Articles tagged with Marine Biology
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 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.
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...
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.
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.
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.
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.
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.
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.
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.
Researchers at OIST identified biological processes that support young clownfish adaptation to climate change and warming seas. Exposing juvenile fish to raised water temperatures showed significant changes in liver and pancreas, reducing insulin secretion and increasing oxidative phosphorylation.
A global review highlights the need for better tools to understand juvenile fish habitats, which are facing increased pressure from various factors. The study recommends incorporating metrics like growth, survival, and contribution rates to assess habitat quality.
Scientists from the Smithsonian Tropical Research Institute recorded that Panama's Pacific upwelling did not occur in 2025, leading to diminished temperature drops and productivity spikes. The researchers attribute this event to a significant reduction in wind patterns, highlighting the vulnerability of tropical upwelling systems.
A recent study found that 62% of whale sharks in the Bird's Head Seascape off Indonesian West Papua have scars and injuries from preventable human causes. Simple interventions, such as modifying traditional fishing platforms and boat designs, could greatly lessen this burden on the local population.
A new ASU study identifies the most polluted areas of coastline in West Hawaiʻi and targets for remediation, providing critical data needed to mitigate sewage contamination. The research found that cesspools, septic systems, and coastal urban development are highly predictive of water contamination.
A recent study published in Nature Communications has made a groundbreaking discovery about the contribution of phytoplankton to the global carbon cycle. Phytoplankton can directly pump stubborn carbon into the ocean, where it may persist for centuries, contradicting decades of conventional scientific wisdom.
A new study reveals the molecular mechanisms that enable SAR11, the most abundant marine bacteria, to survive in nutrient-poor environments. The research demonstrates ultra-high-affinity transporters that capture carbon sources, influencing global biogeochemical cycles and ecosystem management.
A Rutgers University study reveals that iron stress slows photosynthesis in phytoplankton, reducing oxygen production and impacting the food chain. The research found that up to 25% of light-harvesting proteins are uncoupled from energy-producing centers, wasting energy.
Researchers identified peptidoglycan hydrolases in archaea that kill bacteria, highlighting the importance of surveying diverse microbes to discover new antimicrobials. These proteins were found in 5% of surveyed archaeal species and show promise as novel antibacterial compounds.
Researchers have developed a 'tap-and-go' approach using specially adapted drones to apply monitoring tags to whales. This innovative method significantly speeds up the process while minimizing human interaction with the animals.
A pioneering study reveals how ocean acidification and warming can simultaneously affect the structure, mineral composition, and microbiome of bryozoans, a key group of invertebrates responsible for creating underwater habitats. The findings point to potentially serious ecological consequences under a scenario of accelerated climate ch...
A NUS-led study analyzed coral samples from the Maldives, extending the sea-level record by 60 years and revealing an acceleration of rising sea levels since 1959. The findings show that the Indian Ocean has been highly responsive to climatic changes, with significant sea level rise of 30cm since the mid-20th century.
The study analyzed the northbound migration of northern fur seals, revealing that they concentrate foraging activity along continental shelf-breaks and near anticyclonic eddies. The findings provide new insights into the seals' response to oceanographic conditions and highlight the importance of long-term monitoring in understanding th...
Researchers at Osaka Metropolitan University discovered medaka reproductive behavior begins in dark period around 7 a.m. and peaks at 8 a.m., with overall behavior similar to that observed in the wild, except for a 3-4 hour delay in courtship and reproduction times compared to natural environments.
A new study from the University of Maine compares two common Atlantic sea scallop farming methods, lantern net and ear-hanging. The research found that ear-hanging production is more advantageous when scallops' life cycles exceed three years, with faster rate of production and larger adductor muscles.
Scientists reconstructed the brain, heart, and fins of a 400-million-year-old fish called Norselaspis glacialis. The study found that its acute senses and powerful heart evolved well before jaws and teeth, suggesting a fast-swimming lifestyle was key to evading predators.
Researchers have established apple snails as a system to study eye regeneration, which may hold the key for restoring vision due to damage and disease. The team discovered that the snail eye is anatomically similar to humans and can regrow itself, with genes such as pax6 playing a crucial role in development.
Researchers discover Vibrio pectenicida as the causative agent behind sea star wasting disease, a devastating epidemic that has killed billions of sunflower sea stars. The discovery is crucial for recovering these species and their kelp forest ecosystems, which provide habitat for thousands of marine creatures and contribute millions t...
Researchers found that mangrove populations have nearly tripled in areas with oysters, leading to significant acidification of oyster reef sediment. Oyster shell dissolution could impact reef viability and services like filtration and storm surge reduction.
A new study reveals that a decline in ocean oxygen levels is disrupting mesopelagic fish populations and ecosystems. The findings suggest that these events could destabilize ecological balances, impair the ocean's role in carbon cycling, and threaten marine biodiversity and food security.
New research warns that climate interventions in oceans carry significant risks and may repeat past mistakes if not regulated responsibly. Experts advocate for a governance approach prioritizing sustainability, equity, and adaptability to ensure effective solutions.
A new study by the University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science reveals that deep-dwelling mesopelagic fish excrete carbonate minerals at rates comparable to shallow-water species. This finding validates previous global models suggesting that marine fish are major contributors to biogenic carbonate pr...
Researchers have discovered a new species of deep-sea limpet, measuring up to 40.5 mm in shell length, found 5,922 meters beneath the northwestern Pacific Ocean. The species, named Bathylepeta wadatsumi, has broader ecological implications as it appears to graze on sediment layers over rock.
Researchers discovered a compound, EPS3.9, produced by deep-sea bacteria that triggers pyroptosis to inhibit tumor growth and exhibit potent anti-cancer effects. The study highlights the importance of exploring marine microbial resources for developing new drugs.
A world-first study has mapped the global distribution and evolutionary relationships of brittle stars, revealing their quiet migration across entire oceans over millions of years. The research highlights the interconnectedness of deep-sea communities, particularly at temperate latitudes.
Researchers discovered that approximately 436-million-year-old brachiopods formed a non-random, checkerboard-like pattern due to their tiny setae, which allowed them to maintain optimal spacing. This study provides rare evidence of ancient communities being shaped by biological interactions.
A recent study found that the 2014-2016 Northeast Pacific marine heatwave caused unprecedented ecological disturbance, resulting in widespread kelp and seagrass declines and mass mortality events. The research highlights cascading impacts on species interactions, plankton communities, and offshore ocean productivity.
Researchers used benthic foraminifera to study the link between Atlantic Meridional Overturning Circulation (AMOC) strength and oxygen content in the eastern tropical North Atlantic. The study found that weaker AMOCs are associated with more oxygen in the oxygen-minimum zone, which has implications for marine ecosystems.
Research reveals key differences in how ocean viruses affect carbon flow, with potential climate implications. RNA viruses disrupt carbon and nutrient recycling, making it harder for bacteria to break down organic matter.
Researchers have discovered two new species of wart sea slugs from North Sulawesi, Indonesia, including Phyllidia ovata and Phyllidia fontjei. The discoveries were made possible by citizen science contributions and add to the region's rich biodiversity.
Researchers will study how ocean currents and nutrients from land influence the health and productivity of MCEs, which support diverse marine life and important fisheries. The project aims to fill critical knowledge gaps and provide science-based solutions for environmental protection and sustainable growth in the gulf region.
Located in the western Mediterranean Sea, the Caprera Canyon is home to a high concentration of cetacean species. The canyon's unique geography supports a diverse array of marine life, including whales and dolphins.
A new international study reveals that Skagerrak likely serves as a nursery area for young Greenland sharks, contrary to common associations with Arctic waters. The research also confirms that newborn sharks are born in undisturbed deep-sea areas near the Mid-Atlantic Ridge, south of Iceland.
Researchers discovered Polarella, a type of dinoflagellate, in the Eastern Tropical North Pacific Ocean, which contributes significantly to global primary production. The study found increased stress response genes and opportunistic lifestyle in Polarella, suggesting its ecological and biogeochemical role in tropical oceans.
A new study reveals that fish hovering in place consumes roughly twice the energy of resting, challenging the scientific community's long-held assumption. By analyzing fin movements and body shape, researchers found species with greater separation between their centers of mass and buoyancy use more energy when hovering.
A new study found that domesticated carp have lower chronic stress levels than their wild counterparts, despite regular angling capture. The researchers compared scale cortisol data from domesticated and wild carp and found that the former had significantly lower levels of chronic stress.
A new study found that hermit crabs with more sensory hairs on their claws recover faster from a startle response, indicating they are bolder. The research suggests a link between sensory ability and behavior, proposing a hypothesis called sensory investment syndrome.
A groundbreaking study of 7000-year-old fossilized coral reefs reveals that human fishing has transformed Caribbean reef food webs. Shark populations have declined by 75%, while prey fish species have doubled in abundance and grown 17% larger on modern reefs.
A study reveals that decades of overfishing have significantly altered the genetic composition of Eastern Baltic cod, leading to reduced growth rates and smaller sizes. The researchers found a correlation between slower growth and increased survival under high fishing pressure.
Stanford researchers measured biomass of ocean life over the past half-billion years, finding a generally increasing trend. The study aligns with evidence for a rise in marine biodiversity and suggests an evolutionary connection between biomass and biodiversity.
A new study found that individual leopard seals specialize in specific diets, significantly impacting local prey populations. The research highlights the need to examine individual hunting behaviors in apex predators.