Review
Oceanography
A. A. Vedenin, A. N. Mironov, B. A. Bluhm, M. Kaess, R. Degen, S. Galkin, A. Gebruk
Summary: This study conducted a large-scale analysis of bathymetric zonation of benthic fauna in the Arctic Ocean, which had not been previously studied on an ocean-scale. The findings showed a decrease in abundance, biomass, and diversity with increasing depth, and identified two major bathymetric boundaries. The distribution patterns and species turnover of benthos were relatively consistent throughout the Central Arctic continental slope and abyssal plain.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Multidisciplinary Sciences
Andrey Vedenin, Sergey Galkin, Alexander N. Mironov, Andrey Gebruk
Summary: The study analyzed the bathymetric distribution of Annelida, Crustacea, and Echinodermata species in the Kara, Laptev, and East Siberian seas, as well as the deep-sea Central Arctic region. It identified zones of crowding of upper and lower species range limits, with the most significant zones occurring at depths of 450-800 m and 1,800-2,000 m. These boundaries differ from those reported in other ocean regions, and possible explanations for these differences are discussed.
Article
Water Resources
Zemed Menberu, Beshah Mogesse, Daniel Reddythota
Summary: This study focuses on Lake Hawassa in the Southern Region of Ethiopia, investigating the morphological changes and deteriorating water quality's impact on agricultural productivity and socio-economic development in the region. Using GIS mapping and bathymetric mapping techniques, the study found that the lake's surface area increased while the depth and volume decreased, primarily due to sedimentation and eutrophication.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Multidisciplinary Sciences
Xiaohua Feng, Yayao Ma, Liang Gao
Summary: This paper presents a compact light field photography technique that uses simple optics and a small number of sensors to capture large-scale light fields. It enables high-speed and accurate 3D imaging and can handle severe occlusions.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Azmi Haider, Hagit Hel-Or
Summary: This paper investigates the noise of cameras and sensors, demonstrating that valuable information about scenes and objects can be obtained from the noise. Specifically, it shows that depth and location of objects can be deduced from sensor noise alone. The paper also reveals that noise distribution on surfaces can provide information about light direction and distinguish between real and masked faces. Furthermore, it shows that the size of depth shadows can authenticate objects location in the scene.
Article
Geography, Physical
Wenhao Zhang, Nan Xu, Yue Ma, Bisheng Yang, Zhiyu Zhang, Xiao Hua Wang, Song Li
Summary: The theoretical model proposed in this paper can be used to evaluate the maximum bathymetric depth for a bathymetry investigation, with errors within 14% when applying system parameters and environmental parameters.
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2021)
Article
Environmental Sciences
Jiasheng Xu, Guoqing Zhou, Sikai Su, Qiaobo Cao, Zhou Tian
Summary: Models for bathymetry retrieval from multispectral images usually neglect the errors caused by tidal fluctuation. In this paper, a rigorous model that considers the variation in tide height time series is proposed. The model was applied and validated on Weizhou Island using Landsat 8 satellite imagery, and it significantly improved the accuracy of bathymetry retrieval compared to traditional models.
Article
Environmental Sciences
Isaac Rodriguez-Padilla, Bruno Castelle, Vincent Marieu, Denis Morichon
Summary: This paper examines the influence of headlands on the morphological response of beaches and explores the potential of deriving bathymetries from video imagery. The study found that the rates of accretion/erosion within the surf zone are strongly influenced by the headland, and the beach response can be classified into three regimes depending on the angle of wave incidence. The comparison between video-derived bathymetries and surveys showed some errors, but still provided valuable insights into storm-driven morphological changes.
Article
Marine & Freshwater Biology
Diego Garcia Cordeiro Souza, Marcelo Petracco, Ana Paula Ferreira Danin, Maira Pombo
Summary: Ocypodid crabs on the Amazon coast show marked variations in burrow abundance and distribution due to rainfall and depth, with growth parameters similar to subtropical areas rather than global ecological trends. The large beach width and local climate are key factors influencing the population trends, suggesting that moisture plays a significant role in habitat utilization by these individuals.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Review
Biology
Eleanor M. Caves, Sonke Johnsen
Summary: This study focuses on the potential impact of climate change on visual perception of animals, with a specific emphasis on color. Changes in water depth may affect visual interactions across different species, highlighting the need for further research on how it impacts behavior, adaptation, and community structure.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Environmental Sciences
Astrid B. Leitner, Jeffrey C. Drazen, Craig R. Smith
Summary: Seamounts in the Clarion Clipperton Zone (CCZ) have distinct communities compared to abyssal plains, with differences driven by habitat type and productivity changes. The limited source populations on seamounts suggest they may not be sufficient to recolonize abyssal plains post-mining disturbance.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Adam L. Kaczmarek, Bernhard Blaschitz
Summary: This paper introduces a research on 3D scanning using a camera array called Equal Baseline Camera Array (EBCA), which can create a disparity map with higher precision than a stereo camera. By calibrating the array with self-calibration methods and developing new algorithms on an open-source testbed, 3D data can be obtained from images taken by the array. It also presents new results of using these arrays with different stereo matching algorithms, including ones based on convolutional neural networks and deep learning technology.
APPLIED SCIENCES-BASEL
(2021)
Article
Geochemistry & Geophysics
Guoqing Zhou, Jiasheng Xu, Haocheng Hu, Zhexian Liu, Haotian Zhang, Chao Xu, Xiang Zhou, Jiazhi Yang, Xueqin Nong, Bo Song, Naihui Song, Ke Gao, Guoshuai Jia, Hanjiang Xiong, Yiqiang Zhao
Summary: This article introduces an off-axis four-reflection optical structure for single-band B-LiDAR carried on UAV, which overcomes the limitations of traditional B-LiDAR such as large volume, heavy weight, necessity for airport and runway, and high cost. The proposed optical system considers the characteristics of laser echo energy under different water conditions. It consists of one APD detector and two PMTs detectors, along with mirrors and field mirrors for separating echo signals. Experimental results show that the maximum water depth measured can reach 25.0 m with an average error of less than 0.1 m. The dimension and weight of this LiDAR are 90 x 160 x 90 mm and 10.25 kg, respectively, making it the lightest and smallest B-LiDAR worldwide.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Remote Sensing
Guoqing Zhou, Gongbei Wu, Xiang Zhou, Chao Xu, Dawei Zhao, Jinchun Lin, Zhexian Liu, Haotian Zhang, Qingyang Wang, Jiasheng Xu, Bo Song, Lieping Zhang
Summary: This paper proposes an adaptive model for correcting the water depth bias in LiDAR point cloud data. The model is able to efficiently correct the bias by adapting to different water environments. Experimental results show that the proposed adaptive model achieves a significantly higher accuracy in correcting water depth bias compared to traditional models, with a reduction of approximately 61% in Mean Absolute Error (MAE) and 59% in Root Mean Squared Error (RMSE).
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2023)
Article
Limnology
Christopher I. Rounds, Kelsey Vitense, Gretchen J. A. Hansen
Summary: This study describes an efficient method using ImageJ to extract hypsography from bathymetric maps and validates it against digital elevation models. The results show a mean absolute difference of 0.049 between hypsographic curves extracted using ImageJ and digital elevation models, indicating accurate results. The high interobserver reliability is supported by a mean absolute difference of 0.016 between two independent users. Comparisons between digital elevation models and interpolated hypsography using maximum lake depth show significant differences. The method has been successfully applied to extract data for 1012 lakes, making it valuable for digitizing bathymetric maps.
LIMNOLOGY AND OCEANOGRAPHY-METHODS
(2023)
Article
Environmental Sciences
Jessica N. Perelman, Eric Firing, Jesse M. A. van der Grient, Benjamin A. Jones, Jeffrey C. Drazen
Summary: The Clarion-Clipperton Zone (CCZ) is a targeted area for deep-sea polymetallic nodule mining in the eastern Central Pacific Ocean, with significant variability in environmental parameters. Research indicates that midwater oxygen is the strongest predictor of behavior for mesopelagic micronekton and zooplankton in this region. The current network of reserves may not fully protect pelagic OMZ fauna most at risk from mining impacts in the licensed exploration areas.
FRONTIERS IN MARINE SCIENCE
(2021)
Review
Oceanography
Daniel O. B. Jones, Erik Simon-Lledo, Diva J. Amon, Brian J. Bett, Clemence Caulle, Louis Clement, Douglas P. Connelly, Thomas G. Dahlgren, Jennifer M. Durden, Jeffrey C. Drazen, Janine Felden, Andrew R. Gates, Magdalena N. Georgieva, Adrian G. Glover, Andrew J. Gooday, Anita L. Hollingsworth, Tammy Horton, Rachael H. James, Rachel M. Jeffreys, Claire Laguionie-Marchais, Astrid B. Leitner, Anna Lichtschlag, Amaya Menendez, Gordon L. J. Paterson, Kate Peel, Katleen Robert, Timm Schoening, Natalia A. Shulga, Craig R. Smith, Sergio Taboada, Andreas M. Thurnherr, Helena Wiklund, C. Robert Young, Veerle A. I. Huvenne
Summary: In order to protect the range of habitats, species, and ecosystem functions in the Clarion Clipperton Zone (CCZ), the International Seabed Authority (ISA) has designated nine Areas of Particular Environmental Interest (APEIs). This study focuses on APEI-6, the most north eastern APEI in the network, and assesses its representativity of mining contract areas in the eastern CCZ. The findings suggest that APEI-6 is partially representative of the exploration areas to the south yet is distinctly different in several key characteristics, indicating the need for additional APEIs and other management activities to mitigate the impacts of mining in the CCZ.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Multidisciplinary Sciences
Sonia Romero-Romero, Elizabeth C. Miller, Jesse A. Black, Brian N. Popp, Jeffrey C. Drazen
Summary: The detrital-based food web in abyssal plains relies on deposit feeders as secondary consumers, with their gut contents mainly consisting of living biomass of heterotrophic prokaryotes. The guts of deposit feeders act as hotspots of organic matter, forming a unique food source distinct from the surrounding surface detritus, and increasing the food-chain length in detritus-based ecosystems.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Jennifer M. Durden, Meagan Putts, Sarah Bingo, Astrid B. Leitner, Jeffrey C. Drazen, Andrew J. Gooday, Daniel O. B. Jones, Andrew K. Sweetman, Travis W. Washburn, Craig R. Smith
Summary: The study examined the benthic megafaunal ecology of three Areas of Particular Environmental Interest (APEIs) in the western Clarion Clipperton Zone (CCZ). It found that environmental conditions greatly influence benthic communities, with sites having lower organic matter inputs and greater nodule abundance exhibiting higher invertebrate density and diversity.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Astrid B. Leitner, Jeffrey C. Drazen, Craig R. Smith
Summary: Seamounts in the Clarion Clipperton Zone (CCZ) have distinct communities compared to abyssal plains, with differences driven by habitat type and productivity changes. The limited source populations on seamounts suggest they may not be sufficient to recolonize abyssal plains post-mining disturbance.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Guadalupe Bribiesca-Contreras, Thomas G. Dahlgren, Tammy Horton, Jeffrey C. Drazen, Regan Drennan, Daniel O. B. Jones, Astrid B. Leitner, Kirsty A. McQuaid, Craig R. Smith, Sergio Taboada, Helena Wiklund, Adrian G. Glover
Summary: Recent research has shown high genetic diversity of deep-sea scavenging amphipods in the Clarion-Clipperton Zone (CCZ) and connectivity between different regions. Differences in amphipod assemblages between abyssal and seamount sites suggest distinct ecological conditions generate unique community compositions.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Jeffrey C. Drazen, Astrid B. Leitner, Daniel O. B. Jones, Erik Simon-Lledo
Summary: Data synthesis from visual transecting approaches and baited camera studies shows significant variations in the diversity and abundance of fish and invertebrate scavenger communities across different regions of the CCZ. It is recommended that a network of APEIs covering a spectrum of habitats be established to conserve fish and scavenger biodiversity in the region.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Studies
J. M. A. van der Grient, J. C. Drazen
Summary: Research shows that the catches from mining areas in deep sea have small to moderate impacts on overall catches for some countries. However, for some island nations and developing countries, a significant proportion of their catches may come from these mining areas. It is recommended that Regional Fisheries Management Organizations and other fishery stakeholders should be aware of the potential impacts of mining activities on the fishing industry, and actively engage in the development of regulations and policies related to mining activities.
Article
Microbiology
Jessica M. Blanton, Logan M. Peoples, Mackenzie E. Gerringer, Caroline M. Iacuaniello, Natalya D. Gallo, Thomas D. Linley, Alan J. Jamieson, Jeffrey C. Drazen, Douglas H. Bartlett, Eric E. Allen
Summary: By examining the microbiome of abyssal and hadal fishes, we gain insight into the diversity and distribution of host-associated life at great depth.
Article
Environmental Studies
Diva J. Amon, Sabine Gollner, Telmo Morato, Craig R. Smith, Chong Chen, Sabine Christiansen, Bronwen Currie, Jeffrey C. Drazen, Tomohiko Fukushima, Matthew Gianni, Kristina M. Gjerde, Andrew J. Gooday, Georgina Guillen Grillo, Matthias Haeckel, Thembile Joyini, Se-Jong Ju, Lisa A. Levin, Anna Metaxas, Kamila Mianowicz, Tina N. Molodtsova, Ingo Narberhaus, Beth N. Orcutt, Alison Swaddling, Joshua Tuhumwire, Patricio Uruena Palacio, Michelle Walker, Phil Weaver, Xue-Wei Xu, Clement Yow Mulalap, Peter E. T. Edwards, Chris Pickens
Summary: A comprehensive understanding of the deep-sea environment and mining impacts is necessary to assess compliance with international regulations. However, there is a lack of available scientific knowledge to support decision-making. Further information on deep-sea environmental baselines and mining impacts is critical for this emerging industry. Closing the scientific gaps related to deep-seabed mining is a monumental task that requires clear direction, substantial resources, and robust coordination and collaboration.
Article
Multidisciplinary Sciences
Laura C. Motta, Joel D. Blum, Brian N. Popp, Blaire P. Umhau, Claudia R. Benitez-Nelson, Hilary G. Close, Spencer J. Washburn, Jeffrey C. Drazen
Summary: This study used mercury stable isotope ratios to investigate the cycling of methylmercury in marine particles and biota. The findings suggest that methylmercury is preferentially methylated within small marine particles and that these particles undergo more significant microbial decomposition compared to larger particles. The study also found that large particles in the equatorial ocean resemble fecal pellets and are distinct from small particles. The research provides additional evidence for methylation within marine particles and demonstrates the origin of mercury in different marine organisms.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Review
Oceanography
Jessica N. Perelman, Yoann Ladroit, Pablo Escobar-Flores, E. Firing, Jeffrey C. Drazen
Summary: The behaviors of micronekton and zooplankton in the eastern Pacific Ocean are poorly understood. This study used Saildrone uncrewed surface vehicles to conduct acoustic and oceanographic surveys, revealing the distribution and responses of these organisms to mesoscale oceanographic features. The results showed significant variability in pelagic community dynamics on daily to weekly scales and highlighted the importance of understanding the interactions between mesoscale features and pelagic fauna in a changing ocean environment.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Environmental Sciences
J. M. A. Grient, J. C. Drazen
Summary: The study shows that animal responses to increased suspended sediment concentrations are generally negative and similar across different aquatic habitats. Further research is needed to understand the specific impacts of increased sediment concentrations in deep-sea environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Javier Montenegro, Allen G. G. Collins, Russell R. R. Hopcroft, Jennifer M. M. Questel, Erik V. V. Thuesen, Tiffany S. S. Bachtel, Leah A. A. Bergman, Mehul N. N. Sangekar, Jeffrey C. C. Drazen, Dhugal J. J. Lindsay
Summary: Through the examination of legacy collections, it was found that there is no clear differentiation between the two nominal species, B. ellinorae and B. brucei, suggesting that B. ellinorae should be reclassified as a subspecies of B. brucei.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Oceanography
Jeffrey C. Drazen, Bethanie H. Clark, Jamison M. Gove, Jana E. Phipps, Adrienne M. Copeland, Joey Lecky, J. A. Mattias Green, Donald R. Kobayashi, John R. Turner, Jonathan L. Whitney, Gareth J. Williams
Summary: The nearshore environment off the west coast of Hawaii exhibits an increased biomass and abundance of mesopelagic micronekton compared to offshore sites. This nearshore enhancement may be due to increased primary production near the island or complex flow environment. The non-migratory deep scattering assemblage in this region may provide food for deeper diving marine mammals and pelagic fishes.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2023)
Article
Oceanography
Pernille Tonnesen, Shane Gero
Summary: Studying the behavior of deep-sea animals is challenging, but animal-borne camera tags may help understand predator-prey interactions. Research showed that camera-associated white light may affect foraging behavior, but has minimal long-term fitness impact on sperm whales. However, this impact should be considered and monitored for longer camera tag deployments.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2024)
Article
Oceanography
Sarah N. de Mendonca, Anna Metaxas
Summary: Ecological processes impact spatial patterns in abundance and distribution of megafauna. This study used spatial statistics to identify significant megafaunal patterns in the Laurentian Channel Marine Protected Area. The patterns varied among taxa and were related to geological factors. The study highlights the importance of considering fine-scale patterns and provides insights for ecological research, monitoring, and conservation in deep-sea ecosystems.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2024)