Results 91 to 100 of about 109,024 (352)

Investigating boreal forest successional stages in Alaska and Northwest Canada using UAV‐LiDAR and RGB and a community detection network

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
This study develops a novel application of UAV‐LiDAR and Red Green Blue (RGB) data and network analysis to enhance our understanding of boreal forest succession. The results indicate that tree height and spectral variables are the most influential predictors of plant functional type in random forest algorithms, and high overall accuracies were attained.
Léa Enguehard   +9 more
wiley   +1 more source

An overview of ABoVE airborne campaign data acquisitions and science opportunities

open access: yesEnvironmental Research Letters, 2019
The 2017 Arctic Boreal Vulnerability Experiment Airborne Campaign (AAC) was one of the largest, most complex airborne science experiments conducted by NASA’s Earth Science Division.
C E Miller   +13 more
doaj   +1 more source

The effect of a permafrost disturbance on growing-season carbon-dioxide fluxes in a high Arctic tundra ecosystem [PDF]

open access: yesBiogeosciences, 2016
Soil carbon stored in high-latitude permafrost landscapes is threatened by warming and could contribute significant amounts of carbon to the atmosphere and hydrosphere as permafrost thaws.
A. E. Cassidy   +2 more
doaj   +1 more source

A Skin‐Changing Grass: Annual Bluegrass, Which Is Not so Annual

open access: yes
The Bulletin of the Ecological Society of America, EarlyView.
Agnieszka Rudak   +2 more
wiley   +1 more source

Teaching financial crises: A leverage experiment

open access: yesSouthern Economic Journal, EarlyView.
Abstract College students often struggle to understand the prevalence of asset price bubbles and the difficulty of timing asset purchases and sales. Even economics students are consistently surprised when bubbles burst. These breaks can have real macroeconomic effects, particularly when the price surge is fueled by leverage.
Lee Coppock, Daniel Harper, Charles Holt
wiley   +1 more source

Generalization of heterogeneous alpine vegetation in air photo-based image classification, Latnjajaure catchment, northern Sweden

open access: yesPirineos: Revista de Ecología de Montaña, 2006
Hemos llevado a cabo la cartografía de la vegetación alpina a escala media (nivel de cuenca experimental) mediante interpretación remota. Esta metodología plantea dificultades debido a la distribución en mosaico de la vegetación y a la heterogeneidad del
K. E. M. Lindblad, R. Nyberg, U. Molau
doaj   +1 more source

A comparison of thermal drones and camera trap population estimates for Sitka black‐tailed deer in Alaska

open access: yesWildlife Biology, EarlyView.
One of the most difficult challenges for wildlife managers is reliably estimating wildlife populations. Camera traps combined with spatial capture–recapture (SCR) models are a popular tool for population estimation. They have limitations, however, including long data processing times.
Shannon P. Finnegan   +5 more
wiley   +1 more source

A high‐altitude thermal infrared method for estimating moose abundance and demography in Rocky Mountain National Park, USA

open access: yesWildlife Biology, EarlyView.
Resource managers require accurate estimates of large herbivore abundance and demography to maintain ecological integrity. Common methods to count these species, including observations from low altitude helicopter flights, may conflict with other protected area management objectives and struggle to produce precise estimates for more cryptic species. To
Hanem G. Abouelezz, N. Thompson Hobbs
wiley   +1 more source

Smooth the Dying Pillow: Alaska Natives and Their Destruction [original paper] [PDF]

open access: yes, 1988
A slightly revised version of this paper was published as: Conn, Stephen. (1990). "Smooth the Dying Pillow: Alaska Natives and Their Destruction." Law & Anthropology: Internationales Jahrbuch für Rechtsanthropologie [International Yearbook for Legal
Conn, Stephen
core  

Identifying multidisciplinary research gaps across Arctic terrestrial gradients

open access: yesEnvironmental Research Letters, 2019
Global warming is driving environmental change in the Arctic. However, our current understanding of this change varies strongly among different environmental disciplines and is limited by the number and distribution of field sampling locations.
A-M Virkkala   +3 more
doaj   +1 more source

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