Results 61 to 70 of about 264,922 (250)

Diversity, distribution and composition of abyssal benthic Isopoda in a region proposed for deep-seafloor mining of polymetallic nodules: a synthesis

Marine Biodiversity, 2023
Due to the increasing challenge of meeting human demands for metals from land-based resources, interest in extracting mineral ores from the deep sea has gained momentum in recent years.
S. Kaiser, Magdalini Christodoulou, A. Janssen, T. Kihara, Inga Mohrbeck, F. Pasotti, S. Schnurr, A. Vink, P. M. Arbizu   +8 more
semanticscholar   +1 more source

Experimental seabed disturbance effects on Chatham Rise deep‐sea meiofaunal communities, Southwest Pacific

New Zealand Journal of Marine and Freshwater Research, Volume 59, Issue 5, Page 1388-1421, December 2025.
ABSTRACT Growing global demand for deep‐sea resources may lead to increased pressure on benthic ecosystems. Here we examined changes in meiofaunal communities following an in situ physical disturbance experiment. A significant change in meiofaunal community structure in surface (0‐1 cm) and subsurface (1‐5 cm) sediments was observed immediately ...
Daniel Leduc, Campbell Murray, Ashley A. Rowden, Scott D. Nodder, Rachel Hale, Malcolm R. Clark   +5 more
wiley   +1 more source

Limited Spatial and Temporal Variability in Meiofauna and Nematode Communities at Distant but Environmentally Similar Sites in an Area of Interest for Deep-Sea Mining

Frontiers in Marine Science, 2017
To be able to adequately assess potential environmental impacts of deep-sea polymetallic nodule mining, the establishment of a proper environmental baseline, incorporating both spatial and temporal variability, is essential.
Ellen Pape, Tania N. Bezerra, Freija Hauquier, Ann Vanreusel   +3 more
doaj   +1 more source

Effects of experimental in situ seabed disturbance on deep‐sea macrofaunal communities of Chatham Rise, Southwest Pacific

New Zealand Journal of Marine and Freshwater Research, Volume 59, Issue 5, Page 1422-1459, December 2025.
ABSTRACT With the possibility of deep‐sea mining of mineral resources occurring, it is necessary to understand potential impacts on benthic communities. Previous simulated mining experiments revealed direct benthic impacts; however, indirect impacts of sedimentation are not well understood.
Campbell Murray, Ashley A. Rowden, Daniel Leduc, Scott D. Nodder, Rachel Hale, Jane Halliday, Malcolm R. Clark   +6 more
wiley   +1 more source

Almost billfish: convergent longirostry, micro‐dentition, and possible glandular sinuses in a large teleost fish from the Upper Cretaceous of Northern Italy

Journal of Anatomy, Volume 247, Issue 6, Page 1109-1130, December 2025.
A fossil rostrum fragment of a large teleost fish from the Upper Cretaceous of Northern Italy reveals remarkable anatomical convergences with Cenozoic and Recent billfishes (marlins, swordfishes, and akin). The extinct group Plethodidae independently acquired a long snout, micro‐teeth, and oil‐gland sinuses well before the evolution of true billfishes.
Giovanni Serafini, Jürgen Kriwet, Tommaso Toldo, Eliana Fornaciari, Jacopo Amalfitano, Giorgio Carnevale   +5 more
wiley   +1 more source

Hydrogenetic and Diagenetic Controls on the Specific Surface Area of Polymetallic Nodules in Deep Ocean Basins

Minerals, 2023
Polymetallic nodules (nodules) are a predominant deep-sea mineral resource due to theirenrichment with critical metals, such as Co, Ni, and Cu, and rare earth elements (REEs).
X. Ren, Haonan Li, Shijuan Yan, Huaiming Li, Xuefa Shi   +4 more
semanticscholar   +1 more source

Characterization, Calcination and Pre-Reduction of Polymetallic Manganese Nodules by Hydrogen and Methane

Metals, 2022
A polymetallic manganese nodule was characterized and further calcined and pre-reduced by H2, CH4, and H2-CH4 mixtures at elevated temperatures. It was found that the main Mn and Fe elements coexisted in the ore in different minerals, and the Mn/Fe ratio
Ole Kristian Brustad, Jonas Låstad, Arman Hoseinpur, Jafar Safarian   +3 more
doaj   +1 more source

Millennial‐Scale Hydrothermal Variability at the Carlsberg Ridge Driven by Sea‐Level Change and Transient Magmatism

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Hydrothermal systems at mid‐ocean ridges (MORs) mediate the transfer of heat and geochemical fluxes from the mantle to the hydrosphere, facilitating fluid‐rock interaction and metal cycling. While short‐term hydrothermal dynamics are well studied, the long‐term response of these systems at slow‐spreading ridges to glacial‐interglacial sea ...
Sayantan De, Sunil Kumar Singh, Robin John   +2 more
wiley   +1 more source

The Stability of Manganese Oxides Under Laser Irradiation During Raman Analyses: II. Layer Structures

Journal of Raman Spectroscopy, Volume 56, Issue 10, Page 1072-1088, October 2025.
Manganese oxides are important geomaterials with diverse technological applications. Here, we investigate the behaviour of the most common Mn oxides with layer structures under irradiation by a 532‐nm laser, with intensity ranging from 23 µW/µm2 to 36.8 mW/µm2.
Simone Bernardini, Giancarlo Della Ventura, Luigi Jovane, Armida Sodo, Boriana Mihailova   +4 more
wiley   +1 more source

Advancing Nitrate‐to‐Ammonia Electrocatalysis: Strategies in Catalyst Design, Electrolyte Engineering, and Performance Evaluation

Advanced Science, Volume 12, Issue 34, September 11, 2025.
This review highlights the latest advances in electrocatalytic nitrate reduction to ammonia, with a focus on catalyst design strategies, electrolyte engineering, and performance evaluation. Abstract The electrochemical reduction of nitrate for ammonia production not only offers a promising alternative to the traditional Haber–Bosch process, which ...
Juan Bai, Ziyou Dong, Xudong Jiang, Qianqin Zhou, Jiahao Zhao, Jun Mei, Ziqing Tan, Ting Liao, Ziqi Sun   +8 more
wiley   +1 more source