Navigation Links
Health of coral reefs detected from orbit

Australian researchers have found Envisat's MERIS sensor can detect coral bleaching down to ten metres deep. This means Envisat could potentially monitor impacted coral reefs worldwide on a twice-weekly basis.

Coral bleaching happens when symbiotic algae living in symbiosis with living coral polyps (and providing them their distinctive colours) are expelled. The whitening coral may die with subsequent impacts on the reef ecosystem, and thus fisheries, regional tourism and coastal protection. Coral bleaching is linked to sea temperatures above normal summer maxima and to solar radiation. Bleaching may take place on localised and mass scales ?there was an extensive bleaching event in 1998 and 2002 likely linked to El Ni�o events.

"An increase in frequency of coral bleaching may be one of the first tangible environmental effects of global warming," states Dr. Arnold Dekker of Australia's Commonwealth Scientific and Industrial Research Organisation's (CSIRO) Wealth from Oceans Flagship program."The concern is that coral reefs might pass a critical bleaching threshold beyond which they are unable to regenerate."

Aerial or boat-based observation is the current method of detecting bleaching, but many reefs are either inaccessible or simply too large (the Great Barrier Reef has an area of 350 000 square kilometres) for an event that happens within a fortnight. Bleached corals may rapidly be colonised by blue-green to brown algae, more difficult to distinguish from live coral.

Repetitive, objective and broad-scale satellite coverage is the alternative. At this week's MERIS/AATSR Workshop in Frascati, Italy, the CSIRO team presented initial results using Envisat's Medium Resolution Imaging Spectrometer (MERIS). MERIS acquires images in 15 different spectral bands at 300 m resolution.

"Coral bleaching needs to be mapped at the global scale," Dekker adds. "High-spatial resolution satellites can only do it on a few reefs due to cost a
'"/>

Source:European Space Agency


Page: 1 2

Related biology news :

1. BioMed Central welcomes the new National Institutes of Health public access policy
2. OneWorld Health drug receives Orphan designation from U.S. and European regulatory agencies
3. Health costs soar as 60 million Americans classed as obese
4. Going To Extremes To Improve Human Health
5. Patient-choice C-section rate rises 36%: HealthGrades study
6. Grand Challenges in Global Health initiative funds Yale project
7. Health benefits of a Christmas brandy
8. Health of Acehnese reefs in the wake of the tsunami shows human impacts more harmful
9. Healthy coral reefs of Madagascar resisting damage from climate change
10. Health Canada approves cold and flu medicine
11. Mailman School of Public Health researchers report blood DNA can be early predictor of liver cancer
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Health coral reefs detected from orbit

(Date:4/20/2015)... , April 20, 2015 ...   Glenbeigh Records Management (GRM), Ireland,s ... with Dubai Islamic Bank. Having built up an impressive track ... now a leading player within the records management sector in ... expects to double is GCC staffbase and employ a further ...
(Date:4/13/2015)... YORK , April 13, 2015 ... by TechSci Research, "Global Biometrics Market Forecast & Opportunities, ... register a CAGR of around 14% till 2020. ... governments for large scale implementation and review of ... and launch of new products with greater efficiency, ...
(Date:4/8/2015)...  Infinisource, a leading provider of SaaS-based Human Capital ... leading supplier of biometric identification and security solutions, ... advanced biometrically-enabled time clock, the companies announced today. ... setting a bold, new standard for the collection ... and mid-size employer. When connected to the iSolved ...
Breaking Biology News(10 mins):Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3
... global leader in forming a proactive response to climate change, ... to the challenges and opportunities the changing climate presents. The ... City Panel on Climate Change (NPCC) and published in the ... outline the measures the city will take to proactively respond ...
... Mass. Since the 1990s, a green fluorescent protein known ... a Pacific Northwest jellyfish, GFP allows scientists to visualize proteins ... their business. Two years ago, biologists who discovered and developed ... for their work. However, using GFP as a fluorescent ...
... May 2010 Red blood cells, the delivery men that ... lives. To keep enough of them in circulation, the human ... even more in response to challenges like severe blood ... of Experimental Medicine , scientists at the European Molecular Biology ...
Cached Biology News:How New York City is preparing for climate change 2How New York City is preparing for climate change 3MIT chemists design new way to fluorescently label proteins 2Making enough red blood cells 2
(Date:4/17/2015)... , April 17, 2015  Centrillion Technologies, ... SBIR grant from the National Human Genome ... of Health (NIH). The grant will help ... the development of breakthrough genomic technologies, including ... fabricated substrates. Centrillion has been developing this ...
(Date:4/17/2015)... April 17, 2015 CIO Review ( ... its 20 Most Promising Pharma and Life Science Technology ... MediSpend global compliance software platform for life sciences companies. ... by a panel of experts and members of CIO ... “MMIS’s MediSpend Platform has been on our radar for ...
(Date:4/17/2015)... -- Guggenheim Securities, the investment banking and capital markets division ... William Tanner as a Managing Director and senior ... work at Guggenheim in May 2015 in the firm,s ... "Bill brings a wealth of biotech experience, in both ... acclaimed healthcare team," said Matthew Johnson , Senior ...
(Date:4/17/2015)... April 17, 2015 Global Stem ... GTCbio Stem Cell Summit 2015 April 27 - 29, ... latest developments in all areas of stem cell research ... stem cells and regenerative medicine. , The conference ... as well as translational research in stem cell therapies, ...
Breaking Biology Technology:MMIS Chosen by CIO Review as Top 20 Most Promising Pharma and Life Science Technology Solution Providers 2015 2Guggenheim Securities Hires Biotech Analyst William Tanner in Expansion of Healthcare Coverage 2Global Stem Cells Group To Join GTCbio Stem Cell and Regenerative Medicine Summit in Boston, April 27-29, 2015 2Global Stem Cells Group To Join GTCbio Stem Cell and Regenerative Medicine Summit in Boston, April 27-29, 2015 3
... Net Loss Per Share, SAN JOSE, Calif., April ... a leading provider of medical devices,for the minimally invasive ... the first quarter ended March 31, 2008., Net ... to $18.9,million compared with $15.6 million for the first ...
... Available Online at DiscoverTesting.com, Test Kit Developed in Response to ... Consumer ... Silver Lake Research unveils,its newest Watersafe product this week, addressing ... Well Water Test Kit tests for ten contaminants with easy-to-use,at-home ...
... DIEGO, April 21 /PRNewswire-FirstCall/ - MIGENIX Inc.,(TSX: MGI, ... infectious,diseases, has appointed Pieter Dorsman to its Board ... of Redpeaks Management, Inc., a,financial consulting firm in ... development, legal structure and overall business,strategies. Prior to ...
Cached Biology Technology:VNUS Medical Technologies Reports First-Quarter 2008 Results: 21% growth in Net Revenues and 51% Growth in Unit Sales 2VNUS Medical Technologies Reports First-Quarter 2008 Results: 21% growth in Net Revenues and 51% Growth in Unit Sales 3VNUS Medical Technologies Reports First-Quarter 2008 Results: 21% growth in Net Revenues and 51% Growth in Unit Sales 4VNUS Medical Technologies Reports First-Quarter 2008 Results: 21% growth in Net Revenues and 51% Growth in Unit Sales 5VNUS Medical Technologies Reports First-Quarter 2008 Results: 21% growth in Net Revenues and 51% Growth in Unit Sales 6VNUS Medical Technologies Reports First-Quarter 2008 Results: 21% growth in Net Revenues and 51% Growth in Unit Sales 7Silver Lake Research Unveils Watersafe(R) Well Water Test Kit 2MIGENIX Appoints Pieter Dorsman to Board of Directors 2
Active GST Protein...
Cyno macaque plasma and serum - various quantities available...
adult...
Natural Mouse Laminin is purified from the Engelbreth-Holm-Swarm (EHS) sarcoma and is provided in Tris-buffered saline....
Biology Products: