Articles tagged with Oceans
A low-cost sensor disguised as a sea turtle egg can predict nest hatching time almost to the day. The TurtleSense system monitors nests remotely and detects synchronized developmental movement in real-time, enabling better decision-making for conservationists.
A new method for wind profiling using small drones has been tested and validated, enabling reliable wind speed measurements. The approach uses thermal anemometers, which are ideal for sUAVs due to their lightweight and inexpensive nature.
Researchers have made a detailed study of the oldest map of the Coatzacoalcos river, showing its feasibility as a corridor between Atlantic and Pacific oceans. The Isthmus of Tehuantepec was used to shorten the journey by two-thirds along the river and one-third overland.
A new study evaluated the performance of a Seabin device in Plymouth, UK, finding it captured only 0.18kg of litter over 750 hours of operation. In contrast, manual trawls collected significantly more litter with minimal harm to marine life.
A recent study by researchers at MARUM and ICBM found that plankton communities have migrated to higher latitudes since the last ice age, leading to the formation of new species assemblages. These changes occurred even after ocean temperatures stabilized, suggesting a non-uniform response to global warming.
A recent study by the University of Plymouth and international partners reveals that rapid sea temperature drops of up to 10 degrees were a primary cause of a devastating coral die-off event in Costa Rica's Eastern Tropical Pacific. The research highlights the importance of considering upwellings when managing reef systems, and propose...
Researchers studied heat movement near North Pole and under Arctic sea ice, providing insights into the mechanisms of Arctic sea ice decline. Their findings suggest that strong winds cause mixing of water where ice and ocean meet, leading to enhanced heat transfer and changes in seawater salinity.
Researchers from Tokyo University of Science develop a method to determine the number of samples required for accurate assessment of microplastic contamination in urban rivers. The study found that at high MP concentrations, two replicate samples are sufficient to measure MP concentrations accurately.
A new species of Bathynomus, a type of deep-sea isopod, has been discovered in the Gulf of Mexico. The new species, B. yucatanensis, is around 26cm long and has unique features such as slender body proportions and longer antennae.
Researchers at Nagoya University used satellite data to track ionospheric disturbances after the 2022 Tonga underwater eruption, detecting earlier signs of tsunami waves. The team found that electromagnetic waves traveled 1000 km/s, much faster than air pressure waves, allowing for potentially quicker tsunami warnings.
Save Our Seas Foundation joins Wildscreen Festival as a Principal Sponsor, focusing on marine conservation and storytelling. The partnership will promote impactful storytelling through the Panda Awards' new 'Impact' category.
A new study found that noise from one mine alone could travel approximately 500 kilometers in gentle weather conditions, with cumulative impacts likely in areas with multiple mines. The deep sea is home to organisms found nowhere else on Earth, and mining activities could have untold impacts on these species.
The construction of dams and changes in land use have significantly impacted the amount of sediment rivers carry to oceans. Sediment transport has decreased by 49% globally due to dam construction, while increasing on 36% of rivers in the south, primarily driven by deforestation.
A new UBC study finds that southern resident killer whales have been in an energy deficit for six of the last 40 years, with three recent years (2018-2020) being particularly dire. The researchers attribute this decline to lower Chinook salmon abundance and size, which are the primary food source for these whales.
Fossilized specimens of Vampyronassa rhodanica, an ancient cephalopod related to octopus and squid, display robust suckers for active hunting. The species is thought to have used these suckers to create a watertight seal and manipulate prey.
Climate scientists argue that climate actions need to be established at multiple time scales, with a focus on slow emerging changes such as deep ocean warming and sea-level rise. This requires the development of a system of scientific ocean monitoring with a time-scale in mind, considering risks like abrupt slowdowns of ocean circulation.
A new study reveals that Manx shearwaters use dynamic soaring to harvest wind energy and travel efficiently across the ocean. The birds' ability to adapt their flight patterns to optimize energy gain suggests a potentially game-changing strategy for drones and other aerial vehicles.
A team of University of Hawaii researchers found that the number of hours of darkness during the lunar cycle triggers mature Hawaiian box jellyfish to swim to shore to spawn. The study also revealed that jellies are likely to come from the lee of Diamond Head Crater, where they benefit from shelter and food.
New research shows that motorboat noise disrupts parental behaviors in coral reef fish, but reducing noise levels improves breeding success. On quieter reefs, 65% of nests contained offspring, compared to 40% on busy reefs. The study suggests that acoustic sanctuaries can help build resilience on coral reefs.
Researchers found that baby leatherback hatchlings are less sensitive to light than loggerheads, leading to circling behavior and delayed ocean entry. This difference may be an adaptation for detecting prey or habitats in the open ocean.
Researchers at Universities of Cologne and Bayreuth found that flooding frequency and topography determine the abundance of microplastics in an alluvial Rhine soil. The study, published in Science of the Total Environment, revealed that microplastics can accumulate in floodplains and be transported into deeper soil layers.
Researchers found that Mars' extreme energy budget imbalance can contribute to dust storms. The team analyzed four years of data from NASA missions and found a correlation between the planet's orbits and temperatures, suggesting that the energy excess may be one of the generating mechanisms of Mars' dust storms.
Researchers found that maintaining hard water reduces zinc accumulation and oxidative stress in goldfish, mitigating toxic effects. This study provides an eco-friendly approach to address aquatic ecosystem pollution caused by heavy metal contamination.
The world's ocean is losing its year-to-year memory due to global warming, making it harder to predict ocean conditions. This decline in ocean memory will have significant impacts on fisheries management, population estimates, and land-based weather forecasts.
Researchers at University of Exeter discovered engravings in Tanzania's Zanzibar archipelago made by soldiers on guard duty, revealing ships that sailed on the western Indian Ocean during the 19th century. The graffiti depict various vessel types, including European-style frigates and settee-rigged ocean-going vessels, providing valuab...
A scientific expedition led by the Smithsonian Tropical Research Institute aims to explore and document the biodiversity of Panama's Cordillera de Coiba seamounts. The mission, funded by several organizations, will use advanced technology to study the important habitats in the area.
A new study reveals that freshwater habitats have the highest animal species richness per area, with more than 99% of known animal species inhabiting land and 12% ocean habitats. The research suggests that preserving freshwater ecosystems can protect more species and evolutionary history.
A Rutgers study found that climate change will alter predator-prey interactions, preventing species from adapting to changing conditions. This will lead to a decline in commercially important fisheries and a shift in the abundance of species in their new geographic ranges.
Researchers recommend organizing targeted culls and creating a supply chain to make lionfish a component of the region's fishing industry. They also call for legal changes to permit lionfish removals across the Mediterranean and inclusion on the EU list of invasive species of concern.
The Florida horse conch population is shrinking due to unregulated commercial harvesting and recreational live collection. With an average lifespan of 8-10 years, the species can only reproduce at age six, resulting in limited offspring production.
A recent study reveals alarming levels of plastic pollution in the Arctic Ocean, affecting ecosystems and potentially exacerbating climate change. Plastic debris from rivers, air, and shipping has reached all spheres of the Arctic, including the seafloor, remote beaches, and even ice and snow.
Researchers quantified five critical ecological processes on over 500 coral reefs worldwide, finding no reef can maximize each process simultaneously. They also identified local super heroes among species that contribute to ecosystem functioning.
A new study by University of Washington researchers explains why Antarctic sea ice retreats quickly during the summer months, finding that it follows simple rules of physics. The seasonal cycle is consistent, showing a fast retreat relative to slow growth.
Recent studies show that CMIP6 models better simulate the spatial distribution of sea surface salinity and freshwater flux variability associated with ENSO. However, some models still have large uncertainties in simulating interannual variations, requiring further improvement in related physical processes.
A new study suggests that the majority of ocean plastics are on the seafloor or difficult to monitor, with an estimated 540 million metric tons trapped on land. The research estimates that large plastics and microplastics account for only a small percentage of total ocean plastic waste.
A study published in eLife reveals that trade-offs between growth and survival enable marine microbes with different dispersal strategies to coexist on small particles in the ocean. The findings help explain the diversity of bacteria and microbes in oceans, shedding light on the factors supporting their existence.
The University of Plymouth is collaborating with Kongsberg Digital to develop a state-of-the-art simulator that will revolutionize the floating offshore wind sector. The new system will provide key insights into solutions increasing efficiency, safety, and cost effectiveness for industry professionals.
Scientists propose a new mechanism by which oxygen accumulated in the atmosphere, shifting the planet out of its low-oxygen equilibrium. Interactions between certain marine microbes and minerals in ocean sediments may have prevented oxygen consumption, setting off a self-amplifying process.
Researchers used a novel approach to understand the effects of human activity on the planet, introducing three parameters: delay time, memory, and persistence. They found that the atmosphere, land, and ocean system is fragile and could be forced outside its natural regime before 2050 if emissions continue as usual.
A 22-month study found that Hawaiian coral species experienced significant mortality, but some thrived under conditions simulating future ocean temperatures and acidity. The research provides hope for the future of corals, with certain species, like Porites, showing remarkable resilience.
A new analysis reveals Caribbean coral reefs have warmed by 0.5 to 1°C in the past century, with projected further warming of 1.5°C by 2100. Marine heatwaves are also increasing in frequency and length, posing a significant threat to these ecosystems.
A recent study reveals that Megalodon's body size was influenced by water temperature, with individuals growing larger in cooler waters. The research suggests that Bergmann's rule may have played a role in the shark's gigantism.
Researchers used submersibles to explore deep reefs, increasing the recorded number of deep-reef fishes by 9-fold. The study found that reef-fish faunas extend below the mesophotic zone and revealed a previously unknown reef ocean zone, the rariphotic.
Researchers analyzed 280 confirmed sea turtle entanglements in Massachusetts waters and found that quickly reporting incidents can improve survival rates. The study highlights the importance of complete disentanglement to minimize injury and promote survival, with many turtles being alive weeks to years after being disentangled.
A new UNSW-led study reveals that global warming has amplified the water cycle, with an estimated 46,000-77,000 cubic kilometers of freshwater transported from the equator to the poles since 1970. This finding suggests broader changes to the global water cycle and highlights the need for improved climate models.
A team of researchers found that many marine phytoplankton are voracious predators, consuming bacteria like Prochlorococcus and other primary production. This discovery reveals the complexity of ocean ecosystems and challenges traditional views of phytoplankton as solely photosynthetic organisms.
Researchers developed novel bioplastics using lysine-rich proteins, offering improved durability, biocompatibility, and biodegradability. The bioplastics can be produced without toxic chemicals or complex processing steps, making them a promising alternative for packaging, toys, and other applications.
Researchers have discovered two new and unusual species of diatoms that fix nitrogen, a critical process supporting productivity in nutrient-poor open ocean waters. These diatoms harbor symbiotic cyanobacteria that convert dissolved nitrogen gas into ammonia, enabling them to thrive in nutrient-poor conditions.
Researchers at University of Maryland Center for Environmental Science found that marine snow particles help remove carbon dioxide from the atmosphere, contributing to a more efficient carbon cycle. The discovery sheds light on how oxygen deficient zones play a crucial role in the Earth's carbon cycle.
Researchers have developed a method to detect tiny plastic scraps on remote beaches using satellite technology. This innovation enables the tracking of plastics within satellite images, allowing for more frequent and reliable observations.
Researchers from McGill University found that oxygen levels rose with complex eukaryotic ecosystems, indicating low oxygen was a significant limitation on evolution for billions of years. The discovery has implications for searching for biosignatures in other planets, focusing on ozone detection.
Researchers detected 43 trillion miniature plastic particles in Switzerland every year, with estimates suggesting up to 3,000 tonnes of nanoplastics covering the country annually. The study reveals that nanoplastics originate primarily from urban areas and global emissions, posing potential health risks when inhaled.
Researchers found that dynamic ocean management is more effective in reducing accidental catch than permanent marine protected areas. Dynamic closures track real-time data and close smaller areas as species hotspots shift, resulting in up to 57% reduction in bycatch.
A study by Kyoto University found that migratory shrimp significantly enriched streams with nutrients, outperforming aquatic insects. The research highlights the crucial role of these small crustaceans in maintaining ecosystem balance and suggests integrating landscape management to support nutrient cycling.
Researchers from Korea Maritime & Ocean University found that using LPG as a marine fuel can reduce annual fuel consumption by 7.5-10.4%, fuel cost by 8.8-25.9%, and carbon dioxide emissions by 10-14%. The study also highlights the potential for promoting LPG as an eco-friendly alternative to traditional fuels.
The frequency of thunderstorms in some fast-growing African coastal cities has doubled over the past 30 years, mostly linked to land use change. Deforestation exacerbates storm activity, causing increased rainfall and flooding in urban areas.
Oceanographers replaced ship-based studies with sensors attached to seals to navigate icy waters, revealing seasonally varying water flows and their impact on biological production. The study found that warm, low-salinity water appears during autumn, positively affecting seal foraging behavior and potentially enhancing prey availability.
Scientists used biologging tech to track three seabird species taking different migration routes from a shared Canadian Arctic nesting location. The study adds evidence linking marine biodiversity in the Arctic region to high seas conservation efforts. Local coastal communities are connected through these Arctic seabirds' migrations.
A new UC Riverside-led study reveals that tiny microbes belching toxic gas helped cause and prolong the biggest mass extinction in Earth's history. The heat accelerated microbes' metabolisms, creating a deadly cycle of hydrogen sulfide production.
A new global atlas reveals that up to 1.9 million km2 of the world's coastal waters are affected by artificial light at night, with significant impacts on marine organisms. The study uses a novel metric to determine the depth of light penetration and highlights the need for further research into the effects of ALAN pollution.