Results 31 to 40 of about 4,206 (183)

Au long de la taïga et de la toundra : incursion nordique en Laponie

Revue Forestière Française, 2022
Comprendre aussi bien l’évolution des paysages sous forçage climatique en voie d’atténuation que l’adaptation subséquente des systèmes sylvatiques et asylvatiques nordiques, conduit l’auteur à un long cheminement à travers la forêt boréale jusqu’à la ...
Renaud Cantegrel
doaj   +1 more source

Silviculture of birch (Betula pendula Roth and Betula pubescens Ehrh.) in northern Europe [PDF]

Forestry, 2009
Summary In Europe, two commercially important treelike birch species occur naturally: silver birch ( Betula pendula Roth) and downy birch ( Betula pubescens Ehrh.). Both species have a wide natural distribution area on the Eurasian continent, ranging from the Atlantic to eastern Siberia. Although birches occur throughout almost the whole of Europe, the
Hynynen, J., Niemistö, P., Viherä-Aarnio, A., Brunner, A., Hein, S., Velling, P.   +5 more
openaire   +2 more sources

The missing woodland story: Implications of 1700 years of stand‐scale change on ‘naturalness’ and managing remnant broadleaved woodlands

People and Nature, EarlyView.
Abstract Longer‐term perspectives—equivalent to the lifespans of long‐lived trees—are required to fully inform perceptions of ‘naturalness’ used in woodland conservation and management. Stand‐scale dynamics of an old growth temperate woodland are reconstructed using palaeoecological data.
Annabel Everard, J. Edward Schofield, Tim Mighall, Scott Timpany, Gill Plunkett   +4 more
wiley   +1 more source

Cherry leaf roll virus – an emerging virus in Finland?

Silva Fennica, 2009
Cherry leaf roll virus, CLRV, is a plant pathogen that infects a variety of deciduous trees and shrubs in temperate regions. Little is known about its occurrence at high latitudes and especially in Finnish birch species. Still, symptoms that seemed to
Bargen, Susanne, Grubits, Elise, Jalkanen, Risto, Büttner, Carmen   +3 more
doaj   +1 more source

Conservation status of species used in the UK herbal medicine industry

PLANTS, PEOPLE, PLANET, EarlyView.
Given the ongoing biodiversity crisis, sustainable use and management of medicinal plants is critical. We assessed the conservation status, threats and conservation actions of 298 species sold by UK suppliers to medical herbalists. We found that most species used are unevaluated, representing a gap in conservation knowledge, and of those with ...
Isabella Flowers, Jon C. Lovett, Christopher Hassall   +2 more
wiley   +1 more source

Simulation model for natural regeneration of Pinus sylvestris, Picea abies, Betula pendula and Betula pubescens.

Silva Fennica, 1987
In the model the regeneration process is derived into three subprocesses: birth, growth and mortality of seedlings. The main emphasis is on the birth process where the following phases are simulated: seed crop, quality of seeds, maturity of seeds ...
Pukkala, Timo
doaj   +1 more source

Understory functional groups and fire history but not experimental warming drive tree seedling performance in unmanaged boreal forests

Frontiers in Forests and Global Change, 2023
IntroductionSurvival and growth of tree seedlings are key processes of regeneration in forest ecosystems. However, little is known about how climate warming modulates seedling performance either directly or in interaction with understory vegetation and ...
Maria-Theresa Jessen, Maria-Theresa Jessen, Maria-Theresa Jessen, Eveline J. Krab, Eveline J. Krab, Signe Lett, Signe Lett, Marie-Charlotte Nilsson, Laurenz Teuber, David A. Wardle, Ellen Dorrepaal   +10 more
doaj   +1 more source

Effects of Pyrolysis Control Parameters on the Structural Properties of Biomass‐Derived Activated Carbon Materials and Their Energy Applications

The Chemical Record, EarlyView.
Tubular pyrolysis synthesis is a widespread method to produce activated carbons (ACs). This review focuses on the different controlling parameters of the tubular pyrolysis synthesis method and their influence on the performance of synthesized ACs, thereby considering both experimental aspects and the use of plant‐based biomasses (PBBs) as feedstock ...
Meenal Gupta, Maria F. Gaele, Pasquale Gargiulo, Yogesh Kumar, Valeria Califano, Aniello Costantini, Tonia M. Di Palma   +6 more
wiley   +1 more source

Distinguishing between Betula pendula Roth. and Betula pubescens Ehrh. on the basis of wood anatomy.

Silva Fennica, 1980
It was concluded on the basis of the anatomical investigations of four mature trees that Roth can be distinguished from Ehrh. using the number of bars per scalariform perforation plate as an identification factor.
Bhat, K., Kärkkäinen, Matti
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