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.

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 July 23, 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 July 23, 2014).

Share This




More Earth & Climate News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Observation Boat to Protect Cetaceans During Ship Transfer

Observation Boat to Protect Cetaceans During Ship Transfer

AFP (July 22, 2014) — As part of the 14-ship convoy that will accompany the Costa Concordia from the port of Giglio to the port of Genoa, there will be a boat carrying experts to look out for dolphins and whales from crossing the path of the Concordia. Duration: 01:02 Video provided by AFP
Powered by NewsLook.com
New Orleans Plans to Recycle Cigarette Butts

New Orleans Plans to Recycle Cigarette Butts

AP (July 21, 2014) — New Orleans is the first U.S. city to participate in a large-scale recycling effort for cigarette butts. The city is rolling out dozens of containers for smokers to use when they discard their butts. (July 21) Video provided by AP
Powered by NewsLook.com
Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) — A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com
Spectacular Lightning Storm Hits London

Spectacular Lightning Storm Hits London

AFP (July 19, 2014) — A spectaCular lightning storm struck the UK overnight Friday. Images of lightning strikes over the Shard and Tower Bridge in central London. Duration: 00:23 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