Results 31 to 40 of about 92,573 (158)

Acidic Deposition and Climate Warming as Drivers of Tree Growth in High-Elevation Spruce-Fir Forests of the Northeastern US

Frontiers in Forests and Global Change, 2019
Acid rain in eastern North America contributed to the widespread decline of red spruce in high-elevation spruce-fir forests. With recent reductions in acid deposition and a warming climate, resurgence of red spruce growth has been reported in some ...
Jay W. Wason, Jay W. Wason, Colin M. Beier, John J. Battles, Martin Dovciak   +4 more
doaj   +1 more source

Potential Species Distribution of Balsam Fir Based on the Integration of Biophysical Variables Derived with Remote Sensing and Process-Based Methods

Remote Sensing, 2009
In this paper we present a framework for modelling potential species distribution (PSD) of balsam fir [bF; Abies balsamea (L.) Mill.] as a function of landscape-level descriptions of: (i) growing degree days (GDD: a temperature related index), (ii) land ...
Charles P.-A. Bourque, Quazi K. Hassan
doaj   +1 more source

Phenotypic, ITS phylogenetic and pathogenic analyses of Pyllosticta Multicorniculata associated with needle blight symptoms of balsam fir in Canada [PDF]

Glasnik Šumarskog Fakulteta: Univerzitet u Beogradu, 2006
Phyllosticta multicorniculata Bissett & Palm causes needle blight on Abies balsamea (L) Mill. in eastern Canada. The disease symptoms are similar to those provoked by Phyllosticta abietis Bissett & Palm on Abies grandis Lindl.
Vujanović Vladimir
doaj   +1 more source

Relative contributions of site conditions and interspecific competition to post-harvest regeneration in boreal mixedwoods

The Forestry Chronicle
In Canadian boreal forests, clearcutting has traditionally been the main harvest treatment, resulting in relatively uniform, even-aged stand structures.
Léa Darquié, Maciré Fofana, Alain Leduc, Nicole J. Fenton, Nelson Thiffault   +4 more
doaj   +1 more source

Spatially explicit climate change projections for the recovery planning of threatened species: The Bicknell's Thrush (Catharus Bicknelli) as a case study

Global Ecology and Conservation, 2019
With climate change, natural resource managers are faced with the challenging task of planning the conservation of habitat for threatened species. Classified as ''threatened'' under the Species at Risk Act in Canada, the Bicknell's Thrush (Catharus ...
Philippe Cadieux, Yan Boulanger, Dominic Cyr, Anthony R. Taylor, David T. Price, Junior A. Tremblay   +5 more
doaj   +1 more source

Behavioral response of moose Alces alces to summer heat stress

Wildlife Biology, EarlyView.
Minnesota moose are heat‐stressed during summers, which is adversely impacting their survival. We used both movement and activity data to explore the behavioral responses of Minnesota moose experiencing heat stress, termed ‘hot moose events' or HMEs, to understand how both ambient temperature and available habitat contribute to the ability of these ...
Michelle Carstensen, Amanda M. McGraw, Andrew N. Tri, Deahn M. Donner   +3 more
wiley   +1 more source

Contribution of topographic features and categorization uncertainty for a tree species classification in the boreal biome of Northern Ontario

GIScience & Remote Sensing, 2023
Variations within local topography can effectively impact the location of tree species within naturally forested areas. Furthermore, the uncertainty of prediction for classification can vastly differ amongst topography and the overlying tree species ...
Rory Clifford Pittman, Baoxin Hu
doaj   +1 more source

Soil and microbial responses to wild ungulate trampling depend more on ecosystem type than trampling severity

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Physical trampling is a ubiquitous activity of walking vertebrates, but is poorly understood as a mechanism impacting biogeochemical cycling in soil. Lack of detailed knowledge of soil abiotic–biotic interactions underlying trampling effects, and the primary sources of ...
G. Adam Meyer, Shawn J. Leroux, Kathryn E. Hargan, Niels van Miltenburg   +3 more
wiley   +1 more source

Balsam Fir and American Beech Influence Soil Respiration Rates in Opposite Directions in a Sugar Maple Forest Near Its Northern Range Limit

Frontiers in Forests and Global Change, 2021
Conifers and deciduous trees greatly differ in regard to their phylogenetics and physiology as well as their influence on soil microclimate and chemical properties.
Nicolas Bélanger, Nicolas Bélanger, Alexandre Collin, Alexandre Collin, Rim Khlifa, Rim Khlifa, Simon Lebel-Desrosiers, Simon Lebel-Desrosiers   +7 more
doaj   +1 more source

The Importance of the Larval Parasitoid Actia interrupta (Diptera: Tachinidae) in Low Density Eastern Spruce Budworm Populations

Entomologia Experimentalis et Applicata, EarlyView.
Actia interrupta is an important larval tachinid parasitoid during low‐density populations of the eastern spruce budworm. In the late 1980s during the outbreak collapse, Meteorus trachynotus was initially the most important species, but was replaced by A. interrupta. Host patch size and density had no impact on the parasitism rates by A.
Véronique Martel, Jacques Régnière, Jean‐Claude Thireau   +2 more
wiley   +1 more source