Results 211 to 220 of about 3,644,068 (320)

Accounting for animal movement during aerial imaging surveys

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Animals are not stationary during aerial surveys; if their movements are related to the movement of the aerial platform, then bias can be introduced into subsequent population count estimates. We sought to establish a framework for assessing the impacts of animal movement on count error and platform bias by comparing aggregated counts and relative ...
Rowan L. Converse   +5 more
wiley   +1 more source

Quantifying Migratory Bat Movements in Central Europe Across Seasons and Years Using a Vertical‐Looking Radar

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Vertical‐looking radar provides a first multi‐year analysis of migratory bat phenology in Europe. Bat activity was lowest in winter, increased from spring, and peaked in summer, with similar timing of pre‐ and post‐maternity migrations across years.
Silvia Giuntini   +5 more
wiley   +1 more source

Efficient and Accurate Spatio‐Temporal Population Monitoring of Mobile Animals Using Drones and Computer Vision

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Drones and computer vision offer an efficient way to estimate animal populations over localized areas, but surveys often require stitching many overlapping images together. If animals move during the survey, traditional orthomosaic‐based counting methods become unreliable, with some animals appearing in multiple locations while others appear not at all,
Benjamin Koger   +5 more
wiley   +1 more source

How Passive Acoustic and Traditional Monitoring Estimate Bird Diversity Across Habitats

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
We compared traditional bird counts (PC) with passive acoustic monitoring (PAM) in a heterogeneous Alpine landscape. PAM recorded twice as many species, with a strong correlation between species richness and the bird counts (rs = 0.71); however, there were significant differences depending on habitat type.
Jarek Scanferla   +7 more
wiley   +1 more source

Reliability of Manual Counting for Thermal Census of Bats Within Human‐Made Structures

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Bats have a critical role in ecosystems worldwide, but monitoring their populations remains challenging, particularly in complex roosts within human‐made structures. We examined the reliability of manual bat counts from thermal infrared video, a method widely used to estimate populations and evaluate computer vision censusing approaches.
Sarah K. Lagattuta   +3 more
wiley   +1 more source

Remote Sensing‐Based Identification of Habitat Loss for Herbivorous Waterbirds Driven by Wetland Inundation Alterations

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
We present a deep learning framework integrating remote sensing and SHAP interpretation to map 22‐year habitat dynamics of herbivorous waterbirds in Dongting Lake. Results show nearly 50% habitat loss, driven primarily by hydrological recession timing rather than static inundation extent.
Dongshuo Lu   +6 more
wiley   +1 more source

Achieve Sustainability by Easing Population to 4 Billion by 2200

open access: yesSustainable Development, EarlyView.
ABSTRACT The past century of massive increases in human population and resource use has seen many undesirable environmental effects, ranging from biodiversity loss to climate change. But a research gap exists, as the ultimate causes are often not described with precision or mentioned at all.
Mark Keegan   +10 more
wiley   +1 more source

Migration of birds

open access: yes, 1979
Frederick Charles Lincoln   +3 more
openaire   +2 more sources

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