Featured Research

from universities, journals, and other organizations

New method for assessing risks from alien species

Date:
June 28, 2013
Source:
The Norwegian University of Science and Technology (NTNU)
Summary:
A new semi-quantitative method that enables researchers and others to assess the environmental impacts posed by alien species is now in use in Norway. While the method is tailored to the Norwegian environment, it can easily be adapted to other countries, and fills an international need for a quantifiable, uniform approach to classifying and assessing alien species. The publication that details the potential impacts of alien species in Norway has also just been released in English.

A new semi-quantitative method that enables researchers and others to assess the environmental impacts posed by alien species is now in use in Norway. While the method is tailored to the Norwegian environment, it can easily be adapted to other countries, and fills an international need for a quantifiable, uniform approach to classifying and assessing alien species. The publication that details the potential impacts of alien species in Norway has also just been released in English.

Related Articles


"This provides an objective classification of these species' potential impact on the Norwegian environment. We relied on much of the same principles as were used in the preparation of 'The 2010 Norwegian Red List for Species'," said Professor Bernt-Erik Sζther at the Norwegian University of Science and Technology's Centre for Biodiversity Dynamics (CBD).

Saether and his colleague Dr. Hanno Sandvik developed the approach, which was then fine-tuned in cooperation with a coalition of researchers from different institutions in Norway and staff from the Norwegian Biodiversity Information Centre (NBIC).

Sζther notes that there is no shared international method for assessing the impacts of alien species in the environment. In fact, the EU has just sent out a call for tenders to develop a "Framework for the identification of invasive alien species of EU concern."

"We hope that EU finds our work interesting. We have established a sound scientific methodology, and results have been well received by users," says Ivar Myklebust, NBIC Director.

Rating risks

The method classifies species according to their ability to spread in, and their effects on, the Norwegian environment. This information allows researchers to plot the risks posed by each species on two axes, one of which shows the species' likelihood of establishment, spread and dispersal, while the other shows the degree to which the alien species will interact with native species or transform habitats. Based on the combined values of the two axes, the alien species can be assigned to one of five impact categories:

  • Species with severe impact (SE) are actually or potentially ecologically harmful species and have the potential to become established across large areas.
  • Species with high impact (HI) have either a restricted/moderate ability to spread, but cause at least a medium ecological effect, or alternatively only a minor ecological effect but have a high invasion potential.
  • Potentially high impact (PH) species have either high ecological effects combined with a low invasion potential, or a high invasion potential without any known ecological effect.
  • Low impact (LO) species have no substantial invasion potential and ecological effect.
  • Species with no known impact (NK) are not known to have spread and have no known ecological effects.

The criteria are applicable to all species regardless of taxonomic position.

Results and black-listed species

Norway's first official foray into evaluating the impacts posed by alien species was with the publication of the "2007 Norwegian Black List" by the Norwegian Biodiversity Information Centre. Only 217 species were assessed in this first effort.

NBIC's new publication, "Alien Species in Norway -- with the Norwegian Black List 2012" includes impact assessments for all 1180 known reproducing alien species in Norway. The 217 species assigned to the two highest impact categories -- severe and high impact -- are on Norway's Black List of alien species. The work also includes information on the 1140 non-reproducing species known from Norwegian territories, including Svalbard, as well as data on distribution and pathways (vectors) into Norway.

Download or order "Alien species in Norway -- with the Norwegian Black List 2012": http://www.artsdatabanken.no/Article.aspx?m=323&amid=12041


Story Source:

The above story is based on materials provided by The Norwegian University of Science and Technology (NTNU). Note: Materials may be edited for content and length.


Journal Reference:

  1. Sandvik, H., Sζther, B.-E., Holmern, T., Tufto, J., Engen, S. & Roy, H. Towards a generic ecological impact assessment of alien species in Norway: a semi-quantitative set of criteria. Biodiversity and Conservation, 2013; 22: 37-62

Cite This Page:

The Norwegian University of Science and Technology (NTNU). "New method for assessing risks from alien species." ScienceDaily. ScienceDaily, 28 June 2013. <www.sciencedaily.com/releases/2013/06/130628092123.htm>.
The Norwegian University of Science and Technology (NTNU). (2013, June 28). New method for assessing risks from alien species. ScienceDaily. Retrieved February 27, 2015 from www.sciencedaily.com/releases/2013/06/130628092123.htm
The Norwegian University of Science and Technology (NTNU). "New method for assessing risks from alien species." ScienceDaily. www.sciencedaily.com/releases/2013/06/130628092123.htm (accessed February 27, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Friday, February 27, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Amazon Keeps Its Green Thanks To The Sahara Desert

The Amazon Keeps Its Green Thanks To The Sahara Desert

Newsy (Feb. 25, 2015) — Satellite data shows the Amazon rainforest supports its lush flora with a little help from Sahara Desert dust. Video provided by Newsy
Powered by NewsLook.com
Mayor Says District of Columbia to Go Ahead With Pot Legalization

Mayor Says District of Columbia to Go Ahead With Pot Legalization

Reuters - News Video Online (Feb. 25, 2015) — Washington&apos;s mayor says the District of Columbia will move forward with marijuana legalization, despite pushback from Congress. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Marijuana Nowhere Near As Deadly As Alcohol: Study

Marijuana Nowhere Near As Deadly As Alcohol: Study

Newsy (Feb. 25, 2015) — A new study says marijuana is about 114 times less deadly than alcohol. Video provided by Newsy
Powered by NewsLook.com
Fox With Horrifying Injury Rescued and Released Back Into the Wild

Fox With Horrifying Injury Rescued and Released Back Into the Wild

RightThisMinute (Feb. 25, 2015) — This wounded fox knew what she was doing when she wandered into the yard of a nature photographer. The photographer got "Scamp" immediately in the hands of Wildlife Aid and she was released back into the wild in no time. Video provided by RightThisMinute
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