Current issue: 54(1)

Under compilation: 54(2)

Impact factor 1.683
5-year impact factor 1.950
Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles by Jarmo Holopainen

Category: Research article

article id 681, category Research article
Virpi Palomäki, Alpo Hassinen, Matti Lemettinen, Timo Oksanen, Heljä-Sisko Helmisaari, Jarmo Holopainen, Seppo Kellomäki, Toini Holopainen. (1998). Open-top chamber fumigation system for exposure of field grown Pinus sylvestris to elevated carbon dioxide and ozone concentration. Silva Fennica vol. 32 no. 3 article id 681. https://doi.org/10.14214/sf.681
An open-top chamber fumigation system was built in a young Scots pine stand to study the effects of realistic elevated ozone (O3) and carbon dioxide (CO2) concentrations and their combination on trees in natural conditions. Doubled CO2 concentration compared to present ambient concentration, and O3 concentration between 40 ppb and 70 ppb in the first study year (1994) and doubled O3 concentration in years 1995 and 1996 were the target concentrations in the chambers. The O3 concentration in the chambers was successfully maintained close to the target concentration and differences between chambers were small. The mean CO2 concentration in the CO2 treatment was ca. 100 ppm below the target, but was maintained at this level throughout the growing season. Two degrees higher mean air temperature and slightly lower light intensity compared to open air were measured in the chambers. The operation of the fumigation system was satisfactory during the three study years and repeatability of the gas treatments can be regarded good in this low cost exposure system.
  • Palomäki, University of Kuopio, Department of Ecology and Environmental Science, P.O.Box 1627, FIN-70211 Kuopio, Finland ORCID ID:E-mail: virpi.palomaki@uku.fi (email)
  • Hassinen, Mekrijärvi Research Station, FIN-82900 Ilomantsi, Finland ORCID ID:E-mail:
  • Lemettinen, Mekrijärvi Research Station, FIN-82900 Ilomantsi, Finland ORCID ID:E-mail:
  • Oksanen, University of Kuopio, Department of Ecology and Environmental Science, P.O.Box 1627, FIN-70211 Kuopio, Finland ORCID ID:E-mail:
  • Helmisaari, Finnish Forest Research Institute, Department of Forest Ecology, P.O.Box 18, FIN-01301 Vantaa, Finland ORCID ID:E-mail:
  • Holopainen, Agricultural Research Centre, FIN-31600 Jokioinen, Finland ORCID ID:E-mail:
  • Kellomäki, University of Joensuu, Faculty of Forestry, P.O.Box 111, FIN-80101 Joensuu, Finland ORCID ID:E-mail:
  • Holopainen, University of Kuopio, Department of Ecology and Environmental Science, P.O.Box 1627, FIN-70211 Kuopio, Finland ORCID ID:E-mail:

Category: Article

article id 5585, category Article
Päivi Lyytikäinen, Jarmo K. Holopainen, Pirjo Kainulainen, Anne Nerg, Seppo Neuvonen, Tarmo Virtanen. (1996). Performance of pine sawflies under elevated tropospheric ozone. Silva Fennica vol. 30 no. 2–3 article id 5585. https://doi.org/10.14214/sf.a9230

Concentration of the phytotoxic air pollutant, ozone (O3) is continually increasing in the lower layer of the troposphere. The purpose of this study was to compare performance of pine sawflies on Scots pine (Pinus sylvestris L.) seedlings in ambient and future levels of ozone. Scots pine seedlings were grown in field fumigation system where the ozone doses in fumigated plots were 1.5–1.6 times the ambient level. Larvae of the European pine sawfly (Neodiprion sertifer Geoffroy and Gilpinia pallida Klug) were reared on the foliage of Scots pine. The levels of resin acids and monoterpenes in foliage were analysed. There were no significant effects of ozone fumigation on sawfly performance or levels of defence compounds in pine foliage. The results suggest that the elevated ozone concentrations do not strongly affect the needle quality of young Scots pine and the importance of these two diprionid sawfly species forest pests.

  • Lyytikäinen, ORCID ID:E-mail:
  • Holopainen, ORCID ID:E-mail:
  • Kainulainen, ORCID ID:E-mail:
  • Nerg, ORCID ID:E-mail:
  • Neuvonen, ORCID ID:E-mail:
  • Virtanen, ORCID ID:E-mail:

Register
Click this link to register for Silva Fennica submission and tracking system.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content
Your selected articles

Committee on Publication Ethics A Trusted Community-Governed Archive