Zobrazeno 1 - 10
of 337
pro vyhledávání: '"MEHTÄTALO, LAURI"'
Autor:
Levkoev, Eino, Mehtätalo, Lauri, Luostarinen, Katri, Pulkkinen, Pertti, Zhigunov, Anatoly, Peltola, Heli
Publikováno v:
Silva Fennica, Vol 52, Iss 3 (2018)
The mean temperature during the potential growing season (AprilâSeptember) may increase by 1 °C by 2030, and by 4 °C, or even more, by 2100, accompanied by an increase in atmospheric CO concentrations of 536â807 ppm, compared to the current c
Externí odkaz:
https://doaj.org/article/d3a719b638c2466688e31bb4db263019
Autor:
Čugunovs, Mihails, Tuittila, Eeva-Stiina, Mehtätalo, Lauri, Pekkola, Laura, Sara-Aho, Ida, Kouki, Jari
Publikováno v:
Silva Fennica, Vol 51, Iss 1 (2017)
Forest ecological restoration by burning is widely applied to promote natural, early-successional sites and increase landscape biodiversity. Burning is also used as a forest management practice to facilitate forest regeneration after clearcutting. Be
Externí odkaz:
https://doaj.org/article/9996a988792f4b4699093ada7912ee9d
Publikováno v:
Silva Fennica, Vol 48, Iss 3 (2014)
Tree species identification using optical remote sensing is challenging. Modern digital photogrammetric cameras enable radiometrically quantitative remote sensing and the estimation of reflectance images, in which the observations depend largely on t
Externí odkaz:
https://doaj.org/article/c240515f38264487a67268751c9dbf94
Publikováno v:
Silva Fennica, Vol 46, Iss 1 (2012)
Airborne laser scanning based forest inventories have recently shown to produce accurate results. However, the accuracy varies according to the test area and used methodology and therefore, an unambiguous and practical quality assessment will be need
Externí odkaz:
https://doaj.org/article/8cb07684fc7a4bb5a70c15a6e027903e
Publikováno v:
Silva Fennica, Vol 45, Iss 4 (2011)
In forest planning, the decision maker chooses for each stand a treatment schedule for a predefined planning period. The choice is based either on optimization calculations or on silvicultural guidelines. Schedules for individual stands are obtained
Externí odkaz:
https://doaj.org/article/c88b62603db3427b9d5e76b926b72492
Joint species distribution models (JSDM) are among the most important statistical tools in community ecology. They are routinely used for inference and various prediction tasks, such as to build species distribution maps or biomass estimation over sp
Externí odkaz:
http://arxiv.org/abs/2111.02460
Publikováno v:
Silva Fennica, Vol 44, Iss 5 (2010)
In forest planning, forest inventory information is used for predicting future development of forests under different treatments. Model predictions always include some errors, which can lead to sub-optimal decisions and economic loss. The influence o
Externí odkaz:
https://doaj.org/article/b69a570333644abe94ffdcba187ab1f5
Publikováno v:
Silva Fennica, Vol 43, Iss 1 (2009)
Accurate inventory data are required for ensuring optimal net return on investment from the forest. Erroneous data can lead to the formulation of a non-optimal plan that can cause inoptimality losses. Little is known of the effect of using erroneous
Externí odkaz:
https://doaj.org/article/99161cdf22e648f3a6e7782b242caf0d
Publikováno v:
Silva Fennica, Vol 41, Iss 2 (2007)
We compared different statistical methods for fitting linear regression models to a longitudinal data of breast height diameter (dbh) distributions of Scots pine dominated stands on drained peatlands. The parameter prediction methods for two paramete
Externí odkaz:
https://doaj.org/article/b7bf2d61fee84ebe9de8b7d2c6a36bf9
Publikováno v:
Silva Fennica, Vol 41, Iss 3 (2007)
In percentile method, percentiles of the diameter distribution are predicted with a system of models. The continuous empirical diameter distribution function is then obtained by interpolating between the predicted values of percentiles. In Finland, t
Externí odkaz:
https://doaj.org/article/1bd12ac1c42148af8434acb0596e6618