Very high resolution mapping of coral reef state using airborne bathymetric LiDAR surface-intensity and drone imagery DOI
Antoine Collin,

Camille Ramambason,

Yves Pastol

et al.

International Journal of Remote Sensing, Journal Year: 2018, Volume and Issue: 39(17), P. 5676 - 5688

Published: July 24, 2018

Very high resolution (VHR) airborne data enable detection and physical measurements of individual coral reef colonies. The bathymetric LiDAR system, as an active remote sensing technique, accurately computes the ecosystem's surface reflectance using a single green wavelength at decimetre scale over 1-to-100 km2 areas. A passive multispectral camera mounted on drone can build blue-green-red (BGR) orthorectified mosaic centimetre 0.01-to-0.1 combination these technologies is used for first time here to map ecological state submeter scale. Airborne BGR values (0.03 m pixel size) serve calibrate intensity (0.5 size). classification five states then mapped through artificial neural network (ANN). was developed small area (0.01 km2) in lagoon Moorea Island (French Polynesia) VHR extended whole (46.83 km2). ANN calibrated with 275 samples determine class LiDAR-based predictors; then, validated 135 samples, reaching satisfactory performance (overall accuracy = 0.75).

Language: Английский

Drones for Conservation in Protected Areas: Present and Future DOI Creative Commons
Jesús Jiménez, Margarita Mulero‐Pázmány

Drones, Journal Year: 2019, Volume and Issue: 3(1), P. 10 - 10

Published: Jan. 9, 2019

Park managers call for cost-effective and innovative solutions to handle a wide variety of environmental problems that threaten biodiversity in protected areas. Recently, drones have been called upon revolutionize conservation hold great potential evolve raise better-informed decisions assist management. Despite expectations, the benefits could bring foster effectiveness remain fundamentally unexplored. To address this gap, we performed literature review about use conservation. We selected total 256 studies, which 99 were carried out classified studies five distinct areas applications: “wildlife monitoring management”; “ecosystem monitoring”; “law enforcement”; “ecotourism”; “environmental management disaster response”. also identified specific gaps challenges would allow expansion critical research or monitoring. Our results support evidence merits serve actions reinforce effective management, but multidisciplinary must resolve operational analytical shortcomings undermine prospects integration

Language: Английский

Citations

252

Beach nourishment has complex implications for the future of sandy shores DOI
Matthieu A. de Schipper, Bonnie C. Ludka, Britt Raubenheimer

et al.

Nature Reviews Earth & Environment, Journal Year: 2020, Volume and Issue: 2(1), P. 70 - 84

Published: Nov. 24, 2020

Language: Английский

Citations

204

Mapping and Classification of Ecologically Sensitive Marine Habitats Using Unmanned Aerial Vehicle (UAV) Imagery and Object-Based Image Analysis (OBIA) DOI Creative Commons
Daniele Ventura, Andrea Bonifazi, Maria Flavia Gravina

et al.

Remote Sensing, Journal Year: 2018, Volume and Issue: 10(9), P. 1331 - 1331

Published: Aug. 21, 2018

Nowadays, emerging technologies, such as long-range transmitters, increasingly miniaturized components for positioning, and enhanced imaging sensors, have led to an upsurge in the availability of new ecological applications remote sensing based on unmanned aerial vehicles (UAVs), sometimes referred “drones”. In fact, structure-from-motion (SfM) photogrammetry coupled with imagery acquired by UAVs offers a rapid inexpensive tool produce high-resolution orthomosaics, giving ecologists way responsive, timely, cost-effective monitoring processes. Here, we adopted lightweight quadcopter survey object-based image analysis (OBIA) workflow demonstrate strength methods producing very high spatial resolution maps sensitive marine habitats. Therefore, three different coastal environments were mapped using autonomous flight capability UAV equipped fully stabilized consumer-grade RGB digital camera. particular investigated Posidonia oceanica seagrass meadow, rocky coast nurseries juvenile fish, two sandy areas showing biogenic reefs Sabelleria alveolata. We adopted, first time, UAV-based raster thematic these key habitats, produced after OBIA classification, method fine-scale, low-cost, time saving characterization which may lead more effective efficient management natural resources.

Language: Английский

Citations

187

UAV remote sensing applications in marine monitoring: Knowledge visualization and review DOI

Zongyao Yang,

Xueying Yu, Simon Dedman

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 838, P. 155939 - 155939

Published: May 13, 2022

Language: Английский

Citations

183

Location, location, location: considerations when using lightweight drones in challenging environments DOI Creative Commons
James P. Duffy, Andrew M. Cunliffe, Leon DeBell

et al.

Remote Sensing in Ecology and Conservation, Journal Year: 2017, Volume and Issue: 4(1), P. 7 - 19

Published: Aug. 22, 2017

Abstract Lightweight drones have emerged recently as a remote sensing survey tool of choice for ecologists, conservation practitioners and environmental scientists. In published work, there are plentiful details on the parameters settings used successful data capture, but in contrast is dearth information describing operational complexity drone deployment. Information about practices flying field, whilst currently lacking, would be useful others embarking new drone‐based investigations. As group drone‐piloting scientists, we operated lightweight research over 25 projects, 10 countries, polar, desert, coastal tropical ecosystems, with many hundreds hours experience between us. The purpose this paper was to document lesser‐reported methodological pitfalls deployments so that other scientists can understand spectrum considerations need accounted prior to, during flights. Herein, describe most common challenges encountered, alongside mitigation remediation actions increase chances safe capture. Challenges grouped into following categories: (i) pre‐flight planning, (ii) flight operations, (iii) weather, (iv) redundancy, (v) quality, (vi) batteries. We also discuss importance undertaking ethical assessment their practices, identify mitigate potential conflicts associated use particular areas. By sharing our experience, intention will assist those deployments, increasing efficacy acquiring high‐quality from proximal aerial viewpoint.

Language: Английский

Citations

180

Principles and practice of acquiring drone-based image data in marine environments DOI
Karen E. Joyce, Stephanie Duce, Susannah M. Leahy

et al.

Marine and Freshwater Research, Journal Year: 2018, Volume and Issue: 70(7), P. 952 - 952

Published: July 12, 2018

With almost limitless applications across marine and freshwater environments, the number of people using, wanting to use, remotely piloted aircraft systems (or drones) is increasing exponentially. However, successfully using drones for data collection mapping often preceded by hours researching drone capabilities functionality followed numerous limited-success flights as users tailor their approach through trial error. Working over water can be particularly complex published research rarely documents methodology practical information in sufficient detail allow others, with little remote pilot experience, replicate them or learn from mistakes. This frustrating expensive, when working locations where window access small. The aim this paper provide a guide drone-based acquisition considerations. We hope minimise amount error required obtain high-quality, map-ready outlining principles practice drones, environments. Importantly, our recommendations are grounded sensing photogrammetry theory so that collected appropriate making measurements conducting quantitative analysis.

Language: Английский

Citations

180

Coral Reef Monitoring, Reef Assessment Technologies, and Ecosystem-Based Management DOI Creative Commons
David Obura, Greta S. Aeby,

Natchanon Amornthammarong

et al.

Frontiers in Marine Science, Journal Year: 2019, Volume and Issue: 6

Published: Sept. 19, 2019

Coral reefs are exceptionally biodiverse, and human dependence on their ecosystem services is high. Reefs experience significant direct indirect anthropogenic pressures, provide a sensitive indicator of coastal ocean health, climate change acidification, with associated implications for society. Monitoring coral reef status trends essential to better inform science, management policy, but the projected collapse systems within few decades makes provision accurate actionable monitoring data urgent. The Global Reef Network has been foundation global reporting two decades, entering into new phase improved operational standards incorporating Essential Ocean Variables (EOVs) (www.goosocean.org/eov) Framework Observing developed by System. Three EOVs robust description health: hard cover composition, macro-algal canopy cover, fish diversity abundance. A quality model based comprehensive metadata designed facilitate maximum coverage data, tangible steps track capacity building. Improved events such as mass bleaching disease outbreaks, citizen science socio-economic have potential greatly improve relevance managers stakeholders, address complex multi- dimensional interactions between people. XX THERE IS SOMETHING WRONG IN THE ABSTRACT WORD LIMIT, ONE MORE PARAGRAPH WAS INCLUDED ORIGINAL TEXT!!

Language: Английский

Citations

173

Analysis of barriers to implement drone logistics DOI
Bhawesh Sah, Rohit Gupta, Dana Bani-Hani

et al.

International Journal of Logistics Research and Applications, Journal Year: 2020, Volume and Issue: 24(6), P. 531 - 550

Published: June 23, 2020

Companies are adopting innovative methods for responsiveness and efficiency in the logistics sector. The implementation of drones sector is a move this direction. Potential obstacles smooth adoption must be thoroughly analysed. present study identifies prioritises barriers drone based on their criticality by using fuzzy Delphi method (FDM) analytic hierarchy process (AHP). Initially, 34 identified through expert opinion extensive literature review. Furthermore, relevant finalised among all FDM. Finally, prioritisation done AHP technique. concludes that regulations threat to privacy & security most critical implement Public perception psychological, environmental, technical issues, economic aspects other barriers. managerial implications findings could help practitioners policymakers effective also discussed.

Language: Английский

Citations

141

The Drone Revolution of Shark Science: A Review DOI Creative Commons
Paul A. Butcher, Andrew P. Colefax, Robert Gorkin

et al.

Drones, Journal Year: 2021, Volume and Issue: 5(1), P. 8 - 8

Published: Jan. 21, 2021

Over the past decade, drones have become a popular tool for wildlife management and research. Drones shown significant value animals that were often difficult or dangerous to study using traditional survey methods. In five years drone technology has commonplace shark research with their use above, more recently, below water helping minimise knowledge gaps about these cryptic species. enhanced our understanding of behaviour are critically important tools, not only due importance conservation in ecosystem, but also help encounters humans. To provide some guidance future relation sharks, this review provides an overview how currently used critical context monitoring. We show been fill around fundamental behaviours movements, social interactions, predation across multiple species scenarios. further detail advancement sensors, automation, artificial intelligence improving abilities data collection analysis opening opportunities shark-related beach safety. An investigation shark-based potential underwater (ROV/AUV) is provided. Finally, baseline observations pioneered recommendations might be enhance future.

Language: Английский

Citations

110

Unoccupied Aircraft Systems in Marine Science and Conservation DOI Open Access
David W. Johnston

Annual Review of Marine Science, Journal Year: 2018, Volume and Issue: 11(1), P. 439 - 463

Published: July 18, 2018

The use of unoccupied aircraft systems (UASs, also known as drones) in science is growing rapidly. Recent advances microelectronics and battery technology have resulted the rapid development low-cost UASs that are transforming many industries. Drones poised to revolutionize marine conservation, they provide essentially on-demand remote sensing capabilities at low cost with reduced human risk. A variety multirotor, fixed-wing, transitional UAS platforms capable carrying various optical physical sampling payloads being employed almost every subdiscipline conservation. This article provides an overview sensors used conservation missions along example physical, biological, natural resource management applications typical analytical workflows. It concludes details on potential effects wildlife a look future

Language: Английский

Citations

158