Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The petroleum umbrella

04.04.2005


Several companies are extracting black gold – petroleum - from the North Sea. But scientists are questioning this activity and asking if this activity has environmental consequences. By law, these companies are obliged to carry out annual analyses.



At the request of the companies, a number of researchers at the Science Faculty of the University of the Basque Country have analysed what type of contaminants are released as a result of extraction of crude oil in the North Sea and how these contaminants affect living things in this marine environment.

For this research, mussels were studied. Throughout the world, these invertebrates are often used for investigating the state of the coastline and, so, there is a lot of information on the effects generated by the contaminants. This is why, although these molluscs are not inhabitants of this marine environment, they are regularly used for analysing the environment health status at the open sea.


Network of cages

A number of cages are submerged at high sea and then are distributed around the oil platforms, normally in two opposite directions.

The first cages are positioned close to the platform, at some 500 metres for example; the next set are placed somewhat further away – at 1000 metres distance and, finally, the third group of cages are located at quite a distance – 10,000 metres from the platform.

After 4 to 6 weeks, analyses are carried out measuring biomarkers in the mussels. Biomarkers indicate the degree of response to environmental insult at cellular and molecular levels - early warning signals of the effects of pollution in the ocean.

Amongst other parameters, the mussels are analysed to determine whether they have accumulated metals or hydrocarbons, whether they are stressed, have the immune system weakened, have suffered damage in the reproductive system, abnormalities occur in subsequent generations, and so on. Nevertheless, the actual endponit of these studies is not to determine the health state of the mussels – these molluscs are used as sentinels of the situation of the marine ecosystem. Moreover, given the complexity of the ecosystem in the North Sea, herring and cod fish have also been used in the research.

Umbrella effect

According to the results obtained from the measurements, it is still too early to determine the effect of the platforms on the mussels. Nevertheless, the researchers have been able to demonstrate that those mussels installed close to the platforms are hardly affected and, in fact, the influence of the oil platform is more noticeable at a certain distance. This means that the pollutants discharged during the crude oil extraction are dispersed from deep waters in the form of an open and inverted umbrella.

But that is not all. Frequently, the cages installed on one side of the oil platform do not register the same effects than those on the other side, although they are located at the same distance from the rig. This might due to the fact that the currents displace the “umbrella” from the platform axis at the ocean bottom.

Anyway, the investigators say the research has to be confirmed in order to draw definitive conclusions. Above all, further parameters have to be taken into account and monitoring over a longer period of time has to be undertaken. Furthermore, the North Sea is not the easiest zone for this study given the fact that the high seas make the work of the scientists difficult.

Garazi Andonegi | EurekAlert!
Further information:
http://www.ehu.es
http://www.elhuyar.com

More articles from Ecology, The Environment and Conservation:

nachricht Despite government claims, orangutan populations have not increased. Call for better monitoring
06.11.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig

nachricht Increasing frequency of ocean storms could alter kelp forest ecosystems
30.10.2018 | University of Virginia

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

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

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

Im Focus: Coping with errors in the quantum age

Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly

The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

 
Latest News

The dawn of a new era for genebanks - molecular characterisation of an entire genebank collection

13.11.2018 | Life Sciences

Fish recognize their prey by electric colors

13.11.2018 | Life Sciences

Ultrasound Connects

13.11.2018 | Awards Funding

VideoLinks
Science & Research
Overview of more VideoLinks >>>