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Tag: "marine" at biology news

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

... fisheries," says Charles Peterson, a professor of marine sciences biology and ecology at the Institute of Marine Sciences, University of North Carolina at Chapel Hill and co-leader of the study. The research builds upon an earlier study by Myers and Baum, published in Science in 2003, which used data ...

Research project tackles 'regeneration' gap

... all major human neurological diseases in a simple marine snail, as well as more than 600 genes that control development. In the realm of adult human stem cells, Brain Institute researchers have shown ordinary human brain cells can generate new brain tissue in mice and produce large amounts of new brain cel...

Microbes compete with animals for food by making it stink

...total them up, they are appreciable, especially in marine ecosystems. "Microbes that can hold onto these resources and use them for their own growth would be advantaged over microbes that could not prevent their resource from being consumed by animals," Hay added. "If microbes could produce chemicals that...

By 2048 all current fish, seafood species projected to collapse

...ime -- by 2048." Worm is an assistant professor of marine conservation biology at Dalhousie University, Hali...team of ecologists and economists studied the role marine biodiversity plays in maintaining ecosystem services, which are those goods and functions that are e...

Record ozone loss during 2006 over South Pole

...ing the risk of skin cancer, cataracts and harm to marine life. The thinning of the ozone is caused by the presence of pollutants in the atmosphere such as chlorine, originating from man-made pollutants like chlorofluorocarbons (CFCs), which have still not vanished from the air despite being banned under...

Bacteria in small sea life yield new way to make potential cancer drugs

...c bacteria that live only in sea squirts and other marine life. These bacteria are responsible for making a wealth of chemicals, which accumulate in the tissues of sea squirts and may help to defend them against predators. Many of these chemicals have anticancer properties, but harvesting them in quantities...

Hundreds of thousands of viral species present in the world's oceans

... Angly and colleagues analyzed the distribution of marine phages among the sampling sites and found a correl...nce of viral species, supporting the idea that the marine virome varies from region to region. They also investigated how similar the viromes from each locati...

NASA satellite data helps assess the health of Florida's coral reef

...." Coral is a rocklike deposit of skeletons from marine animals that accumulate to form reefs, providing habitat for more than 1 million species of plants and animals while also protecting coastlines from storm damage and erosion. Researchers say that up to one-fifth of the world's coral reefs have been...

Researchers link ocean organisms with increased cloud cover and potential climate change

...ty. We can now see very strongly the influence of marine biology on oceanic clouds." Researchers had previously theorized that dimethyl sulfide (DMS) ?which is also emitted by phytoplankton ?affects the formation of clouds by increasing the number of sulfate particles, which can absorb moisture and form...

Proteins necessary for brain development found to be critical for long-term memory

...riment, the scientists used wild-caught Aplysia, a marine snail frequently studied in learning and memory because of its large brain cells. The Aplysia received a series of five tail shocks, spaced 15 minutes apart. The shocks cause the animals to exhibit heightened withdrawal reflexes days and weeks after ...

Sea urchin genome suprisingly similar to man and may hold key to cures

... for 23,300 genes. Sea urchins are echinoderms, marine animals that originated more than 540 million year...ning the development of pigment cells found in the marine creatures. Those cells also might provide some insight into human immunity to diseases. Calestani...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...e-rich environments--are on average older than the marine mollusk community as a whole, according to a new r...ogical record is a full epoch earlier than that of marine mollusks in general, according to Steffen Kiel and Crispin Little of the University of Leeds. These...

Scientist's persistence sheds light on marine science riddle

...sea animals using Rosenberg's detailed database of marine snails. They find a similar pattern: when species colonize the deep sea, large-bodied species become smaller and small-bodied species become larger. "I've been building the Malacolog database for many years as a tool for research, summarizing infor...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...e and chemistry on archaeal communities inhabiting marine hydrothermal vents on the island of Vulcano, Italy...philic archaea were ubiquitous and abundant in the marine environment, but it was unclear exactly how these organisms were making a living,'' Francis said. ''...

First Biodiversity Census of coral reef ecosystems in the NW Hawaiian Islands

...l reef biodiversity in the largest fully protected marine area in the world--the Northwestern Hawaiian Islands Marine National Monument. Led by the National Oceanic and Atmospheric Administration (NOAA) Pacific Islands Fisheries Science Center, with funding from NOAA's Coral Reef Conservation Program and t...

Small, smaller, smallest -- The plight of the vaquita

...nly west of 114º20'W), an area rich and diverse in marine mammals. It is somewhat surprising that the porpoi...em. Is the vaquita destined to become the first marine cetacean to go extinct in modern times because of anthropogenic factors" How can this sad prospect b...

Rising ocean temperatures, pollution have oysters in hot water

...ng water, oysters create a kind of reef that other marine life depends upon. "Studies have shown that the...The oyster beds are also important to a variety of marine life that serves as food for larger fish. It was within this context that the North Carolina team di...

Climate experts search for answers in the oceans

...emperature story." Phytoplankton, microscopic marine plants that drift on or near the surface of the sea, absorb atmospheric carbon dioxide through photosynthesis and convert it into organic carbon. This process is known as primary production. While individually microscopic, phytoplankton chlorophyll c...

Too mellow for our predatory world

... has certain advantages. This is also true for the marine iguanas. For millions of years they have lived wit... Martin Wikelski wanted to find out to what extent marine iguanas from various populations and with different predator-experiences would differ in terms of st...

Oldest animal fossils may have been bacteria

...Bailey said. Also in 2005, University of Georgia marine biologists Samantha Joye and Karen Kalanetra, who are co-authors on Bailey's study, found that Thiomargarita can multiply by reductive cell division, a process rare among bacteria but typical of animal embryos. Bailey knew that the fossils had been...

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