Results 71 to 80 of about 44,949 (260)

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

Assessment of the degree of air pollution by fluctuating asymmetry of leaves of various tree species

RUDN Journal of Ecology and Life Safety, 2022
Fluctuating asymmetry of the hanging birch ( Betula pendula Roth), black poplar ( Populus nigra L . ), common ash ( Fraxinus excelsior L . ), common maple ( Acer platanoides L .
Bibigul E. Gubasheva, Guldana Z. Idrissova, Artur N. Tumenov, Ruslan R. Miftakhov   +3 more
doaj   +1 more source

Monitoring GPS‐collared moose by ground versus drone approaches: efficiency and disturbance effects

Wildlife Biology, EarlyView.
Efficient wildlife management requires precise monitoring methods, for example to estimate population density, reproductive success, and survival. Here, we compared the efficiency of drone (equipped with a RGB camera) and ground approaches to detect and observe GPS‐collared female moose Alces alces and their calves. We also quantified how drone (n = 42)
Martin Mayer, Erlend Furuhovde, Kristoffer Nordli, Giorgia Myriam Ausilio, Petter Wabakken, Ane Eriksen, Alina L. Evans, Karen Marie Mathisen, Barbara Zimmermann   +8 more
wiley   +1 more source

Secondary forest succession in Silver birch (Betula pendula Roth) and Scots pine (Pinus sylvestris L.) southern limits in Europe, in a site of Natura 2000 network – an ecogeographical approach

Forest Systems, 2020
Aim of the study: To investigate the secondary forest succession in the study area and the pathways of its spread and the existing environmental, autecological factors and possible inter-specific competition relationships.
Nikolaos Georgios Oikonomakis, Petros Ganatsas   +1 more
doaj   +1 more source

Curly Birch Society

Silva Fennica, 1978
Curly birch, a curly grained variety of birch ( Sok.), has fetched a higher price than any other Finnish tree species on account of its rarity and decorativeness. Curly graininess has been found in Finland in addition to silver birch, also in and Betula
Huuri, Olavi
doaj   +1 more source

First data about fungal diversity of the “Trekhizbenskyi Step” division of the Luhansk Nature Reserve [PDF]

, 2013
One hundred and fifty fungal species were revealed by us in the “Trekhizbenskyi Step” division of the Luhansk Nature Reserve. Of them, 52 species are those belonging to Ascomycota and 98 to Basidiomycota.
Akulov, O., Helleman, Stip, Ordynets, O.
core   +1 more source

Leaf traits and photosynthetic responses of Betula pendula saplings to a range of ground-level ozone concentrations at a range of nitrogen loads.

Journal of plant physiology, 2017
Ground-level ozone (O3) concentrations and atmospheric nitrogen (N) deposition rates have increased strongly since the 1950s. Rising ground-level O3 concentrations and atmospheric N deposition both affect plant physiology and growth, however, impacts ...
H. Harmens, F. Hayes, Katrina Sharps, G. Mills, V. Calatayud   +4 more
semanticscholar   +1 more source

Conservation implications of shifting habitat use in migrating insects: Selection patterns in a threatened damselfly show that season‐specific actions are needed

Insect Conservation and Diversity, EarlyView.
Well‐preserved heathlands of NW Italy are the main overwintering habitat of Sympecma paedisca, while grassy margins in farmland are used only in summer and are avoided from autumn onwards. Grassy margins in farmland act as corridors during the species' migrations between its breeding (ricefields) and overwintering (lowland heathlands) grounds ...
Leonardo Siddi, Martina Cadin, Mattia Brambilla, Giacomo Assandri   +3 more
wiley   +1 more source

Flowering phenology of selected wind pollinated allergenic deciduous tree species

Acta Agrobotanica, 2012
Systematic phenological observations have been carried out in the Dendrological Garden of August Cieszkowski Agricultural University, Park Sołacki, Lasek Golęciński, Przybyszewskiego Street, for two years (2003, 2004).
Magdalena Kluza-Wieloch, Joanna Szewczak
doaj   +1 more source

Emissions of biogenic volatile organic compounds and subsequent photochemical production of secondary organic aerosol in mesocosm studies of temperate and tropical plant species [PDF]

, 2014
Silver birch (Betula pendula) and three Southeast Asian tropical plant species (Ficus cyathistipula, Ficus benjamina and Caryota millis) from the pantropical fig and palm genera were grown in a purpose-built and environment-controlled whole-tree chamber.
Alfarra, M. R., Capes, G., Carr, T., Hamilton, J. F., Hewitt, C. N., Mackenzie, A. Robert, McFiggans, Gordon, Monks, P. S., Pugh, T. A. M., Ryan, Annette, Smallbone, K. L., Wyche, K. P.   +11 more
core   +5 more sources