Navigation Links
Bacterioplankton responses to desert dust in the (sub)tropical northeast Atlantic
Date:6/2/2010

Inputs of dust from the Sahara desert could change the composition of microbial communities in the (sub)tropical eastern North Atlantic say Southampton researchers writing this month in the journal FEMS Microbiology Letters.

When high winds blow over the Sahara, dust particles consisting of soil particles are lifted high into the atmosphere, blown over the sea, and then deposited on the ocean surface.

"Desert dust particles contain nutrients such as iron that can boost the production of tiny planktonic plants called phytoplankton as well as bacteria in some oceanic regions," explained researcher Polly Hill, a PhD student at the University of Southampton's School of Ocean and Earth Science (SOES) based at the National Oceanography Centre (NOC) in Southampton.

The new research was conducted aboard the Royal Research Ship Discovery in the eastern (sub)tropical North Atlantic Ocean during JanuaryFebruary 2008.

"During the voyage a huge cloud of Saharan dust came over, turning the sky brown and covering the ship in a layer of red-brown dust. The dust cloud was clearly visible in satellite images," recalled Hill.

Hill and her colleagues Mike Zubkov and Duncan Purdie experimentally assessed the affect of oceanic dust deposition on the metabolic activity of marine bacteria (bacterioplankton) contained in seawater samples collected at a depth of 20 metres. They focused on two types of bacteria, Prochlorococcus and SAR11.

"Prochlorococcus bacteria are the dominant phytoplankton group in the subtropical and tropical ocean and are responsible for a large proportion of carbon dioxide fixation in those regions. Conversely, SAR11 bacteria respire organic carbon and release carbon dioxide," said Hill.

The researchers' experiments aboard ship showed that dust inputs generally advantaged SAR11 over Prochlorococcus, for which these inputs may even be detrimental.

"This means that large inputs of Saharan dust has the potential to change the composition of the bacterioplankton community in the (sub)tropical North Atlantic, as has been shown previously for some other oceanic regions," concluded Hill.


'/>"/>

Contact: Dr Rory Howlett
r.howlett@noc.soton.ac.uk
0238-059-8490
National Oceanography Centre, Southampton (UK)
Source:Eurekalert  

Related biology news :

1. Doctors learn to control their own brains pain responses to better treat patients
2. Israeli scientists identify: Genes that affect responses of multiple sclerosis patients to copaxone
3. The precise role of seminal proteins in sustaining post-mating responses in fruit flies
4. Fly studies reveal immune cell responses to tumor and tissue damage
5. RNA molecules, delivery system improve vaccine responses, effectiveness
6. NIAID funds studies of how SARS and bird flu evade antiviral responses
7. Slight changes in climate may trigger abrupt ecosystem responses
8. Time series identify population responses to climate change
9. Scientists study possible responses to climate emergencies
10. National Science Foundation funds systems biology study of crop drought responses
11. Scent of a woman: Mens testosterone responses to olfactory ovulation cues
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Bacterioplankton responses to desert dust in the (sub)tropical northeast Atlantic
(Date:3/30/2017)... ANGELES , March 30, 2017  On April ... Hack the Genome hackathon at Microsoft,s ... exciting two-day competition will focus on developing health and ... Hack the Genome is the ... been tremendous. The world,s largest companies in the genomics, ...
(Date:3/29/2017)... 29, 2017  higi, the health IT company that ... North America , today announced a Series B ... of EveryMove. The new investment and acquisition accelerates higi,s ... to transform population health activities through the collection and ... higi collects and secures data today on behalf ...
(Date:3/24/2017)... , March 24, 2017 The Controller General of ... Mr. Abdulla Algeen have received the prestigious international IAIR Award ... Continue Reading ... ... and Deputy Controller Abdulla Algeen (small picture on the right) have received ...
Breaking Biology News(10 mins):
(Date:9/22/2017)... ... September 22, 2017 , ... The effectiveness of ... assessed in clinical trials in the United States. (clinicaltrials.gov : NCT02973893) , To ... physician or find your nearest participating clinic here https://factor-therapeutics.com/clinical-trials/ and discuss ...
(Date:9/21/2017)... ... 21, 2017 , ... The 3rd World Congress on Biostimulants ... knowledge on these products, which are increasingly used in crop production around the ... on Plant Nutrition, Abiotic Stresses, Plant Growth and Development, as well as the ...
(Date:9/21/2017)... ... September 21, 2017 , ... ... research sector professionals, has announced the addition of 5 new courses to its ... - Compliance with Regulation 21 CFR Part 11 on Electronic Records and Electronic ...
(Date:9/21/2017)... ... 21, 2017 , ... Biorez, Inc. , a regenerative ... Entrepreneur in Residence at Medtronic, Inc., to serve as an Independent Director on ... for anterior cruciate ligament (ACL) reconstruction that is designed to stabilize the knee ...
Breaking Biology Technology: