Tag: "algae" at biology news

What we can learn from the biggest extinction in the history of Earth

...ty. When stressed by environmental conditions, the algae that inhabit the reef leave, and the reef loses color-and one reason why algae might leave is temperature. For example, when ocean temperatures rise during El Nio years, corals bl...

Computer graphics spills from milk to medicine

...ns. Similarly, if you specify the concentration of algae and different minerals in a sample of ocean water, the same theoretical model will render the color of the water. The new work extends well beyond milk and ocean water to a wide range of materials called participating media. The word participating...

ASU researchers partner with UOP to make biofuel for military jets a reality

...te the technical and economic feasibility of using algae as an alternative feedstock resource. ASUs researc... Algae Research and Biotechnology, have focused on algae as a source of renewable oil for more than 20 years. The benefits of oil produced from algae are end...

Chickens dieting to help Delaware waterways

... water-quality problems, such as massive blooms of algae and fish kills. To put it in perspective, in 2006, Delaware farmers produced over 269 million broiler chickens--1.8 billion pounds of poultry--valued at more than $739 million, according to the Delmarva Poultry Industry. Those chickens produced mor...

Waters off Washington state only second place in world where glass sponge reefs found

... 100 million years ago when diatoms, single-celled algae that also require silica dissolved in seawater, evolved in the global oceans and began using up the silica needed by the reef-building glass sponges. The Washington and British Columbia reef-building glass sponges have learned to live at water depth...

Longest study finds reef fish need longer break

...a urchins, which in turn feed on the reef-building algae on which the entire reef system depends. When fish...s, triggerfish, rabbitfish, and the coral-building algae to completely rebuild their populations to pre-fishing levels may exceed the length of the study. ...

Piecing together the cyanobacteria puzzle

LIVERMORE, Calif. -- Blue green algae are significant species in the global carbon cycle...ould image and track nutrient uptake in blue green algae at the nanoscale. The new method should help to clear up the age-old puzzle of how different species...

Marine phytoplankton changes form to protect itself from different predators

... first evidence that a common species of saltwater algae also known as phytoplankton can change form to protect itself against attack by predators that have very different feeding habits. To boost its survival chances, Phaeocystis globosa will enhance or suppress the formation of colonies based on wheth...

Better chemistry through living models

...ural systems like those in species of bacteria and algae that enlist hydrogenase enzymes in energy production. Bullock and colleagues hope "to replicate the function but not the exact structure of the natural enzymes. Recent structural studies of hydrogenase enzymes from these microorganisms have reveale...

Parasites' impact goes beyond host to affect ecosystem

....H. -- The good news, if youre grazing normally on algae in the rocky intertidal zone of the North Atlantic... -- they similarly saw less reduction of ephemeral algae by infected snails. But when researchers isolated ephemeral, or edible, algae, "we saw dramatic ch...

Healthy coral reefs hit hard by warmer temperatures

...ral's vivid hues come from symbiotic single-celled algae that live in the polyps. The algae supply much of the food coral need to survive. When disease or stressful environmental conditions ...

Healthy reefs hit hardest by warmer temperatures

...orals vivid hues come from symbiotic single-celled algae that live within the polyps cells. The algae supply much of the food coral need to survive. When disease or stressful environmental conditions st...

Puzzling plankton yield secrets to role in evolution/global photosynthesis

...A -- The analysis of DNA sequences from tiny green algae have provided new insights into the mystery of how new species of plankton evolveand further highlights their critical role in managing the global cycling of carbon. These findings, by a group led by the DOE Joint Genome Institute (DOE JGI); the Scr...

Sea snails break the law

...sually live in the water column eating microscopic algae and swimming with a specialized structure called the velum. This stage has been lost in many species, where development happens in immobile capsules protected by the mother. In these species, small bottom-dwelling juvenile snails (miniature adults)...

More nutritious, less toxic

...in length. Both groups were fed the same amount of algae contaminated with trace amounts of methylmercury; however, one group's algae was of greater nutritional value. The animals that received the nutritious, phosphorous-rich alga...

AGU Journal Highlights -- April 16, 2007

...nd 1999. The model suggests that blooms, seeded by algae released from melting sea ice, can thrive if melting and resulting low-salinity stratification at the surface are not followed by wind-driven mixing. Changes in bloom patterns between the 1997 and 1999 events resulted from the PDO switching to a cold...

UC Davis study finds high arsenic levels in herbal kelp supplements

...l activities. Due to higharsenic concentrations in algae and marine micro-organisms, seafood is thehighest dietary source of arsenic for consumers. While long-term humanexposure to arsenic from food sources such as fish does occur, it isusually significantly lower than anything approaching toxic levels.How...

A 'traffic light' for neurons means 'go' for improving brain research

...ells of interest. The gene ChR2 is derived from an algae that makes affected neurons more active when exposed to blue light. Deisseroth and collaborators first showed this in a paper in Nature Neuroscience in 2005. In this week's paper, they demonstrate that another gene, NpHR, which is borrowed from a mic...

LA Times reporters receive Public Communications Award from American Society for Microbiology

...ution in reverse," where primeval life forms, like algae and bacteria are multiplying at an alarming rate from basic nutrients that are being dumped into the ocean, while their natural buffers, competing sea life and wetlands, are being diminished. Judges called the series "just beautiful," and a "superbly...

Researchers figure out what makes a simple biological clock tick

...s which make up the biological clock in blue green algae will establish a 24-hour cycle on their own when placed in a test tube with adenosine triphosphate (ATP), the chemical that powers biological reactions. "That was a big surprise," says Carl Johnson, the professor of biological sciences who headed the...

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