Articles tagged with Sea Floor
Research reveals European flat oysters formed large reefs of living and dead shells, supporting rich biodiversity and stabilizing shorelines. Historical records show that these reefs existed along Europe's coasts from Norway to the Mediterranean, but were destroyed over a century ago due to overfishing.
Researchers have discovered large underwater ice formations at the edge of the Canadian Beaufort Sea, revealing an unanticipated mechanism for submarine permafrost ice formation. The newly formed ice is created by melting ancient permafrost and refreezing as brackish groundwater approaches the seafloor.
Researchers discovered a mysterious subduction zone deep beneath the Pacific Ocean, reshaping our understanding of Earth's interior structure. The team found an unusually thick area in the mantle transition zone, suggesting the presence of colder material that slows down oceanic slabs as they sink through the mantle.
Researchers discovered that sea robins' legs are covered in sensory papillae with taste receptors, allowing them to detect and uncover food. The findings reveal an ancient gene controlling leg development and sensory organ formation, shedding light on the evolution of complex traits in wild organisms.
Researchers found inorganic nanostructures surrounding deep-ocean hydrothermal vents that mimic molecules essential for life. These structures can harness energy and convert it into electricity, sparking interest in applying this technology to industrial blue-energy harvesting.
The study found a recent reversal of fortunes in the Adriatic Sea, with populations of marine predators and their prey plummeting and being replaced by a single species. The researchers used seafloor environments to determine interactions between species, showing a decline in biodiversity and excess nutrients.
Researchers at Boston University discovered that deep-sea rocks, called polymetallic nodules, produce oxygen through a process known as seawater electrolysis. This phenomenon creates 'dark oxygen' without sunlight, contradicting the long-held assumption that oxygen is only produced by plants and organisms with photosynthetic capabilities.
Researchers mapped a giant underwater avalanche that grew 100 times in size, eroding a 400km canyon and traveling 2000km across the Atlantic Ocean seafloor. The event was so powerful it carried boulders over 130m up the side of the canyon.
The study reveals that iron-bound organic carbon is remobilized during microbial-mediated iron reduction processes in the sulfate-methane transition zone, supporting microbial life. A stable proportion of total organic carbon survives degradation and is stored in marine sediments over geological time periods.
A UK-based study reveals that an offshore mussel farm is reviving shellfish reefs off the English south coast, a process previously unseen in 150 years. The research found mussels deposited on the seabed create habitats for commercially important species like European lobsters and brown crabs.
Scientists equipped Australian sea lions with cameras and analyzed the footage to identify six benthic habitats in southern Australia. The study used machine learning models to predict large habitat areas across the continental shelf, contributing to a better understanding of the region's seabed diversity.
Researchers from MARUM and the National Oceanography Centre analyzed sensor data over four years to determine seafloor currents in deep waters. The study found that currents sped up, slowed down, reversed direction, and were steered by seafloor relief, contradicting previous steady models.
The UT Austin expedition aims to investigate how sediments control glacial melt and the future of the Greenland ice sheet. A robotic submersible will gather measurements of the glaciers' underwater walls and sediment-laden meltwater, while surveys and sediment cores will reveal past climate change impacts.
A study by the University of Essex found that oil and gas extraction can cause a nearly 30% decline in species richness near platforms, with pollutants like hydrocarbons up to 10,613% higher within 500m. This has a direct impact on marine invertebrates and food webs.
Researchers analyzed rocks collected from seafloor, finding they date back to at least 2.5 billion years ago and have retained a stable oxidation state since then. The discovery provides new evidence on Earth's geologic history and sheds light on the planet's evolution.
A new study reveals that metallic minerals on the deep-ocean floor can produce oxygen, even in complete darkness. This discovery challenges long-held assumptions that only photosynthetic organisms generate Earth's oxygen and has significant implications for our understanding of the origin of life.
Researchers have created a cost-effective and efficient method to test seabed soil when designing offshore wind farms. The new device, based on a modified speargun, can penetrate sandy seabeds more effectively than existing probes, offering significant time and cost savings.
A new study reveals the Jøtul hydrothermal field in the Arctic Ocean, which is rich in minerals and metals. The discovery of high concentrations of methane indicates a significant interaction with magma, contributing to ocean acidification and climate change.
Researchers used stable oxygen isotope Delta-O-18 to analyze ITCZ changes over 30,000 years. The study identifies main components for ITCZ size, strength, and position influenced by Earth's axis inclination and orbit eccentricity.
Deep-sea organisms have developed biophysical adaptations to survive harsh conditions, including unique lipid structures. Researchers found that ctenophores have exaggerated cone-shaped lipids that help them withstand intense pressure.
A new study by UC Santa Cruz researchers uses computer simulations to explore the possibility of life-supporting conditions on ocean worlds. The research found that lower-temperature hydrothermal vents could be sustained under a wide range of conditions, increasing the chances of life existing on these celestial bodies.
A recent study improves earthquake and tsunami hazard assessment by revealing the Cascadia Subduction Zone's complex geometry. The zone is divided into four segments, each potentially insulated against movements, and has a megathrust fault that can trigger massive earthquakes and tsunamis.
A new study reveals that the shape and depth of ocean floors significantly influence carbon sequestration, with bathymetry accounting for up to 50% of changes over 80 million years. This understanding can inform marine-based carbon dioxide removal technologies and aid in searching for habitable planets.
Researchers used AI to analyze global datasets and environmental conditions, discovering a complex interplay of factors influencing seafloor bioturbation and ecosystem services. This study expands knowledge on ocean health and climate change responses.
A Texas A&M-led team has created the first global map of seafloor biodiversity activity, uncovering key environmental factors that drive burrowing animals' activities and ecosystem health. The research highlights the critical role these animals play in regulating carbon, nutrient, and biogeochemical cycles.
The study identified two main reasons for the amplification of tsunamis: a lens effect due to shallow waters and wave refraction, as well as diffraction at capes and multiple reflections. These local conditions contributed to the high tsunamis in Iida Bay.
Researchers found that anglerfish's unique sexual parasitism helped them adapt to the deep sea during a time of global warming. This trait allowed for successful reproduction and diversification in the 'midnight' zone.
Researchers found that microbial communities can stimulate decomposition of both fresh and old organic matter, with significant implications for the marine carbon cycle. The study suggests that increased input of fresh organic matter due to climate change could lead to a disproportionate effect on degradation of refractory organic matter.
Research reveals that powerful sediment flows, not methane gas eruptions, maintain prehistoric seafloor pockmarks off the California coast. Sediment gravity flows have caused erosion in the center of each pockmark, maintaining these unique underwater morphologic features over time.
Researchers have identified heavily used shipping lanes that pass through crucial whale shark feeding grounds, posing a threat to this endangered species. Targeted measures, such as reducing ship speed, could help minimize the impact on the shipping industry while protecting whale sharks.
New research reveals human activities alter marine organism preservation, improving or impairing the fossil record. Human actions can prevent useful information about ongoing changes and enhance the quality of the fossil record.
A new study published in Nature Sustainability suggests that decommissioned offshore structures may only provide limited long-term ecological benefits. The research analyzed over 530 scientific studies on the effects of marine artificial structures and found no conclusive evidence to support their use as artificial reefs.
Researchers developed a novel machine learning-based depth estimation technique for satellite-derived bathymetry, improving accuracy in coastal regions with unique characteristics. The model demonstrated generalizability and potential for enhancements through incorporation of additional seabed spatial data.
A recent study found that microbial communities thrive on inactive hydrothermal vent smokers, producing organic carbon and fixing CO2. These ecosystems are crucial for understanding the deep-sea carbon cycle and its interactions with the environment.
A recent study by researchers at the University of Southern Denmark found that the Arctic Ocean's declining sea ice cover has complex effects on marine ecosystems and ocean productivity. Despite increased sunlight availability, primary production on the seafloor has not seen a corresponding increase, suggesting water transparency may b...
Researchers developed a real-time acoustic positioning method to improve ocean bottom seismic exploration accuracy. The approach groups observations to construct precise models, achieving decimeter-level accuracy and potentially centimeter-level precision.
Researchers have discovered large undersea faults on the Pacific Ocean floor that are pulling the Pacific Plate apart. The newly found faults, some thousands of meters deep and hundreds of kilometers long, are weakening the plate due to immense forces within it.
Researchers from Kobe University found that a 7,300-year-old volcanic eruption was the largest of the Holocene era. The team analyzed seismic imaging and sediment samples to determine the event's magnitude and impact on the climate.
Researchers found that the bacterial community in Arctic seabed sediments remains stable throughout the seasons, with changes in gene expression of carbohydrate-degrading enzymes. This suggests that bacteria can utilize fresh material from the water column as well as stored compounds in the seabed.
Researchers at the University of São Paulo found evidence of a tropical island with rich mineral deposits, including cobalt and nickel, in the South Atlantic Ocean. The team's analysis of seafloor sediment samples suggests the area was once home to vegetation and had volcanic activity between 30-40 million years ago.
Scientists have found that deposits deep under the ocean floor reveal a way to measure ocean oxygen levels and their connections with carbon dioxide during the last ice age. This study could improve predictions of how oceans will respond to global warming.
A landmark study by National Geographic Pristine Seas finds that bottom trawling releases up to 370 million metric tons of carbon dioxide into the atmosphere annually. The research also reveals high carbon emissions in areas such as East China Sea, Baltic, and North Seas.
Researchers at Kiel University discovered that porpoises and sand eels create shallow pits in the North Sea seafloor when hunting for buried sand eels. The findings have significant global implications, suggesting that scouring of sediments by vertebrates could modulate the seafloor on a global scale.
Researchers used a fiber optic cable to study the Arctic seafloor's seismic structure and temperature. They identified areas with large amounts of ice and detected changes in temperature over seasons, which will help understand global climate change.
Researchers at Newcastle University found that climate change can cause frozen methane to melt and release methane into the sea. This process, known as hydrate dissociation, has significant implications for predicting and addressing the impact of methane on our changing climate.
Scientists discovered that the Sahara Desert was greener during the time of Homo erectus' migration, allowing for a more hospitable passage. This discovery sheds new light on how early humans adapted to their environment.
New data analysis reveals that regional temperature patterns are crucial for evaluating climate models, with warmer temperatures in the North Atlantic and a cooler North Atlantic found to be more accurate. This approach provides better insights into the spatial impact of climate change and its effects on ecosystems and human societies.
A new bacterial species, Hydrogenimonas cancrithermarum, discovered at a deep-sea hydrothermal vent site provides insights into bacterial evolution. The strain represents the first mesophilic sulfur-oxidizing bacterium in its genus, expanding physiological and metabolic characteristics.
Scientists tracking Cadman Glacier's rapid retreat highlight the importance of long-term monitoring of Antarctica's polar regions. The glacier's ice shelf thinned due to warmer ocean waters, leading to a 28% increase in ice discharge over 13 months.
A new study reveals that shipwrecks are providing a sanctuary for fish, corals, and other marine species in areas open to destructive bottom towed fishing. Marine life density is significantly higher within wreck sites than in control areas.
Researchers uncover 10 new trilobite species in Thai sanctuary, shedding light on Cambrian-Ordovician period and connecting Thailand to parts of Australia. The discovery helps date the age of fossils and better understand global geography.
A study by Universitat Autonoma de Barcelona found that all aquatic species in river mouths are contaminated with microplastics. Molluscs were the most affected, and nanoplastics posed a greater risk to aquatic organisms due to their ability to pass through cellular membranes.
Researchers from Ohio State University studied a past underwater landslide and developed a novel approach to analyze the risk of deadly tsunamis. They found that slide velocity may help determine the threat of dangerous waves, and their findings could improve our understanding of submarine landslides and tsunamigenic events.
Researchers used a well-tested climate model to depict changes in natural climate variability during the last peak glacial period. The study found that internal mechanisms, such as variations in salinity and temperature, drove the multi-centennial climate variability, resulting in fluctuations in sea ice extent and Greenland temperatures.
A new study found that high-pressure conditions in deep-sea environments preserve organic matter and nutrients, supporting a vast array of microorganisms. Researchers simulated these conditions using pressure tanks, demonstrating the importance of this process in maintaining life at extreme depths.
GEOMAR researchers used 3D seismics to recreate the 1650 Kolumbo volcano eruption, finding that a landslide followed by an explosion created the devastating tsunami. The study provides valuable insights for monitoring submarine volcanic activity and potentially developing early warning systems.
Researchers from the University of Plymouth discovered coral reef bleaching at depths previously thought to be resilient, highlighting the vulnerability of mesophotic coral ecosystems to thermal stress. The study suggests that climate change is causing a deepening of the thermocline, leading to increased bleaching in the deeper ocean.
Researchers at Kyoto University have found three new species of animals living together in harmony with worms in dead coral rocks. The discovery highlights the importance of community structure and biodiversity patterns in cryptofauna, suggesting that symbiotic relationships are omnipresent in the ocean.
Scientists have found evidence of past oxygen loss in the world's oceans during glacial periods, indicating that current climate change may not be permanent. The discovery was made by analyzing seafloor sediments from the past 145,000 years, which showed a build-up of cobalt during the last ice age.
The expedition aims to study the geological system and evolution of hydrothermal ecosystems in the Red Sea. The team will use modern seafloor observation systems and instruments like the ROV Kiel 6000 to locate and map hydrothermal habitats.