Search Results - "Virtanen, R."

Impact of shrub canopies on understorey vegetation in western Eurasian tundra by Pajunen, A.M., Oksanen, J., Virtanen, R.

“…Question: How does the composition and species richness of understorey vegetation associate with changing abundance of deciduous shrub canopies? What are the…”
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Soil net nitrogen mineralisation across global grasslands by Risch, A. C., Zimmermann, S., Ochoa-Hueso, R., Schütz, M., Frey, B., Firn, J. L., Fay, P. A., Hagedorn, F., Borer, E. T., Seabloom, E. W., Harpole, W. S., Knops, J. M. H., McCulley, R. L., Broadbent, A. A. D., Stevens, C. J., Silveira, M. L., Adler, P. B., Báez, S., Biederman, L. A., Blair, J. M., Brown, C. S., Caldeira, M. C., Collins, S. L., Daleo, P., di Virgilio, A., Ebeling, A., Eisenhauer, N., Esch, E., Eskelinen, A., Hagenah, N., Hautier, Y., Kirkman, K. P., MacDougall, A. S., Moore, J. L., Power, S. A., Prober, S. M., Roscher, C., Sankaran, M., Siebert, J., Speziale, K. L., Tognetti, P. M., Virtanen, R., Yahdjian, L., Moser, B.

“…Soil nitrogen mineralisation (N min ), the conversion of organic into inorganic N, is important for productivity and nutrient cycling. The balance between…”
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Biodiversity Differences between Managed and Unmanaged Forests: Meta-Analysis of Species Richness in Europe by PAILLET, YOAN, BERGÈS, LAURENT, HJÄLTÉN, JOAKIM, ÓDOR, PÉTER, AVON, CATHERINE, BERNHARDT-RÖMERMANN, MARKUS, BIJLSMA, RIENK-JAN, DE BRUYN, LUC, FUHR, MARC, GRANDIN, ULF, KANKA, ROBERT, LUNDIN, LARS, LUQUE, SANDRA, MAGURA, TIBOR, MATESANZ, SILVIA, MÉSZÁROS, ILONA, SEBASTIÀ, M.-TERESA, SCHMIDT, WOLFGANG, STANDOVÁR, TIBOR, TÓTHMÉRÉSZ, BÉLA, UOTILA, ANNELI, VALLADARES, FERNANDO, VELLAK, KAI, VIRTANEN, RISTO

“…Past and present pressures on forest resources have led to a drastic decrease in the surface area of unmanaged forests in Europe. Changes in forest structure,…”
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Nutrients cause grassland biomass to outpace herbivory by Borer, E. T., Harpole, W. S., Adler, P. B., Arnillas, C. A., Bugalho, M. N., Cadotte, M. W., Caldeira, M. C., Campana, S., Dickman, C. R., Dickson, T. L., Donohue, I., Eskelinen, A., Firn, J. L., Graff, P., Gruner, D. S., Heckman, R. W., Koltz, A. M., Komatsu, K. J., Lannes, L. S., MacDougall, A. S., Martina, J. P., Moore, J. L., Mortensen, B., Ochoa-Hueso, R., Olde Venterink, H., Power, S. A., Price, J. N., Risch, A. C., Sankaran, M., Schütz, M., Sitters, J., Stevens, C. J., Virtanen, R., Wilfahrt, P. A., Seabloom, E. W.

“…Human activities are transforming grassland biomass via changing climate, elemental nutrients, and herbivory. Theory predicts that food-limited herbivores will…”
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Drivers of the microbial metabolic quotient across global grasslands by Risch, A. C., Zimmermann, S., Schütz, M., Borer, E. T., Broadbent, A. A. D., Caldeira, M. C., Davies, K. F., Eisenhauer, N., Eskelinen, A., Fay, P. A., Hagedorn, F., Knops, J. M. H., Lembrechts, J. J., MacDougall, A. S., McCulley, R. L., Melbourne, B. A., Moore, J. L., Power, S. A., Seabloom, E. W., Silviera, M. L., Virtanen, R., Yahdjian, L., Ochoa‐Hueso, R.

“…Aim The microbial metabolic quotient (MMQ; mg CO2‐C/mg MBC/h), defined as the amount of microbial CO2 respired (MR; mg CO2‐C/kg soil/h) per unit of microbial…”
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Pharmacological characterization and CNS effects of a novel highly selective α 2C ‐adrenoceptor antagonist JP‐1302 by Sallinen, J, Höglund, I, Engström, M, Lehtimäki, J, Virtanen, R, Sirviö, J, Wurster, S, Savola, J‐M, Haapalinna, A

“…Background and purpose: Pharmacological validation of novel functions for the α 2A ‐, α 2B ‐, and α 2C ‐adrenoceptor (AR) subtypes has been hampered by the…”
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Land use impacts on stream community composition and concordance along a natural stress gradient by Tolkkinen, M.J., Mykrä, H., Virtanen, R., Tolkkinen, M., Kauppila, T., Paasivirta, L., Muotka, T.

“…•We studied land use effects on lotic communities along a natural acidity gradient.•Natural acidity affected communities more than did land use (forest…”
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Effects of grazing on above-ground biomass on a mountain snowbed, NW Finland by Virtanen, Risto

“…The effects of grazing by the Norwegian lemming (Lemmus lemmus) and reindeer (Rangifer tarandus) on biomass and vegetation structure in a mountain snowbed…”
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Author Correction: Nutrients cause grassland biomass to outpace herbivory by Borer, E. T., Harpole, W. S., Adler, P. B., Arnillas, C. A., Bugalho, M. N., Cadotte, M. W., Caldeira, M. C., Campana, S., Dickman, C. R., Dickson, T. L., Donohue, I., Eskelinen, A., Firn, J. L., Graff, P., Gruner, D. S., Heckman, R. W., Koltz, A. M., Komatsu, K. J., Lannes, L. S., MacDougall, A. S., Martina, J. P., Moore, J. L., Mortensen, B., Ochoa-Hueso, R., Venterink, H. Olde, Power, S. A., Price, J. N., Risch, A. C., Sankaran, M., Schütz, M., Sitters, J., Stevens, C. J., Virtanen, R., Wilfahrt, P. A., Seabloom, E. W.

“…A Correction to this paper has been published: https://doi.org/10.1038/s41467-021-20985-z…”
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Compositional differentiation, vegetation-environment relationships and classification of willow-characterised vegetation in the western Eurasian Arctic by Pajunen, A.M., Kaarlejärvi, E.M., Forbes, B.C., Virtanen, R.

“…Question: How does willow-characterised tundra vegetation of western Eurasia vary, and what are the main vegetation types? What are the ecological gradients…”
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Changing headache from preschool age to puberty. A controlled study by Virtanen, R, Aromaa, M, Rautava, P, Metsähonkala, L, Anttila, P, Helenius, H, Sillanpää, M

“…The characteristics of disturbing primary headache and the occurrence of headache types were studied by sending a questionnaire to 1132 Finnish families of…”
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Red Deer Management and Vegetation on the Isle of Rum by Virtanen, R., Edwards, G. R., Crawley, M. J.

“…1. Understanding the effects of red deer Cervus elaphus grazing on a range of plant communities is important for formulating guidelines for the management of…”
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Pharmacological profiles of medetomidine and its antagonist, atipamezole by Virtanen, R

“…Medetomidine, (+/-)-4-[1-(2,3-dimethylphenyl)ethyl]-1H-imidazole, is a very potent, selective and specific full agonist at both pre- and postsynaptic alpha…”
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Rescuing Valuable Arctic Vegetation Data for Biodiversity Models, Ecosystem Models and a Panarctic Vegetation Classification by Walker, D.A., Alsos, I.G., Bay, C., Boulanger-Lapointe, N., Breen, A.L., Bültmann, H., Christensen, T., Damgaard, C., Daniëls, F.J.A., Hennekens, S., Raynolds, M.K., Le Roux, P.C., Luoto, M., Pellissier, L., Peet, R.K., Schmidt, N.M., Stewart, L., Virtanen, R., Yoccoz, N.G., Wisz, M.S.

“…Two workshops held in Roskilde, Denmark, on 29 - 31 May and 17 - 19 December 2012, brought together key Arctic vegetation scientists and bio-diversity modelers…”
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Compromises in Data Selection in a Meta-Analysis of Biodiversity in Managed and Unmanaged Forests: Response to Halme et al by PAILLET, YOAN, BERGÈS, LAURENT, HJÄLTÉN, JOAKIM, ÓDOR, PÉTER, AVON, CATHERINE, BERNHARDT-RÖMERMANN, MARKUS, BIJLSMA, RIENK-JAN, DE BRUYN, LUC, FUHR, MARC, GRANDIN, ULF, KANKA, ROBERT, LUNDIN, LARS, LUQUE, SANDRA, MAGURA, TIBOR, MATESANZ, SILVIA, MÉSZÁROS, ILONA, SEBASTIÀ, M.-TERESA, SCHMIDT, WOLFGANG, STANDOVÁR, TIBOR, TÓTHMÉRÉSZ, BÉLA, UOTILA, ANNELI, VALLADARES, FERNANDO, VELLAK, KAI, VIRTANEN, RISTO

“…This paper is a reply to the criticisms formulated by Halme et al. against a meta-analysis dealing with the effects of forest management on biodiversity. We…”
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Changes in headache prevalence between pre-school and pre-pubertal ages by Virtanen, R, Aromaa, M, Rautava, P, Metsähonkala, L, Anttila, P, Helenius, H, Sillanpää, M

“…The prevalence rates of headache in first-born children were determined at the ages of 6 and 12 years in over 1000 families. A headache questionnaire was…”
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Bryophyte Biomass and Species Richness on the Park Grass Experiment, Rothamsted, UK by Virtanen, R., Johnston, A. E., Crawley, M. J., Edwards, G. R.

“…The relationships between bryophyte biomass and species richness and soil pH, nutrient applications and vascular plant biomass and species richness were…”
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Impact of grazing and neighbour removal on a heath plant community transplanted onto a snowbed site, NW Finnish Lapland by Virtanen, R. (Oulu Univ. (Finland). Dept. of Biology)

“…A transplant experiment was carried out to test hypotheses on forces organizing plant communities in a mountain snowbed. Particularly the roles of competition…”
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Oral ulcers in AIDS patients frequently associated with cytomegalovirus (CMV) and Epstein-Barr virus (EBV) infections by Syrjänen, S., Leimola-Virtanen, R., Schmidt-Westhausen, A., Reichart, P. A.

“…Oral ulcers are common in AIDS patients, with a wide spectrum of underlying causes, including different viruses. In the present study, the presence of…”
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The effect of hormone replacement therapy on salivary calcium concentrations in menopausal women by Sewón, L, Laine, M, Karjalainen, S, Leimola-Virtanen, R, Hiidenkari, T, Helenius, H

“…Hormone replacement therapy in menopausal women is known to affect the general calcium turnover of the body. No information is available about the effects of…”
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