Results 101 to 110 of about 136,112 (282)

Results for the energy of a finite one-dimensional ionic crystal

Results in Physics, 2017
We consider a one-dimensional ionic crystal consisting of an arbitrary number of alternating positive and negative ions. We calculate exactly the energy per ion and uncover some interesting patterns.
Orion Ciftja, Scott Rossel, Shawn Smith, Philip Thomas   +3 more
doaj   +1 more source

Fruit‐quality tradeoffs generate asymmetry in plant reliance on mutualistic frugivores

Oikos, EarlyView.
Seed dispersal is a fundamental ecological process influencing the evolution of plant life‐history strategies. In fleshy‐fruited plants dispersed by mutualistic frugivores, variation in fruit traits among closely related species may shape the temporal and spatial dynamics of dispersal events critical to population success.
João Vitor S. Messeder, Tomás A. Carlo
wiley   +1 more source

Evaluating Cosmic Ray Neutron Sensor Estimates of Snow Water Equivalent in a Prairie Environment Using UAV Lidar

Water Resources Research
Monitoring snow cover in prairie environments is important for understanding water and energy fluxes, agricultural production, and flooding, but difficult due to shallow snowpack and considerable snow heterogeneity.
M. Woodley, H. Kim, E. Sproles, J. Eberly, S. Tuttle   +4 more
doaj   +1 more source

Suppression of soil microbiota rather than neighbours facilitates absinthe Artemisia absinthium invasion in native grasslands

Oikos, EarlyView.
Many mechanisms can lead to successful plant invasion, but their importance is often context dependent. One such mechanism is allelopathy: chemical inhibition of neighbouring plants. The importance of allelopathy may be mediated by soil microbiota and environmental conditions, and depend upon the species or functional group affected.
John Paul Wasan, Jonathan A. Bennett
wiley   +1 more source

Multitrophic alpha and beta diversity of lake plankton across Canada

Oikos, EarlyView.
Anthropogenic environmental changes impact freshwater biodiversity globally. While biodiversity assessments in freshwater environments have traditionally focused on individual groups of organisms or trophic levels, considering patterns of ‘multitrophic biodiversity' across the food web provides a more comprehensive view of anthropogenic impacts and ...
Vincent Fugère, Cindy Paquette, Gillian K. Martin, Rebecca E. Garner, Yannick Huot, David A. Walsh, Beatrix E. Beisner   +6 more
wiley   +1 more source

Nonstationarity in wildlife disease dynamics: insights from the prairie dog–plague system

Oikos, EarlyView.
Ecological relationships often vary in strength and direction across ecosystems, a pattern that has become increasingly evident as ecology expands to broader spatial and temporal scales. Although such nonstationarity – the changing effect of predictor variables across spatiotemporal contexts – is widely acknowledged in ecological research, it has ...
Gabriel M. Barrile, Joshua F. Layfield, David J. Augustine, Lauren M. Porensky, Courtney J. Duchardt, Imtiaz Rangwala, Ana D. Davidson   +6 more
wiley   +1 more source

When wolves aren't enough: revisiting trophic cascades in northern Wisconsin

Oikos, EarlyView.
Elimination of top predators has allowed large herbivores to flourish in many terrestrial ecosystems, transforming food webs and ecosystem functions. Restoration of large predator communities is hoped to reverse negative effects of this trophic downgrading, but evidence for such effects is elusive.
Elaine M. Brice, Donald M. Waller, Jennifer L. Price Tack, Daniel J. Storm, David A. Rogers, Sarah E. Johnson, Bernd Blossey   +6 more
wiley   +1 more source

The value of regeneration

People and Nature, EarlyView.
Abstract Millions of hectares of rangelands have been subject to degeneration through overgrazing, agricultural expansion, urbanisation and afforestation. Countering this, regeneration is a natural process whereby rangeland ecosystems revive themselves.
Ethan Gordon, Ada P. Smith, Jennifer Hodbod, Hannah Gosnell, Austin Himes, Matías Hargreaves‐Méndez   +5 more
wiley   +1 more source

Macro‐ and Micromechanical Deformations and Failure of Recycled PET/Flax Polyester Biocomposites

Polymer Composites, EarlyView.
Macro‐ and Micromechanical Deformations and Failure of Recycled PET/Flax Polyester Biocomposites. ABSTRACT Environmental sustainability has become a global priority aimed at reducing waste generation and dependence on fossil resources. This study reports on the development of sustainable biocomposites by combining flax woven fabrics (2, 4, and 6 plies)
Bianca Dal Pont, Laura Aliotta, Vito Gigante, Massimo Giffoni, Róbert Várdai, Béla Pukánszky, Andrea Lazzeri   +6 more
wiley   +1 more source

Acid Sulfite Pulping of Hemp: Effects of Processing Conditions on Lyocell Pulp Quality

Journal of Polymer Science, EarlyView.
Industrial hemp is emerging as a promising renewable source for next‐generation textile fibers. This study evaluates whether acid sulfite pulping can produce hemp‐based dissolving pulp suitable for lyocell manufacturing. While the process is historically linked to increased cellulose accessibility, it did not achieve the low lignin content and ...
Lelia Lawson, Bernardo A. Souto, Wade Chute, Patricia I. Dolez   +3 more
wiley   +1 more source