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Publikationer 1983 2019

2004

Mass balance of natural and anthropogenic carbon dioxide flows

Turunen, H., Kobylin, P., Salminen, J., Raudaskoski, R., Suntola, T., Ojala, A., Liukkonen, S., Huttunen, S. & Keiski, R., 2004, Proceeding of the Meeting 'Forests under changing climate, enhanced UV and air pollution': IUFRO 7 Division Forest health Project 7.04.00. Impact of air pollution on forest ecosystems. s. 170-186

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Temporal and spatial variation in methane emissions from a flooded transgression shore of a boreal lake

Kankaala, P., Ojala, A. & Käki, T., 2004, I : Biogeochemistry. 68, s. 297-311

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

2003

Midsummer spatial variation in methane efflux from stands of littoral vegetation in a boreal meso-eutrophic lake

Kankaala, P., Makela, S., Bergstrom, I., Huitu, E., Kaki, T., Ojala, A., Rantakari, M., Kortelainen, P. & Arvola, L., 2003, I : Freshwater Biology. 48, s. 1617-1629 13 s.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Multiphase thermodynamics for CO2 in natural systems

Kobylin, P., Salminen, J., Ojala, A. & Liukkonen, S., 2003, Proceedings of the Sixth Finnish Conference of Environmental Sciences. s. 145-146

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Quality of detritus impacts on spatial variation of methane emissions from littoral sediment of a boreal lake

Kankaala, P., Käki, T. & Ojala, A., 2003, I : Archiv für Hydrobiologie. 157, s. 47-66

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Seasonal CO2 fluxes from a boreal lake: preliminary results with eddy covariance technique and on biological activities

Huotari, J., Ojala, A., Rannik, U., Keronen, P. I. R. & Vesala, T., 2003, Proceedings of the Sixth Finnish Conference of Environmental Sciences. s. 113-116

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Spatial and temporal variation in plant-mediated methane emissions from the littoral zone of boreal lakes

Kankaala, P., Bergström, I., Käki, T. & Ojala, A., 2003, Proceedings of the Sixth Finnish Conference of Environmental Sciences. s. 25-27

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

The role of phosphorus in growth of phytoplankton in Lake Vesijärvi, southern Finland - a multitechnique approach

Ojala, A., Vuorikoski, S. & Kairesalo, T., 2003, I : Aquatic Sciences. 65, s. 287-296

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

2002

Changes in nutrient retention capacity of boreal aquatic ecosystems under climate warming: a simulation study

Kankaala, P., Ojala, A., Tulonen, T. & Arvola, L., 2002, I : Hydrobiologia. 469, s. 67-76

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Eddy covariance measurements of CO2 fluxes from a boreal lake in relation to biological activities

Ojala, A., Huotari, J., Rannik, U., Keronen, P. I. R. & Vesala, T., 2002, Symposium on Atmospheric Aerosols and Trace GAs Exchange Research. Finnish Association for Aerosol Research, s. 48-52 (Report Series in Aerosol Science; nr. 58).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

2001

Diel variation in methane emissions from stands of Phragmites australis (CAV) Trin. Ex Steud. and Typha latifolia L. in a boreal lake

Käki, T., Ojala, A. & Kankaala, P., 2001, I : Aquatic Botany. 71, s. 259-271

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Productivity of Daphnia longispina in a highly humic boreal lake

Ojala, A. & Salonen, K., 2001, I : Journal of Plankton Research. 23, s. 1207-1216

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Responses of perch Perca fluviatilis populations to catchment forest clearcutting and soil scarification in small lakes in eastern Finland

Rask, M., Nyberg, K., Karppinen, C., Markkanen, S-L., Ojala, A., Lehtovaara, A. & Kenttämies, K., 2001, Proceedings of the International Association of Theoretical and Applied Limnology (SIL).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskapligPeer review

2000

Growth and production of bacterioplankton in a deep mesohumic boreal lake

Tulonen, T., Kankaala, P., Arvola, L. & Ojala, A., 2000, I : Archiv für Hydrobiologie. 147, s. 311-325

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Impact of climate change on carbon flux in freshwater ecosystems (CLIMFRESH)

Saarinen, T., Ojala, A. & Kairesalo, T., 2000, I : Lammi Notes. 28, s. 3-4

Forskningsoutput: TidskriftsbidragArtikelVetenskaplig

Methane emissions from a boreal meso-eutrophic lake: an assessment of seasonal and diel variation among emergent vegetation

Ojala, A. & Käki, T., 2000, Proceedings of the International Association of Theoretical and Applied Limnology (SIL). Vol. 27.

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskapligPeer review

1999

Methane emissions from a vegetated littoral zone of the meso-eutrophic Lake Vesijärvi (southern Finland)

Käki, T., Kankaala, P. & Ojala, A., 1999, Proceedings of the Fourth Finnish Conference of Environmental Sciences: Water and Environmental Engineering. . s. 171-173

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

1998

Forestry in catchments: Effects on water quality, plankton, zoobenthos and fish in small lakes

Rask, M., Nyberg, K., Markkanen, S-L. & Ojala, A., 1998, I : Boreal Environment Research. 3, s. 75-86

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Changes in water chemistry and macrophyte and algal communities in experimental ponds simulating climate warming in the boreal area

Kankaala, P., Ojala, A., Tulonen, T., Juha, H. & Arvola, L., 1997, Proceedings of the International Association of Theoretical and Applied Limnology (SIL). Vol. 26.

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskapligPeer review

Methane release from stands of water horsetail (Equisetum fluviatile) in a boreal lake

Hyvönen, T., Ojala, A., Kankaala, P. & Martikainen, P., 1997, I : Freshwater Biology. 40, s. 275-284

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

1996

Carbon budget for the pelagic food web of the euphotic zone of a boreal lake

Kankaala, P., Arvola, L., Tulonen, T. & Ojala, A., 1996, I : Canadian Journal of Fisheries and Aquatic Sciences. 53, s. 1663-1674

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Effects of climate change on freshwater ecosystems

Kankaala, P., Ojala, A., Tulonen, T. & Haapamäki, J., 1996, I : Lammi Notes. 23, s. 4-10

Forskningsoutput: TidskriftsbidragArtikelVetenskaplig

Growth of migrating and non-migrating cryptophytes in thermally and chemically stratified experimental columns

Ojala, A., Heaney, S. I., Arvola, L. & Barbosa, F., 1996, I : Freshwater Biology. 35, s. 599-608

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Impact of climate change on carbon cycle in freshwater ecosystems

Kankaala, P., Ojala, A., Tulonen, T., Haapamäki, J. & Arvola, L., 1996, The Finnish Research Programme on Climate Change. Final Report: Publications of the Academy of Finland 4/96. Helsinki: Edita, s. 196-201

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskaplig

Production of sediment bacteria in the littoral zone of two experimental mesohumic ponds

Tulonen, T., Kankaala, P., Ojala, A. & Arvola, L., 1996, I : Advances in Limnology. 48, s. 217-225

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Suomen kasvihuonekaasujen päästöt ja nielut

Forsius, M., Kankaala, P., Karjalainen, T., Kellomäki, S., Laine, J., Lehtilä, A., Martikainen, P., Ojala, A., Pingoud, K., Pipatti, R., Silvola, J. & Savolainen, I., 1996, Ilmastonmuutos ja Suomi. Yliopistopaino, s. 179-196

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskaplig

Vedet

Arvola, L., Bilaledtin, Ä., Frisk, T., Haapala, J., Huttula, T., Hyvärinen, V., Kallio, K., Kauppi, L., Kuikka, S., Kuivalainen, P., Kuosa, H., Kuusisto, E., Kämäri, J., Lehtonen, H., Lepistö, A., Leppäranta, M., Ojala, A., Rekolainen, S., Varis, O. & Vehviläinen, B., 1996, Ilmastonmuutos ja Suomi. Yliopistopaino, s. 145-178

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskaplig

1995

Effects of catchment forestry on the limnology of small lakes - observations in Kuhmo 1991-1994

Nyberg, K., Rask, M., Markkanen, S-L. & Ojala, A., 1995, Proceedings of the Second Finnish Conference of Environmental Sciences: Microbiological Publications 43/1995. University of Helsinki, s. 297-300

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

Growth of Daphnia longispina L. in a polyhumic lake under various availabilities of algal, bacterial and detrital food.

Ojala, A., Kankaala, P., Kairesalo, T. & Salonen, K., 1995, I : Hydrobiologia. 315, s. 119-134

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Metsätalouden limnologiset vaikutukset: Havaintoja Kuhmon metsäjärviltä vuosina 1991-1994

Rask, M., Markkanen, S-L., Nyberg, K., Ojala, A., Tallberg, P., Makkonen, E. & Liimatainen, H-M., 1995, Metsätalouden vesistövaikutukset ja niiden torjunta: METVE-projektin loppuraportti. Saukkonen, S. & Kenttämies, K. (red.). Suomen ympäristökeskus, s. 241-262 (Suomen ympäristö; nr. 2).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskaplig

Metsätalouden limnologiset vaikutukset: havaintoja Kuhmon metsäjärviltä vuosina 1991-1994.

Rask, M., Markkanen, S-L., Nyberg, K., Ojala, A., Tallberg, P., Makkonen, E. & Liimatainen, H-M., 1995, I : Suomen ympäristö. 2, s. 241-262

Forskningsoutput: TidskriftsbidragArtikelProfessionell

Temperature and carbon dioxide manipulations for climate change studies in a freshwater ecosystem

Kankaala, P., Ojala, A., Tulonen, T., Haapamäki, J. & Arvola, L., 1995, Ecosystem manipulation experiments: scientific approaches, experimental design and relevant results. Proceedings of the Third International Symposium on Ecosystem Manipulation.: Ecosystem Research Report No 20. s. 293-297

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

1994

Factors controlling production of phytoplankton and bacteria under ice in a humic, boreal lake

Tulonen, T., Kankaala, P., Ojala, A. & Arvola, L., 1994, I : Journal of Plankton Research. 16, 10, s. 1411-1432

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Impact of climate change on carbon cycle in freshwater ecosystems

Kankaala, P., Ojala, A., Arvola, L. & Tulonen, T., 1994, The Finnish Research Programme on Climate Change. Second Progress Report.: Publications of the Academy of Finland 1/94. s. 140-145

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskaplig

1993

Effects of light and temperature on the cell size and some biochemical components in two freshwater cryptophytes.

Ojala, A., 1993, I : Nordic Journal of Botany. 13, s. 697-705

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Effects of temperature and irradiance on the growth of two freshwater photosynthetic cryptophytes

Ojala, A., 1993, I : Journal of Phycology. 29, s. 278-284

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Eräiden Kuhmon järvien limnologia ennen valuma-alueiden metsätaloudellisia käsittelyjä

Nyberg, K., Markkanen, S-L., Ojala, A., Rask, M. & Somppi, K., 1993, Metsätalaouden vaikutukset kaloihin ja kalatalouteen: Osahankkeiden raportit vuosien 1990-1992 tuloksista. s. 33-60 (Riista- ja kalatalouden tutkimuslaitos. Kalatutkimuksia ; nr. 69).

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKapitelVetenskaplig

Impacts of climatic change on a mesohumic Finnish lake

Kankaala, P., Ojala, A., Tulonen, T. & Arvola, L., 1993, First Finnish Conference of Environmental Sciences : Environmental Reserch in Finland today. Proceedings.. University of Kuopio, s. 67-69

Forskningsoutput: Kapitel i bok/rapport/konferenshandlingKonferensbidragVetenskaplig

In situ diel DNA synthesis of a Cryptomonas sp. in a hypereutrophic tarn

Ojala, A., 1993, I : Annales Botanici Fennici. 30, s. 119-129

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Spring development and mitotic division pattern of a Cryptomonas sp. in an acidified lake

Ojala, A. & Jones, R. I., 1993, I : European Journal of Phycology. 28, s. 17-24

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

1991

Migration behaviour of three cryptophytes in relation to environmental gradients: an experimental approach

Arvola, L., Ojala, A., Barbosa, F. & Heaney, S. I., 1991, I : British Phycological Journal. 26, s. 361-373

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Studies of growth rates of some freshwater cryptophyte algae

Ojala, A., 1991, Loughborough, UK. 228 s.

Forskningsoutput: AvhandlingDoktorsavhandlingMonografi

1986

Effects of experimental acidification on phyto-. bacterio- and zooplankton in enlosures in a highly humica lake

Arvola, L., Salonen, K., Bergström, I., Heinänen, A. & Ojala, A., 1986, I : Internationale Revue der gesamten Hydrobiologie. 71, 6, s. 737-758

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Happamoitumisen vaikutukset eläinplanktoniin

Ojala, A., 1986, 134 s.

Forskningsoutput: AvhandlingMagisteruppsatsAvhandlingar

The limnology of a small, naturally acidic highly humic forest lake

Rask, M., Heinänen, A., Salonen, K., Arvola, L., Bergström, I., Liukkonen, M. & Ojala, A., 1986, I : Archiv für Hydrobiologie. 106, s. 351-371

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review