Results 61 to 70 of about 4,984 (229)

Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift [PDF]

open access: yes, 2014
The Patagonian steppe—a massive rain-shadow on the lee side of the southern Andes—is assumed to have evolved ~15–12 Myr as a consequence of the southern Andean uplift. However, fossil evidence supporting this assumption is limited. Here we quantitatively
Barreda, Viviana Dora   +5 more
core   +3 more sources

Tails of Biodiversity: Vertebrate Community Assessment in a Neotropical River Basin via eDNA Metabarcoding

open access: yesEnvironmental DNA, Volume 8, Issue 1, January–February 2026.
This study used environmental DNA (eDNA) metabarcoding to assess vertebrate biodiversity in headwater streams of the Rio Santo Antônio basin, southeastern Brazil, a tributary of the Rio Doce. A total of 119 vertebrate OTUs were identified, with oxidation–reduction potential emerging as the strongest environmental predictor of species richness.
Larissa Moreira‐Silva   +8 more
wiley   +1 more source

New species of osmundaceous fertile leaves from the upper Triassic of Argentina

open access: yesActa Palaeobotanica, 2018
A new species of Osmundopsis Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. Osmundopsis zunigai sp. nov.
ELIANA P. COTUREL   +5 more
doaj   +1 more source

pdFOAM: A PIC-DSMC code for near-earth plasma-body interactions [PDF]

open access: yes, 2017
Understanding the interaction of the near-Earth space environment with orbiting bodies is critical, both from a design and scientific perspective. In Low Earth Orbit (LEO), the interaction between the Ionosphere and orbiting objects is well studied from ...
Boyce, R.R.   +4 more
core   +2 more sources

Variations in Satellite Charge Drag Coefficient With Solar Cycle

open access: yesSpace Weather, Volume 24, Issue 1, January 2026.
Abstract Ionospheric plasma interaction with charged satellite surfaces can lead to a substantial increase in orbital drag. In this context, natural events related to solar activity can have a detrimental effect on a satellite's lifespan and introduce uncertainty in orbital trajectory predictions.
A. Fazel‐Najafabadi   +2 more
wiley   +1 more source

Grazing intensity drives plant diversity but does not affect forage production in a natural grassland dominated by the tussock-forming grass Andropogon lateralis Nees

open access: yesScientific Reports, 2021
Andropogon lateralis is a tall and highly plastic tussock-forming grass native from southern South America. It is a frequent component of Campos and Subtropical highland grasslands that often becomes dominant under lax grazing regimes.
Pablo Giliard Zanella   +8 more
doaj   +1 more source

Gold in Britain : past, present and future [PDF]

open access: yes, 2010
Britain is a country with modest gold deposits. At least six tonnes, possibly up to ten tonnes, of gold have been recovered from numerous localities in Britain.
Colman, Tim
core  

Organic farming enhances soil microbial abundance and activity - A meta-analysis and meta-regression [PDF]

open access: yes, 2017
Population growth and climate change challenge our food and farming systems and provide arguments for an increased intensification of agriculture. A promising option is eco functional intensification through organic farming, an approach based on using ...
de Deyn, Gerlinde   +4 more
core   +1 more source

Forage, carbon accumulation, and soil physical characteristics in a crop–livestock production system

open access: yesCrop, Forage &Turfgrass Management, Volume 11, Issue 2, December 2025.
Abstract Crop‐livestock systems may improve land use and food security; however, heavy grazing can impair the soil physical properties and reduce the forage accumulation of subsequent crops. The study was conducted to evaluate the impact of mechanically harvest or low‐intensity grazing on the physical properties of soil and the productivity of an ...
Mariana N. de Souza   +3 more
wiley   +1 more source

Complementary geophysical, geomorphometric and pedological approaches for characterizing shallow and deep subsurface materials in a colluvial‐alluvial plain in Atlantic rainforest

open access: yesEarth Surface Processes and Landforms, Volume 50, Issue 15, December 2025.
This study combines GPR, 2D ERT and UAV‐derived terrain models to characterize sediment variability in a colluvial‐alluvial plain. GPR identified sandy lenses and clay‐rich layers, while ERT revealed deeper conductive and resistive zones, including a gneissic basement.
Nádia Mariane Mucha   +5 more
wiley   +1 more source

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