Featured Research

from universities, journals, and other organizations

Why North America Black Cherry Tree Is Invasive In Europe

Date:
July 28, 2009
Source:
USDA/Agricultural Research Service
Summary:
Black cherry trees, native to the United States, are an invasive species in Europe and thrive in that part of the world. Experiments show why: A soil-borne pathogen keeps these trees in check in the United States, but is too weak to stop them from spreading in Europe.

An ARS scientist has discovered why our native black cherry tree is so invasive in Europe.
Credit: Photo courtesy of Barbara Tokarska-Guzik, University of Silesia, Bugwood.org

Black cherry trees, native to the United States, are an invasive species in Europe and thrive in that part of the world. Experiments show why: A soil-borne pathogen keeps these trees in check in the United States, but is too weak to stop them from spreading in Europe.

That's according to a study by Agricultural Research Service (ARS) ecologist Kurt Reinhart at the agency's Fort Keogh Livestock and Range Research Laboratory in Miles City, Mont. He and cooperators collected soil randomly around black cherry trees in more than 20 forests throughout their range in the United States, and nearly 20 forests throughout their range in Germany, France, Belgium and The Netherlands. They isolated the pathogen, called Pythium, from the soil samples.

Pythium "damping-off disease" kills seedlings in farm fields and greenhouses as well as trees in forests.

Reinhart and colleagues tested the virulence of each Pythium isolate. They then used DNA sequencing to identify each isolate. They found that some nonaggressive Pythium types were common in both ranges, but aggressive types were found only among samples from the tree's native range.

The study is unique because the scientists tested the virulence of soil-borne pathogens associated with cherry trees in the trees' native and non-native ranges. Other studies have documented variation in the number of pathogen species associated with plants in their native versus non-native ranges, but have not determined virulence.

Demographic research by the scientists indicates that black cherry trees grow much more sparsely in native than in European forests. This pattern, coupled with results from the pathogenicity experiments, suggests that Pythium helps regulate black cherry populations in the United States, but not in European forests.

Evidence of an invader encountering more aggressive enemies in its native versus non-native range provides new evidence for the popular hypothesis that invasive species-whether plants, insects, or other animals-thrive outside of their native lands in part because they have escaped their enemies.

Reinhart will summarize results from this study at the Soil Ecology Society and Society of Nematologists Joint Meeting in Burlington, Vt. in July 2009.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "Why North America Black Cherry Tree Is Invasive In Europe." ScienceDaily. ScienceDaily, 28 July 2009. <www.sciencedaily.com/releases/2009/07/090719185452.htm>.
USDA/Agricultural Research Service. (2009, July 28). Why North America Black Cherry Tree Is Invasive In Europe. ScienceDaily. Retrieved September 21, 2014 from www.sciencedaily.com/releases/2009/07/090719185452.htm
USDA/Agricultural Research Service. "Why North America Black Cherry Tree Is Invasive In Europe." ScienceDaily. www.sciencedaily.com/releases/2009/07/090719185452.htm (accessed September 21, 2014).

Share This



More Earth & Climate News

Sunday, September 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Will Climate Rallies Spur Change?

Will Climate Rallies Spur Change?

Newsy (Sep. 21, 2014) Organizers of the People's Climate March and other rallies taking place in 166 countries hope to move U.N. officials to action ahead of their summit. Video provided by Newsy
Powered by NewsLook.com
Thousands March in NYC Over Climate Change

Thousands March in NYC Over Climate Change

AP (Sep. 21, 2014) Accompanied by drumbeats, wearing costumes and carrying signs, thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (Sept. 21) Video provided by AP
Powered by NewsLook.com
Climate Change Rally Held in India Ahead of UN Summit

Climate Change Rally Held in India Ahead of UN Summit

AFP (Sep. 20, 2014) Some 125 world leaders are expected to commit to action on climate change at a UN summit Tuesday called to inject momentum in struggling efforts to tackle global warming. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
New Music With Recycled Instruments at Colombia Fest

New Music With Recycled Instruments at Colombia Fest

AFP (Sep. 19, 2014) Jars, bottles, caps and even a pizza box, recovered from the trash, were the elements used by four musical groups at the "RSFEST2014 Sonorities Recycling Festival", in Colombian city of Cali. Duration: 00:49 Video provided by AFP
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