Featured Research

from universities, journals, and other organizations

Variation in land-use intensity leads to higher biodiversity

Date:
December 24, 2013
Source:
University of Bern
Summary:
If grassland is managed intensively, biodiversity typically declines. A new study led by Bernese plant ecologists shows that it is rare species that suffer the most. These negative effects could be reduced, if farmers varied the intensity of their land use between years.

Variation in land-use intensity between years – as here in the Schwäbische Alb – leads to higher biodiversity.
Credit: Ilka Mai, Botanischer Garten der Universität Potsdam

If grassland is managed intensively, biodiversity typically declines. A new study led by Bernese plant ecologists shows that it is rare species that suffer the most. These negative effects could be reduced, if farmers varied the intensity of their land use between years.

Related Articles


Globally, the intensification of agricultural land use is considered the leading threat to biodiversity. Previous studies on the impacts of land-use intensity on biodiversity have only looked at single or small groups of organisms. However, individual species can vary greatly in how they respond to different land uses, meaning that the overall impact on biodiversity is often not clear.

A research study, published in the Proceedings of the National Academy of Science (PNAS), led by the Professors Eric Allan and Markus Fischer at the University of Bern, shows that farmers can help protect grassland biodiversity by varying management intensity over time. This reduces some of the negative effects of intensive land use, particularly for rare species.

New index measures ecosystem biodiversity

A team of 58 scientists, from both Switzerland and Germany, assembled a uniquely comprehensive dataset on the biodiversity of up to 49 groups of organisms, including groups of bacteria, fungi, plants and animals. They used data from study sites that they had established in 150 grasslands in three regions of Germany, the Biodiversity Exploratories, which varied from extensively managed and lightly grazed to intensively grazed or mown grasslands with high fertilizer input.

The scientists used these data to compile a novel index of "multidiversity," which measures total ecosystem biodiversity. "The study showed that overall biodiversity declined very strongly with increasing land-use intensity and that this was particularly true for rarer species," explains Eric Allan of the Institute of Plant Sciences at the University of Bern. Plants, grasshoppers and butterflies declined most strongly.

According to Eric Allan, the results provide very strong evidence for the importance of extensively managed grasslands for nature conservation: "This new index provides a single measure of biodiversity for an ecosystem and should make it easier to assess the effects of conservation measures or restoration efforts on biodiversity."

Variation in land-use intensity as new strategy

Interestingly, the scientists also found biodiversity to be much higher in grasslands in which land-use intensity had varied over the last few years. "This suggests that varying management intensity over time could be a novel strategy to maintain biodiversity in grasslands, for instance by altering the number of livestock or the frequency of mowing between years," explains Markus Fischer

The rare species in the study benefited particularly from changing land use over time: At intermediate land-use intensity, the biodiversity of the rarer species was almost twice as high when land-use intensity varied between years. "This result shows that farmers could do a lot for biodiversity conservation simply by varying the intensity of their land-use between years, as long as the mean intensity of management does not get too high," says Eric Allan.


Story Source:

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


Journal Reference:

  1. Jörg Müller, Valentin H. Klaus, Till Kleinebecker, Daniel Prati, Norbert Hölzel, Markus Fischer. Impact of Land-Use Intensity and Productivity on Bryophyte Diversity in Agricultural Grasslands. PLoS ONE, 2012; 7 (12): e51520 DOI: 10.1371/journal.pone.0051520

Cite This Page:

University of Bern. "Variation in land-use intensity leads to higher biodiversity." ScienceDaily. ScienceDaily, 24 December 2013. <www.sciencedaily.com/releases/2013/12/131224183547.htm>.
University of Bern. (2013, December 24). Variation in land-use intensity leads to higher biodiversity. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2013/12/131224183547.htm
University of Bern. "Variation in land-use intensity leads to higher biodiversity." ScienceDaily. www.sciencedaily.com/releases/2013/12/131224183547.htm (accessed October 30, 2014).

Share This



More Earth & Climate News

Thursday, October 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Mudslide in Sri Lanka Buries Houses

Deadly Mudslide in Sri Lanka Buries Houses

AP (Oct. 29, 2014) — A mudslide triggered by monsoon rains buried scores of workers' houses at a tea plantation in central Sri Lanka on Wednesday, killing at least 10 people and leaving more than 250 missing, an official said. (Oct. 29) Video provided by AP
Powered by NewsLook.com
Galapagos Tortoises Bounce Back, But Ecosystem Lags

Galapagos Tortoises Bounce Back, But Ecosystem Lags

Newsy (Oct. 29, 2014) — The Galapagos tortoise has made a stupendous recovery from the brink of extinction to a population of more than 1,000. But it still faces threats. Video provided by Newsy
Powered by NewsLook.com
Saharan Solar Project to Power Europe

Saharan Solar Project to Power Europe

Reuters - Business Video Online (Oct. 29, 2014) — A solar energy project in the Tunisian Sahara aims to generate enough clean energy by 2018 to power two million European homes. Matt Stock reports. Video provided by Reuters
Powered by NewsLook.com
Obama: The US Will Not 'run and Hide' From Ebola

Obama: The US Will Not 'run and Hide' From Ebola

AP (Oct. 29, 2014) — Surrounded by health care workers in the White House East Room, President Barack Obama said the U.S. will likely see additional Ebola cases in the weeks ahead. But he said the nation can't seal itself off in the fight against the disease. (Oct. 29) 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:

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