Results 11 to 20 of about 1,660,917 (306)

Discrete port-controlled Hamiltonian dynamics and average passivation [PDF]

open access: yes, 2019
The paper discusses the modeling and control of port-controlled Hamiltonian dynamics in a pure discrete-time domain. The main result stands in a novel differential-difference representation of discrete port-controlled Hamiltonian systems using the ...
Mattioni M.   +3 more
core   +1 more source

Potential relationships of selected abiotic variables, chemical elements and stand characteristics with soil organic carbon in spruce and beech stands

open access: yesiForest - Biogeosciences and Forestry, 2021
Increasing attention is given to carbon sequestration in forest soil with regard to climate change and the mitigation of its impacts; therefore, it is very important to know which parameters and variables could influence carbon sequestration and throw ...
Horváth M   +4 more
doaj   +1 more source

Stand Biomass Dynamics of Pine Plantations and Natural Forests on Dry Steppe in Kazakhstan [PDF]

open access: yes, 1995
Biomass dynamics were studied in isolated relict stands of scots pine (Pinus sylvestris) on the dry steppe of Kazakhstan (53-54N) where potential evaporation is 500-600 mm yr-1 and the rainfall is 250-260 mm yr-1.
Usol'tsev, Vladimir A.   +1 more
core   +2 more sources

Structure of old Pinus sylvestris dominated forest stands along a geographic and human impact gradient in mid-boreal Fennoscandia

open access: yesSilva Fennica, 2005
Stand structural characteristics were examined in old Pinus sylvestris dominated sites in three regions along a broad geographic and human impact gradient in mid-boreal Fennoscandia.
Lilja, Saara, Kuuluvainen, Timo
doaj   +1 more source

An allometry-based approach for understanding forest structure, predicting tree-size distribution and assessing the degree of disturbance [PDF]

open access: yes, 2012
Tree-size distribution is one of the most investigated subjects in plant population biology. The forestry literature reports that tree-size distribution trajectories vary across different stands and/or species, while the metabolic scaling theory suggests
Anfodillo, Tommaso   +5 more
core   +2 more sources

Distribution, productivity and natural regeneration of black alder (Alnus glutinosa (L.) Gaertn.) in Ukrainian Polissya

open access: yesFolia Oecologica, 2022
The aim of the study was to assess the current state and productivity of black alder (Alnus glutinosa (L.) Gaertn.) stands and determine the optimal conditions for the emergence and further growth of its natural regeneration in Ukrainian Polissya.
Lukyanets Volodymyr   +7 more
doaj   +1 more source

Influence of umbrella pine (Pinus pinea L.) stand type and tree characteristics on cone production [PDF]

open access: yes, 2016
Most umbrella pine (Pinus pinea L.) stands are managed as agroforestry systems, whose main production is fruit, due to the edible and highly nutritious kernels, and are frequently associated to natural or seeded pastures and grazing.
Afonso, Anabela   +3 more
core   +1 more source

Analysis of the Pinus sylvestris L. plus tree gene pool in Karelia using microsatellite loci

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2018
In this work, based on the results of the microsatellite loci (PtTX2123, PtTX2146, Spac11.8) tests, we provided a comparative evaluation of the genetic structures and levels of genetic diversity of the following populations: two plus stands from Velikaya
Aleksey Ilinov, Boris Raevsky
doaj   +1 more source

Features of natural renewal in pine-linden and larch-linden forest stands in Moscow

open access: yesRUDN Journal of Agronomy and Animal Industries, 2023
Problems of natural renewal of tree species (pine-linden and larch-linden stands) were studied in the territory of Forest experimental station, Moscow Timiryazev Agricultural Academy.
Aleksandr V. Lebedev   +6 more
doaj   +1 more source

Local-scale patterns of genetic variability, outcrossing, and spatial structure in natural stands of Arabidopsis thaliana [PDF]

open access: yes, 2015
As Arabidopsis thaliana is increasingly employed in evolutionary and ecological studies, it is essential to understand patterns of natural genetic variation and the forces that shape them.
Bomblies, Kirsten   +7 more
core   +1 more source

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