Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Eutrophication affects diversity of algae

20.10.2009
Eutrophication of the seas may have an impact on genetic variation in algae, research at the University of Gothenburg shows.

Phytoplankton provide the basis for the whole marine food chain. These microscopic organisms are common in coastal areas, all the way from the polar regions to the Equator, and multiply through cell division.

If cells are present in the water mass in large numbers an algal blood develops - a recurrent problem in Swedish seas and along Swedish coasts.

Causes of algal blooms
Researchers at the Department of Marine Ecology of the University of Gothenburg have long been interested in the development and causes of algal blooms. The doctoral student Karolina Härnström has focused in her thesis on diatoms, which are the largest single group of phytoplankton, and their occurrence in the eutrophicated Mariager Fjord in Jutland. The results show that different populations of a diatom species may have different growth and adaptability characteristics, and that the genetic variation of the algae may possibly be affected by eutrophication: the researchers found different types of populations during periods of heavy eutrophication in Mariager Fjord.
Little is known
"We know surprisingly little about the ecology of diatoms, about where the cells that give rise to blooms come from and whether it is the same populations that recurrently bloom in a particular location or whether it differs between seasons. My research may contribute to answering these questions, and perhaps increase knowledge of how algal blooms are affected by environmental changes and how the population dynamics of these algae appears in a microevolutionary perspective," says Härnström.
The thesis Bloom dynamics and population genetics of marine phytoplankton - Community, species and population aspects was successfully defended on 25 September.

Link to thesis: http://gupea.ub.gu.se/dspace/handle/2077/20913

Contact:
Karolina Härnström, Department of Marine Ecology, University of Gothenburg
+46 31-786 26 29
+46 73-0439247
karolina.harnstrom@marecol.gu.se
Facts:
Phytoplankton are very important to the vital process of photosynthesis and in binding the earth's carbon dioxide. Diatoms are the largest single group of phytoplankton. Diatoms can form blooms in a very short time and have the ability to grow in relatively little light, putting them at an advantage over other types of phytoplankton, particularly in temperate regions where the level of sunlight during darker parts of the year may limit growth.

Helena Aaberg | idw
Further information:
http://gupea.ub.gu.se/dspace/handle/2077/20913
http://www.gu.se

More articles from Life Sciences:

nachricht Water forms 'spine of hydration' around DNA, group finds
26.05.2017 | Cornell University

nachricht How herpesviruses win the footrace against the immune system
26.05.2017 | Helmholtz-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: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>