Navigation Links
Ocean stirring and plankton patchiness
Date:6/21/2010

Computer simulations performed by researchers at the National Oceanography Centre and the University of Glasgow show how oceanic stirring and mixing influence the formation and dynamics of plankton patches in the upper ocean.

Tiny free-floating marine plants called phytoplankton live in vast numbers in the sunlit upper ocean. Through the process of photosynthesis, they build carbon compounds such as sugars starting with just water and carbon dioxide, which is thereby drawn down from the atmosphere.

Phytoplankton also need nutrients such as phosphate and iron, shortage of which can limit their population growth. They are also preyed upon by tiny planktonic animals called zooplankton.

"Interactions between phytoplankton, nutrients, zooplankton and the physical environment lead to complex dynamics, which we seek to understand using computer models," explained Emma Guirey, whose work on the problem was done as part of her PhD studies. "These complex dynamics can produce the patchiness of phytoplankton at the ocean surface that is invariably seen in satellite images and observed at sea during research cruises."

Guirey and her colleagues applied the methods of synchronisation theory previously used to explain such phenomena as the co-ordinated flashing of fireflies along whole riverbanks. Initially they studied the balance between localised increases in phytoplankton populations and small-scale mixing, such as that due to breaking waves, in creating patches. Patchiness was found to persist despite the mixing which might be expected to smooth out the patches by blending them together.

The initial studies neglected the effects of stirring, or 'advection' by large scale ocean currents such as the Gulf Stream and Kuroshio, but this is included in the most recent computer simulations. This stirring stretches the patches out into long filaments. However, the patches still resist dispersal.

"What is exciting is that the inclusion of large-scale advection, far from disrupting plankton patchiness, actually creates the kind of filamentary structure that we often observe in real-life plankton populations. Application of synchronisation theory has given us a new perspective on the production of this complex patchiness," said Guirey.


'/>"/>

Contact: Dr. Rory Howlett
r.howlett@noc.soton.ac.uk
44-080-598-490
National Oceanography Centre, Southampton (UK)
Source:Eurekalert  

Related biology news :

1. TAU scientists probe deep questions aboard EcoOceans environmental research ship
2. NASA celebrates a decade observing climate impacts on health of worlds oceans
3. CO2 emissions could violate EPA ocean-quality standards within decades
4. NASA celebrates a decade observing climate impacts on health of worlds oceans
5. Scientists, policymakers and industry leaders gather to discuss ocean iron fertilization
6. Acid oceans warning
7. Scientists gather in New Zealand to share oceans secrets
8. Unprecedented global measurement network achieves full coverage of oceans
9. Abel to receive posthumous Ocean and Coastal Leadership award
10. Human safety, prosperity depend on better ocean observing system: Scientists
11. Marine scientists warn human safety, prosperity depend on better ocean observing system
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ocean stirring and plankton patchiness
(Date:4/19/2016)... , UAE, April 20, 2016 ... be implemented as a compact web-based "all-in-one" system solution ... the biometric fingerprint reader or the door interface with ... of modern access control systems. The minimal dimensions of ... ID readers into the building installations offer considerable freedom ...
(Date:4/13/2016)...  IMPOWER physicians supporting Medicaid patients in ... standard in telehealth thanks to a new partnership with ... IMPOWER patients can routinely track key health measurements, such ... and, when they opt in, share them with IMPOWER ... local retail location at no cost. By leveraging this ...
(Date:3/23/2016)... Massachusetts , March 23, 2016 /PRNewswire/ ... im Interesse erhöhter Sicherheit Gesichts- und Stimmerkennung ... Xura, Inc. (NASDAQ: MESG ), ... bekannt, dass das Unternehmen mit SpeechPro zusammenarbeitet, ... aus der Finanzdienstleistungsbranche, wird die Möglichkeit angeboten, ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... -- The Prostate Cancer Foundation (PCF) is pleased to announce 24 new ... prostate cancer. Members of the Class of 2016 were selected from a pool ... Read More About the Class of 2016 PCF Young Investigators ... ... ...
(Date:6/23/2016)... , June 23, 2016   EpiBiome , a ... $1 million in debt financing from Silicon Valley Bank ... automation and to advance its drug development efforts, as ... facility. "SVB has been an incredible strategic ... services a traditional bank would provide," said Dr. ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... STACS DNA ... Technical Leader at the Arkansas State Crime Laboratory, has joined STACS DNA as a ... STACS DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further ...
(Date:6/23/2016)... , June 23, 2016 Apellis ... Phase 1 clinical trials of its complement C3 ... single and multiple ascending dose studies designed to ... (PD) of subcutaneous injection in healthy adult volunteers. ... (SC) either as a single dose (ranging from ...
Breaking Biology Technology: