenhard, Joakim Hjältén, Margareta Ihse, Sven Jakobsson, Per Milberg, Sven G. Nilsson, Henrik Smith, Per Wramner. 2008. Skogspolitiken hotar biologiska mångfalden. DN debatt 2008-04-14.
 9. Hjältén J, and Axelsson P. 2008. Miljökonsekvenser av gmo: skogsbruk. In: Förare J. (ed). Kunskapsöversikt avseende miljökonsekvenser av genetiskt modifierade organismer. FORMAS-rapport diarienr 2008-211. (in Swedish) .
 8. Hjältén J, Kjell Danell, Therese Johansson, Heloise Gibb, Ola Alinvi, Roger Pettersson, John Ball, Jacek Hilszczanski 2007. Mångfald gynnar mångfald: värdet av sparad död ved och gamla brukade skogar. Fakta skog 2: 2007 (in Swedish).
 7. Pettersson R., Stenbacka F., Hjältén J., Hilszczanski, J. 2007. New records of the false darkling beetle Phryganophilus ruficollis Fabr. and the braconid wasp Chartobracon huggerti - Ent. Tidskr. 128: 101-105. (in Swedish).
 6. Hjältén, J. Roininen H., Julkunen-Tittto R, Rexstad E., Karlsson J., and Zinojev A. 2006. Biogeographical pattern of diversity, distribution and regulation of arctic willows and insects. Cruise Report, Swedish Polar Research Secretariat.
 5. Atlegrim, O, Ball, J.P., Danell, K., Hjältén, J. and Pettersson R. 2005. Värdet av sparad död ved – en beskrivining av ett forskningsprojekt. Entomologisk tidskrift 126:103-106.