Articles tagged with Marine Biology
Marine darkwaves are short-term episodes of underwater darkness that can severely impact kelp forests, seagrass beds, and other light-dependent marine life. The researchers developed a framework to compare these events across the globe, finding between 25-80 marine darkwaves along the East Cape since 2002.
Researchers identified genes controlling the switch between unicellular and multicellular life forms in marine yeast, revealing a molecular mechanism for clonal multicellularity. The study provides insights into how multicellular life may have evolved from single-celled ancestors.
A new study reveals that giant clam populations in American Sāmoa are stable and abundant due to traditional community-based resource management. Village-managed closures outperform federally protected no-take areas, highlighting the effectiveness of cultural stewardship.
Researchers discovered that SAR11 marine bacteria are organized into stable, ecologically distinct groups, adapted to specific environments such as coastal and open ocean. These findings provide new insights into the global ocean's life-support system and climate reactions to threats like pollution and ocean warming.
Researchers at the University of Zurich examined fossil records worldwide and found a consistent pattern: young shark species are more likely to go extinct. This challenges the long-held assumption that older species are less vulnerable to extinction.
A new study reveals that seasonal seabird nesting concentrates tiger sharks in specific areas, forcing other species to shift their habitat use to avoid predation. The presence of fledgling seabirds influences the behavior of apex predators, including gray reef and Galapagos sharks.
A team of researchers from Yokohama National University has discovered a previously unknown species of marine fungus that can kill harmful, bloom-forming algae. The new species, Algophthora mediterranea, was found to be a destructive parasite in a species of algae known to cause toxic blooms with adverse health effects on humans.
A Harvard-designed bio-logger captures high-fidelity audio of sperm whale codas, which are later analyzed by machine learning models to uncover structured communication. Recent results show that sperm whales have their own alphabet and use vowels and diphthongs in their language.
A study found that a global pandemic is quietly wiping out sea urchins around the world, with populations nearing local extinction in the Canary Islands. The 2022-2023 mass mortality event affected the entire population of the species across the archipelago, causing a 74% decrease in La Palma and a 99.7% decrease in Tenerife.
A new USF study found that tour boats and swimmers routinely violate Mexico's whale shark tourism rules, even when waters are less crowded. The research, based on drone footage from 2016 and 2022, suggests that the world's busiest whale-shark destination is struggling to manage demand, putting vulnerable animals at risk.
A new study by the University of Oxford and WCS reveals that connections between coral reefs can stabilize reef health, reducing the risk of collapse. By simulating future reef conditions under different management scenarios, researchers found that a dual approach improving land and sea conditions provides the best outcomes for reefs.
Researchers analyzed dolphin vocalizations during enrichment activities at Oltremare Marine Park in Italy. The study found that dolphins 'speak' more during structured moments like training, feeding, or play, revealing their social and emotional engagement.
A global survey found that nearly 66% of shark descriptors were neutral, suggesting a shift away from the menacing predator narrative. Researchers used automated statistical packages and manual approaches to analyze short descriptions of sharks, revealing positive words like 'majestic' and 'fascinating'.
Researchers at UMass Amherst found that reducing air exposure, fight times, water temperatures, and increasing angler education are crucial for a sustainable fishery. The team's study revealed that longer fights and higher water temps increase recovery time and stress on striped bass.
A new order of marine sponges, Vilesida, has been discovered, producing unique sterols that support the hypothesis that animals evolved 100 million years earlier than previously thought. These compounds may also be used in the development of new antimicrobial and anticarcinogenic drugs.
Researchers from UCSB have challenged the prevailing view of how carbon is fixed in the ocean's sunless depths. They found that microbes beyond autotrophic archaea and heterotrophs could be responsible for fixing carbon dioxide, providing a new understanding of deep-ocean food web dynamics.
Studies in the Tropical Eastern Pacific indicate that sharks thrive in oceanic islands' MPAs, unlike coastal areas where predatory fish are depleted. The research highlights the importance of these refuges for shark conservation.
A study published in iScience has decoded the vampire squid genome, revealing that modern octopuses evolved from squid-like ancestors with a conserved chromosomal architecture. The researchers found that the vampire squid retains key genomic features with squids and cuttlefish, occupying an intermediate position between these lineages.
A new resource has been developed to help kelp farmers in Maine reduce their production costs. The tool provides detailed economic analyses and identifies strategies for sustainable business plans. By using this tool, kelp farmers can achieve economic sustainability and improve their bottom line.
By 2100, coral reefs will be slow to recover, less complex, and dominated by fleshy algae as a result of high carbon dioxide changes in ocean chemistry. The study uses unique coral reefs in Papua New Guinea to determine the impact of ocean acidification on coral reefs.
Two Virginia high school students found that sea anemones experience stress due to hyposalinity caused by hurricane rainfall. They also discovered a threshold of 20 parts per thousand where protective mechanisms fail, highlighting the need for conservation strategies.
A new study found that Critically Endangered African penguins are more likely to forage in areas with commercial fishing vessels during years of low fish abundance, increasing competition and pressure on the species. The research introduces a novel metric called
A meta-analysis of scientific literature reveals that pathogens are the primary driver of mass mortality events in sea urchins, with 33% of events attributed to them. Storms and extreme temperatures also play a significant role, with 25% and 24% of events respectively.
Researchers have recorded hundreds of narwhal interactions with moorings, suggesting that passive acoustic monitoring may not be as non-invasive as assumed. The study found that narwhals were attracted to the devices, possibly due to confusion with prey or curiosity.
The Art of Science competition celebrates creativity through photography and video, highlighting FAU's rise as a hub for innovation. Chelsea Bennice wins with her captivating underwater octopus image, while Gabriella Carvajal's 'Sea Turtle Beginning' showcases embryonic development, shedding light on climate change impacts.
A new study finds that deep-sea mining waste can disrupt marine life in the midwater 'twilight zone', where vast communities of zooplankton support the ocean's food system. The waste, released during a 2022 mining trial, has lower concentrations of amino acids, threatening the delicate balance of the food web.
Researchers analyzed sediment cores from three sites in the Arctic, finding that year-round ice coverage corresponded with less cosmic dust. This study suggests that tracking cosmic dust can help predict changes to sea ice coverage and understand warming trends.
A new species of Physalia jellyfish has been discovered in northeast Japan, prompting questions about the distribution and movement of marine organisms. The study suggests that warm ocean currents may be transporting surface-drifting marine organisms to previously unrecorded areas.
A remotely operated vehicle (ROV) in the Western Weddell Sea uncovered extensive maintained fish nesting grounds, revealing patterns and organization, which are thought to be a survival strategy. The discovery provides critical insights into Vulnerable Marine Ecosystems and their importance for biodiversity.
Researchers at Queensland University of Technology have discovered a three-step process in coral fragments attaching to reefs, involving an immune response, tissue anchoring, and skeleton building. The study reveals distinct biological differences between coral species influencing attachment efficiency and growth rates.
A new study reveals that different prey within a single species can provide vastly different levels of nutrition for marine predators. This variation can lead to predators consuming more prey than necessary, highlighting the importance of understanding prey quality in maintaining ecosystem balance.
A soft coral's ability to stiffen its skeleton in response to danger has been studied by Penn Engineers, revealing a mechanism known as granular jamming. By compacting mineral particles and expelling water, the coral's tissues create a rigid structure that can withstand external forces.
Researchers at the University of Technology Sydney discovered that tailored lipid supplements can significantly increase coral larvae's strength, speed, and survival rate. This innovation has major implications for reef restoration projects, which aim to improve larval supply but often face low post-settlement survival rates.
The study reveals that the Israeli Mediterranean Sea fosters extraordinary nutritional and health properties in seaweeds, with high protein content and antioxidant levels during winter and spring respectively. These findings highlight seaweed as a natural source of health-promoting compounds and potential therapeutic agents.
Researchers at Osaka Metropolitan University discovered that marine green algae possess a unique pigment called siphonein, which helps quench triplet states and protect photosynthesis from excessive light. This finding opens the door to developing bio-inspired solar technologies with built-in protective mechanisms.
A new international study reveals that nitrogen fixation occurs beneath Arctic sea ice, increasing available nitrogen for algae and potentially boosting marine life. This discovery could also impact carbon absorption in the Arctic Ocean.
Researchers at University of Hawaiʻi at Mānoa identified Caulobacter inopinatus, a previously unknown species found in seawater collected near Oʻahu's south shore. The discovery highlights the connection between land and sea ecosystems through microbial exchanges.
A Mediterranean coral species has been found to have a unique "dual feeding" strategy that allows it to survive and even thrive in rising sea temperatures. This flexibility involves the coral being able to feed itself with or without algae, making it more resilient to climate change.
Researchers describe 14 new marine invertebrate species and two genera from worldwide oceans, shedding light on deep-sea life. The study utilizes non-invasive micro-CT scanning to provide unprecedented clarity on internal tissues and soft-body parts.
Researchers developed solar-powered lights to reduce sea turtle entanglement in fishing nets. The LED lights are highly effective, with 63% lower bycatch rates compared to unlit control nets.
Researchers aim to fill the knowledge gap on Antarctic marine viruses, particularly RNA viruses, to understand their ecological importance. They highlight the need for further research on viral tagging, single-cell sequencing, and studying the marginal ice zone to expand our understanding of these viruses.
Coccolithophores are microscopic ocean organisms that regulate Earth's climate by drawing carbon out of seawater, producing oxygen, and creating chalk and limestone that preserve climate history. Climate change is altering their survival and the ecosystems they support, making International Coccolithophore Day a crucial awareness campa...
A study has found that high-latitude phytoplankton communities responded to a pre-PETM warming event, highlighting the importance of examining background intervals in determining ecosystem change. The results suggest even small environmental changes can have dramatic impacts on marine ecosystems.
A new study by Florida Atlantic University researchers found that heat does not significantly affect the cognitive ability of sea turtle hatchlings. However, higher incubation temperatures negatively impact their physical traits, including shorter incubation durations, lower hatching success, and more frequent scute anomalies. The stud...
A new species of the genus Leucothoe was identified on Sugashima Island, Japan. The discovery was associated with a specific type of limid bivalve, highlighting the unique biodiversity found in this region.
Researchers have discovered microplastics in the endangered Indus River dolphin, finding fibers and other particles in the GI tracts of all five stranded individuals. The study highlights the urgent need for conservation strategies to address this pollution issue.
Researchers discovered onnamides, a family of compounds from Okinawan marine sponges, showing remarkable potential against Leishmania major. These compounds demonstrate potency and safety exceeding current treatments, offering new approaches to overcome drug resistance.
Researchers tested a popular evolutionary theory by comparing maternal length and fetal sex in over 100,000 whales. They found that the fetal sex ratio skews female for longer body size, suggesting that female calves benefit more from heritable fitness than males do. The findings contradict the Trivers-Willard hypothesis.
A University of the Sunshine Coast researcher has documented the world's first recorded and scientifically observed three-way mating between two male and one female leopard sharks. The video provides valuable insights into the species' natural mating behavior and informs conservation strategies.
A new study by Boston University marine biologists reveals that heat waves are devastating the mutualistic relationship between clownfish and anemones in the Red Sea. The researchers found that prolonged bleaching caused a catastrophic breakdown in the system, resulting in a 94-100% die-off of clownfish and 66-94% die-off of anemones.
A study analyzing four decades of Italian cetacean strandings reveals that bottlenose and striped dolphins are most commonly impacted by fishery interactions. The research, published in PLOS One, highlights the need for conservation efforts to mitigate these effects.
Researchers found that kelp forests support nearby beaches with high biodiversity due to nutrient subsidies. The connectivity between kelp and beach ecosystems is a local process, with the strongest benefit within 10 kilometers of kelp forests.
A new study by Florida Atlantic University reveals that every arm is capable of performing all action types, with front arms mainly used for exploration and back arms supporting movement. Octopuses demonstrated remarkable flexibility, showcasing complex motor control.
The MiningImpact project is investigating the environmental impacts of deep-sea mining on ocean ecosystems. Scientists are studying biodiversity, genetic connectivity, and ecosystem health to develop indicators and threshold values for harm.
Dr. Tanja Stratmann's project investigates how deep-sea sponges have processed nitrogen since ancient times, influencing their ecosystems and shaping past environmental conditions. The study uses incubation chambers and fossilized sponges to determine the role of sponges in past ocean environments.
A new study finds that sargassum seaweed can significantly slow down sea turtle hatchlings in Florida, increasing their risk of predation and heat exposure. Researchers found that even small amounts of sargassum can impede hatchlings' progress, with leatherbacks taking 54% longer to crawl through light sargassum.
Steve Canty has been appointed as the new director of the Smithsonian's Marine Global Earth Observatory (MarineGEO) network. As part of this role, he aims to expand how MarineGEO collaborates with communities to co-develop solutions for protecting and restoring coastal environments globally.
Prochlorococcus, a cyanobacteria and photosynthesizing organism, is threatened by ocean warming. The microbe's optimal temperature range is between 66 and 86 degrees, but rising temperatures may lead to reduced productivity and impact the marine food web.
The Mediterranean Sea is warming at a faster rate than the open ocean, posing significant risks to marine ecosystems. The study highlights the urgent need for action to protect these unique ecosystems, which could collapse or remain functional depending on political decisions made now.
Researchers have discovered forehead teeth on spotted ratfish, which are used for mating and challenge traditional conceptions of dental history. The findings provide evidence that these unusual structures are indeed teeth, not denticles, and shed light on the evolution of oral teeth.