Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Constructed wetlands save frogs and birds threatened with extinction

21.01.2014
Over the last few decades, several thousands of wetlands have been constructed in Sweden in agricultural landscapes.

The primary reason is that the wetlands prevent a surfeit of nutrients from reaching our oceans and lakes. A study from Halmstad University shows, in addition, that wetlands have contributed to saving several frog and bird species from the “Red List”–a list that shows which species are at risk of dying out in Sweden.

In the latest update, five of the nine red-listed bird species that breed in wetlands–including the little grebe and the little ringed plover–could be taken off the list. Yet another bird species was moved to a lower threat category. As regards batrachians, four species–among them the European tree frog–have been taken off the list, and two species have been moved to a lower threat category.

Great effect on biological diversity
“An important objective in constructing wetlands is reducing eutrophication – over-fertilisation. It’s surprisingly positive that they’ve also had such a great direct effect on biological diversity,” says Stefan Weisner, Professor of Biology specialising in environmental science at Halmstad University.

During the 19th and 20th centuries, the amount of wetlands in Sweden decreased drastically: almost all original wetlands in agricultural areas have disappeared through drainage and land reclamation. This has affected many of the plants and animals that depend on these types of environments.

An inexpensive way to reduce eutrophication
Over the last 15 years, nearly 3,000 wetland areas have been constructed in agricultural landscapes around Sweden. Farmers have the possibility of receiving economic support for this from sources such as the Swedish Board of Agriculture. The primary reason is because wetlands catch the surfeit of nutrients from agriculture such as nitrogen and phosphorus–substances that would otherwise have leaked out into the seas and lakes and contributed to eutrophication.

The study shows that creation of wetlands is a cost-effective to catch the nutrients.

“It’s a very effective way of purifying the water. It’s less expensive than constructing treatment plants, and in addition it contributes to biological diversity,” Prof Weisner says.

The research study, which is a compilation of previous studies in the field, was written by Stefan Weisner of Halmstad University and John Strand of the Agricultural Society of Halland, and has been published in Ecological Engineering.

For more information, contact Stefan Weisner, Professor of Biology specialising in environmental science at Halmstad University, tel. 035-16 73 48, e-mail: stefan.weisner@hh.se.

Pressofficer Lena Lundén, +46-73 241 74 43, lena.lunden@hh.se

"Effects of wetland construction on nitrogen transport and species richness in the agricultural landscape – experiences from Sweden"
John. A. Strand & Stefan E.B. Weisner
http://dx.doi.org/10.1016/j.ecoleng.2012.12.087
Weitere Informationen:
http://www.deepdyve.com/lp/elsevier/effects-of-wetland-construction-on-nitrogen-transport-and-species-9la77zy8mg?articleList=%2Fsearch%3Fquery%3DWeisner

link to Report

http://www.hh.se/4.70cf2e49129168da015800010489.html
Wetland Research Centre Halmstad University

Lena Lundén | idw
Further information:
http://www.vr.se

More articles from Ecology, The Environment and Conservation:

nachricht Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel

nachricht Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)

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: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Research reveals how order first appears in liquid crystals

23.05.2018 | Life Sciences

Space-like gravity weakens biochemical signals in muscle formation

23.05.2018 | Life Sciences

NIST puts the optical microscope under the microscope to achieve atomic accuracy

23.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>