Articles tagged with Marine Biology
Scientists discovered how methanogenic archaea regulate nitrogen uptake using a molecular switch that adjusts enzyme activity based on 2-oxoglutarate levels. This regulation prevents energy waste when cells have enough nitrogen.
A new study published in Palaeontologia Electronica shows the Megalodon was more slender than earlier studies suggested, changing our understanding of its behavior and impact on ancient ocean life. The revised model suggests a longer digestive canal, potentially leading to less predation pressure on other marine creatures.
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 new study by Monterey Bay Aquarium researchers found that sea otter population growth during the last century enhanced kelp forest resilience in California, increasing coverage by 56% along the central coast. However, kelp forests declined dramatically in northern and southern regions due to climate change.
The biological carbon pump is crucial for regulating atmospheric CO2 levels, but focusing solely on export flux neglects ocean circulation's impact. Changes in ocean circulation under climate change lead to increased storage of biologically produced CO2 in the interior ocean.
A new Simon Fraser University-led study tracks 100 years of salmon growth and finds that juvenile salmon are growing larger due to climate change. The study suggests maintaining freshwater habitats can help salmon adapt to warming temperatures, with relatively deep lakes becoming more important.
Researchers developed a robot prototype inspired by a snail's ability to collect food particles at the water-air interface. The device uses an undulating motion to suck in microplastics from the surface of oceans and seas.
Researchers discovered bottlenose dolphins' ability to detect weak electric fields, which helps them search for fish hidden in sediment. This newfound sense also enables dolphins to navigate the globe using magnetic maps by sensing the planet's magnetic field at varying speeds.
Researchers discovered that male ostracods create distinct patterns of bioluminescence to attract females, which are then mirrored by other males, creating a spectacular underwater display. The synchronized swim occurs after sunset at nautical twilight and is used to entice groups of females.
Researchers at UC Santa Barbara discovered that wildfire ash adds nutrients to marine systems, benefiting microbes and plankton growth. Ash enriched seawater with nitrogen sources, metals, and silicic acid, promoting primary production in coastal ecosystems.
The EUDTO-BioFlow project aims to establish a digital twin of the ocean by making critical marine biodiversity data publicly available. This will enable the simulation and study of 'what if' scenarios for effective conservation and management.
The study found that England's only resident population of bottlenose dolphins has declined to just 48 individuals due to various human impacts. The researchers call for urgent measures to protect the population and its habitats.
A University of Alaska Fairbanks team is exploring whether seaweeds can absorb rare-earth elements, with the goal of expanding the US supply and finding a low-impact alternative to mining. The project aims to determine if seaweeds can accumulate metals in concentrations that make financial recovery viable.
Scientists found that oceanic deoxygenation played a significant role in the Triassic–Jurassic mass extinction, leading to widespread ecosystem disruption and species extinctions. The global extent of deoxygenation was surprisingly similar to today's levels.
Researchers successfully cultured Rhabdamoeba marina from Japanese seawater, revealing its genetic sequence and clarifying its phylogenetic position. The study suggests reclassification into Chlorarachnea due to its close relationship with chlorarachnid algae.
New research reveals Indian Ocean seabirds face no hotspots where predators feast on prey, highlighting the need for ocean-wide protection. The study's findings suggest that international action is necessary to safeguard these birds' survival due to human activities like overfishing and pollution.
Researchers at Johannes Gutenberg University Mainz discovered a unique cryptochrome protein in marine bristle worms that distinguishes between sunlight and moonlight. The protein's structure reveals an unusual light-induced change from dimer to monomer arrangements, allowing it to synchronize reproduction with lunar phases.
Researchers found Cladophora blooms increase Bacillariophytes and alter physicochemical properties, leading to shifts in phytoplankton communities and biomass. The study suggests FABs as ecological engineers influencing alpine lake ecosystems.
Researchers at UTSA have discovered a novel strategy to inhibit the spread and infection of Vibrio cholerae, the bacteria responsible for cholera. They identified a peptide-binding domain that can disrupt the virulence of V. cholerae, preventing intestinal colonization and biofilm formation.
Researchers used genetic and molecular tools to create a 3D atlas of gene expression in starfish, revealing that the "head" is distributed across each arm and center. The study provides insight into the evolution of echinoderms, including sea stars, which have a unique body plan compared to humans.
Researchers discovered a unique protein in bristle worms that distinguishes between sunlight and moonlight. The protein, L-Cry, disassembles under intense light and forms a stable connection in the dark.
Researchers isolated five strains of Minorisa from Japanese coastlines and identified three new species: M. fusiformis, M. magna, and M. megafusiformis. These discoveries reveal the previously unknown diversity within the genus Minorisa and provide opportunities to study their ecological role.
Researchers at UMass Amherst have tracked tarpon migration patterns using acoustic telemetry, revealing two distinct subgroups of the species. The study, which gathered data over five years, has significant implications for conservation efforts, as tarpon are listed as vulnerable due to fishing, habitat loss, and degraded water quality.
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.
A study by the University of Washington and NOAA found that upgrading a culvert in Washington improved fish traffic for four species of interest: cutthroat trout, coho salmon, rainbow trout, and sockeye salmon. Meanwhile, a smaller culvert replacement had less impact on fish populations.
Researchers at Hokkaido University found a bacterium that can break down the eco-friendly polymer polybutylene succinate in marine environments. The discovery of the enzyme PBSase has the potential to improve recycling technologies and develop new marine biodegradable polymers.
The study found that the nutrient content of Sargassum tissue can help determine enrichment sources and improve predictions for managing the Great Atlantic Sargassum Belt. The researchers identified enhanced nitrogen and phosphorus levels in the seaweed, indicating a thriving population.
The newly discovered 'Margaritaville' snails, named after Jimmy Buffett's famous song, are bright yellow and have a key trait that helps them survive on coral reefs. Their brightly colored heads may serve as a warning to predators, while their mucus web traps plankton and detritus for sustenance.
Researchers discuss lurbinectedin as a method to treat neuroendocrine tumors (NETs), with encouraging results from phase II basket studies demonstrating activity in platinum-sensitive relapsed SCLC and other malignancies. Lurbinectedin's mechanism of action involves inhibiting oncogenic transcription, promoting apoptosis and cell death.
Researchers found a significant connection between biological particles and the formation of ice in Arctic clouds. The study's innovative approach revealed correlations with variables like snow cover and temperature, shedding light on the prevalence of fungal spores and their impact on climate models.
Researchers aim to access ocean waters hidden beneath ice shelves, where critical information about climate change is stored. An intelligent mothership and coordinated marine robots will communicate data from under-ice cavities, optimizing sampling and configuration.
The rock-climbing fish's setae structures convert water contact into a sticky gel-like substance, enabling dynamic adhesion. The Climbot robot replicates this mechanism to achieve tight adhesion on moving surfaces.
A recent study published in Water Biology and Security challenges the hypothesis that cyanobacteria produce β-N-methylamino-L-alanine (BMAA), a non-protein amino acid linked to neurodegenerative diseases. The study found no detectable levels of BMAA in laboratory-cultured strains and natural cyanobacterial bloom samples.
China has made significant strides in coastal wetland conservation, with notable progress in national-level legislation and stakeholder engagement. However, pressing issues persist, including habitat restoration, invasive species control, and pollution management, which require more science-based decision-making and action.
Scientists have discovered two 14ft smalltooth sand tiger sharks in Ireland's waters, a rare find suggesting the species is expanding its geographic range due to warmer sea temperatures. The discovery highlights the need for increased awareness and monitoring of these vulnerable creatures.
Sperm and northern bottlenose whales frequently feed on live halibut escaping from a deep-sea trawler net. The study found that these whales were only spotted when the catch was Greenland halibut, not redfish or thorny skate.
Researchers develop a new model predicting up to twice the original amount of subglacial water may be draining into the ocean, accelerating glacial melt and sea level rise. The theory uses satellite measurements and is a simple equation that can predict exfiltration in a fraction of a second on a laptop.
A new study identifies over 800 bivalve species that humans harvest and find to be more resilient to extinction due to their adaptability in various climates. The researchers highlight the need for sustainable management to preserve these populations, but also warn of potential risks if human demand exceeds their capacity.
Scientists measured coral calcification rates off Hawaiian Islands at depths of 230-360 feet, finding the lowest rates ever recorded for healthy corals. This is due to the efficient use of calcification by corals like Leptoseris spp., which form thin horizontal skeletons to maximize area in low-light zones.
A study by Duke University researchers has found microplastics in the fats and lungs of two-thirds of marine mammals, suggesting that ingested plastics can travel into tissues. The presence of polymer particles and fibers in whales' fat and organs may cause harm, including hormone disruption.
The Yangtze finless porpoise has evolved a specialized subcutaneous blubber layer that serves as an intelligent thermal coat, regulating body temperature in response to changing water temperatures. The blubber thickness changes with the water temperature, becoming thicker in colder waters and thinner in warmer waters.
Researchers at the Royal Ontario Museum discovered the oldest known species of swimming jellyfish, Burgessomedusa phasmiformis, in exceptionally well-preserved fossils from the Burgess Shale. This finding highlights the complexity of the Cambrian food chain and challenges previous understanding of predation.
Researchers found that filter-feeding basking sharks keep their core regions warmer than the water, like fast-swimming apex predators. This discovery has implications for conservation and raises ecological questions about metabolism and distribution shifts during climate change.
A new study uncovers significant scientific breakthroughs in the taxonomy of Ophiothrix angulata, revealing a complex species diversity with multiple genetic and morphological characteristics. The research identifies two distinct genetic clades and challenges traditional coloration-based classification methods.
Researchers at Penn State discovered that bioluminescent bacteria use a small RNA molecule called Qrr1 to coordinate their behavior and colonize the squid's light organ. This mechanism is likely widespread among bacteria, enabling them to exploit quorum sensing pathways.
A new study provides new insights into the genomic architecture and evolutionary mechanisms that have allowed clownfish to diversify and thrive in various ecological niches. The study revealed a genome-wide acceleration in evolution among clownfish, with over 5% of all genes found to be under positive selection.
A new hedging strategy for coral restoration balances species diversity and ecosystem benefits by selecting key species that maintain critical functions. The approach considers a range of local species and ecological characteristics to ensure the most effective restoration outcomes.
Researchers discovered that octopuses transition between quiet and active stages of sleep, with the latter resembling neural activity seen when awake. This active stage may be essential for octopus function and potentially related to dreaming.
A study on the glass sponge Aphrocallistes vastus genome provides insights into silica biomineralization and its evolutionary history. The compact genome identified genes connected to mineral skeleton growth, suggesting independent development in different sponge classes.
The study found that multiple copies of two genes, cldnj and fthl27, enable the hadal snailfish to maintain auditory senses and withstand high pressure. The fish's genetic variations allowed it to adapt to the absence of light in the deep sea, with some genes related to circadian rhythms lost.
The InVADER Mission successfully deployed a high-tech laser laboratory on the ocean floor, marking a paradigm shift in ocean research and exploration. The Laser Divebot collects compositional data without disturbing the environment, removing the need for physical samples.
ASU's new collaboration, ʻĀkoʻakoʻa, aims to restore coral reef vitality and coastal sustainability through a partnership between scientists and local communities in Hawaiʻi. The initiative focuses on West Hawaiʻi island, where 120 miles of reef harbor diverse human and coral conditions.
Researchers at the University of Gothenburg have discovered twenty species of sea lettuce in the Baltic Sea region, including three invasive species. The survey highlights the importance of knowing which species grow in specific areas to maintain and protect valuable ecosystems.
Researchers at UC San Diego found that squid employ RNA recoding to change amino acids in molecular motors, improving their function in colder waters. This process allows cephalopods to adapt to changing environmental conditions and survive in a broad range of ocean temperatures.
Researchers found that two-spot octopuses produce different neural proteins under warm versus cool conditions by editing their RNA. This rewiring likely protects their brains and may be used widely amongst octopuses and squid. Temperature-sensitive RNA editing occurs rapidly, with significant changes occurring within days.
A new study using CRISPR/Cas9 technology has identified a critical gene, SLC4γ, required for young coral colonies to build their skeletons. This gene is unique to stony corals and may have evolved to support skeleton formation.
Archaea of the genus Candidatus Alkanophaga use variants of methyl-coenzyme M reductase to degrade liquid petroleum alkanes at high temperatures. Bacteria of the genus Thermodesulfobacterium form consortia with archaea, facilitating degradation and contributing to the global carbon cycle.
Researchers discovered fragments of RNA viruses embedded in coral partners' genomes, dating back 160 million years. The discovery provides insights into how corals fight off viral infections and may hold the key to understanding the ecological impact of viruses on reef health.
Researchers have uncovered a previously unknown process in marine phytoplankton that accounts for between 7% to 25% of all oxygen produced and carbon fixed in the ocean. This discovery sheds light on how tiny organisms contribute to global oxygen production, with potential implications for our understanding of evolution.
The study investigates toxic effects of pesticides (chlorpyrifos, acetochlor, dicofol) on S. costatum growth and chlorophyll-a content, revealing varying toxicity levels among the pesticides. Marine microalgae partially degrade pesticides, with acetochlor showing stronger persistence.