Search Results - "J. Tahvanainen"

Space and Shelter Requirement of Nymphs in the Mass-Rearing of the Edible Ruspolia differens (Orthoptera: Tettigoniidae) by Lehtovaara, V. J., Tahvanainen, J., Sorjonen, J., Valtonen, A., Roininen, H.

“…The ability to mass-rear insects in high densities is a precondition for the edible insect industry but the space requirement has to be determined specifically…”
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Effects of elevated CO2 and temperature on plant growth and herbivore defensive chemistry by VETELI, T. O., KUOKKANEN, K., JULKUNEN-TIITTO, R., ROININEN, H., TAHVANAINEN, J.

“…Concentration of atmospheric CO2 and temperature have both been rising for the last three decades. In this century, the temperature has been predicted to rise…”
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Shading enhances the quality of willow leaves to leaf beetles but does it matter? by Sipura, Mika, Tahvanainen, Jorma

“…Plant shading is commonly recognised as a factor, which increases susceptibility of plants to attack by herbivorous insects. In this study we experimentally…”
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Interactions between Willows and Insect Herbivores under Enhanced Ultraviolet-B Radiation by T. O. Veteli, R. Tegelberg, Pusenius, J., M. Sipura, Julkunen-Tiitto, R., Aphalo, P. J., J. Tahvanainen

“…We studied the effects of elevated ultraviolet-B radiation on interactions between insect herbivores and their host plants by exposing two species of…”
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Chlorogenic acid as an antiherbivore defence of willows against leaf beetles by Ikonen, Arsi, Tahvanainen, Jorma, Roininen, Heikki

“…In the leaves of 13 Finnish willow species, the content of a phenolic, chlorogenic acid, was found to vary from 0 up to 18 mg g−1 D.W. Effects of pure…”
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effects of elevated CO₂ and temperature on the resistance of winter-dormant birch seedlings (Betula pendula) to hares and voles by Kuokkanen, K, Niemela, P, Matala, J, Julkunen-Tiitto, R, Heinonen, J, Rousi, M, Henttonen, H, Tahvanainen, J, Kellomaki, S

“…The effects of elevated CO2 and temperature on the resource allocation pattern and resistance against mammalian herbivores of silver birch (Betula pendula…”
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Increased CO2 and nutrient status changes affect phytomass and the production of plant defensive secondary chemicals in Salix myrsinifolia (Salisb.) by Julkunen-Tiitto, R. (Joensuu Univ. (Finland). Dept. of Biology), Tahvanainen, J, Silvola, J

“…The effect of CO2 enrichment (700 and 1050 ppm) on phytomass, soluble sugars, leaf nitrogen and secondary chemicals of three Salix myrsinifolia clones was…”
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Phenolic glycosides govern the food selection pattern of willow feeding leaf beetles by Tahvanainen, J, Julkunen-Titto, R, Kettunen, J

“…The relationship between the food selection of four leaf beetle species (Phratora vitellinae, Plagiodera versicolora, Lochmaea capreae, Galerucella lineola)…”
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Host selection and larval performance of two willow-feeding sawflies by Roininen, Heikki, Tahvanainen, Jorma

“…Host selection by ovipositing females and larval performance of two willowfeeding sawflies, Nematus salicis and N. pavidus, were investigated in laboratory…”
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Why does the bud-galling sawfly, Euura mucronata, attack long shoots? by Price, P.W, Roininen, H, Tahvanainen, J

“…The bud-galling sawfly, Euura mucronata, attacked longer shoot length classes on its host, Salix cinerea, more frequently than shorter shoots. Shoot length…”
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Phenolic compounds of willow bark as deterrents against feeding by mountain hare by Tahvanainen, J, Helle, E, Julkunen-Titto, R, Lavola, A

“…Overwintering mountain hares (Lepus timidus) fed selectively on the shoots of a number of northern willow (Salix spp.) species. The hares preferred certain…”
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Profitability of willow cultivation for energy production in Finland by Toivonen, Ritva M., Tahvanainen, Liisa J.

“…This paper focuses on short rotation willows as a potential renewable energy source in Finland. The aim of the study was to evaluate the profitability of…”
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Plant age and attack by the bud galler, Euura mucronata by Price, P.W, Roininen, H, Tahvanainen, J

“…As ramets of the willow, Salix cinerea L. (Salicaceae) aged shoot length decreased in the six populations studied in S.E. Finland. Many traits correlated…”
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Effects of shading and fertilization on resistance of winter-dormant birch (Betula pendula) to voles and hares by Rousi, Matti, Tahvanainen, Jorma, Henttonen, Heikki, Uotila, Ilari

“…Seedling representing four families of European white birch (Betula pendula) were grown through their first growing season in two fertilization and three…”
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A mechanism of resistance to hare browsing in winter-dormant European white birch (Betula pendula) by Rousi, M. (Finnish Research Institute, Punkaharju, Finland), Tahvanainen, J, Uotila, I

“…The palatability of the birch Betula pendula to the snowshoe hare Lepus timidus differed considerably depending on geographical origin and family. The…”
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Colonization and extinction in a population of the shoot-galling sawfly, Euura amerinae [plant age, long term] by Roininen, H, Price, P.W, Tahvanainen, J

“…The shoot-galling sawfly, Euura amerinae, usually attacks only young trees of Salix pentandra. Similar patterns of attack by other herbivores on plants have…”
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The effect of silver birch (Betula pendula) powder on physiological performance of field voles (Microtus agrestis) by Harju, A., Tahvanainen, J.

“…Many northern arvicoline rodents consume bark of woody plants in times of high population densities. However, the significance of this behaviour to voles…”
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Extubation criteria after weaning from intermittent mandatory ventilation and continuous positive airway pressure by Tahvanainen, J, Salmenperä, M, Nikki, P

“…The "traditional" weaning criteria, arterial blood gases, and a number of other physiologic variables were measured in 47 patients to evaluate to what extent…”
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Use of host plants by Operopthera brumata L. (Lep., Geometridae) during the first recorded outbreak in the subcontinental boreal zone of Fennoscandia by Tikkanen, O.-P., Roininen, H., Niemelä, P., Tahvanainen, J., Zinovjev, A.

“…: The first known outbreak of Operopthera brumata in the subcontinental boreal zone was found in 1994. In the summer of 1995 use of the host plants by O…”
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Can central venous blood replace mixed venous blood samples? by Tahvanainen, J, Meretoja, O, Nikki, P

“…To estimate the value of central venous blood as representative of real changes in pulmonary shunt (Qsp/Qt), mixed venous oxygen saturation and arteriovenous…”
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