Search Results - "Ilvesniemi, H"

Recovery of galactoglucomannan from wood hydrolysate using regenerated cellulose ultrafiltration membranes by Al Manasrah, M., Kallioinen, M., Ilvesniemi, H., Mänttäri, M.

“…► Regenerated cellulose membranes showed high potential to recover galactoglucomannan (GGM) from spruce sawdust hydrolysate. ► By the 5kDa regenerated…”
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Nitrogen balance of a boreal Scots pine forest by Korhonen, J. F. J, Pihlatie, M, Pumpanen, J, Aaltonen, H, Hari, P, Levula, J, Kieloaho, A.-J, Nikinmaa, E, Vesala, T, Ilvesniemi, H

“…The productivity of boreal forests is considered to be limited by low nitrogen (N) availability. Increased atmospheric N deposition has altered the functioning…”
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Evidence for soil water control on carbon and water dynamics in European forests during the extremely dry year: 2003 by Granier, A., Reichstein, M., Bréda, N., Janssens, I.A., Falge, E., Ciais, P., Grünwald, T., Aubinet, M., Berbigier, P., Bernhofer, C., Buchmann, N., Facini, O., Grassi, G., Heinesch, B., Ilvesniemi, H., Keronen, P., Knohl, A., Köstner, B., Lagergren, F., Lindroth, A., Longdoz, B., Loustau, D., Mateus, J., Montagnani, L., Nys, C., Moors, E., Papale, D., Peiffer, M., Pilegaard, K., Pita, G., Pumpanen, J., Rambal, S., Rebmann, C., Rodrigues, A., Seufert, G., Tenhunen, J., Vesala, T., Wang, Q.

“…The drought of 2003 was exceptionally severe in many regions of Europe, both in duration and in intensity. In some areas, especially in Germany and France, it…”
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Effect of thinning on surface fluxes in a boreal forest by Vesala, T., Suni, T., Rannik, Ü., Keronen, P., Markkanen, T., Sevanto, S., Grönholm, T., Smolander, S., Kulmala, M., Ilvesniemi, H., Ojansuu, R., Uotila, A., Levula, J., Mäkelä, A., Pumpanen, J., Kolari, P., Kulmala, L., Altimir, N., Berninger, F., Nikinmaa, E., Hari, P.

“…Thinning is a routine forest management operation that changes tree spacing, number, and size distribution and affects the material flows between vegetation…”
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Predicting the decline in daily maximum transpiration rate of two pine stands during drought based on constant minimum leaf water potential and plant hydraulic conductance by Duursma, R A, Kolari, P, Perämäki, M, Nikinmaa, E, Hari, P, Delzon, S, Loustau, D, Ilvesniemi, H, Pumpanen, J, Mäkelä, A

“…The effect of drought on forest water use is often estimated with models, but comprehensive models require many parameters, and simple models may not be…”
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The effect of roots and easily available carbon on the decomposition of soil organic matter fractions in boreal forest soil by Pumpanen, J., Lindén, A., Bruckman, V. J., Berninger, F., Ilvesniemi, H., Oinonen, M., Sonninen, E., Kukumägi, M., Heinonsalo, J.

“…The priming effect induced by carbon (C) that is easily available to microbes has been shown to increase the mineralization of soil organic matter (SOM) that…”
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The effects of soil and air temperature on CO2 exchange and net biomass accumulation in Norway spruce, Scots pine and silver birch seedlings by Pumpanen, Jukka, Heinonsalo, Jussi, Rasilo, Terhi, Villemot, Julie, Ilvesniemi, Hannu

“…Soil temperature is proposed to affect the photosynthetic rate and carbon allocation in boreal trees through sink limitation. The aim of this study was to…”
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Microbial activity during summer in humus layers under Pinus silvestris and Alnus incana by Niemi, R.M., Vepsäläinen, M., Erkomaa, K., Ilvesniemi, H.

“…In this work we investigated changes in the originally similar humus layers under coniferous and deciduous trees after a 40-year growth period of trees. We…”
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N natural abundance of foliage and soil across boreal forests of Finland by Sah, S. P, Rita, H, Ilvesniemi, H

“…This study presents the latitudinal variation (from 60° 30' N to 68° 2' N latitude) of natural abundances of ¹⁵N in the foliage, humus and soils of boreal…”
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Filter centrifugation as a sampling method for miniaturization of extracellular fungal enzyme activity measurements in solid media by Heinonsalo, J., Kabiersch, G., Niemi, R.M., Simpanen, S., Ilvesniemi, H., Hofrichter, M., Hatakka, A., Steffen, K.T.

“…A novel sampling method to evaluate extracellular fungal enzyme activities was developed and the validity tested for agar media. The method is based on…”
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Tree stem diameter variations and transpiration in Scots pine: an analysis using a dynamic sap flow model by Perämäki, M, Nikinmaa, E, Sevanto, S, Ilvesniemi, H, Siivola, E, Hari, P, Vesala, T

“…A dynamic model for simulating water flow in a Scots pine (Pinus sylvestris L.) tree was developed. The model is based on the cohesion theory and the…”
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Model analysis of the effects of soil age, fires and harvesting on the carbon storage of boreal forest soils by LISKI, J., ILVESNIEMI, H., MÄKELÄ, A., STARR, M.

“…Summary Potential causes for changes in the amounts of carbon (C) stored in the soils of boreal forests were studied by measuring the C in the soil along a…”
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Distribution and mobilization of Al, Fe and Si in three podzolic soil profiles in relation to the humus layer by Giesler, R., Ilvesniemi, H., Nyberg, L., van Hees, P., Starr, M., Bishop, K., Kareinen, T., Lundström, U.S.

“…The mobilization of Al, Fe and Si in podzols is often associated with the weathering of silicate minerals in the E horizon, downward migration, and their…”
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Water Retention Capacity in Coarse Podzol Profiles Predicted from Measured Soil Properties by Mecke, M., Westman, C. J., Ilvesniemi, H.

“…Fennoscandian podzols consist of coarse parent materials with a strongly developed secondary structure in the Spodic B‐horizons. For such materials, predictive…”
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An open chamber system for measuring soil surface CO2 efflux: Analysis of error sources related to the chamber system by Pumpanen, J., Ilvesniemi, H., Keronen, P., Nissinen, A., Pohja, T., Vesala, T., Hari, P.

“…An open dynamic chamber is a widely used method for soil CO2 efflux measurements. However, any uncontrolled air flow between the inside and outside of the…”
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15N natural abundance of foliage and soil across boreal forests of Finland by SAH, S. P, RITA, H, ILVESNIEMI, H

“…This study presents the latitudinal variation (from 60° 30′ N to 68° 2′ N latitude) of natural abundances of 15N in the foliage, humus and soils of boreal…”
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Water retention capacity in coarse podzol profiles predicted from measured soil properties by MECKE, M, WESTMAN, C. J, ILVESNIEMI, H

“…Fennoscandian podzols consist of coarse parent materials with a strongly developed secondary structure in the Spodic B-horizons. For such materials, predictive…”
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Interspecific variation and impact of clear-cutting on natural 15N abundance and N concentration in the needle-to-soil continuum of a boreal conifer forest by Sah, S.P.,University of Helsinki (Finland). Dept. of Forest Ecology, Ilvesniemi, H.,The Finnish Forest Research Inst., Vantaa (Finland)

“…The objective of this paper was to study the interspecific variation of 15N natural abundance in two dominant conifer tree species, Pinus sylvestris and Picea…”
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General description of the sampling techniques and the sites investigated in the Fennoscandinavian podzolization project by Ilvesniemi, Hannu, Giesler, Reiner, van Hees, Patrick, Magnussson, Tord, Melkerud, Per Arne

“…A 3-year project focusing on the fundamental processes of podzolization was carried out on three sampling sites in northern Fennoscandinavia. The soils were…”
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Critical loads of acidic deposition for forest soils. Is the current approach adequate? by Loekke, H. (Miljoestyrelsen, Silkeborg (Denmark)), Bak, J, Falkengren-Grerup, U, Finlay, R.D, Ilvesniemi, H, Holm Nygaard, P, Starr, M

“…On a European scale, the critical load concept has been generally accepted as the basis for abatement strategies to reduce or prevent damage to the functioning…”
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