Results 41 to 50 of about 2,041,388 (260)

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

Estimating Stand Age from Airborne Laser Scanning Data to Improve Models of Black Spruce Wood Density in the Boreal Forest of Ontario

Remote Sensing, 2019
Spatial models that provide estimates of wood quality enable value chain optimization approaches that consider the market potential of trees prior to harvest.
Rebecca R.M. Wylie, Murray E Woods, Jeffery P. Dech   +2 more
doaj   +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

Assessment of sanitary conditions in stands of Norway spruce (Picea abies Karst.) damaged by spruce bud scale (Physokermes piceae Schrnk.)

iForest - Biogeosciences and Forestry, 2013
Spruce bud scale (Physokermes piceae Schrnk.) affects tree growth directly and indirectly. Direct injury appears in the form of tissue damage, as insects suck sap from tree phloem.
Miezite O, Okmanis M, Indriksons A, Ruba J, Polmanis K, Freimane L   +5 more
doaj   +1 more source

The Genome and Population Structure of the Spruce Beetle, Dendroctonus rufipennis (Kirby, 1837), a Transcontinental Pest of North American Spruce. [PDF]

Mol Ecol Resour
ABSTRACT The spruce bark beetle Dendroctonus rufipennis (Family: Curculionidae; Subfamily Scolytinae) is a major forest insect pest throughout the transcontinental range of spruce species (Picea spp.) in North America. Here, we present an annotated, near chromosome‐level, genome assembly of 271 Mb, with 86% of the assembly contained in 16 ...
Campbell EO, Batista PD, Lévesque-Tremblay V, Béliveau C, Bernier K, Romanenko K, Strong WB, Bleiker KP, Huber DPW, Keeling CI.   +9 more
europepmc   +2 more sources

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

Spruce Tree Campground

, 1939
Caption: "Showing camping unit in use at Spruce Tree Campground. Black Hills Nat'l Forest.
Averill, C. C.;
core   +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

Bending, shear, and compressive properties of three- and five-layer cross-laminated timber fabricated with black spruce

Journal of Wood Science, 2020
Cross-laminated timber (CLT) is an innovative engineering wood product made by gluing layers of solid-sawn lumber at perpendicular angles. The commonly used wood species for CLT manufacturing include spruce-pine-fir (SPF), douglas fir-larch, and southern
Minjuan He, Xiaofeng Sun, Zheng Li, Wei Feng   +3 more
doaj   +1 more source

Why wolves walk – drivers of daily movement in a social large carnivore

Wildlife Biology, EarlyView.
Animal movement patterns are influenced by a range of extrinsic and intrinsic factors, including the distribution of resources, human disturbance, landscape connectivity, species interactions, and individual traits. We examined factors associated with daily movement distance (DMD) and linearity in 20 territorial Scandinavian wolves Canis lupus during ...
Julia Björk, Håkan Sand, Petter Wabakken, Barbara Zimmermann, Camilla Wikenros   +4 more
wiley   +1 more source