BVOC emissions, synthesis, storages, stem VOC's
My research focuses on volatile organic compound (VOC) emissions from boreal forests. I'm especially interested on the emissions from woody plant parts such as living tree stems and how they vary temporally and spatially. I also study how VOC synthesis, storages and emissions are linked to each other and how they change during the annual cycle.
Photosynthesis, gas exchanges, remote sensing
My background is essentially on plant physiology and light, and my research is focused to characterize the temporal dynamics in biochemical and biophysical mechanisms in Scots pine (Pinus sylvestris L.) needles, that uncouple remote sensed data from the photosynthetic gas exchange.
Ecosystem ecology, Carbon and Nitrogen budgets of forest - peatland ecotone, Tropospheric ozone
I am studying the effects of drought on CO2, CH4, and N2O dynamics along a boreal forest/mire ecotone. The ecotone is an ecological tension between habitats. In forest/mire transition, below-ground features of poorly drained peatlands overlap with the above-ground features of well drained forests.
Greenhouse gas dynamics of forest/mire transitions are poorly known, because of the relatively narrow extent between forests and peatlands. Although in the scale of boreal forest, the forest/mire transition covers large areas. For example in Finland the forest/mire transition covers approximately 3.1 Million ha, or 14 % of the total forest area.
Methane emissions in boreal forest, methanogenic microbes
In my thesis, I study the methane emissions of a boreal forest, focusing on the role of vegetation. The aim of my research is to reveal the biological sources of methane and identify methanogenic microbes in the soil and vegetation. Chamber measurements are the principal method in use.
Nitrogen cycling in boreal forests, gas exchange between forests and the atmosphere
My research interest is in the interactions between forest plants, forest soil and the atmosphere. My goal is to answer theoretical questions, such as: “What is the role of roots and rhizosphere on decomposition of organic material in soil?”, and “What is the importance of nitrogen deposition on nutrient cycling in forests and greenhouse gas fluxes?”. Tools for this are theory construction based on theoretical understanding, field measurements and in some extend process based modeling. Functional balance of trees and elemental mass balances are fundamental concepts in my research. As a special topic, I am working on how to improve the reliability of chamber measurement techniques
O3 and NOx interactions with foliage
My thesis work is on O3 and NOx interactions with foliage: improving current knowledge and models. I also work at AnaEE (Analysis and Experimentation on Ecosystems) a European infrastructure for experimental ecosystem research in its preparatory phase.
Conifer oleoresin, resin dynamics, stem VOCs, tree water relations
In my PhD project I concentrate on conifer oleoresin: on it's dynamics and role in ecosystem. More precisely I look into the oleoresin based defence reactions in a tree, and it's effects on the stem VOC emissions. Also, the dynamics of oleoresin under different moisture and climatic conditions are a part of the project.
Tree root carbon dynamics in boreal forests
My research interest is tree root carbon dynamics and their role in the whole tree carbon balance in boreal forest ecosystem. The aim of my research is to quantify and model the carbon-related processes in pine rootsin the framework of the whole tree carbon balance and to study tree carbon dynamics in future climate conditions.
Forest tree ecophysiology, nutrient balance
My main topic of study is carbohydrate and nitrogen balance between Pinus sylvestris and forest soil, and how these balances are modified by changing environment conditions. I am also developing different laboratory protocols, mainly biochemical analyses of pine needles.
Leaf optical properties
During my PhD and as a member of FLUO-SYNTHESIS project, I study the variation in leaf optical properties (absorption, fluorescence and reflectance spectra) across species, light gradients and in response to multiple sources of stress.
Phloem transport, xylem transport, pathogen effects on tree water relations
I am working on phloem and xylem transport at the level of the whole tree physiology. Currently I am investigating the development of water transport capacity in a pine trunk in the spring, after soil thaw. I am also initiating a study on the effects of blue-stain fungi on the water transport in spruce seedlings.
Energy exchange, dissolved organic carbon, DOC production, boreal forest
In my thesis I research the role of vegetation cover in the energy exchange between the atmosphere and a terrestrial ecosystem. I am interested in how phenology affects the processes related to energy exchange and how ecosystems differ in this respect.
In addition I model the production of DOC (Dissolved Organic Carbon) and its transport into stream water in a boreal forest. In developing the model, I use data collected from intensively researched catchments in Finland and Sweden. I am also interested in the biogeochemical processes linked to the DOC cycle and have done reserach on the role of photochemistry in the breakdown of DOC transported by big rivers.