Featured Research

from universities, journals, and other organizations

Biological Invasions Can Begin With Just One Insect

Date:
September 13, 2007
Source:
Public Library of Science
Summary:
A new study has shown that a lone insect can initiate a biological invasion. The scientists examined patterns of genetic diversity in both native European and invasive North American populations of a solitary bee. They concluded that the invasion was most likely founded by one mated female.

A new study by York University biologists Amro Zayed and Laurence Packer has shown that a lone insect can initiate a biological invasion.

Related Articles


Zayed, a recent graduate of Packer's lab, examined patterns of genetic diversity in both native European and invasive North American populations of a solitary bee. He concluded that the invasion was most likely founded by one mated female.

"This is a shocking result, especially since bees suffer from huge genetic problems in small populations," says Zayed, now a postdoctoral fellow in the Department of Entomology at the University of Illinois.

"We're now seeing that the introduction of even one single insect can cause a potentially costly invasion, so we have to be extremely vigilant with reducing the number of animals that are unintentionally transported around the globe," he says.

The study contradicts a popular theory of invasive biology: the more individuals introduced to an area, the higher the success of the invasion. This concept is commonly referred to as the "propagule pressure hypothesis."

Zayed adds that numbers are not the only factor controlling the success of invasions. "Chance and the specific characteristics of invasive species and their introduced habitats can be more important," he says.

Packer, a professor in York's Department of Biology, notes that exotic invasive species are considered a major threat to biodiversity conservation, and can cause huge economic losses.

"Understanding how exotic species establish and spread in their new habitats is the first step to solving the invasive species problem," Packer says.

  The study was published recently in the open access journal PLoS One.

Citation: Zayed A, Constantin SēA, Packer L (2007) Successful Biological Invasion despite a Severe Genetic Load. PLoS One 2(9): e868. doi:10.1371/journal.pone.0000868


Story Source:

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


Cite This Page:

Public Library of Science. "Biological Invasions Can Begin With Just One Insect." ScienceDaily. ScienceDaily, 13 September 2007. <www.sciencedaily.com/releases/2007/09/070911202453.htm>.
Public Library of Science. (2007, September 13). Biological Invasions Can Begin With Just One Insect. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2007/09/070911202453.htm
Public Library of Science. "Biological Invasions Can Begin With Just One Insect." ScienceDaily. www.sciencedaily.com/releases/2007/09/070911202453.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

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) — Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
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

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