Tag: "algal" at biology news
Genetic modification of linseed produces healthier omega 3 and 6 fatty acids
...esults were obtained with the use of the plant and algal
gene sequences. These transgenic plants accumulated significant levels of very long chain PUFA in their seed. Analysis of fatty acid profiles of these plants also allowed the researchers to identify constraints on the accumulation of the most desirab...
Need sex? It's probably something about stress
...test her idea, she used Volvox, the lab rat of the algal
world. Tiny spheres of gel with individual alga cells spread over the surface of the sphere like polka dots, Volvox colonies can be found in temporary ponds that fill with water in the spring and slowly dry out as summer progresses. I...
Corals can reestablish symbiosis with algae from their environments after bleaching
...esulted from the few remaining symbiotic algae, or algal
symbionts, remaining within the coral tissue since...ht or sea temperatures, can lead to a reduction in algal
densities or loss of pigmentation, leaving the coral's white skeleton visible through the clear tiss...
Alternative states in the ocean
...l Nio and has involved replacement of the original algal
dominated assemblage by a mussel bed. Starfish ar...for two possible outcomes: gradual recovery of the algal
assemblage as the mussels are consumed, or formation of a persistent alternative state if the mussel...
Increased atmospheric carbon dioxide promotes algal growth
...may increase more than expected, and that nuisance algal
blooms may be aggravated at elevated atmospheric carbon dioxide concentrations....
Fishing kills Fijian coral reefs
...iously pristine coral reefs being turned into dull algal
mats. Worryingly, Dulvy, Freckleton and Polunin - the authors of a study in the May issue of Ecology Letters -- found that light levels of exploitation by subsistence islanders fishing just for food for themselves and their families could cause such ...
Four new research centers to explore link between oceans and human health
...for the first time to study the effects of harmful algal
blooms, marine pathogens, and the oceans' vast pot...mi, directed by Lora Fleming, will study hazardous algal
blooms in subtropical ecosystems and the development of probes to identify new species and toxins. ...
Gulf of Maine Ocean Data Partnership announced
...ined with data on currents, ocean temperature, and algal
blooms to create a method to predict harmful algal
blooms. To date, organizations that have agreed to enter into this data sharing effort as sign...
New Woods Hole Center for Oceans and Human Health established
...and environmental health sciences, such as harmful algal
blooms and organisms in coastal waters and estuari...tential human health consequences, such as harmful algal
blooms (commonly called "red tides"), in the temperate coastal ocean. Many of the major urban areas ...
Lakes with zebra mussels have higher levels of toxins, MSU research finds
...ussel establishment," he said. "In addition, toxic algal
blooms in Saginaw Bay and Lake Erie are disturbing because they come after many years of expensive reductions in nutrient loading to improve water quality." Zebra mussels, which are native to the Caspian Sea region of Asia, were first discovered in L...
Discovery could lead to better treatment for cryptosporidum infections
...together from protozoan, bacterial and potentially algal
sources," according to the study. "The finding that these parasites collect useful genes from other organisms can help us to understand how they could adapt so well to a parasitic lifestyle," said Striepen. "From an applied point of view, the discove...
USGS February science picks
...uch nitrogen and other nutrients, which stimulates algal
blooms that affect water quality and block sunlight from reaching underwater grasses. The water-quality criteria proposed by the Chesapeake Bay Program probably will not be met by the goal date of 2010 because of the lag time between implementing bes...
Want a side of algae with that? Hawaiian farmers sell seaweed by the seashore
...s for coastal residents. In KKHH's hatchery tanks, algal
spores are allowed to settle onto rocks or coral chips and start growing. Then those rocks or chunks of coral are given away to the farmers so they can start their own plot of long ogo. Farmers can have a load of seaweed-covered rocks delivered by pi...
Earliest evidence of humans affecting aquatic ecology in Canada, United States
...f the pond and analyzed the fossil "markers" (tiny algal
cells) preserved in each layer. As sediments slowly accumulate over time, they represent an archive of past environmental change. Diatom algae, characterized by glass walls, provide an excellent record of past lake conditions, explains Dr. Smol. The ...
Desert dust enables algae to grow
...dy assumed that the iron in desert dust stimulated algal
growth, but this has now been demonstrated for the first time. The researchers have published their findings in the December issue of the Journal of Phycology. The biologists cultured two species of diatoms in seawater originating from the iron-deple...
How many fish in the sea? Census of Marine Life launches first report
...ders, these cod were filmed grazing on upside-down algal
pastures. This surprising find encourages further exploration under the ice. The Microscopic Microorganisms in the oceans make up for their minute size by their numbers. The 1030 microbe cells in the ocean comprise more than 90% of the mass of all ...
Rapid evolution helps hunted outwit their predators
...ecause previously they had plenty of algae to eat, algal
populations hit rock bottom, because they had been...r way out of a tough situation; in the second, the algal
population was genetically varied so that somewhere among their tiny green gene pool might be an evo...
Grazer diversity counteracts plant diversity effects on ecosystem functioning in seagrass beds
...s system, increasing grazer diversity reduced both algal
biomass and total community diversity, and facilitated dominance of a grazing-resistant invertebrate. In parallel with previous plant results, however, grazer diversity enhanced grazer biomass production, an important determinant of fish yield in aq...
Mediterranean fishery recovers, thanks to manmade pollutants
...luding bottom water hypoxia or anoxia, undesirable algal
blooms, and the loss of sea grasses and coral reefs make it clear that it is easy to deliver 'too much of a good thing' to the coastal ocean." ...
Changing global nitrogen cycle impacting human health, says Colorado University-led study
...nitrogen pouring into the world's oceans can cause algal
blooms that can harm fish, shellfish and humans. On land, ozone, a major pollutant produced with high amounts of nitrogen oxides, causes numerous health problems as well as billions of dollars of crop damage, according to the research team. "We beli...
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