The Threespine stickleback fish is known to have evolved independently from its marine ancestors, a process called parallel evolution. A new study details the genomic changes that drive their rapid evolution, the findings from which may shed light on the process of natural selection in other species.
A new paper in Scientific Reports led by researchers at William & Mary's Virginia Institute of Marine Science challenges increased salinity and seawater temperatures as the established explanation for a decades-long increase in the prevalence and deadliness of a major oyster disease in the coastal waters of the mid-Atlantic.
Using a numerical model that simulates ocean currents, researchers are shedding light on the important “motion of the ocean” in the Straits of Florida. They have conducted a first-of-its-kind study identifying the mechanisms behind the formation of sub-mesoscale eddies, which have important environmental implications and play a significant role in the health of the Florida Keys coral reef ecosystem.
An innovative underwater robot known as Mesobot is providing researchers with deeper insight into the vast mid-ocean region known as the “twilight zone.” Capable of tracking and recording high-resolution images of slow-moving and fragile zooplankton, gelatinous animals, and particles, Mesobot greatly expands scientists’ ability to observe creatures in their mesopelagic habitat with minimal disturbance. This advance in engineering will enable greater understanding of the role these creatures play in transporting carbon dioxide from the atmosphere to the deep sea, as well as how commercial exploitation of twilight zone fisheries might affect the marine ecosystem.
While best known as the code for genetic information, DNA is also a nutrient for specialised microbes. An international team of researchers led by Kenneth Wasmund and Alexander Loy from the University of Vienna has discovered several bacteria in sediment samples from the Atlantic Ocean that use DNA as a food source.
Endangered blue whales are present and singing off the southwest coast of India. The results provide insight into a poorly studied population and suggest conservation measures should include this region.
Researchers from Tel Aviv University took part in a new international study proposing an amendment to the widely accepted theory on the extinction of animal species - by moving the focus from the animal's body size to its reproductive capacity.
Converting Central American tropical forests into agricultural land is changing the colour and composition of natural material washing into nearby rivers, making it less likely to decompose before it reaches the ocean, a new Southampton-led study has shown.
By: Bill Wellock | Published: June 7, 2021 | 2:14 pm | SHARE: Sea turtles have existed on Earth for more than 100 million years.But today, most species of these oceangoing reptiles are threatened or endangered. Scientists and resource managers are working to better understand and manage their populations, and they’re using work like that led by Mariana Fuentes, an associate professor in the Department of Earth, Ocean and Atmospheric Science at Florida State University.
Two new papers explore this question and provide examples of conditions that lead to massive plankton blooms with vastly different potential impacts on the ecosystem, according to McGillicuddy, co-author of both papers. Both papers also point to importance of using advanced technology—including Video Plankton Recorders, autonomous underwater vehicles, and the Ocean Observatories Initiative’s Coastal Pioneer Array—to find and monitor these blooms.
Decades of research has revealed the remarkable morphological adaptations of sea snakes to aquatic life, which include paddle-shaped tails, salt-excreting glands, and the ability to breathe through their skin.
In a new study published in Biological Journal of the Linnean Society, researchers at the University of Adelaide detail the enlarged touch receptors that evolved in male turtle-headed sea snakes (Emydocephalus annulatus), to help them locate and court females in aquatic environments.
As Australia officially enters winter, UniSA ecologists are urging coastal communities to embrace all that the season brings, including the sometimes-unwelcome deposits of brown seaweed that can accumulate on the southern shores.
Since arriving to the northern Atlantic Ocean less than 30 years ago, lionfish have quickly become one of the most widespread and voracious invasive species, negatively impacting marine ecosystems--particularly coral reefs--from the northeast coast of the United States to the Caribbean Islands.
All fish are not created equal, at least when it comes to nutritional benefits. This truth has important implications for how declining fish biodiversity can affect human nutrition, according to a computer modeling study led by Cornell and Columbia University researchers.
Global oceans absorb about 25% of the carbon dioxide released into the atmosphere when fossil fuels are burned. Electricity-eating bacteria known as photoferrotrophs could provide a boost to this essential process, according to new research from Washington University in St. Louis.Scientists led by Arpita Bose, assistant professor of biology in Arts & Sciences, found that bacteria found in brackish sediments can “eat” electricity and, in the process, absorb and lock away climate-warming carbon dioxide.
As more dissolved organic matter enters lakes across the northeast United States, darkening the lakes in a phenomena called “browning,” research published today in Limnology and Oceanography Letters shows that these waters may be growing less productive and able to sustain less life.
Many seabirds in the Northern Hemisphere are struggling to breed — and in the Southern Hemisphere, they may not be far behind. These are the conclusions of a study, published May 28 in Science, analyzing more than 50 years of breeding records for 67 seabird species worldwide.
Woods Hole, Mass. (May 27, 2021) - With the expansion of oxygen-depleted waters in the oceans due to climate change, some species of foraminifera (forams, a type of protist or single-celled eukaryote) that thrive in those conditions could be big winners, biologically speaking.
Scientists have discovered dramatic changes in the chemistry and composition of Sargassum, floating brown seaweed, transforming this vibrant living organism into a toxic “dead zone.” Results suggest that increased nitrogen availability from natural and anthropogenic sources, including sewage, is supporting blooms of Sargassum and turning a critical nursery habitat into harmful algal blooms with catastrophic impacts on coastal ecosystems, economies, and human health. Globally, harmful algal blooms are related to increased nutrient pollution.
A new study shows that the current rate of biodiversity decline in freshwater ecosystems outcompetes that at the end-Cretaceous extinction that killed the dinosaurs: damage now being done in decades to centuries may take millions of years to undo.
Three research projects studying sea-level rise received a total of $1.1 million in funding from California State University Council on Ocean Affairs, Science and Technology (COAST) and California Sea Grant. The grant supports 11 researchers and 20 students from six CSU campuses.
Whether it's plankton exposed to parasites or people exposed to pathogens, a host's initial immune response plays an integral role in determining whether infection occurs and to what degree it spreads within a population, new University of Colorado Boulder research suggests.
Scientists from Hokkaido University have used species survey and climate data to identify two marine biodiversity refugia in the Eastern Bering Sea - regions where species richness, community stability and climate stability are high.
A new study, by researchers from Simon Fraser University and the Department of Fisheries and Oceans, reveals the trade-offs of fish biodiversity--its costs and benefits to mixed-stock fisheries--and points to a potential way to harness the benefits while avoiding costs to fishery performance.
In previously unstudied gopher tortoise aggregations, researchers found that overall, 42.9 percent had circulating antibodies to an infectious bacterium that causes upper respiratory tract disease. Physical examination showed that 19.8 percent had clinical signs consistent with upper respiratory tract disease and 13.2 percent had some form of physical abnormality. None of the tortoises tested positive for Ranavirus or Herpesvirus, which represents important baseline data, since these viruses are thought to be emerging pathogens of other tortoise and turtle species.
Each year, many shark species migrate hundreds of miles, traversing ocean waters to return to the same spot year after year. Now, Florida State University researchers have found that sharks likely use the Earth’s magnetic fields to help guide them on these long-distance journeys.
A massive collaborative research project covered in the journal Nature this week offers projections to the year 2100 of future sea-level rise from all sources of land ice, offering the most complete projections created to date.
Woods Hole, Mass. (May 5, 2021) – Students and educators have grown accustomed to distance learning over the past year. But a new twist in remote learning kicked off on May 3 when Woods Hole Oceanographic Institution (WHOI) launched its seventeenth Dive and Discover expedition, an 18-day science research cruise out of Vigo, Spain to explore the ocean’s midwater, or twilight zone. Started in 2000, Dive and Discover is WHOI’s popular public outreach and educational platform, providing daily updates from some of the most remote locations on the planet. On this mission, virtual participants will follow along aboard the Spanish research vessel Sarmiento de Gamboa as scientists and engineers use some of the most advanced research tools available to study the twilight zone, which lies just beneath the sunlit surface waters and teems with life. The Sarmiento de Gamboa will be joining two others that are a part of the NASA-funded EXPORTS mission operating in the same location
A new Cornell University-led study examines how temperature affects fishing behavior and catches among inland fisher households in Cambodia, with important implications for understanding climate change.
Woods Hole, Mass. (April 28, 2021) --Woods Hole Oceanographic Institution (WHOI) today announced the establishment of the Francis E. Fowler IV Center for Ocean and Climate to seek new knowledge and new solutions at the intersection of oceanography and climate science. A generous gift from Francis E. Fowler IV established the center and will enable it to immediately commence operations.
New Curtin research has found urgent action is needed to ensure man-made underwater noise in Australian waters does not escalate to levels which could be harmful to marine animals, such as whales, and negatively impact our pristine oceans.
In an effort to fight the millions of tons of marine litter floating in the ocean, Florida State University researchers have developed a new virtual tool to track this debris. Their work, which was published in Frontiers in Marine Science, will help provide answers to help monitor and deal with the problem of marine litter.
Industrial fleets from countries around the world have been increasingly fishing in African waters, but with climate change and increasing pollution threatening Africa’s fish stocks, there is a growing concern of the sustainability of these marine fisheries if they continue to be exploited by foreign countries.