Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Desert dust enables algae to grow

22.12.2003


Biologists from the Royal Netherlands Institute for Sea Research have demonstrated that desert dust promotes the growth of algae. Scientists had already assumed that the iron in desert dust stimulated algal growth, but this has now been demonstrated for the first time. The researchers have published their findings in the December issue of the Journal of Phycology.




The biologists cultured two species of diatoms in seawater originating from the iron-depleted Southern Ocean, the sea around the South Pole. The algae were supplied with dust from a desert in Mauritania and a desert in Namibia. The growth of algae which received a lot of dust was compared with that of algae which received little or no dust.

Algae that received desert dust grew considerably better than algae which did not. The researchers also discovered that algae grew less well on desert dust from Mauritania than desert dust from Namibia.


As well as establishing how much iron the dust contained, the researchers also discovered that the algae could only utilise a limited part of the dissolved iron. This was established by culturing the algae in seawater without dust, but with different concentrations of dissolved iron. The researchers could then compare the growth of the algae that received a known quantity of iron with that of the algae which grew on dust.

The researchers will use the laboratory results to predict how algae in the ocean respond to desert dust. The data obtained from these predictions will contribute to knowledge about the further development of the greenhouse effect, because algae absorb the greenhouse gas carbon dioxide and in so doing slow down the warming up of the Earth.

For further information please contact Dr Klaas Timmermans (Royal Netherlands Institute for Sea Research), tel. +31 (0)222 369494, fax +31 (0)222 319674, e-mail: klaas@nioz.nl.

The complete study will be published in the Journal of Phycology, December 2003, Volume 39 (6), under the title: The role of the reactivity and the content of iron of aerosol dust on growth rates of two Antarctic diatom species. F. Visser, L.J.A. Gerringa, S.J. Van der Gaast, H.J.W. de Baar, K.R. Timmermans.
Image available at www.nwo.nl/news.

The research was funded by the Netherlands Organisation for Scientific Research, the EU and the Royal Netherlands Institute for Sea Research.

Sonja Jacobs | NWO
Further information:
http://www.nwo.nl

More articles from Life Sciences:

nachricht A Map of the Cell’s Power Station
18.08.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau

nachricht On the way to developing a new active ingredient against chronic infections
18.08.2017 | Deutsches Zentrum für Infektionsforschung

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

A Map of the Cell’s Power Station

18.08.2017 | Life Sciences

Engineering team images tiny quasicrystals as they form

18.08.2017 | Physics and Astronomy

Researchers printed graphene-like materials with inkjet

18.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>