A5044437099- Plant responses to elevated CO2
- Light effects on plants
- Lichen and fungal ecology
- Forest Ecology and Biodiversity Studies
- Ecology and Vegetation Dynamics Studies
- Botany and Plant Ecology Studies
- Mycorrhizal Fungi and Plant Interactions
- Plant and animal studies
- Plant Water Relations and Carbon Dynamics
- Forest Insect Ecology and Management
- Biocrusts and Microbial Ecology
- Fire effects on ecosystems
- Forest ecology and management
- Polar Research and Ecology
- Atmospheric chemistry and aerosols
- Forest Management and Policy
- Tree-ring climate responses
- Marine and coastal plant biology
- Greenhouse Technology and Climate Control
- Soil Carbon and Nitrogen Dynamics
- Plant Pathogens and Fungal Diseases
- Horticultural and Viticultural Research
- Bryophyte Studies and Records
- Photosynthetic Processes and Mechanisms
- Allergic Rhinitis and Sensitization
Norwegian University of Life Sciences
2016-2025
University of Eastern Finland
2010-2018
Finland University
2010-2013
Norwegian University of Science and Technology
2007
Umeå University
2007
• Induction of the pigments parietin and melanin by specific wavelength ranges solar radiation was studied in two widespread foliose lichens: ubiquitous sun-tolerant Xanthoria parietina, from which orange can be extracted living thalli acetone, naturally melanin-free shade-adapted specimens old forest species Lobaria pulmonaria. Parietin-free X. parietina L. pulmonaria were exposed to field under filter foils transmitting or absorbing natural UV-radiation (< 400 nm). Synthesis both depended...
Boreal forests are important carbon sinks and host a diverse array of species that provide ecosystem functions. have long history intensive forestry, in which even-aged management with clear-cutting has been the dominant harvesting practice for past 50-80 years. As second cycle is emerging, there an urgent need to examine effects repeated events on biodiversity. Clear-cutting led reduced numbers old large trees, decreased volumes dead wood varied decay stages diameters, altered physical...
This paper aims to assess the influence of canopy cover on lichen growth in boreal forests along a regional forest gradient. Biomass and area gain, some acclimation traits, were assessed old-forest lichens Lobaria pulmonaria (L.) Hoffm., Pseudocyphellaria crocata Vain., Usnea longissima Ach. transplanted 110 days three successional Norway spruce ( Picea abies Karst.) stands (clearcut, young, old forest) repeated rainfall gradient (continental, suboceanic, Atlantic zones) Scandinavia. Lichen...
Although several climatic factors are expected to change simultaneously in the future, effect of such combined changes on plants have seldom been tested under field conditions. We report a experiment with dark-leaved willow, Salix myrsinifolia, subjected enhancements ultraviolet-A (UVA), UVB radiation and temperature, setup Joensuu, Eastern Finland. S. myrsinifolia is dioecious species, known as an important food plant for many herbivores. Cuttings eight clones, four each sex, willow were...
Plant defence theories have recently evolved in such a way that not only the quantity but also quality of mineral nutrients is expected to influence plant constitutive defence. Recently, an extended prediction derived from protein competition model (PCM) suggested nitrogen (N) limitation more important for production phenolic compounds than phosphorus (P). We aimed at studying sexual differences patterns carbon allocation growth and relation N P availability Populus tremula L. seedlings....
Elevations of carbon dioxide, temperature and ultraviolet-B (UBV) radiation in the growth environment may have a high impact on accumulation plants, different factors work opposite directions or induce additive effects. To detect changes phytochemistry silver birch (Betula pendula) seedlings, six genotypes were exposed to combinations ambient elevated levels CO2 , UVB top-closed chambers for 7 weeks. The relatively similar their responses, no significant interactive effects three-level...
Climate change is causing upward shift of forest lines worldwide, with consequences for soil biota and carbon (C) sequestration. We here analyse compositional changes in the across line ecotone, an important transition zone between different ecosystems. collected samples along transects stretching from subalpine mountain birch forests to alpine heath. Soil fungi micro-eukaryotes were surveyed using DNA metabarcoding ITS2 18S markers, while ergosterol was used quantify fungal biomass....
Induction of secondary compounds in three reindeer lichens ( Cladonia arbuscula, C. rangiferina and stellaris ) was studied under controlled conditions a growth chamber. Acetone rinsed (secondary removed) lichen mats were subjected to light regimes (PAR, PAR+UV-A PAR+UV-A+UV-B), each combined with simulated herbivory (clipping). After 4 weeks, extracts analyzed by HPLC for any synthesized compounds. UV-B induced the synthesis usnic acid arbuscula melanic pigments . Atranorin,...
Beech forests reaches its native distribution limit in SE Norway, but is expected to expand substantially northwards due climate warming. This may potentially result a fundamental transformation of contemporary Northern European forests, with tentative effects on the associated belowground fungi. Fungal communities mediate vital ecosystem processes such as productivity and carbon sequestration boreal forests. To investigate how soil fungi affected by vegetation transition from spruce beech...
Nitrogen availability limits growth in most boreal forests. However, parts of the zone receive significant levels nitrogen deposition. At same time, forests are fertilized to increase volume and carbon sequestration. No matter source, increasing forest ecosystem will influence resource situation for its primary producers, with possible implications their defensive chemistry. In general, fertilization reduces phenolic compound concentrations trees, but existing evidence mainly comes from...