Featured Research

from universities, journals, and other organizations

Invasive Plants Prefer Disturbance In Exotic Regions Over Home Regions

Date:
July 26, 2006
Source:
University of Chicago Press Journals
Summary:
One of the most invasive exotics in the western United States, the yellow starthistle, is successful both at "invasion" in non-native areas and "colonization" in native ones. However, new research from an international team of researchers finds that a disturbance -- such as fire or grazing -- actually increased the success of yellow starthistle far more in non-native than in its home regions. Furthermore, yellow starthistle was able to establish virtual monocultures in disturbed plots only where it is exotic.

One of the most invasive exotics in the western United States, the yellow starthistle, is successful both at "invasion" in non-native areas and "colonization" in native ones. However, new research from an international team of researchers finds that a disturbance -- such as fire or grazing -- actually increased the success of yellow starthistle far more in non-native than in its home regions. Furthermore, yellow starthistle was able to establish virtual monocultures in disturbed plots only where it is exotic.

Related Articles


"Our results are novel," says Jose Hierro (University of Montana and Universidad Nacional de La Pampa). "No one else has ever shown that ruderals, that is, plants that are generally adapted to disturbance, respond differently to disturbance in native versus non-native regions."

The researchers conducted their research over three years in southern Turkey, where the weed is native, and in California and central Argentina, two regions where the weed is non-native and remarkably abundant. Their findings, published in the August issue of The American Naturalist, question the assumption that disturbance alone is sufficient to explain the remarkable success of invasive plant species in non-native ranges. Instead, the researchers argue, the common and powerful effects of disturbance must act in concert with other factors to allow certain species to dominate plant communities only where they occur as exotics.

The researchers suggest that soil pathogens suppress the growth of certain species and may contribute to the disproportionately powerful effect of disturbance in introduced regions.

"The potential for disturbance to have much stronger effects in invaded systems than in native systems is not trivial," says Ragan Callaway (University of Montana). "If disturbance in non-native regions is no different than in native regions, then clearly the management response is to limit disturbance and thus to limit invasions. However, if disturbance in invaded regions has a much stronger effect that in native regions, then the management response must look beyond disturbance to control or limit the invasion."

Founded in 1867, The American Naturalist is one of the world's most renowned, peer-reviewed publications in ecology, evolution, and population and integrative biology research. AN emphasizes sophisticated methodologies and innovative theoretical syntheses--all in an effort to advance the knowledge of organic evolution and other broad biological principles.

Jose L. Hierro, Diego Villareal, Φzkan Eren, Jon M. Graham, and Ragan M. Callaway, "Disturbance facilitates invasion: the effects are stronger abroad than at home." The American Naturalist 167:144-156.


Story Source:

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


Cite This Page:

University of Chicago Press Journals. "Invasive Plants Prefer Disturbance In Exotic Regions Over Home Regions." ScienceDaily. ScienceDaily, 26 July 2006. <www.sciencedaily.com/releases/2006/07/060726184752.htm>.
University of Chicago Press Journals. (2006, July 26). Invasive Plants Prefer Disturbance In Exotic Regions Over Home Regions. ScienceDaily. Retrieved January 25, 2015 from www.sciencedaily.com/releases/2006/07/060726184752.htm
University of Chicago Press Journals. "Invasive Plants Prefer Disturbance In Exotic Regions Over Home Regions." ScienceDaily. www.sciencedaily.com/releases/2006/07/060726184752.htm (accessed January 25, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Sunday, January 25, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Florida Might Legalize Black Bear Hunting

Florida Might Legalize Black Bear Hunting

Newsy (Jan. 24, 2015) — A string of black bear attacks has Florida officials considering lifting the ban on hunting the animals to control their population. Video provided by Newsy
Powered by NewsLook.com
Dramatic Footage Shows Coast Guard Rescue Off Scottish Coast

Dramatic Footage Shows Coast Guard Rescue Off Scottish Coast

Reuters - News Video Online (Jan. 23, 2015) — Footage just released by the UK Coast Guard shows a dramatic helicopter rescue off the Scottish coast, where five men were plucked to safety after their fishing boat sank on Saturday. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Stunning Wingsuit Proximity Flying in Norway

Stunning Wingsuit Proximity Flying in Norway

Rumble (Jan. 23, 2015) — A collection of amazing shots from flights made in the Aurland Valley in Norway. How incredible is that? Credit to &apos;BASEjumper&apos;. Video provided by Rumble
Powered by NewsLook.com
Senate Agrees Climate Change Is Happening, Just Not On Why

Senate Agrees Climate Change Is Happening, Just Not On Why

Newsy (Jan. 22, 2015) — The Senate voted to confirm climate change is real, but some still weren&apos;t on board with the idea that humans are causing it. 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