Results 31 to 40 of about 14,342 (223)

Polytraits : a database on biological traits of marine polychaetes [PDF]

, 2014
The study of ecosystem functioning – the role which organisms play in an ecosystem – is becoming increasingly important in marine ecological research. The functional structure of a community can be represented by a set of functional traits assigned to ...
Arvanitidis, Christos, Chatzigeorgiou, Georgios, Chatzinikolaou, Eva, Dailianis, Thanos, Fanini, Lucia, Faulwetter, Sarah, Keklikoglou, Kleoniki, Koulouri, Panayota, Markantonatou, Vasiliki, Pafilis, Evangelos, Papageorgiou, Nafsika, Pavloudi, Christina, Vasileiadou, Katerina   +12 more
core   +4 more sources

Applying a Multi-Method Framework to Analyze the Multispectral Acoustic Response of the Seafloor

Frontiers in Remote Sensing, 2022
Improvements to acoustic seafloor mapping systems have motivated novel marine geological and benthic biological research. Multibeam echosounders (MBES) have become a mainstream tool for acoustic remote sensing of the seabed.
Pedro S. Menandro, Alex C. Bastos, Benjamin Misiuk, Craig J. Brown   +3 more
doaj   +1 more source

Spatial and Temporal Changes of Tidal Inlet Using Object-Based Image Analysis of Multibeam Echosounder Measurements: A Case from the Lagoon of Venice, Italy

Remote Sensing, 2020
Scientific exploration of seabed substrata has significantly progressed in the last few years. Hydroacoustic methods of seafloor investigation, including multibeam echosounder measurements, allow us to map large areas of the seabed with unprecedented ...
Lukasz Janowski, Fantina Madricardo, Stefano Fogarin, Aleksandra Kruss, Emanuela Molinaroli, Agnieszka Kubowicz-Grajewska, Jaroslaw Tegowski   +6 more
doaj   +1 more source

A Characterisation of Benthic Currents from Seabed Bathymetry: An Object-Based Image Analysis of Cold-Water Coral Mounds

Remote Sensing, 2022
Seabed sedimentary bedforms (SSBs) are strong indicators of current flow (direction and velocity) and can be mapped in high resolution using multibeam echosounders.
Gerard Summers, Aaron Lim, Andrew J. Wheeler   +2 more
doaj   +1 more source

A Multispectral Bayesian Classification Method for Increased Acoustic Discrimination of Seabed Sediments Using Multi-Frequency Multibeam Backscatter Data

Geosciences, 2018
Multi-frequency backscatter data collected from multibeam echosounders (MBESs) is increasingly becoming available. The ability to collect data at multiple frequencies at the same time is expected to allow for better discrimination between seabed ...
Timo C. Gaida, Tengku Afrizal Tengku Ali, Mirjam Snellen, Alireza Amiri-Simkooei, Thaiënne A. G. P. van Dijk, Dick G. Simons   +5 more
doaj   +1 more source

Classification of Marine Sediment in the Northern Slope of the South China Sea Based on Improved U-Net and K-Means Clustering Analysis

Remote Sensing, 2023
The classification of marine sediment based on acoustic data is crucial for various applications such as marine resource exploitation, marine engineering construction, and marine ecological environment maintenance.
Qingjie Zhou, Xishuang Li, Lejun Liu, Jingqiang Wang, Linqing Zhang, Baohua Liu   +5 more
doaj   +1 more source

Sediment Classification of Acoustic Backscatter Image Based on Stacked Denoising Autoencoder and Modified Extreme Learning Machine

Remote Sensing, 2020
Acoustic backscatter data are widely applied to study the distribution characteristics of seabed sediments. However, the ghosting and mosaic errors in backscatter images lead to interference information being introduced into the feature extraction ...
Ping Zhou, Gang Chen, Mingwei Wang, Jifa Chen, Yizhe Li   +4 more
doaj   +1 more source

A New Radiometric Correction Method for Side-Scan Sonar Images in Consideration of Seabed Sediment Variation

Remote Sensing, 2017
Affected by the residual of time varying gain, beam patterns, angular responses, and sonar altitude variations, radiometric distortion degrades the quality of side-scan sonar images and seriously affects the application of these images. However, existing
Jianhu Zhao, Jun Yan, Hongmei Zhang, Junxia Meng   +3 more
doaj   +1 more source

Stress‐Induced Melting Controlled Failure Mechanisms of Methane Hydrate

Advanced Science, EarlyView.
We study methane hydrate via nanoindentation and nuclear magnetic resonance (NMR), finding its regional melting and mechanical properties, challenging existing views on hydrogen‐bonded crystals. Abstract Methane hydrate, a kind of nonstoichiometric crystalline, attracted worldwide attentions as a promising substitute energy. Its Dissociation is thought
Yanlong Li, Yuan Zhou, Zhengcai Zhang, Minhui Qi, Yajuan Zhang, Yujing Jiang, Yunkai Ji, Qingguo Meng, Yongfu Sun, Nengyou Wu   +9 more
wiley   +1 more source

Assessment of different models for bathymetry calculation using SPOT multispectral images in a high-turbidity area: the mouth of the Guadiana Estuary [PDF]

, 2013
Periodic calculation of coastal bathymetries can show the evolution of geomorpholo- gical features in active areas such as mesotidal estuary mouths.
Ojeda Zújar, José
core   +1 more source