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Latest Bioindicator Stories

2014-03-31 09:45:55

Members of the Cell Biology in Environmental Toxicology group have discovered evidence of "feminization" of male fish in the estuaries of Gernika, Arriluze, Santurtzi, Plentzia, Ondarroa, Deba and Pasaia. The first cases (2007-2008) were detected in Urdaibai, and the most recent data confirm that they are also taking place in other estuaries. Pollutants acting as oestrogens are responsible for this phenomenon which, among other changes, is causing ovocytes —immature ova— to appear in male...

2013-10-29 11:27:10

In a novel study, a University of Oklahoma researcher and collaborators found a common bioindicator, Hyalella azteca, used to test the toxicity of water or sediment was resistant to insecticides used in agricultural areas of central California. The study is the first to demonstrate that the indicator species may adapt to polluted conditions of a habitat and become an entirely unreliable source of information about ecosystem health. Gary Wellborn, professor of biology in the OU College of...

2010-10-05 19:03:26

Under the Water Framework Directive (WFD) (Directive 2000/60/CE), member states are required to achieve Good Water Status for water (continental, estuarine, subterranean and coastal water bodies) in Europe by 2015. Surface water quality is assessed taking into account the ecological and chemical status. The quality of aquatic systems is more accurately assessed using the status of both the water column and the underlying sediment. A recent study by researchers of AZTI-Tecnalia concluded that...

2010-05-04 14:50:05

Researchers in India have demonstrated that microscopic aquatic creatures could be used as the ecological equivalent of a canary in a coalmine for assessing inland freshwater lakes and ponds. Writing in the World Review of Science, Technology and Sustainable Development the team explains how diatoms respond badly to pollutants and sewage contamination. Bijaya Kumar Padhi, Jnanendra Rath, and Pratap Kumar Padhy of the Visva-Bharati University, in Santiniketan, India, have looked at the...

2009-12-10 10:39:00

SAN FRANCISCO, Dec. 10 /PRNewswire-USNewswire/ -- The National Health and Nutrition Examination Survey (NHANES) expected to be released today by the Centers for Disease Control (CDC) is on the right track with a focus on testing people's bodies for chemical contamination, say environmental health advocates working on chemical exposure issues. According to Pamela K. Miller, executive director of Alaska Community Action on Toxics, "While we are very relieved the CDC is stepping up its focus...

2009-10-22 15:34:09

A team of researchers at the University of British Columbia, along with colleagues at the US Dept. of Energy Joint Genome Institute, has mapped the genome of a microbe that is silently helping to shape the ecology of oxygen-minimum areas in the ocean known as dead zones. "Microbes specialize in metabolic innovation and many can use alternatives to oxygen, including nitrates, sulfates and metals, breathing these compounds instead of oxygen. These adaptations likely enable them to thrive in...

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2008-10-07 09:19:38

Scientists have found lichens can give insight into nitrogen air pollution effects on Sierra Nevada and San Bernardino mountain ecosystems, and protecting them provides safeguards for less sensitive species. Their findings are presented this month in the international journal Environmental Pollution and are significant because nitrogen from air pollution causes detrimental chemical and biological effects to terrestrial and aquatic ecosystems. Other harmful effects include elevated nitrate...

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2006-09-18 18:35:00

SAN FRANCISCO - A type of fish so common that practically every American kid who ever dropped a fishing line and a bobber into a pond has probably caught one is being enlisted in the fight against terrorism. San Francisco, New York, Washington and other big cities are using bluegills "” also known as sunfish or bream "” as a sort of canary in a coal mine to safeguard their drinking water. Small numbers of the fish are kept in tanks constantly replenished with water from the...

2005-07-12 23:35:00

A new way to monitor the effects of climate change on rainforests is being investigated at Cambridge University. Researchers are using biomarkers in the shape of epiphytes ('air-plants' which grow on other plants) to find out how their photosynthesis and water evaporation have been affected by climate change over the last 50 years. Using types of epiphytes known as bromeliads, Monica Mejia-Chang from Professor Howard Griffiths' lab in Cambridge has been measuring the levels of two stable...


Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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