Results 51 to 60 of about 382,176 (172)

Natural root grafting in Picea mariana to cope with spruce budworm outbreaks [PDF]

Canadian Journal of Forest Research, 2016
Spruce budworm (Choristoneura fumiferana Clem.) outbreaks cause extensive mortality and growth reductions throughout boreal forests in eastern North America. As tree vulnerability to defoliation remains partially unexplained by tree and stand attributes, we hypothesized that root grafting might attenuate the negative impact of severe defoliation in ...
Salomón Moreno, Roberto Luis, Tarroux, Emilie, Desrochers, Annie   +2 more
openaire   +2 more sources

Combining paleoecology and modeling to explore cascading disturbances in forest ecosystems

Ecography, Volume 2026, Issue 10, October 2026.
Climate‐induced cascading disturbance interactions pose a major challenge to the sustainable provision of forest ecosystem services to society. Developing a deeper understanding and enhanced capacity to simulate these interactions is essential for identifying disturbance‐induced tipping points in forest ecosystems, and for improving management in ...
Cécile C. Remy, Matthew D. Hurteau, Sarah Le Berre, Dominik Thom, Rupert Seidl, Laurent Millet, Damien Rius   +6 more
wiley   +1 more source

Spatial Variations in Seed Germination Traits of White Spruce (Picea glauca) and Black Spruce (P. mariana) Across the Canadian Boreal Forest

Plants
This study focuses on the spatial variation in seed germination characteristics of Picea glauca and P. mariana, prominent and widespread species within the Canadian boreal forest.
Elaine Qualtiere, Yongsheng Wei, Dustin Snider, Yuguang Bai, Mark Johnston, Daniel W. McKenney, Pia Papadopol, Dale Simpson   +7 more
doaj   +1 more source

Estimation of Error Margin in the Quantification of Large Wood Volumes in River From In Situ and UAV Measurements

Earth Surface Processes and Landforms, Volume 51, Issue 10, October 2026.
Large wood (LW) plays a key role in river dynamics and biodiversity, but quantifying its volume and budget remains challenging. This study compared in situ and UAV‐based measurements of LW jams in two Gaspé Peninsula rivers (Québec, Canada), highlighting strong variability mainly due to operator bias. A new methodology reduced this variability, leading
Maxime Gillet, Maxime Boivin, Maxime Maltais, Félix Lachapelle, Thomas Buffin‐Bélanger   +4 more
wiley   +1 more source

Научный опыт по адаптации интродуцентов в зелёном поясе города Астаны

Еуразиялық агротехникалық журнал
Предпосылки и цель. Видовой состав древесных и кустарниковых пород, используемых в городском озеленении и зелёном поясе г. Астаны, отличается ограниченным ассортиментом. Поэтому для увеличения биоразнообразия необходимо привлечение инорайонных растений,
Кабанова С.А., Оспангалиев А.С., Кабанов А.Н.   +2 more
doaj   +1 more source

Impact of Spacings on Sapwood and Heartwood Thickness in Picea Mariana (Mill.) B.S.P. and Picea Glauca (Moench.) Voss [PDF]

, 2007
The impact of spacing on sapwood and heartwood thickness was studied in a 38-year-old plantation in northern Ontario. Ten trees each of Picea mariana (Mill.) B.S.P. and Picea glauca (Moench.) Voss grown at spacings 1.8 m x 1.8 m, 2.7 m x 2.7 m, and 3.6 m
Hazenberg, G., Yang, K. C.
core   +1 more source

Insect communities of late Pleistocene steppe–tundra and Holocene boreal forest ecosystems in central Yukon Territory, Canada

Journal of Quaternary Science, Volume 41, Issue 7, Page 1178-1199, October 2026.
ABSTRACT Subfossil insect communities from the Quartz Creek site provide a detailed record of both Late Pleistocene steppe–tundra and Holocene boreal forest ecosystems in central Yukon Territory, Canada. Fifteen Pleistocene assemblages (marine isotope stages [MIS] 4 to 2) are dominated by steppe–tundra and dry‐tundra taxa, particularly the weevils ...
Scott L. Cocker, Svetlana Kuzmina, Nick Schafstall, Michael A. Monzon, Duane G. Froese   +4 more
wiley   +1 more source

Variation in reproductive potential across a multi-species treeline

Arctic, Antarctic, and Alpine Research, 2018
Cone and seed production at the forest-tundra ecotone, or treeline, depend on species-specific tolerances to limiting abiotic and biotic factors. As range expansion via seed dispersal is needed to keep pace with climate change, reproductive limitations ...
Andrew J. Trant, Ryan G. Jameson, Luise Hermanutz   +2 more
doaj   +1 more source

Evaluating Testability of Permafrost Models Through Physical and Thermal Testing in Complex Mountain Terrain, Yukon, Canada

Permafrost and Periglacial Processes, Volume 37, Issue 4, Page 570-591, October/December 2026.
ABSTRACT Due to its subsurface nature, permafrost cannot be directly observed with the naked eye or optical remote sensing. Consequently, accurately describing its distribution and thermal state is challenging. This is especially true in vast, remote environments, where obtaining comprehensive field data is demanding or improbable.
Ria Nicholson, Philip P. Bonnaventure, Nick C. Noad, Madeleine C. Garibaldi, Rabecca Thiessen, Will Kochtitzky   +5 more
wiley   +1 more source

Dynamics at the treeline: differential responses of Picea mariana and Larix laricina to climate change in eastern subarctic Québec

Environmental Research Letters, 2012
Treelines are known to be temperature-sensitive ecotones, and therefore could rapidly expand their range limits in response to climate warming. Observations of lack of range expansion, however, indicate that ecological constraints partly control the ...
Geneviève Dufour-Tremblay, Esther Lévesque, Stéphane Boudreau   +2 more
doaj   +1 more source