Results 71 to 80 of about 2,041,388 (260)

Warm Spring Weather Alters Calling Phenology of Four Sympatric Early‐Breeding Anurans

open access: yesIntegrative Zoology, EarlyView.
An unusually warm March in 2024 (“false spring”) followed by freezing temperatures allowed us to assess the impact of a weather event on an amphibian community. The calling activity of all four species was associated with increasing temperature, and the first date of calling was advanced by 11–18 days.
Jeffrey P. Ethier   +3 more
wiley   +1 more source

Seasonal Habitat Selection by a Threatened Ungulate in an Industrializing Boreal Landscape

open access: yesAnimal Conservation, EarlyView.
Understanding habitat selection by Threatened wood bison in landscapes characterized by anthropogenic disturbance is important for conservation planning. During summer and winter, bison selected for linear (e.g., roads, seismic lines, pipelines) and polygonal (e.g., well sites) disturbances, unless there were high densities of linear features.
Lisa J. Koetke   +4 more
wiley   +1 more source

Effect of tree-ring detrending method on apparent growth trends of black and white spruce in interior Alaska

open access: yesEnvironmental Research Letters, 2016
Boreal forests are critical sinks in the global carbon cycle. However, recent studies have revealed increasing frequency and extent of wildfires, decreasing landscape greenness, increasing tree mortality and declining growth of black and white spruce in ...
Patrick F Sullivan   +4 more
doaj   +1 more source

The dual crisis: Climate change simultaneously drives pollinator decline and pest outbreaks

open access: yesAgricultural and Forest Entomology, EarlyView.
Climate change acts as an asymmetric ecological filter, favouring r‐selected pest traits (rapid reproduction, generalism) while disadvantaging K‐selected pollinators. For every 1°C of warming, bee species richness declines ~25% since the 1990s, while pest‐induced crop losses increase by 10%–25%. A network‐centric approach integrating climate‐responsive
Diriba Fufa Serdo
wiley   +1 more source

Near-saturated and complete genetic linkage map of black spruce (Picea mariana)

open access: yesBMC Genomics, 2010
Background Genetic maps provide an important genomic resource for understanding genome organization and evolution, comparative genomics, mapping genes and quantitative trait loci, and associating genomic segments with phenotypic traits.
Mann Ishminder K   +3 more
doaj   +1 more source

Spruce Tree Campground entrance and sign

open access: yes, 1935
Caption: "Entrance and sign, Spruce Tree Campground Black Hills N.F.
Phillips, R. E.;
core  

Out in the cold? A review of Early Middle Palaeolithic settlements in northern Central Europe, age data and geological preconditions for site formation and preservation

open access: yesBoreas, EarlyView.
The characteristics of settlement of Neanderthals in northern Central Europe during the earlier phases of the Middle Palaeolithic (Marine Isotope Stage 8–6) have been a matter of debate for decades, specifically regarding the population dynamics at such latitudes during the coldest phases. In this paper, we review the known archaeological record of the
Gianpiero Di Maida   +5 more
wiley   +1 more source

Twenty-five years post-treatment conifer responses to silviculture on a Kalmia-dominated site in eastern Canada

open access: yesThe Forestry Chronicle, 2017
Research has demonstrated the potential of soil scarification, fertilization, and herbicide application to improve conifer seedling establishment and early growth. However, tree responses to and interactions among silvicultural treatments vary, making it
Nelson Thiffault   +2 more
doaj   +1 more source

black spruce

open access: yes, 1975
spruce nThe pinus nigra or black spruce, is also not a very large tree ... in this country ... It is used here for fences, posts, and other small work, as well as in ship building in parts not exposed. From its boughs or sprigs, essence of spruce, in

core  

Ecophysiological adaptations of black spruce (Picea mariana) and tamarack (Larix laricina) seedlings to flooding.

open access: yes, 2004
Black spruce and tamarack are the predominant tree species in boreal peatlands. The effects of flooding on morphological and physiological responses were investigated in greenhouse grown (18 months old) black spruce (Picea mariana) and tamarack (Larix ...
Macdonald, S. Ellen, Islam, M. Anisul
core   +1 more source

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