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Tag: "abundance" at biology news

UCSB scientists probe sea floor venting to gain understanding of early life on Earth

...ogy. The discovery of deep sea hot springs and an abundance of microbes in the subseafloor are among the most remarkable scientific findings in Earth science during the latter half of the twentieth century, and have now become a powerful motivation for research and exploration, according to the National Scien...

Growth in the sea comes down to a struggle for iron

...han a century, oceanographers puzzled over the low abundance of phytoplankton in some ocean waters that seemed to hold all the basic nutrients for life. Speculation that iron provided part of the answer goes back to the 1930s. However, it wasn't until 1989 in the journal Nature that oceanographer John Martin r...

Breakthrough Microarray-based Technology for the Study of Cancer

...es to correlate genomic copy alterations with mRNA abundance andprotein abundance, is going to incite a huge body of experimentationand publication among the cancer research community."In the past, comparative genomic hybridization was performed throughthe optical imaging of whole chromosomes, a technique with...

Found: Missing sequence of the human Y chromosome

...o decodeits sequence. It contains an extraordinary abundance of repetitiveelements, including transposons and tandem arrays of satellitesequences. This highly repetitive, transcriptionally dormant genomiclandscape, termed "heterochromatin," defines approximately two-thirdsof the Y chromosome, including a secti...

The secret lives of whales

...spersal of deep-sea species. “If you calculate the abundance of whale falls on the sea floor ?say for grey whales in the northeast Pacific, the neighboring whale falls are about 5-10 kilometers away, which is a very reasonable dispersal distance for the animals that live on them,?says Smith. In the North Atla...

Researchers reveal the infectious impact of salmon farms on wild salmon

... wild migration route." This increase in sea lice abundance is likely to be damaging for already dwindling wil...al for re-infections up and down the coast. As the abundance of lice increases, we are now realizing that lice will attack other species, not only salmon, but ot...

A new study examines how shared pathogens affect host populations

...ies may result because of loss or reduction in the abundance of species in the community, without any numerical or genetic change in the host or pathogen. Studying only the target species or the abiotic environment would not reveal the cause of the epidemic. Their results have not only important consequences f...

New online portal merges vast data on Gulf of Maine ecosystem

...f fish in the different areas of the Gulf, and how abundance and distribution is changing over time. And the da...ne more complex relationships, such as the way the abundance of one species may vary with another, or how species may be affected by variations in temperature an...

Gray wolves maintain the food chain in winter

...ngers. With or without wolves, late-winter carrion abundance will decline with shorter winters. But wolf kills buffer these shortages, providing meals that could determine whether scavengers will be able to survive and reproduce. It seems clear that wolves have the potential to provide a safety net for scaven...

Study reveals new technique for fingerprinting environmental samples

... for microbes living in surface water there was an abundance of genes involved in photosynthesis in samples col...s. Rubin argues that the genes and their relative abundance as gleaned from EGTs reflect the intricate physical and biochemical details of a given environment w...

Aggressive aquatic species invading Great Lakes

...s Balshine. The researchers found that round goby abundance has increased dramatically throughout the Great Lakes basin since its arrival from the Black and Caspian Seas in 1990. Previous research has shown that round gobies eat eggs and young of various native species. Scientists believe that gobies have con...

Anammox bacteria produce nitrogen gas in oceans' snackbar

...NA analyses of water samples was used to proof the abundance of anammox bacteria in the Atlantic Ocean. The discovery of anammox bacteria in the open ocean has major consequences for our understanding of the global nitrogen cycle. Models of global nitrogen budgets, which play an important role in long term cli...

Taking the piste out of Alpine vegetation

...h snowbed and late-flowering species increasing in abundance while wind-edge and early-flowering species declined. This is due to delayed snow-melt in areas covered with artificial snow, and the fact that artificial snow is made from river and lake water which contains more minerals and other chemical compound...

Scientists analyze chromosomes 2 and 4

...s. In addition, the tract is flanked by an unusual abundance of another type of DNA duplication, called a segmental duplication. "These data raise the possibility of a new tool for studying genome evolution. We may be able to find other chromosomes that have disappeared over the course of time by searching ot...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

... "This experiment revealed that the RNA transcript abundance of the erythromycin-producing genes remained higher for longer times in the Saccharopolyspora erythraea mutant strain," Kao said. Searching for mutations When researchers reveal how mutants overproduce antibiotics, the real work has only just begun...

Chronic Sinus Infection Thought To Be Tissue Issue, Mayo Clinic Scientists Show It's Snot

... and attached mucus, the investigators observed an abundance of major basic protein throughout the nasal and sinus mucus in all 22 specimens, but not in the tissue. Chronic sinus infection is one of the most common chronic diseases in the United States, affecting 32 million adults, according to the National C...

Researchers reveal secret of key protein in brain and heart function

... of synapse-associated protein 97 (SAP97) found in abundance in the heart and head, where it is believed to play a role in everything from cardiac contractions to memory creation. Results are published in The Journal of Biological Chemistry. Dale Mierke, associate professor of medical science at Brown, said t...

UN: World in big ecological mess

... in ecosystems such as deforestation influence the abundance of human pathogens such as malaria and cholera, as well as the risk of emergence of new diseases. Malaria, for example, accounts for 11 per cent of the disease burden in Africa and had it been eliminated 35 years ago, the continent's gross domestic p...

Using computers and DNA to count bacteria

...With improved analytical methods, we show that the abundance distribution and total diversity of soil-borne bacteria can be deciphered," said Dunbar. "More than a million distinct genomes were present in the pristine soil, exceeding previous estimates by two orders of magnitude. When we examined the populati...

Comparison of Cocaine, Methamphetamine ‘Highs?Finds Differences

...With improved analytical methods, we show that the abundance distribution and total diversity of soil-borne bacteria can be deciphered," said Dunbar. "More than a million distinct genomes were present in the pristine soil, exceeding previous estimates by two orders of magnitude. When we examined the populati...

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