Results 21 to 30 of about 13,891 (287)

The effects of fire on the thermal stability of permafrost in lowland and upland black spruce forests of interior Alaska in a changing climate

Environmental Research Letters, 2013
Fire is an important factor controlling the composition and thickness of the organic layer in the black spruce forest ecosystems of interior Alaska. Fire that burns the organic layer can trigger dramatic changes in the underlying permafrost, leading to ...
E E Jafarov, V E Romanovsky, H Genet, A D McGuire, S S Marchenko   +4 more
doaj   +1 more source

An indicator species highlights continuous deadwood supply is a key ecological attribute of boreal old‐growth forests

Ecosphere, 2021
Old‐growth forests are optimal habitats for many woodpeckers, which are often themselves excellent indicators of deadwood‐associated biodiversity. Old‐growth forests are, however, heterogeneous ecosystems in terms of structure, composition, and deadwood ...
Maxence Martin, Junior A. Tremblay, Jacques Ibarzabal, Hubert Morin   +3 more
doaj   +1 more source

Conifer Regeneration After Experimental Shelterwood and Seed-Tree Treatments in Boreal Forests: Finding Silvicultural Alternatives

Frontiers in Plant Science, 2018
Forest regeneration is a key element in achieving sustainable forest management. Partial harvest methods have been used extensively in temperate broadleaf and mixedwood ecosystems to promote regeneration on poorly stocked sites and to maintain forest ...
Miguel Montoro Girona, Miguel Montoro Girona, Jean-Martin Lussier, Hubert Morin, Nelson Thiffault   +4 more
doaj   +1 more source

Suboptimal host tree benefits the overwintering of a destructive forest insect pest

Basic and Applied Ecology, 2023
Winter represents a stressful period for many organisms, and terrestrial insects are particularly susceptible to adverse thermal conditions. However, exposure to thermal stress and its effects on insect survival and performance can be modulated by ...
Eric R.D. Moise, Joseph J. Bowden, Michael Stastny   +2 more
doaj   +1 more source

Climate effects on jack pine and black spruce productivity in natural origin mixed stands and site index conversion equations

Trees, Forests and People, 2021
Forest managers need site productivity estimates for currently grown tree species as well as those that might be considered for future management on a given site.
Mahadev Sharma
doaj   +1 more source

Responses of black spruce (Picea mariana) and tamarack (Larix laricina) to flooding and ethylene treatments.

, 2003
Black spruce (Picea mariana (Mill.) BSP) and tamarack (Larix laricina (Du Roi) K. Koch) are the predominant tree species in the boreal peatlands of Alberta, Canada, where low nutrient availability, low soil temperature and a high water table limit their ...
Macdonald, S. Ellen, Islam, M. Anisul, Zwiazek, J.J.   +2 more
core   +1 more source

Seven spruce species on a mountain site - performance, foliar nutrients, and forest floor properties in stands 20 years old

iForest - Biogeosciences and Forestry, 2019
Norway spruce is often considered to have a negative impact on a site, yet it is native to many mountain regions of Europe. The relative influence of Norway spruce on site properties has frequently been compared with that of both broadleaved and other ...
Špulák O, Kacálek D, Balcar V
doaj   +1 more source

Tree Seedlings Detection and Counting Using a Deep Learning Algorithm

Applied Sciences, 2023
Tree-counting methods based on computer vision technologies are low-cost and efficient in contrast to the traditional tree counting methods, which are time-consuming, laborious, and humanly infeasible.
Deema Moharram, Xuguang Yuan, Dan Li
doaj   +1 more source

Drought sensitivity of Norway spruce is higher than that of silver fir along an altitudinal gradient in southwestern Germany [PDF]

, 2013
For Central Europe, climate projections foresee an increase in temperature combined with decreasing summer precipitation, resulting in drier conditions during the growing season.
van der Maaten, Ernst, van der Maaten Theunissen, Marieke, Maaten-Theunissen, Marieke van der, Maaten, Ernst van der, Kahle, Hans-Peter   +4 more
core   +1 more source

Facilitation of Balsam Fir by Trembling Aspen in the Boreal Forest: Do Ectomycorrhizal Communities Matter?

Frontiers in Plant Science, 2019
Succession is generally well described above-ground in the boreal forest, and several studies have demonstrated the role of interspecific facilitation in tree species establishment.
Mélissande Nagati, Mélissande Nagati, Mélanie Roy, Annie Desrochers, Sophie Manzi, Yves Bergeron, Monique Gardes   +6 more
doaj   +1 more source