Navigation Links
Study of oceans' past raises worries about their future
Date:6/14/2013

The ocean the Titanic sailed through just over 100 years ago was very different from the one we swim in today. Global warming is increasing ocean temperatures and harming marine food webs. Nitrogen run-off from fertilizers is causing coastal dead zones. A McGill-led international research team has now completed the first global study of changes that occurred in a crucial component of ocean chemistry, the nitrogen cycle, at the end of the last ice age. The results of their study confirm that oceans are good at balancing the nitrogen cycle on a global scale. But the data also shows that it is a slow process that may take many centuries, or even millennia, raising worries about the effects of the scale and speed of current changes in the ocean.

"For the first time we can quantify how oceans responded to slow, natural climate warming as the world emerged from the last ice age," says Prof. Eric Galbraith from McGill University's Department of Earth and Oceanic Sciences, who led the study. "And what is clear is that there is a strong climate sensitivity in the ocean nitrogen cycle."

The nitrogen cycle is a key component of the global ocean metabolism. Like the proteins that are essential to human health, nitrogen is crucial to the health of oceans. And just as proteins are carried by the blood and circulate through the body, the nitrogen in the ocean is kept in balance by marine bacteria through a complicated cycle that keeps the ocean healthy. The phytoplankton (microscopic organisms at the base of the food chain) 'fix' nitrogen in the shallow, sunlit waters of the ocean, and then as they die and sink, nitrogen is eliminated (a process known as 'denitrification') in dark, oxygen-poor pockets of the ocean depths.

Using sediment gathered from the ocean floor in different areas of the world, the researchers were able to confirm that as the ice sheets started melting and the climate warmed up at the end of the last ice age, 18,000 years ago,
'/>"/>

Contact: katherine gombay
katherine.gombay@mcgill.ca
514-398-2189
McGill University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Study helps managers identify regions with multiple threat potential, including wildfires
2. Dads life stress exposure can affect offspring brain development, Penn Study finds
3. NIH awards UCI $10 million to study early-life origins of adolescent mental disorders
4. New Loyola study on hepatitis C virus entry factor
5. Biofuels will play integral role in Californias energy future, says new EBI study
6. New study proposes solution to long-running debate as to how stable the Earth system is
7. Study finds disincentives to energy efficiency can be fixed
8. Study finds taking probiotics has benefits for patients in hospitals
9. New study explains cognitive ability differences among the elderly
10. Oncologists are stressed and have difficulty discussing death with patients -- Ben-Gurion U. study
11. Stem cell study could aid quest to combat range of diseases
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/10/2014)... , Dec. 08, 2014 Research and Markets ... addition of the "Biometrics Market in Japan ... http://photos.prnewswire.com/prnh/20130307/600769 The ... such as rural banking and upgradation of the ... witnessed in the market. Besides the aforementioned projects, ...
(Date:12/5/2014)... 4, 2014 Increased emphasis on product ... new testing and inspection technologies. The convergence of ... a range of innovative test solutions. This trend ... Y, which is generally more inclined towards communication, ... development strategies of test equipment vendors will cater ...
(Date:12/4/2014)... BEACH GARDENS, Fla. , Dec. 3, 2014 ... management solutions, today announced that its DigitalPersona ® ... 4500 fingerprint readers have been deployed throughout First ... , South Carolina ... headquartered in Southern Pines, North Carolina ...
Breaking Biology News(10 mins):Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3
... collaboration with the University of California at San Diego (UCSD) ... some aspects of gastropod (snails and slugs) locomotion to basically ... depend on the physical properties of their mucus to propel ... mechanism to the construction of biomimetic robots. "The aim ...
... to be only a structural support protein in the microenvironment ... cross-like shape. However, laminin is far more than ... led by one of the world,s foremost breast cancer scientists ... development of breast cancer, ,the second most common cancer and ...
... and the German Cancer Research Centre (DKFZ), both in ... the combined effects of genes. Published online today in ... genes can amplify, cancel out or mask each others, ... with each other in much the same manner that ...
Cached Biology News:A study reveals the keys to the locomotion of snails 2A study reveals the keys to the locomotion of snails 3Berkeley Lab researchers illuminate laminin's role in cancer formation 2Berkeley Lab researchers illuminate laminin's role in cancer formation 3Berkeley Lab researchers illuminate laminin's role in cancer formation 4Berkeley Lab researchers illuminate laminin's role in cancer formation 5Suggesting genes' friends, Facebook-style 2
(Date:12/22/2014)... , Dec. 22, 2014 GenomeDx Biosciences today ... Prostate Cancer Classifier, a genomic test for prostate cancer, ... high-risk men managed by radical prostatectomy without adjuvant therapy. ... is relatively uncommon, using tumor genomics to identify these ... disease is an important advance. The study has been ...
(Date:12/22/2014)... December 22, 2014 The ... publication of original research, reviews and editorials addressing ... clinical practice, today published a provocative article exploring ... development, progression and potential treatment of prostate cancer. ... research and proposes the possibility that there could ...
(Date:12/22/2014)... TENN (PRWEB) December 22, 2014 Fertility ... Donor Egg Bank USA , a network of ... country. Through this partnership, patients have fast access to ... in vitro fertilization, IVF . Fertility Associates of Memphis ... offer this fertility treatment option. , Dr. William ...
(Date:12/19/2014)... (PRWEB) December 19, 2014 Charm Sciences ... test for the Detection of Aflatoxin M1 in raw ... receive independent third party validation. The peer reviewed report ... of the Institute for Agricultural and Fisheries Research (ILVO-T&V) ... , Aflatoxin B1, the most toxic aflatoxin and ...
Breaking Biology Technology:Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 2Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 3Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 2Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 3Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 4Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3Charm Sciences Achieves Independent Validation of First 15 Minute Quantitative Screening Method for Aflatoxin M1 2
... University and United States Army scientists have found that ... can be made to produce brilliant light best suited ... Henry Everitt, chemistry professor Jie Liu and their graduate ... ultra-fine powders of commonplace zinc oxide at about 1,000 ...
... test their knowledge at www.synbioproject.org , ... Esquire magazine recently chose as the most influential in ... combines science and engineering in order to design and build novel ... , , The promise of this ...
... Once thought of as,a technology used only for ... CUDA(TM) technology are now being used for the,serious ... Network Computing (BOINC), one of the leading distributed ... to tap the massively parallel,processing power of NVIDIA ...
Cached Biology Technology:Duke researchers coax bright white light from unexpected source 2Duke researchers coax bright white light from unexpected source 3Synthetic Biology Importance in the 21st Century 2Synthetic Biology Importance in the 21st Century 3NVIDIA CUDA Technology Dramatically Advances the Pace of Scientific Research 2NVIDIA CUDA Technology Dramatically Advances the Pace of Scientific Research 3NVIDIA CUDA Technology Dramatically Advances the Pace of Scientific Research 4NVIDIA CUDA Technology Dramatically Advances the Pace of Scientific Research 5NVIDIA CUDA Technology Dramatically Advances the Pace of Scientific Research 6
SCP-1 (P-17)...
Rabbit polyclonal to Kallikrein 1 ( Abpromise for all tested applications). Antigen: Full length native kallikrein from tissue (Human) Entrez Gene ID: 3816 Swiss Protein ID: P06870...
PSGL-1 (215)...
Mouse Anti-human CD11b/Mac-1alpha, clone LM2/1, Monoclonal Antibody...
Biology Products: