Results 51 to 60 of about 10,355 (252)

Within‐tree spatial heterogeneity of sap flow velocities and wood properties and its effect on the uncertainty of tree level sap flux estimates

PLANTS, PEOPLE, PLANET, EarlyView.
As forests are important for biodiversity and recreation and provide vital resources globally, it is essential that their health can be accurately monitored, for example, by using sap flow probes to measure tree water uptake. We investigated whether sap flow measurements might differ at various locations within the same tree due to variation in wood ...
Stefan Seeger, Markus Weiler, Martin Maier   +2 more
wiley   +1 more source

Experimental Analysis of Pretensioned CLT-Glulam T-Section Beams

Advances in Materials Science and Engineering, 2018
The bending behavior of T-section beams composed of a glulam web and an upper cross-laminated timber flange was studied. The influence of two fundamental factors on the bending strength and stiffness was considered: the wood species used for the webs and
J. Estévez-Cimadevila, F. Suárez-Riestra, D. Otero-Chans, E. Martín-Gutiérrez   +3 more
doaj   +1 more source

Preliminary results on allozyme diversity and differentiation of Norway spruce (Picea abies (L.) Karst.) in Poland based on plus tree investigations

Acta Societatis Botanicorum Poloniae, 2014
Genetic diversity and genetic differentiation among Polish populations of Norway spruce (Picea abies (L.) Karst.) were studied analyzing allozyme variation at 24 loci.
Andrzej Lewandowski, Jarosław Burczyk, Władysław Chałupka   +2 more
doaj   +1 more source

Simultaneous Real-Time Measurement of Isoprene and 2-Methyl-3-Buten-2-ol Emissions From Trees Using SIFT-MS

Frontiers in Plant Science, 2020
The C5 hemiterpenes isoprene and 2-methyl-3-buten-2-ol (MBO) are important biogenic volatiles emitted from terrestrial vegetation. Isoprene is emitted from many plant groups, especially trees such as Populus, while emission of MBO is restricted to ...
Ann-Sophie Lehnert, Ann-Sophie Lehnert, Erica Perreca, Jonathan Gershenzon, Georg Pohnert, Susan E. Trumbore   +5 more
doaj   +1 more source

Needle in a haystack: Holocene history of European larch in Central Europe revisited

PLANTS, PEOPLE, PLANET, EarlyView.
Defining nativity of species is crucial for their management. However, this is a complex task, especially for species that have been used and spread by humans for a long time. We combined paleoecological records with extensive genetic data to investigate the Holocene history of European larch—a common and economically important tree species in Central ...
Martin Prach, Petr Pokorný, Kristýna Hošková, Daniel Vondrák, Pavel Bednář, Jindřich Prach, Jana Hanzal Šedivá, Hana Drahošová, Kateřina Podrábská, Přemysl Bobek, Jan Smyčka, Tomáš Fér   +11 more
wiley   +1 more source

Classification of tree species and standing dead trees in Boreal forests using UAV‐based RGB, multispectral, and LiDAR point clouds

Remote Sensing in Ecology and Conservation, EarlyView.
We evaluated single‐ and multi‐sensor UAV approaches for classifying tree species and standing dead trees in boreal forests, focusing on key biodiversity indicators such as European aspen. Using spectral and structural features extracted from RGB, multispectral (MSP), and LiDAR point clouds for 1,205 field‐measured trees, we compared classification ...
Anton Kuzmin, Lauri Korhonen, Topi Tanhuanpää, Mikko Kukkonen, Matti Maltamo, Timo Kumpula   +5 more
wiley   +1 more source

Modern Abies, Picea, and Tsuga pollen distribution along the elevation gradient in East Asia

Global Ecology and Conservation
Sub-alpine dark coniferous forests (SCFs) exhibit distinct latitudinal and longitudinal elevation distributions in East Asia. The SCF genera Abies, Picea, and Tsuga produce distinctive pollen and have specific elevation and climate requirements, allowing
Anning Cui, Baoshuo Fan, Deke Xu, Hao Li, Houyuan Lu   +4 more
doaj   +1 more source

Using Airborne Laser Scanning and Sentinel‐2 to Understand Subcanopy Light Regimes and Understory Diversity of Vascular Plants in Temperate Mountain Forests

Remote Sensing in Ecology and Conservation, EarlyView.
This study demonstrates that not just Airborne Laser Scanning, but also Sentinel‐2 can effectively estimate absolute canopy cover and canopy cover heterogeneity ‐ structural metrics that determine the subcanopy light regime, found to be linked to the vascular plant species richness in the understory of temperate mountain forests.
Felix Wieland‐Glasmann, Cornelius Senf, Kristin H. Braziunas, Rupert Seidl, Peter Annighöfer   +4 more
wiley   +1 more source

Comparative leaf anatomy of some species of Abies and Picea (Pinaceae)

Acta Botânica Brasílica, 2015
A number of conifer species are still lacking anatomical data, which is significant because morphological and anatomical data are essential for systematic study.
Balkrishna Ghimire, Chunghee Lee, Jongcheol Yang, Kweon Heo   +3 more
doaj   +1 more source

Why wolves walk – drivers of daily movement in a social large carnivore

Wildlife Biology, EarlyView.
Animal movement patterns are influenced by a range of extrinsic and intrinsic factors, including the distribution of resources, human disturbance, landscape connectivity, species interactions, and individual traits. We examined factors associated with daily movement distance (DMD) and linearity in 20 territorial Scandinavian wolves Canis lupus during ...
Julia Björk, Håkan Sand, Petter Wabakken, Barbara Zimmermann, Camilla Wikenros   +4 more
wiley   +1 more source