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:4/11/2017)... April 11, 2017 NXT-ID, Inc. (NASDAQ: ... company, announces the appointment of independent Directors Mr. Robin ... its Board of Directors, furthering the company,s corporate governance and ... Gino Pereira ... look forward to their guidance and benefiting from their considerable ...
(Date:4/5/2017)...  The Allen Institute for Cell Science today announces ... portal and dynamic digital window into the human cell. ... application of deep learning to create predictive models of ... a growing suite of powerful tools. The Allen Cell ... publicly available resources created and shared by the Allen ...
(Date:4/5/2017)... -- KEY FINDINGS The global market for ... of 25.76% during the forecast period of 2017-2025. The ... the growth of the stem cell market. ... INSIGHTS The global stem cell market is segmented on ... stem cell market of the product is segmented into ...
Breaking Biology News(10 mins):
(Date:10/9/2017)... 9, 2017  BioTech Holdings announced today identification ... its ProCell stem cell therapy prevents limb loss ... Company, demonstrated that treatment with ProCell resulted in ... as compared to standard bone marrow stem cell ... in reduction of therapeutic effect.  ...
(Date:10/9/2017)... ... October 09, 2017 , ... The Giving Tree Wellness ... targeting the needs of consumers who are incorporating medical marijuana into their wellness ... Arizona. , As operators of two successful Valley dispensaries, The Giving Tree’s two ...
(Date:10/7/2017)... ... October 06, 2017 , ... ... launched its ProxiMeta™ Hi-C metagenome deconvolution product, featuring the first commercially available ... bioinformatics software to perform Hi-C metagenome deconvolution using their own facilities, supplementing ...
(Date:10/6/2017)... Washington, D.C. (PRWEB) , ... October 06, 2017 ... ... Cure) will host a lunch discussion and webinar on INSIGhT, the first-ever adaptive ... INSIGhT Principal Investigator, Dana-Farber Cancer Institute. The event is free and open to ...
Breaking Biology Technology: