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:4/28/2016)... , April 28, 2016 First quarter ... (139.9), up 966% compared with the first quarter of 2015 ... totaled SEK 589.1 M (loss: 18.8) and the operating margin was ... (loss: 0.32) Cash flow from operations was SEK 249.9 ... 2016 revenue guidance is unchanged, SEK 7,000-8,500 M. The ...
(Date:4/26/2016)... , April 27, 2016 ... "Global Multi-modal Biometrics Market 2016-2020"  report to their ... , The analysts forecast the global ... of 15.49% during the period 2016-2020.  ... of sectors such as the healthcare, BFSI, transportation, ...
(Date:4/15/2016)... CHICAGO , April 15, 2016  A ... companies make more accurate underwriting decisions in a ... offering timely, competitively priced and high-value life insurance ... health screenings. With Force Diagnostics, rapid ... and lifestyle data readings (blood pressure, weight, pulse, ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... , April 29, 2016 ... Transparency Market Research "Separation Systems for Commercial Biotechnology ... Trends, and Forecast 2015 - 2023", the separation ... US$ 10,665.5 Mn in 2014 and is projected ... 2015 to 2023 to reach US$ 19,227.8 Mn ...
(Date:4/28/2016)... The report "Cryocooler Market by ... (Technical Support, Product Repairs & Refurbishment, Preventive Maintenance, and ... 2022", published by MarketsandMarkets, the global market is expected ... a CAGR of 7.29% between 2016 and 2022. ... Figures spread through 159 Pages and in-depth TOC on ...
(Date:4/28/2016)... Connecticut (PRWEB) , ... April 28, 2016 , ... ... Group, Inc., will hold an open house for regional manufacturers at its Maple ... displays from Tsugami, Okuma, Hardinge Group, Chiron and Trumpf. Almost 20 leading ...
(Date:4/27/2016)... VANCOUVER, British Columbia , April 27, 2016 ... "Gesellschaft" oder "NanoStruck") (CSE: NSK) (OTCPink: NSKQB) ( ... sie im Anschluss an ihre Pressemitteilung vom 13. ... Inc. erhalten hat, ihre Finanzen um zusätzliche 200.000.000 ... auf 4.000.000 Kanadische Dollar zu bringen. Davon wurden ...
Breaking Biology Technology: