Featured Research

from universities, journals, and other organizations

Constructed wetlands save frogs, birds threatened with extinction

Date:
January 21, 2014
Source:
Expertsvar
Summary:
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 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.

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.

Related Articles


Great effect on biological diversity

"An important objective in constructing wetlands is reducing eutrophication -- over-fertilization. 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.


Story Source:

The above story is based on materials provided by Expertsvar. Note: Materials may be edited for content and length.


Journal Reference:

  1. John A. Strand, Stefan E.B. Weisner. Effects of wetland construction on nitrogen transport and species richness in the agricultural landscape—Experiences from Sweden. Ecological Engineering, 2013; 56: 14 DOI: 10.1016/j.ecoleng.2012.12.087

Cite This Page:

Expertsvar. "Constructed wetlands save frogs, birds threatened with extinction." ScienceDaily. ScienceDaily, 21 January 2014. <www.sciencedaily.com/releases/2014/01/140121092911.htm>.
Expertsvar. (2014, January 21). Constructed wetlands save frogs, birds threatened with extinction. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2014/01/140121092911.htm
Expertsvar. "Constructed wetlands save frogs, birds threatened with extinction." ScienceDaily. www.sciencedaily.com/releases/2014/01/140121092911.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Christmas Kissing Good for Health

Christmas Kissing Good for Health

Reuters - Innovations Video Online (Dec. 22, 2014) Scientists in Amsterdam say couples transfer tens of millions of microbes when they kiss, encouraging healthy exposure to bacteria. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Brain-Dwelling Tapeworm Reveals Genetic Secrets

Brain-Dwelling Tapeworm Reveals Genetic Secrets

Reuters - Innovations Video Online (Dec. 22, 2014) Cambridge scientists have unravelled the genetic code of a rare tapeworm that lived inside a patient's brain for at least four year. Researchers hope it will present new opportunities to diagnose and treat this invasive parasite. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins