Results 41 to 50 of about 2,694,797 (236)

Effects of Thinning on Dynamics and Drought Resistance of Aspen-White Spruce Mixtures: Results From Two Study Sites in Saskatchewan

Frontiers in Forests and Global Change, 2021
Drought stress associated with warm temperatures is causing increased mortality and reduced growth of trees in drier portions of the boreal forests of western Canada with both warming and drought expected to increase over the coming decades.
Philip G. Comeau
doaj   +1 more source

White spruce limestone ecotypes

The Forestry Chronicle, 1974
White spruce provenances from soils with limestone parent material, and non-limestone parent material were planted on calcareous and non-calcareous soils. The limestone provenances grew the most on calcareous soils: the non-limestone provenances grew the most on non-calcareous soils. Limestone ecotypes have evolved by natural selection.
A. H. Teich, M. J. Holst
openaire   +1 more source

Within‐tree spatial heterogeneity of sap flow velocities and wood properties and its effect on the uncertainty of tree level sap flux estimates

PLANTS, PEOPLE, PLANET, EarlyView.
As forests are important for biodiversity and recreation and provide vital resources globally, it is essential that their health can be accurately monitored, for example, by using sap flow probes to measure tree water uptake. We investigated whether sap flow measurements might differ at various locations within the same tree due to variation in wood ...
Stefan Seeger, Markus Weiler, Martin Maier   +2 more
wiley   +1 more source

Mechanisms of resistance of white spruce to the spruce bud moth

The Forestry Chronicle, 1996
There is a genetic basis to resistance of open-grown white spruce trees to their primary pest, the spruce bud moth, Zeiraphera canadensis Mutt. & Free. Resistance is attributable to late budburst and unknown factors associated with higher predation and parasitism of eggs and mortality of old larvae.
openaire   +1 more source

Niche‐tracking as a collecting method: Habitat‐targeted search strategies for taxon‐focused botany

PLANTS, PEOPLE, PLANET, EarlyView.
Biodiversity science depends on more than collecting plants—it depends on how we search for them. Although GPS and digital maps have transformed fieldwork, they can also encourage repeated visits to the same easy‐to‐access sites, leaving other habitats and populations unknown to science.
Lucas C. Marinho, Isabela M. Waga, Domingos Cardoso   +2 more
wiley   +1 more source

Aboveground herbivory elevates belowground rhizosphere volatile organic compound concentrations in ambient and polluted air, independent of volatile sampling methodology

PLANTS, PEOPLE, PLANET, EarlyView.
The effect of air pollution on plants is still underexplored, especially belowground. We used a field facility that released diesel exhaust and ozone at concentrations equivalent to those near a busy road in Reading, UK, to measure belowground gas exchange of Scots pine together with feeding by large pine weevils, a major pest of conifers.
Tihomir Simin, Luke Bell, James M. W. Ryalls, Robbie D. Girling, Oliver E. I. Welling, Neil J. Mullinger, Muhammad Usman Rasheed, James D. Blande   +7 more
wiley   +1 more source

Flowering phenology of herbarium specimens reveals century‐scale shifts in allergenic pollen seasonality

PLANTS, PEOPLE, PLANET, EarlyView.
Pollen allergies are a primary cause of seasonal allergic rhinitis, which affects over 500 million people globally, damaging quality of life and incurring significant costs in medical treatment and reduced work productivity. Many countries monitor pollen to inform allergy sufferers about seasonal pollen levels.
David R. Williamson, Vibekke Vange, Tommy Prestø, Trond Einar Brobakk, Hallvard Ramfjord, Nestor González Roldán, James D. M. Speed   +6 more
wiley   +1 more source

Using Airborne Laser Scanning and Sentinel‐2 to Understand Subcanopy Light Regimes and Understory Diversity of Vascular Plants in Temperate Mountain Forests

Remote Sensing in Ecology and Conservation, EarlyView.
This study demonstrates that not just Airborne Laser Scanning, but also Sentinel‐2 can effectively estimate absolute canopy cover and canopy cover heterogeneity ‐ structural metrics that determine the subcanopy light regime, found to be linked to the vascular plant species richness in the understory of temperate mountain forests.
Felix Wieland‐Glasmann, Cornelius Senf, Kristin H. Braziunas, Rupert Seidl, Peter Annighöfer   +4 more
wiley   +1 more source

Parturition timing and the pre‐ and post‐partum behaviour of female moose assessed using animal‐borne video and movement‐based approaches

Wildlife Biology, EarlyView.
Limited information on moose calving behaviour, including parturition timing, cow‐calf interactions, and pre‐ and post‐partum movement patterns hinder our ability to define calving phenology and habitat use. GPS‐collars were deployed on 89 female moose over five years, including eight collars equipped with animal‐borne video and environmental data ...
Mikaela Borgeaud LeBlanc, Manuelle Landry‐Cuerrier, Vincent Brodeur, Murray M. Humphries   +3 more
wiley   +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