Browsing Luonnontieteiden, metsätieteiden ja tekniikan tiedekunta by Author "Mehtätalo, Lauri"
Now showing items 1-9 of 9
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A Seven-Year Study of Phenolic Concentrations of the Dioecious Salix myrsinifolia
Nissinen, Katri; Virjamo, Virpi; Mehtätalo, Lauri; Lavola, Anu; Valtonen, Anu; Nybakken, Line; Julkunen-Tiitto, Riitta (Springer Nature, 2018)In boreal woody plants, concentrations of defensive phenolic compounds are expected to be at a high level during the juvenile phase and decrease in maturity, although there is variation between plant species. Females of ...Tieteelliset aikakauslehtiartikkelit
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Affect Recognition in Code Review: An In-situ Biometric Study of Reviewer's Affect
Vrzakova, Hana; Begel, Andrew; Mehtätalo, Lauri; Bednarik, Roman (Elsevier BV, 2020)Code review in software development is an important practice that increases team productivity and improves product quality. Code review is also an example of remote, computer-mediated asynchronous communication prone to ...Tieteelliset aikakauslehtiartikkelit
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Determining maximum entropy in 3D remote sensing height distributions and using it to improve aboveground biomass modelling via stratification
Adnan, Syed; Maltamo, Matti; Mehtätalo, Lauri; Ammaturo, Rhei N.L; Packalen, Petteri; Valbuena, Rubén (Elsevier BV, 2021)McArthur's foliage height diversity (FHD) has been the gold standard in the determination of structural complexity of forests characterized by LiDAR vertical height profiles. It is based on Shannon's entropy index, which ...Tieteelliset aikakauslehtiartikkelit
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Development of height growth and frost hardiness for one-year-old Norway spruce seedlings in greenhouse conditions in response to elevated temperature and atmospheric CO2 concentration
Levkoev, Eino; Mehtätalo, Lauri; Luostarinen, Katri; Pulkkinen, Pertti; Zhigunov, Anatoly; Peltola, Heli (Finnish Society of Forest Science, 2018)The mean temperature during the potential growing season (April–September) may increase by 1 °C by 2030, and by 4 °C, or even more, by 2100, accompanied by an increase in atmospheric CO2 concentrations of 536–807 ppm, ...Tieteelliset aikakauslehtiartikkelit
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Estimating forest stand density and structure using Bayesian individual tree detection, stochastic geometry, and distribution matching
Kansanen, Kasper; Vauhkonen, Jari; Lähivaara, Timo; Seppänen, Aku; Maltamo, Matti; Mehtätalo, Lauri (Elsevier BV, 2019)Errors in individual tree detection and delineation affect diameter distribution predictions based on crown attributes extracted from the detected trees. We develop a methodology for circumventing these problems. The method ...Tieteelliset aikakauslehtiartikkelit
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Field calibration of merchantable and sawlog volumes in forest inventories based on airborne laser scanning
Karjalainen, Tomi; Mehtätalo, Lauri; Packalen, Petteri; Gobakken, Terje; Næsset, Erik; Maltamo, Matti (Canadian Science Publishing, 2020)In many countries, airborne laser scanning (ALS) inventories are implemented to produce predictions for stand-level forest attributes. Nevertheless, mature stands are usually field-visited prior to clear-cutting, so some ...Tieteelliset aikakauslehtiartikkelit
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Forest inventories for small areas using drone imagery without in-situ field measurements
Kotivuori, Eetu; Kukkonen, Mikko; Mehtätalo, Lauri; Maltamo, Matti; Korhonen, Lauri; Packalen, Petteri (Elsevier BV, 2020)Drone applications are becoming increasingly common in the arena of forest management and forest inventories. In particular, the use of photogrammetrically derived drone-based image point clouds (DIPC) in individual tree ...Tieteelliset aikakauslehtiartikkelit
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Genetic modification of the flavonoid pathway alters growth and reveals flexible responses to enhanced UVB - Role of foliar condensed tannins
Thitz, Paula; Hagerman, Ann E; Randriamanana, Tendry R; Virjamo, Virpi; Kosonen, Minna; Lännenpää, Mika; Nyman, Tommi; Mehtätalo, Lauri; Kontunen-Soppela, Sari; Julkunen-Tiitto, Riitta (Wiley, 2021)Accumulation of certain phenolics is a well‐known response of plants to enhanced UVB radiation (280–315 nm), but few experiments have compared the relative importance of different phenolic groups for UVB resilience. To ...Tieteelliset aikakauslehtiartikkelit
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Resolution dependence in an area-based approach to forest inventory with airborne laser scanning
Packalen, Petteri; Strunk, Jacob; Packalen, Tuula; Maltamo, Matti; Mehtätalo, Lauri (Elsevier BV, 2019)In an Area Based Approach (ABA) to forest inventories using Airborne Laser Scanning (ALS) data, the sample plot size may vary or the cell size may differ from the plot size. Although this resolution mismatch may cause bias ...Tieteelliset aikakauslehtiartikkelit