Featured Research

from universities, journals, and other organizations

Ecosystems cope with stress more effectively the greater the biodiversity

Date:
September 5, 2012
Source:
University of Zurich
Summary:
Ecosystems with a high degree of biodiversity can cope with more stress, such as higher temperatures or increasing salt concentrations, than those with less biodiversity. They can also maintain their services for longer, as botanists and ecologists have discovered. Their study provides the first evidence of the relationship between stress intensity and ecosystem functioning.

Ecosystems with a high degree of biodiversity can cope with more stress, such as higher temperatures or increasing salt concentrations, than those with less biodiversity. They can also maintain their services for longer, as botanists and ecologists from the universities of Zurich and Göttingen have discovered. Their study provides the first evidence of the relationship between stress intensity and ecosystem functioning.

Higher average temperatures and increasing salt concentrations are stress factors that many ecosystems face today in the wake of climate change. However, do all ecosystems react to stress in the same way and what impact does stress have on ecosystem services, such as biomass production? Botanists and ecologists from the universities of Zurich and Göttingen demonstrate that a high level of biodiversity aids stress resistance.

Higher number of species leads to greater stress resistance

The scientists studied a total of 64 species of single-celled microalgae from the SAG Culture Collection of Algae in Göttingen. These are at the bottom of the food chain and absorb environmentally harmful CO2 via photosynthesis. "The more species of microalgae there are in a system, the more robust the system is under moderate stress compared to those with fewer species," says first author Bastian Steudel, explaining one of the results. Systems with a higher number of species can thus keep their biomass production stable for longer than those with less biodiversity.

In all, the researchers studied six different intensities of two stress gradients. In the case of very high intensities, the positive effects of biodiversity decreased or ceased altogether. However, increasing stress in systems with few species had a considerably more negative impact than in those with high biodiversity levels. "The study shows that a high degree of biodiversity under stress is especially important to maintain biomass production," says Steudel's PhD supervisor Michael Kessler, summing up the significance of the research project.


Story Source:

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


Journal Reference:

  1. Bastian Steudel, Andy Hector, Thomas Friedl, Christian Löfke, Maike Lorenz, Moritz Wesche, Michael Kessler. Biodiversity effects on ecosystem functioning change along environmental stress gradients. Ecology Letters, 2012; DOI: 10.1111/j.1461-0248.2012.01863.x

Cite This Page:

University of Zurich. "Ecosystems cope with stress more effectively the greater the biodiversity." ScienceDaily. ScienceDaily, 5 September 2012. <www.sciencedaily.com/releases/2012/09/120905083751.htm>.
University of Zurich. (2012, September 5). Ecosystems cope with stress more effectively the greater the biodiversity. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2012/09/120905083751.htm
University of Zurich. "Ecosystems cope with stress more effectively the greater the biodiversity." ScienceDaily. www.sciencedaily.com/releases/2012/09/120905083751.htm (accessed August 29, 2014).

Share This




More Earth & Climate News

Friday, August 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) — State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Scientists Have Figured Out Why Rocks Move In Death Valley

Scientists Have Figured Out Why Rocks Move In Death Valley

Newsy (Aug. 28, 2014) — The mystery of the moving rocks in Death Valley, California, has finally been solved. Scientists are pointing to a combo of water, ice and wind. Video provided by Newsy
Powered by NewsLook.com
Big Waves, Minor Flooding from Hurricane

Big Waves, Minor Flooding from Hurricane

AP (Aug. 27, 2014) — Thundering surf spawned by Hurricane Marie pounded the Southern California coast Wednesday, causing minor flooding in a low-lying beach town. High surf warnings were posted for Los Angeles County south through Orange County. (Aug. 27) Video provided by AP
Powered by NewsLook.com
Calif. Quake Underscores Need for Early Warning

Calif. Quake Underscores Need for Early Warning

AP (Aug. 26, 2014) — Researchers at UC Berkeley are testing a prototype of an earthquake early warning system that California is pursuing years after places like Mexico and Japan already have them up and running. (August 26) Video provided by AP
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:
from the past week

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