Featured Research

from universities, journals, and other organizations

Ecosytem Modeling: Novel Approach To Incorporate Nontrophic Interactions

Date:
January 5, 2008
Source:
University of Chicago Press Journals
Summary:
Most ecological theories deal with simple consumer--resource interactions. Scientists now provide a novel approach to incorporate nontrophic interactions, such as pollination and habitat modification, in ecosystem models, which allows them to study the dynamics of complex interaction webs. Their model adds nontrophic interactions to a food web in the form of modifications of trophic interactions. It also tracks nutrient fluxes in the food web and hence satisfies the principle of mass conservation.

Most ecological theories deal with simple consumer--resource interactions. Scientists at Ecole Normale Supérieure (Paris) and McGill University provide a novel approach to incorporate nontrophic interactions, such as pollination and habitat modification, in ecosystem models, which allows them to study the dynamics of complex interaction webs.

Related Articles


Their model adds nontrophic interactions to a food web in the form of modifications of trophic interactions. It also tracks nutrient fluxes in the food web and hence satisfies the principle of mass conservation.

Using this model, they show that nontrophic interactions can profoundly influence ecosystem properties such as species diversity, biomass, and production. In turn, the nature, prevalence, and strength of species interactions depend on species diversity. Counterintuitively, strong positive interactions tend to deteriorate ecosystem functioning because consumers become very efficient at exploiting their resources.

"Nontrophic interactions are still poorly studied theoretically, and their impact on biodiversity and ecosystem functioning was largely unknown," says Michel Loreau, Canada Research Chair in theoretical ecology.

"We hope that our new approach will boost their study and contribute to a more comprehensive theory of complex ecological systems. Organisms interact in many other ways than through feeding on each other or competing for shared resources," he adds. "Ecology should be able to account, not only for the diversity of species, but also for the diversity of their interactions."

The study, "Nontrophic interactions, biodiversity, and ecosystem functioning: an interaction web model," by Alexandra Goudard (Ecole Normale Supérieure and Université Pierre et Marie Curie) and Michel Loreau (McGill University) was published in the January issue of the American Naturalist.


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. "Ecosytem Modeling: Novel Approach To Incorporate Nontrophic Interactions." ScienceDaily. ScienceDaily, 5 January 2008. <www.sciencedaily.com/releases/2008/01/080104173642.htm>.
University of Chicago Press Journals. (2008, January 5). Ecosytem Modeling: Novel Approach To Incorporate Nontrophic Interactions. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2008/01/080104173642.htm
University of Chicago Press Journals. "Ecosytem Modeling: Novel Approach To Incorporate Nontrophic Interactions." ScienceDaily. www.sciencedaily.com/releases/2008/01/080104173642.htm (accessed October 24, 2014).

Share This



More Earth & Climate News

Friday, October 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

EU Gets Climate Deal, UK PM Gets Knock

EU Gets Climate Deal, UK PM Gets Knock

Reuters - Business Video Online (Oct. 24, 2014) — EU leaders achieve a show of unity by striking a compromise deal on carbon emissions. But David Cameron's bid to push back EU budget contributions gets a slap in the face as the European Commission demands an extra 2bn euros. David Pollard reports. Video provided by Reuters
Powered by NewsLook.com
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
Raw: Tornado Rips Roofs in Washington State

Raw: Tornado Rips Roofs in Washington State

AP (Oct. 24, 2014) — A rare tornado ripped roofs off buildings, uprooted trees and shattered windows Thursday afternoon in the southwest Washington city of Longview, but there were no reports of injuries. (Oct. 24) Video provided by AP
Powered by NewsLook.com
Fast-Moving Lava Headed For Town On Hawaii's Big Island

Fast-Moving Lava Headed For Town On Hawaii's Big Island

Newsy (Oct. 24, 2014) — Lava from the Kilauea volcano on Hawaii's Big Island has accelerated as it travels toward a town called Pahoa. 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