Results 21 to 30 of about 82,173 (281)

Palynology, vegetation and climate of the Waikato lowlands, North Island, New Zealand, since c. 18,000 years ago [PDF]

open access: yes, 1989
The vegetational and climatic history of the Waikato lowlands during the last c. 18,000 years is inferred from the palynology of sediment cores from Lakes Rotomanuka, Rotokauri, and Okoroire.
Green, John D.   +2 more
core   +2 more sources

Simulating Growth and Competition on Wet and Waterlogged Soils in a Forest Landscape Model

open access: yesFrontiers in Ecology and Evolution, 2020
Changes in CO2 concentration and climate are likely to alter disturbance regimes and competitive outcomes among tree species, which ultimately can result in shifts of species and biome boundaries. Such changes are already evident in high latitude forests,
Eric J. Gustafson   +4 more
doaj   +1 more source

Improved bathymetry estimates beneath Amundsen Sea ice shelves using a Markov Chain Monte Carlo gravity inversion (GravMCMC, version 1) [PDF]

open access: yesGeoscientific Model Development
Bathymetry beneath ice shelves in West Antarctica plays an important role in the delivery and circulation of warm waters to the ice-shelf bottom and grounding line.
M. J. Field   +4 more
doaj   +1 more source

Livestock removal increases plant cover across a heterogeneous dryland landscape on the Colorado Plateau

open access: yesEnvironmental Research Letters, 2023
Livestock removal is increasingly used as a management option to mitigate the negative impacts of grazing-related disturbances on rangelands. Removal generally increases plant cover, but it is unclear when, where, and by how much plant and soil cover ...
B E McNellis   +8 more
doaj   +1 more source

Landsat Imagery Spectral Trajectories—Important Variables for Spatially Predicting the Risks of Bark Beetle Disturbance

open access: yesRemote Sensing, 2016
Tree mortality caused by bark beetle infestation has significant effects on the ecology and value of both natural and commercial forests. Therefore, prediction of bark beetle infestations is critical in forest management.
Martin Hais   +6 more
doaj   +1 more source

First GIC Estimates for the Mexican Power Grid

open access: yesSpace Weather, 2020
This contribution addresses the first assessment of the impact of geomagnetically induced currents (GIC) on the 400‐kV power grid of Mexico. As an initial approach, we modeled GIC using a uniform conductivity for the entire Mexican territory and ...
R. Caraballo   +3 more
doaj   +1 more source

The palaeoecology of two Scottish encrinites: Jurassic crinoid assemblages from the Trotternish Peninsula, Isle of Skye, Scotland [PDF]

open access: yes, 2009
Despite a long history of investigation, articulate crinoids from the Jurassic of Scotland have not received great attention compared to their counterparts in Southern England or continental Europe; this is thought to be largely due to poor preservation.
Clark, N.D.L., Hunter, A.W.
core   +1 more source

Influence of stiffness softening of dynamic pressure roadway two sides on roof deformation

open access: yesMeikuang Anquan, 2021
In order to clarify the influence of dynamic pressure roadway two sides stiffness softening on roof deformation, the geology and mining conditions of 3405 haulage roadway in Dayang Coal Mine are taken as the engineering background.
ZHANG Zhimin, KANG Tianhe
doaj   +1 more source

Differential resilience of ancient sister lakes Ohrid and Prespa to environmental disturbances during the Late Pleistocene [PDF]

open access: yesBiogeosciences, 2016
Ancient lakes, such as lakes Ohrid and Prespa on the Balkan Peninsula, have become model systems for studying the link between geological and biotic evolution.
E. Jovanovska   +8 more
doaj   +1 more source

Formation and preservation of the Bayan Obo Fe-REE-Nb deposit, Inner Mongolia: Insights from evidences of petrogenesis, geochemistry and apatite fission track dating

open access: yesSolid Earth Sciences, 2021
The Bayan Obo ore deposit in Inner Mongolia, North China, the largest-known rare earth element (REE) deposit in the world, has attracted considerable attention over the past decades.
Pengfei Tian   +2 more
doaj   +1 more source

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