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Monitoring aquatic plants: An evaluation of hydroacoustic, on-site digitising and airborne remote sensing techniques

Jerom R. Stocks, Michael P. Rodgers, Joe B. Pera, Dean M. Gilligan
2019 Knowledge and Management of Aquatic Ecosystems  
Variation in estimates of macrophyte coverage were observed between methodologies.  ...  The utility of sidescan sonar could be improved when used in conjunction with on-site handheld PDA mapping.  ...  This study was funded by the Invasive Animals Cooperative Research Centre and New South Wales Department of Primary Industries, Fisheries NSW.  ... 
doi:10.1051/kmae/2019016 fatcat:eypvvmq5tfggpi24vmgyvt4itu

3D-view Generation and Species Classification of Aquatic Plants Using Acoustic Images

Chunhui XU, Katsunori MIZUNO, Akira ASADA, Kazuki ABUKAWA, Masumi YAMAMURO
2013 The Journal of the Marine Acoustics Society of Japan  
Acknowledgments The first experiment from July 27 to July 30,  ...  system and processing methods, are the focus of ongoing studies on this system. ies have reported the feasibility of high resolution acoustic image of the aquatic plants in shallow area.  ...  In shallow area, sonar systems using high frequency in the MHz order has been commonly used for the survey of the aquatic plant since the sonar enables to obtain the high resolution spatial data, which  ... 
doi:10.3135/jmasj.40.14 fatcat:uneuytypxjgunjfvs23icc72be

Imaging and Classification Techniques for Seagrass Mapping and Monitoring: A Comprehensive Survey [article]

Md Moniruzzaman, S. M. Shamsul Islam, Paul Lavery, Mohammed Bennamoun, C. Peng Lam
2019 arXiv   pre-print
, fully automated seagrass detectors that can work in real-time, accurate techniques for estimating the seagrass density, and the availability of high computation facilities for processing large scale  ...  Monitoring underwater habitats is a vital part of observing the condition of the environment.  ...  One of the earliest approaches of using this high spatial resolution image was performed by Hochberg et al. [37] .  ... 
arXiv:1902.11114v2 fatcat:cctkhtbc2bg73pfenrkbmxq3ay

Remote Sensing of Kelp (Laminariales, Ochrophyta): Monitoring Tools and Implications for Wild Harvesting

Matthew Bennion, Jessica Fisher, Chris Yesson, Juliet Brodie
2018 Reviews in Fisheries Science & Aquaculture  
Advances are being made in acoustic 41 monitoring, particularly multibeam sonar.  ...  This study reviews the potential for remote sensing in macroalgal studies, with an 37 emphasis on kelp and provides a conceptual framework to support the development of 38 standardised monitoring protocols  ...  Acknowledgements 440 The authors would like to express their thanks to The Crown Estate for funding this study.  ... 
doi:10.1080/23308249.2018.1509056 fatcat:u5kdui6gebhp3e25othhmidd5i

Seasonal and spatial variations of water quality, substrate and aquatic macrophytes based on side scan sonar, in an eastern Mediterranean lagoon (Kaiafas, Ionian Sea)

Chrysoula Christia, Eva Papastergiadou, George Papatheodorou, Maria Geraga, Emmanouil Papadakis
2013 Environmental Earth Sciences  
Sediment texture and distribution of macrophytes were detected through the acoustic side scan sonar method, which proved to be a promising tool for defining and monitoring vegetation coverage of shallow  ...  Meadows of P. pectinatus were established to the lagoon limits where high turbidity and silty substrate occurred, while C. hispida f. corfuensis was limited in deep and high transparent waters with sandy  ...  Acknowledgments This study received funding from the Research committee of Patras University and from the Grants of Plant Ecology division.  ... 
doi:10.1007/s12665-013-2746-8 fatcat:ubko7zaolfcwzg6ymyals6xlaq

Satellite Multi/Hyper Spectral HR Sensors for Mapping the Posidonia oceanica in South Mediterranean Islands

Flavio Borfecchia, Carla Micheli, Luigi De Cecco, Gianmaria Sannino, Maria Vittoria Struglia, Alcide Giorgio Di Sarra, Carlo Gomez, Giuliana Mattiazzo
2021 Sustainability  
innovative calibration and sea truth collecting methods, for monitoring and mapping of PO meadows under stress, in the coastal waters of these islands, located in the Sicily Channel, to better support  ...  Earth Observation (EO) data, provided by high resolution (HR) multi/hyperspectral operative satellite sensors of the last generation (i.e., Sentinel 2 MSI and PRISMA) have been successfully tested, using  ...  In addition, the authors acknowledge the partnership agreement between ENEA and CNR-IBE for the CAL/VAL activity of the PRISMA sensor (PRISCAV project), supported by ASI.  ... 
doi:10.3390/su132413715 fatcat:d5qsqblvwrcntga3fehg2ahcna

Use of a 600-kHz Acoustic Doppler Current Profiler to measure estuarine bottom type, relative abundance of submerged aquatic vegetation, and eelgrass canopy height

Joseph D. Warren, Bradley J. Peterson
2007 Estuarine, Coastal and Shelf Science  
vegetation) in a shallow-water estuary (Shinnecock Bay, NY, USA).  ...  These methods may provide a means to rapidly survey estuarine habitats and measure spatial and temporal variations in SAV populations, as well as changes in the height of the eelgrass canopy.  ...  Acknowledgments This work was funded by a grant from the NOAA/UNH Cooperative Institute for Coastal and Estuarine Environmental Technology, NOAA grant NA17OZ2507 and grant R/CCP-10 from New York Sea Grant  ... 
doi:10.1016/j.ecss.2006.10.026 fatcat:x3knicnalzgipnj5b2jegzcs6e

A Review of Remote Sensing of Submerged Aquatic Vegetation for Non-Specialists

Gillian S.L. Rowan, Margaret Kalacska
2021 Remote Sensing  
The success of previous work generally depended on the variability in, and suitability of, the available training data, the data's spatial and spectral resolutions, the quality of the water column corrections  ...  Applying RS to underwater ecosystems is complicated by the water column as water, and dissolved or suspended particulate matter, interacts with the same energy that is reflected or emitted by the target  ...  The funders had no role in the design of the study; in the collection, analyses or interpretation of data; in the writing of the manuscript or in the decision to publish the results.  ... 
doi:10.3390/rs13040623 fatcat:pc3n7p3afzb3ras7pc22jq5ewm

MSc Thesis Research Proposal 'Seagrass mapping and monitoring along the coast of Crete, Greece'

Polina Lemenkova
2018 Figshare  
The seagrasses, a unique group of aquatic plants growing submerged in sea water, create unique, complex, extremely diversified and productive ecological systems in the littoral coastal zones between 0-  ...  50 meters in shallow waters all over the world, and serve as a valuable environmental indicators for the marine ecosystems health.  ...  Validation of the results has been performed using acoustic survey and shown pretty high (84%) accuracy.  ... 
doi:10.6084/m9.figshare.7357889.v1 fatcat:l3tmqa6c5zgifho54dom24bavy

Autonomous Systems for the Environmental Characterization of Lagoons [chapter]

Monica Rivas Casado, Marco Palma, Paul Leinster
2020 Lagoon Environments Around the World - A Scientific Perspective  
Recent technological advances in UAVs, AUVs and ROVs have demonstrated that high-resolution data (e.g. 0.4 cm imagery resolution) can be gathered when bespoke sensors are incorporated within these platforms  ...  The chapter will be based on recent peer-reviewed research outputs obtained by the authors.  ...  [14, 15] Other aquatic flora This includes floating (emergent) and submerged plants.  ... 
doi:10.5772/intechopen.90405 fatcat:jwkr3r3mqrhrnkrvjesypsh2xm

Analyzing the status of submerged aquatic vegetation using novel optical parameters

Luiz H. S. Rotta, Deepak R. Mishra, Enner H. Alcântara, Nilton N. Imai
2016 International Journal of Remote Sensing  
The overall goal of this study was to assess the radiation availability in the water column in the Nova Avanhandava Reservoir and analyse its influence on SAV development and growth.  ...  Locations with high transparency (lower K d ) also favoured the development of tall SAV compared to areas of high K d .  ...  Disclosure statement No potential conflict of interest was reported by the authors.  ... 
doi:10.1080/01431161.2016.1204027 fatcat:xxa2ijpbnbes7mgwis7kwp3chu

Predicting spatial kelp abundance in shallow coastal waters using the acoustic ground discrimination system RoxAnn

F. Mielck, I. Bartsch, H.C. Hass, A.-C. Wölfl, D. Bürk, C. Betzler
2014 Estuarine, Coastal and Shelf Science  
However, in turbid coastal waters, such as off the island of Helgoland (Germany, North Sea), the kelp vegetation is present in shallow water depths normally excluded from hydroacoustic surveys.  ...  It became evident that the occurrence of kelp in this area is not simply linked to water depth.  ...  This study was performed in the frame of the joint research project WIMO ("Wissenschaftliche Monitoring Konzepte in der Deutschen Bucht").  ... 
doi:10.1016/j.ecss.2014.03.016 fatcat:xgh5yf3rizf3tm6ye2a74hp5ie

Applications of Unmanned Aerial Systems (UASs) in Hydrology: A Review

Mercedes Vélez-Nicolás, Santiago García-López, Luis Barbero, Verónica Ruiz-Ortiz, Ángel Sánchez-Bellón
2021 Remote Sensing  
With unparalleled spatial and temporal resolutions and product-tailoring possibilities, UAS are contributing to the acquisition of large volumes of data on water bodies, submerged parameters and their  ...  This paper provides a comprehensive review of 122 works on the applications of UASs in surface water and groundwater research with a purpose-oriented approach.  ...  The authors also want to express their gratitude to the reviewers and in particular, to Ulf Mallast, whose encouraging and insightful comments have greatly contributed to improve this review.  ... 
doi:10.3390/rs13071359 fatcat:en3b3kcksbg7xjoksug2eqqylu

Fine‐structure processing, frequency selectivity and speech perception in hearing‐impaired listeners

Olaf Strelcyk, Torsten Dau
2008 Journal of the Acoustical Society of America  
Degree of intensity dip has the strongest effect, with a minimal dip in intensity more likely to be perceived as 'kneel' and a strong dip in intensity more likely to be perceived as 'needle. ' The results  ...  Presence vs. absence of a dip in intensity, duration of that dip, and degree of that dip in decibels are manipulated.  ...  water are investigated for standing wave fields in the megasonic range by high-speed imaging.  ... 
doi:10.1121/1.2935148 fatcat:nqyyia5pubamnhqgonegghrudm

Speaker comfort and increase of voice level in lecture rooms

Jonas Brunskog, Anders C. Gade, Gaspar Payà Bellester, Lilian Reig Calbo
2008 Journal of the Acoustical Society of America  
Degree of intensity dip has the strongest effect, with a minimal dip in intensity more likely to be perceived as 'kneel' and a strong dip in intensity more likely to be perceived as 'needle. ' The results  ...  Presence vs. absence of a dip in intensity, duration of that dip, and degree of that dip in decibels are manipulated.  ...  water are investigated for standing wave fields in the megasonic range by high-speed imaging.  ... 
doi:10.1121/1.2934367 fatcat:xr6gp4ldo5bylnxytx2iumrdmi
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