Featured Research

from universities, journals, and other organizations

Biodiversity in decline: Effects of environmental stress on water organisms

Date:
May 7, 2014
Source:
Ruhr-Universitaet-Bochum
Summary:
Biodiversity on Earth is in rapid decline, and flowing waters are particularly affected. A team of biologists analyses which environmental influences affect water organisms the most. They are the first to look into the combinations of different stress factors. Based on the results, the researchers put forward suggestions for the protection of biodiversity. According to project leader, it is high time to do something for the preservation of biodiversity.

Dr Florian Leese (2nd from the right), "GeneStream" project leader, studies the biodiversity of German water bodies and campaigns for the preservation of biodiversity.
Credit: © RUBIN, photo: Nelle

Biodiversity on Earth is in rapid decline, and flowing waters are particularly affected. A team of biologists at the Ruhr-Universitδt Bochum (RUB), headed by Dr Florian Leese, analyses which environmental influences affect water organisms the most. They are the first ones to look into the combinations of different stress factors. Based on the results, the researchers put forward suggestions for the protection of biodiversity. According to project leader Florian Leese, it is high time to do something for the preservation of biodiversity.

Related Articles


Stress factors: nutrients, sediment supply and reduced flow velocity

From the Breitenbach stream in Hesse, the researchers siphoned off water with the organisms that live in it into containers. They subjected those containers to a certain stress factor or a combination of several stress factors. The team measured the impact of increased nutrient supply, sediment delivery and reduced flow velocity. All three stress factors had a negative impact on most of the species. In combination, the harmful effect became particularly pronounced: "The more stressors we added to the experiment, the stronger the organisms' stress reaction," concludes Florian Leese. "Sometimes, stressor one and stressor two put together will not merely be twice as bad, but rather three, four or eight times as bad."

Genetic level provides additional information

The "GeneStream" team is currently setting up a series of tests at the Felderbach stream in the Elfringhauser Schweiz region. In this experiment, the researchers additionally analyse the organisms' genetic makeup. In the rapidly changing environment, only those species can survive in the long term that are particularly adaptable; and adaptable are those species that have a high genetic diversity. "It's the same as with the polar bear," compares Florian Leese. "Just because there are currently still many individuals of a species left, it does not mean that the species will be able to survive in the long term."

Less than five per cent near natural flowing waters in NRW

"In NRW, less than five per cent of all flowing waters are more or less near natural; more than 60 per cent have been completely reshaped by humans," says Leese. Under the Water Framework Directive, the EU member states have committed themselves to achieve good chemical and ecological status of all surface waters by 2027. "We are lagging far behind this ambitious schedule. Dovetailing basic research and water management is crucial," continues the Bochum scientist.


Story Source:

The above story is based on materials provided by Ruhr-Universitaet-Bochum. The original article was written by Julia Weiler. Note: Materials may be edited for content and length.


Cite This Page:

Ruhr-Universitaet-Bochum. "Biodiversity in decline: Effects of environmental stress on water organisms." ScienceDaily. ScienceDaily, 7 May 2014. <www.sciencedaily.com/releases/2014/05/140507095754.htm>.
Ruhr-Universitaet-Bochum. (2014, May 7). Biodiversity in decline: Effects of environmental stress on water organisms. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2014/05/140507095754.htm
Ruhr-Universitaet-Bochum. "Biodiversity in decline: Effects of environmental stress on water organisms." ScienceDaily. www.sciencedaily.com/releases/2014/05/140507095754.htm (accessed October 24, 2014).

Share This



More Plants & Animals News

Friday, October 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) — Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) — One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Breakfast Debate: To Eat Or Not To Eat?

Breakfast Debate: To Eat Or Not To Eat?

Newsy (Oct. 23, 2014) — Conflicting studies published in the same week re-ignited the debate over whether we should be eating breakfast. Video provided by Newsy
Powered by NewsLook.com
Weird-Looking Dinosaur Solves 50-Year-Old Mystery

Weird-Looking Dinosaur Solves 50-Year-Old Mystery

Newsy (Oct. 23, 2014) — You've probably seen some weird-looking dinosaurs, but have you ever seen one this weird? It's worth a look. Video provided by Newsy
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