Results 11 to 20 of about 3,291,041 (253)

Devonian upper ocean redox trends across Laurussia: Testing potential influences of marine carbonate lithology on bulk rock I/Ca signals

open access: yesFrontiers in Marine Science, 2022
The Devonian is characterized by major changes in ocean-atmosphere O2 concentrations, colonialization of continents by plants and animals, and widespread marine anoxic events associated with rapid δ13C excursions and biotic crises. However, the long-term
Ruliang He   +5 more
doaj   +1 more source

The Effect of Seeding Treatments and Climate on Fire Regimes in Wyoming Sagebrush Steppe

open access: yesFire, 2021
Wildfire size and frequency have increased in the western United States since the 1950s, but it is unclear how seeding treatments have altered fire regimes in arid steppe systems.
Chris Bowman-Prideaux   +2 more
doaj   +1 more source

Understory Vegetation Change Following Woodland Reduction Varies by Plant Community Type and Seeding Status: A Region-Wide Assessment of Ecological Benefits and Risks

open access: yesPlants, 2020
Woodland encroachment is a global issue linked to diminished ecosystem services, prompting the need for restoration efforts. However, restoration outcomes can be highly variable, making it difficult to interpret the ecological benefits and risks ...
Thomas A. Monaco, Kevin L. Gunnell
doaj   +1 more source

Taxonomic Description of Stenodiplosis tectori n. sp. (Diptera: Cecidomyiidae), a Seed Parasite of Cheatgrass, Anisantha tectorum, Based on Morphological and Mitochondrial DNA Data

open access: yesInsects, 2021
Cheatgrass is an annual grass species from Eurasia that has become invasive in much of western North America. It has been implicated in recent increases in the frequency, size, and intensity of wildfires, contributing to severe economic, environmental ...
Brian G. Rector   +6 more
doaj   +1 more source

Spatiotemporal Assessment and Driving Factors of Ecosystem Health: A Case Study of Two Provinces in Southern China

open access: yesBiology
The concept of ecosystem health (EH), proposed in the 1980s [...]
Yujun Cai   +3 more
doaj   +1 more source

Diet overlap among non‐native trout species and native cutthroat Trout (Oncorhynchus clarkii) in two U.S. ecoregions

open access: yesEcology and Evolution, 2021
The invasion of freshwater ecosystems by non‐native species can constitute a significant threat to native species and ecosystem health. Non‐native trouts have long been stocked in areas where native trouts occur and have negatively impacted native trouts
Mario Minder   +4 more
doaj   +1 more source

Cave Millipedes of the United States. XVIII. A new species and new records from caves in White Pine County, Nevada (Chordeumatida, Conotylidae and Polydesmida, Macrosternodesmidae) [PDF]

open access: yesSubterranean Biology
We describe Bollmanella amorensis sp. nov. from Labor of Love Cave, White Pine County, Nevada, United States. From cave explorations in Great Basin National Park and Humboldt-Toiyabe National Forest in White Pine Co., Nevada, we provide new records of ...
William A. Shear   +4 more
doaj   +3 more sources

ZrCo3B2 and HfCo3B2 Electrodes Go on Stage for Oxygen Evolution Reaction

open access: yesAdvanced Science, EarlyView.
The intermetallic compounds ZrCo3B2 and HfCo3B2 with distinctive chemical bonding features are excellent OER precursors, restructuring into OER‐active electrocatalysts delivering significantly high OER activities compared to the elemental Co, which is obvious from their lower onset potentials and increased obtained current densities.
Fatma Aras   +4 more
wiley   +1 more source

Limited directional change in mountaintop plant communities over 19 years in western North America

open access: yesEcosphere
Plant communities on mountain summits are commonly long‐lived, cold‐adapted perennials with low dispersal ability. These characteristics in tandem with limited area to track suitable conditions make these mountain communities potentially highly ...
Kaleb A. Goff   +8 more
doaj   +1 more source

Home - About - Disclaimer - Privacy