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´┐Żo 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:1/22/2015)... , Jan. 13, 2015  Today, FreeWavz ( ... launched its crowdfunding campaign on Fundable, https://www.fundable.com/freewavz ... build of production capacity to meet customer demand. ... Photo - http://photos.prnewswire.com/prnh/20150113/168790 ...
(Date:1/22/2015)... YORK and POINT ROBERTS, Washington ... news source covering leading sectors including technology and tech stocks, ... Privacy marketplace featuring master pickpocket and security consultant Apollo ... is stolen and talks about the Wocket™ biometric smart wallet, ...
(Date:1/22/2015)... CHARLOTTE, N.C. , Jan. 22, 2015 Infinisource has ... introduction of the G2 model. The G2 sets a higher ... company,s iSolved human capital management solution. With plug-and-play installation, touch ... G2 time clock provides a robust time collection solution for ...
Breaking Biology News(10 mins):FreeWavz Launches on Fundable to Drive Speed-to-Market in 2015 2Apollo Robbins Talks about the Illusion of Personal Safety and How Easily Your Wallet is Stolen; If a Wocket Wallet is Stolen the Thief Can't do Anything With it! 2Apollo Robbins Talks about the Illusion of Personal Safety and How Easily Your Wallet is Stolen; If a Wocket Wallet is Stolen the Thief Can't do Anything With it! 3Infinisource's NXG series sets new time clock standard 2
... - Through an international collaboration, more than 200 ... this week on the relationship between poverty and ... of Science Editors, includes presentations on seven of ... from the National Institutes of Health on Monday, ...
... through which pheromones stimulate mating in yeast have been ... (EMBL). Similar signal chains are found in humans, where ... the differentiation of nerve cells and the development of ... observe for the first time the interplay of signalling ...
... While looks can be deceiving, heredity is revealing, and ... common field mouse report that what,s most revealing to ... change. Oliver Pergams, visiting research assistant professor of ... and Robert Lacy, population geneticist and conservation biologist at ...
Cached Biology News:200 journals join in theme issues on poverty and human development 2200 journals join in theme issues on poverty and human development 3200 journals join in theme issues on poverty and human development 4200 journals join in theme issues on poverty and human development 5Scientists uncover how hormones achieve their effects 2Mice roar message: genetic change happens fast 2
(Date:1/22/2015)... Pipette.com has added the Eppendorf ... portfolio of Eppendorf products. , The Eppendorf Centrifuge 5424/5424 ... 5424/5424 R and receive the following:, , ... or Eppendorf Reference 2 ,     3 Free ...
(Date:1/22/2015)... Selexis SA, a serial innovation company ... (RCBs) used for drug discovery to commercial manufacturing, announced ... Next-Generation Sequencing (NGS) data packages. The NGS ... by ensuring the integrity of the gene, validation of ...
(Date:1/22/2015)... , Jan. 22. 2015  Varian Medical Systems (NYSE: ... been honored for its commitment to sustainability with inclusion on ... is the highest ranked healthcare equipment company among the Corporate ... the World Economic Forum at Davos, Switzerland ...
(Date:12/24/2014)... Md. , Dec. 24, 2014  United Therapeutics Corporation ... Inc. (NYSE: MDT ) has submitted a ... Administration (FDA) for the use of Medtronic,s SynchroMed ® ... developed catheter) for use with United Therapeutics, Remodulin ® ...
Breaking Biology Technology:Eppendorf Announces Promotional Bundle Which Includes: Eppendorf Centrifuge 5424, 3-Pack of Pipettes, and Tips - Available Now at Pipette.com 2Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2Varian Honored Among World's 100 Most Sustainable Corporations 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 3United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 4
... Dec. 4 An independent panel of scientists,has ... Safe) status for its patented probiotic, GanedenBC30 (Bacillus ... research studies and,toxicology data, the panel concluded that ... food products. According to the FDA, self-affirmed GRAS,status ...
... a leader in integrated,manufacturing operations solutions, announced ... the 2007 top technologies by START-IT., ... START-IT magazine, recognizes,highly- functional products that provide ... was one of 50 products,selected from several ...
... CITY, Calif., Dec. 4 Maxygen, Inc.,(Nasdaq: ... development of,improved protein drugs, announced today the license ... pasteur, the vaccines division of,the sanofi-aventis Group., ... transfer to sanofi,pasteur a portfolio of preclinical dengue ...
Cached Biology Technology:Ganeden Biotech Obtains Self-Affirmed GRAS Status for Probiotic Ingredient, GanedenBC30 (Bacillus coagulans GBI-30, 6086) 2Visiprise Manufacturing Wins START-IT Top 50 Technologies Award 2Maxygen Licenses Dengue Vaccine Technology to sanofi pasteur 2Maxygen Licenses Dengue Vaccine Technology to sanofi pasteur 3
Ps-Aeruginosa (IgG) -Ab EIA Sample Size: 100 l...
...
Automated -80° C sample library for microplates and cryotube racks in SBS format; for integration into automated processes....
... FROM MOISTURE. AVOID FREEZE/THAW CYCLES. This kit ... in vitro by DNA affinity-mediated capture ... detection. In this assay, mono- and oligonucleosomes ... Anti-Histone 3 (H3) biotin-labeled antibody then binds ...
Biology Products: