Achilles Tang
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Posts posted by Achilles Tang
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A new study could help resolve a long-standing debate in shark paleontology: From which line of species did the modern great white shark evolve?
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Micro-algae are growing faster under the influence of climate change. However, the composition of the algae is changing, as a result of which their nutritional value for other aquatic life is decreasing. And because algae are at the bottom of the food chain, climate change is exerting an effect on underwater life.
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Rising carbon dioxide in the atmosphere and the resulting effects on ocean water are making it increasingly difficult for coral reefs to grow, say scientists. A new study warns that if carbon dioxide reaches double pre-industrial levels, coral reefs can be expected to not just stop growing, but also to begin dissolving all over the world.
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New England lobstermen have gone high tech by adding low-cost instruments to their lobster pots that record bottom temperature and provide data that could help ocean circulation modelers better understand processes in the Gulf of Maine, such as how lobster larvae and other planktonic animals and plants, including those that cause harmful algal blooms, drift and settle. This information may also help determine how ocean currents disperse pollutants, invasive species, and food for whales in portions of the Gulf of Maine.
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Dust blown off the continents and deposited in the open ocean is an important source of nutrients for marine phytoplankton, the tiny algae that are the foundation of the ocean food web. But new findings show that some sources of dust also carry toxic elements that can kill marine phytoplankton.
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Oceanographers describe a novel strategy for phytoplankton growth in the vast nutrient-poor habitats of tropical and subtropical seas.
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In English!!
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More than 58 rapid sea level rises in the last five million years could account for an apparently abrupt switch in the kinds in of mammals found along the Malay Peninsula in southeast Asia -- from mainland species to island species -- in the absence of any geographical barrier, ecologists say.
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We usually think of fish as a "heart-healthy" food. Now fish are helping researchers better understand how heart disease develops in studies that could lead to new drugs to slow disease and prevent heart attacks.
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The new species of Antarctic fish, Gosztonyia antarctica, has been discovered at a depth of 650 meters in the Bellingshausen Sea in the Antarctic Ocean, an area which has not been studied since 1904 and where the fauna is ?completely? unknown.
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Scientists identified seven new species of bamboo coral in the deep waters of the Papahanaumokuakea Marine National Monument. Six of these species may represent entirely new genera, a remarkable feat given the broad classification a genus represents. Scientists expect to identify more new species as analysis of samples continues.
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"Undesirable" evolution in fish -- which makes their bodies grow smaller and fishery catches dwindle -- can actually be reversed in a few decades' time by changing our "take-the-biggest-fish" approach to commercial fishing, according to groundbreaking new research.
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A 300-million-year-old brain of a relative of sharks and ratfish has been revealed by French and American scientists using synchrotron holotomography. It is the first time that the soft tissue of such an old fossil brain has ever been found.
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Researchers assembled a database of invasive animals and plants in Washington, Oregon, and Idaho. The large numbers present included many nonindigenous fishes. The effect of the invasive species on salmonids was assessed by extrapolation from previous studies. The results indicate that non-native fishes, in particular, pose a major threat to native salmonids comparable to hatcheries, harvest, habitat loss, and changes to the hydrosystem.
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It seems we're not the only ones struggling to adapt to the summer weather -- Australian researchers have found the increased temperatures may be affecting turtles too. Scientists found that green turtle hatchlings from Heron Island weren't swimming as well as expected.
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No matter how sophisticated modern medicine becomes, common ailments like fungal infections can outrun the best of the world's antibiotics. In people with compromised immune systems (like premature babies, AIDS victims or those undergoing chemotherapy for cancer) the risk is very high: contracting a fungal infection can be deadly.
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Most wild species are expected to colonise northwards as the climate warms, but how are they going to get there when so many landscapes are covered in wheat fields and other crops? (2009-02-25)
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Researchers have found that a human vascular condition called cerebral cavernous malformation is caused by leaky junctions between cells in the lining of blood vessels. By combining studies with zebrafish and mice, they found that the aberrant junctions are the result of mutated or missing proteins in a novel biochemical process, the so-called "Heart-of-glass" CCM pathway.
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The evolutionary tendency of corals to alter their skeletal structure makes it difficult to assign them to different species. Researchers have used genetic markers to examine coral groupings and investigate how these markers relate to alterations in shape, in the process discovering that our inaccurate picture of coral species is compromising our ability to conserve coral reefs.
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Fossilized pregnant fish was one of the first animals to have sex. A pregnant fossil fish at the Natural History Museum in London has shed light on the possible origin of sex, according to a new study. Dating from the Upper Devonian period 365 million years ago, the adult placoderm fish Incisoscutum ritchiei is one of the earliest examples of a pregnant vertebrate and contains a five-centimetre-long embryo.
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Sinkholes penetrating the bottom one of North America's Great Lakes -- Lake Huron -- unexpectedly harbor exotic ecosystems akin to those in permanently iced-over Antarctic lakes and deep-sea, hydrothermal vents and cold seeps.
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Researchers have discovered potentially disease-causing vibrios (Vibrio cholerae, V. parahaemolyticus and V. vulnificus) in Norwegian seafood and inshore seawater.
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"Psychedelica" seems the perfect name for a fish that is a wild swirl of tan and peach zebra stripes and behaves in ways contrary to its brethren, including bouncing like a ball along the seafloor instead of swimming. The fish, which has rare forward-facing eyes like humans, also has a secretive nature. That could be the reason they weren't spotted by divers until just last year nor described in the scientific literature until now.
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thread closed upon request.
Phytoplankton Is Changing Along The Antarctic Peninsula
in General Reefkeeping_
Posted
As the cold, dry climate of the western Antarctic Peninsula becomes warmer and more humid, phytoplankton -- the bottom of the Antarctic food chain -- is decreasing off the northern part the peninsula and increasing further south, marine scientists have discovered.
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