Results 81 to 90 of about 1,817,988 (202)

Morphological and Morphometric Characterisation of Selected Camarodont Sea Urchin (Echinoidea: Camarodonta) Pedicellariae (Paracentrotus lividus, Psammechinus miliaris and Echinus esculentus)

Acta Zoologica, EarlyView.
ABSTRACT Pedicellariae are small appendages on the surface of the echinoid test, involved in defence, cleaning, and locomotion. Pedicellariae in three species of camarodont sea urchins common in UK waters (Paracentrotus lividus [Lamarck, 1816], Psammechinus miliaris [P.L.S Müller, 1771] and Echinus esculentus [Linnaeus, 1758]) are the focus of this ...
H. C. Reinardy, R. Marton, C. Allen, E. Mitchell, L. Brunner, A. D. Hughes, R. A. Jenner   +6 more
wiley   +1 more source

Biogeochemical, sedimentological and dinoflagellate‐based reconstruction of the Holocene palaeoenvironment of the east Limfjord, Denmark

Boreas, EarlyView.
To assess how the eastern part of the Limfjord system has changed over the Holocene, relative to the wider Limfjord and western Baltic region, a sedimentary succession spanning c. 9600–150 cal. a BP was collected from Nibe Bredning, near Sebbersund, from a shallow coastal inlet along the eastern connection between the Limfjord and the Kattegat (north ...
Gabriella M. Weiss, Jonathan P. Lewis, Paula J. Reimer, David B. Ryves, Peter Rasmussen, Jesper Olsen   +5 more
wiley   +1 more source

MST-Net: A Seabed Sediment Classification Framework Based on a Multiscale Fusion and Transformer Model Using Airborne LiDAR Bathymetry Data and WorldView-2 Images

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Seabed sediment data can reflect the sedimentary and ecological features of a seabed and are highly important for scientific research and applications, such as marine engineering construction, ecological protection, and resource exploration.
Wenxue Xu, Yingjie Ren, Yadong Guo, Yanxiong Liu, Xue Ji, Qiuhua Tang, Jingyu Zhang, Yikai Feng   +7 more
doaj   +1 more source

Rapid Communication / Communication Rapide

, 2007
Huge amounts of money will be spent by industrialized nations during the next decades to obtain detailed maps of continental shelf seabeds. These maps, which will allow a more rational exploitation of the sea floor, are needed to assess the impact of ...
Acoustic Seabed Classification, Pierre Legendre   +1 more
core  

Truncated drumlins and their implication for past sea level reconstructions

Boreas, EarlyView.
Coastal erosion of glacigenic sediments, particularly in the form of retreating drumlin bluffs, is a key process in paraglacial landscape evolution during periods of relative sea‐level (RSL) rise. As marine transgression reworks formerly subaerial glacial terrains, drumlins act as discrete sediment sources generating characteristic erosional and ...
Riccardo Arosio, Andrew Finlayson, Guillaume Michel, Dayton Dove   +3 more
wiley   +1 more source

Assessing the effectiveness of Sri Lankan marine protected areas: Challenges and recommendations

Conservation Science and Practice, EarlyView.
We evaluated the biodiversity conservation effectiveness of 32 zones of Sri Lankan marine protected areas (MPA) and found that most are currently insufficiently protected. Threats to MPAs were not uniform, with harmful dredging/dumping, anchoring, fishing, and non‐extractive activities identified as major pressures affecting different sets of MPAs.
Barbora Winterová, Chanaka Sooriyabandara, Jeffrey C. Nekola, Terney Pradeep Kumara   +3 more
wiley   +1 more source

High Strength Steel Fatigue Crack Growth Database for Offshore Renewable Energy Applications

Fatigue &Fracture of Engineering Materials &Structures, EarlyView.
ABSTRACT High strength steels can reduce costs and carbon emissions in offshore renewable energy, but their effect on structural integrity remains unclear. In welded structures, such as support structures for offshore wind and tidal turbines, fatigue life is dominated by crack growth from flaws at weld toes.
Machar Devine, Moray Stiven, Madison Asbury, Ali Mehmanparast   +3 more
wiley   +1 more source

Physics-Guided Random Forest Classification of Marine Sediments Using Frequency-Dependent Acoustic Reflection Spectra

Applied Sciences
Traditional acoustic seabed classification methods, which are often sensitive to survey geometry and environmental conditions, have limitations in reliability and reproducibility.
Moshe Greenberg, Vladimir Frid
doaj   +1 more source

Under the cover of darkness: Foraging behaviour increases on cloudy, new moon nights in a pelagic seabird

Ibis, EarlyView.
While many visual predators feed exclusively during the day, others exploit foraging opportunities at night, although the efficiency with which they do so is strongly influenced by ambient light levels. We investigated the influence of variation in nocturnal light on the foraging behaviour of a small pelagic seabird, the European Storm‐petrel ...
Darren Wilkinson, Adam Kane, Mark Jessopp, John L. Quinn   +3 more
wiley   +1 more source

Evolution, Routing and Reservoir Characteristics of Submarine Channels in a Structurally Deforming Slope Setting: Deep‐Water Joint Development Zone of Nigeria and São Tomé and Príncipe

Journal of Petroleum Geology, EarlyView.
ABSTRACT Deep‐water slope channels and associated facies are a major part of clastic sediment dispersal system extending from the shelf‐edge to the abyssal plain. The toe‐thrust area of the deep‐water Niger Delta enables the analysis of these channels and their interaction with evolving fault‐controlled sea‐floor topography to be determined ...
Stanley Ang, Mike Mayall, Lidia Lonergan
wiley   +1 more source