Results 61 to 70 of about 307 (169)

Declining Body Condition of Territorial Male Australian Fur Seals: Correlations With Environmental Variables

Marine Mammal Science, Volume 41, Issue 4, October 2025.
ABSTRACT The Australian fur seal ( Arctocephalus pusillus doriferus , AUFS) population, currently less than 47% of its pre‐harvest size, represents the largest resident marine predator biomass in south‐eastern Australia. This region, characterized by low marine productivity and rapid warming, is home to Kanowna Island, the third‐largest AUFS colony ...
Johanna J. Geeson, Blake M. Allan, John P. Y. Arnould   +2 more
wiley   +1 more source

Mangrove Above‐Ground Biomass and Production Are Related to Forest Age at Low Isles, Great Barrier Reef

Ecology and Evolution, Volume 15, Issue 9, September 2025.
Mangrove above‐ground biomass and productivity was quantified across forest age zones dominated by Rhizophora stylosa, spanning a tidal gradient atop a reef platform at Low Isles, Great Barrier Reef. Analysis of historical mapping, field plot data, and RPA‐derived LiDAR data and multispectral imagery indicated above‐ground biomass increased with forest
Brooke M. Conroy, Sarah M. Hamylton, Jeffrey J. Kelleway, Emma F. Asbridge, Colin D. Woodroffe, Kerrylee Rogers   +5 more
wiley   +1 more source

An isothermal workflow for low‐cost and PCR‐free field‐based community metabarcoding

Methods in Ecology and Evolution, Volume 16, Issue 7, Page 1413-1424, July 2025.
Abstract DNA metabarcoding has revolutionized our ability to monitor ecosystems. However, the method is still rarely used in developing countries where resources are limited and fieldwork is challenging. To overcome this limitation, we designed a comprehensive workflow allowing rapid community metabarcoding with minimum, self‐manufacturable equipment ...
Amadeus Plewnia, Henrik Krehenwinkel, Christopher Heine   +2 more
wiley   +1 more source

Seasonal Phragmites australis classification in Long Point National Wildlife Area wetlands using a remotely piloted aircraft system and random forest machine learning

Drone Systems and Applications
This study produced a high-accuracy remotely piloted aircraft system (RPAS) imagery classification method for identifying the invasive reed Phragmites australis (Cav.) Trin. Ex Steud subsp. australis using random forest (RF) machine learning.
Morgan Hrynyk, Amir Behnamian, Sarah Banks, Zhaohua Chen, Taylor Harmer, Patrick Kirby, Lori White, Jon Pasher, Jason Duffe   +8 more
doaj   +1 more source

Monitoring the structure of restored forests and assessing aboveground carbon density through canopy metrics derived from digital aerial photogrammetry and LiDAR

Restoration Ecology, Volume 33, Issue 5, July 2025.
Monitoring forest dynamics is crucial to understanding forest succession drivers and ensuring successful restoration outcomes. Laser scanners onboard robust drone systems are valuable for penetrating forest canopies and providing structural details. With the growing accessibility to low‐cost drones equipped with advanced optical sensors, photogrammetry
Giulio B. Santoro, Paulo G. Molin, José M. S. M. Viveiros, Giovanna de Andrade Ferreira, Vinicius M. Costa, Leo E. Haneda, Melodie K. S. D. Sinegalia, Laury Cullen Jr, Pedro H. S. Brancalion, Carlos A. Silva, Danilo R. A. de Almeida   +10 more
wiley   +1 more source

Identification of Micro-Scale Landforms of Landslides Using Precise Digital Elevation Models

Geosciences, 2019
An active gully-related landslide system is located in a deep valley under forest canopy cover. Generally, point clouds from forested areas have a lack of data connectivity, and optical parameters of scanning cameras lead to different densities of point ...
František Chudý, Martina Slámová, Julián Tomaštík, Roberta Prokešová, Martin Mokroš   +4 more
doaj   +1 more source

A comparison of established and digital surface model (DSM) ‐based methods to determine population estimates and densities for king penguin colonies, using fixed‐wing drone and satellite imagery

Remote Sensing in Ecology and Conservation, Volume 11, Issue 3, Page 294-311, June 2025.
We used fixed‐wing drones and Beyond Visual Line of Sight flying to create high‐resolution imagery and Digital Surface Models (DSMs) of six large king penguin colonies (colony population sizes ranging from 10,671 to 132,577 pairs) in South Georgia. We used a novel DSM‐based method to facilitate automated and semi‐automated counts of each colony to ...
J. Coleman, N. Fenney, P.N. Trathan, A. Fox, E. Fox, A. Bennison, L. Ireland, M.A. Collins, P.R. Hollyman   +8 more
wiley   +1 more source

Hybrid Propulsion Systems for Remotely Piloted Aircraft Systems

Aerospace, 2018
The development of more efficient propulsion systems for aerospace vehicles is essential to achieve key objectives. These objectives are to increase efficiency while reducing the amount of carbon-based emissions.
Mithun Abdul Sathar Eqbal, Nuwantha Fernando, Matthew Marino, Graham Wild   +3 more
doaj   +1 more source

Current Regulations for Transporting Medicines Using a Remotely Piloted Aircraft System (RPAS)

The document sets out three differentiated proposals for the transport of medicines through RPAS with their respective regulations, adapted to different operational categories: open category, special category and military scope. In the open category, an economical and efficient solution is prioritized for urban and rural areas, complying with weight ...
Ana Sofia Velasquez Perez, Daniel Eduardo Gonzalez Murillo, Pedro Fernando Melo Daza   +2 more
openaire   +1 more source

THE UNMANNED AERIAL VEHICLES IN INTERNATIONAL TRADE AND THEIR REGULATION

Russian Journal of Economics and Law, 2016
Objective: to review the current situation in production and distribution of unmanned aerial vehicles (further - UAVs) in developed countries, as well as the legal regulation issues.Methods: abstract-logic, summarizing and observation, comparative ...
I. Cerna
doaj   +1 more source