PhD students

Current

Rabbil Bhuiyan
(Department of Forest Sciences)
Fine root production in boreal peatlands by applying modified ingrowth core and infrared spectroscopy calibration methods. The aim of the study is to track the root mediated carbon fluxes and develop a model for predicting belowground production and species composition.
Supervisors Kari Minkkinen and Raija Laiho (Natural Resources Institute Finland)
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Annu Kaila
(Natural Resources Institute Finland, PhD to Department of Forest Sciences)
Supervisors Mika Nieminen (Natural Resources Institute Finland) and Harri Vasander
Boris Ťupek
(Department of Forest Sciences, Natural Resources Institute Finland)
Greenhouse gas exchange between the atmosphere and forest ecosystems along a boreal forest-mire hydrological ecotone
1) Quantifying the ecosystem budgets of CO2, CH4, and N2O by focusing on the role of forest floor, including C and N leaching by runoff. ‘Ecosystem hot spots’ are identified using the characteristics of soil, ground vegetation, and forest stand components, and the GHG exchange.
2) Assessing ‘Regional/Landscape hot spot GHG dynamics’ of the continuum of ecosystems across the landscape in relation to environmental factors (e.g. plants, temperature, moisture). A wide range of environmental factors occur along the ecotone between xeric upland forest and water saturated peatland ecosystems, a common boreal landscape pattern.
Studying the dynamics of GHG for nine ecosystems during exceptional conditions (cold/wet – 2004, intermediate – 2005, and warm/dry – 2006) enables long-term budget prediction at the regional/landscape level.
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Former

Maija Lampela
(Department of Forest Sciences)
PhD Thesis: Ecological prerequisites for successful reforestation of degraded tropical peatlands, 2018
Supervisors Jyrki Jauhiainen and Harri Vasander
Anuliina Putkinen
(Natural Resources Institute Finland; PhD to Department of Biosciences)
PhD Thesis: Sphagnum-associated methanotrophs – a resilient CH4 biofilter in pristine and disturbed peatlands, 2018
Supervisors Hannu Fritze (Natural Resources Institute Finland), Eeva-Stiina Tuittila (University of Eastern Finland) and Kim Yrjälä
Mari Könönen
(Department of Forest Sciences)
PhD thesis: Tropical peat decomposability expressed through physical, chemical and biological properties under varying land management intensities, 2017
Supervisors Jyrki Jauhiainen, Raija Laiho (Natural Resources Institute Finland) and Harri Vasander
Markku Koskinen
(Department of Forest Sciences)
PhD thesis: Impacts of restoration of forestry-drained peatlands on nutrient and organic carbon exports and methane dynamics, 2017.
Supervisors Harri Vasander and Tapani Sallantaus (Finnish Environment Institute)
Paul Mathijssen
(Department of Environmental Sciences)
PhD thesis: Holocene carbon dynamics and atmospheric radiative forcing of different types of peatlands in Finland, 2016.
Supervisor Minna Väliranta (University of Helsinki)
Liisa Maanavilja
(Department of Forest Sciences)
PhD thesis: Restoration of ecosystem structure and functioning in boreal spruce swamp forests, 2015
Supervisors Eeva-Stiina Tuittila (University of Eastern Finland, Joensuu) and Janne Kotiaho (University of Jyväskylä)http://www.researchgate.net/profile/Liisa_Maanavilja
Tiina Ronkainen
(Department of Environmental Sciences)
PhD thesis: Plant biomarkers as a proxy to study highly decomposed fen peat, 2015.
Supervisors Minna Väliranta and Eeva-Stiina Tuittila (University of Eastern Finland, Joensuu)
Paavo Ojanen
(Department of Forest Sciences)
PhD thesis Estimation of greenhouse gas balance for forestry-drained peatlands, 2014
Supervisor Kari Minkkinen.
Meeri Pearson
(Finnish Forest Research Institute, Parkano; Department of Forest Sciences)
PhD thesis Maximizing peatland forest regeneration success at lowest cost to the atmosphere: Effects of soil preparation on Scots pine seedling vitality and GHG emissions, 2013
Supervisors Kari Minkkinen, Markku Saarinen (Finnish Forest Research Institute, Parkano) and Jukka Laine (Finnish Forest Research Institute, Parkano)
Päivi Mäkiranta
(Department of Forest Sciences)
PhD Thesis Heterotrophic soil respiration in drained peatlands: Abiotic drivers, and changes after clearfelling and afforestation, 2012
Supervisors Kari Minkkinen, Jyrki Hytönen (Finnish Forest Research Institute, Kannus) and Jukka Laine (Finnish Forest Research Institute, Parkano)
Mirva Leppälä
(Finnish Forest Research Institute, Muhos; University of Oulu)
PhD thesis Successional changes in vegetation and carbon dynamics during boreal mire development, 2011.
Supervisors Eeva-Stiina Tuittila and Jari Oksanen (University of Oulu).
Currently at Metsähallitus.
Petra Straková (formerly Vávřová)
(Department of Forest Sciences)
PhD thesis Carbon dynamics in peatlands under changing hydrology: Effects of water level drawdown on litter quality, microbial enzyme activities and litter decomposition rates, 2010.
Project description
Supervisor Raija Laiho.
Krista Peltoniemi
(Department of Biological and Environmental Sciences)
PhD thesis Aerobic carbon-cycle related microbial communities in boreal peatlands: responses to water-level drawdown, 2010.
Project description
Supervisors Raija Laiho and Hannu Fritze (Finnish Forest Research Institute, Vantaa).
Currently at the Natural Resources Institute Finland, Vantaa.
Soili Kojola
(Department of Forest Ecology)
PhD thesis Kohti hyvää suometsien hoitoa – harvennusten ja kunnostusojitusten vaikutus ojitusaluemänniköiden puuntuotokseen ja metsänkasvatuksen taloustulokseen (Towards best management of drained peatland forests – Impacts of different silvicultural regimes on the growth and yield of Scots pine stands), 2009.
Supervisors Hannu Hökkä (Finnish Forest Research Institute, Rovaniemi), Raija Laiho and Anssi Ahtikoski (Finnish Forest Research Institute, Rovaniemi).
Currently at the Natural Resources Institute Finland, Vantaa.
Terhi Riutta
(Department of Forest Ecology)
PhD thesis Fen ecosystem carbon dynamics in changing hydrological conditions, 2008.
Supervisors Eeva-Stiina Tuittila and Jukka Laine (Finnish Forest Research Institute, Parkano).
Currently at the University of Oxford.

Sakari Sarkkola
PhD thesis Stand structural dynamics on pristine and managed boreal peatlands, 2006.
Supervisors Hannu Hökkä (Finnish Forest Research Institute, Rovaniemi), Juhani Päivänen and Raija Laiho.
Currently at the Finnish Forest Research Institute, Vantaa.

Niko Silvan
PhD thesis Nutrient retention in a restored peatland buffer, 2004.
Supervisors Jukka Laine, Harri Vasander and Eeva-Stiina Tuittila.
Currently at the Finnish Forest Research Institute, Parkano.