Featured Research

from universities, journals, and other organizations

All Mixed Up: How Do Hybrids Fit Into The Picture?

Date:
March 18, 1999
Source:
Ecological Society Of America
Summary:
Hybrids are a symbol of complexity. For several decades these mixed species have challenged ecologists who study their role in ecological communities. Ecologists are still asking themselves the question: Are plant and animal hybrids viable contributors to ecosystems or just evolutionary blunders? The Special Feature in the March issue of Ecology focuses on hybridization and the current research encompassing this issue.

Dog lovers in search for the right canine are often faced with the challenge of choosing between a mutt and a pure breed. Most of these people would never expect that their own curiosities are also shared by ecologists.

Hybrids are a symbol of complexity. For several decades these mixed species have challenged ecologists who study their role in ecological communities. Ecologists are still asking themselves the question: Are plant and animal hybrids viable contributors to ecosystems or just evolutionary blunders? The Special Feature in the March issue of Ecology focuses on hybridization and the current research encompassing this issue.

Indeed, researchers are intrigued by the unique genetic makeup of hybrid species that merit evolutionary distinction from their parental generations. Researchers at the University of Georgia, Department of Genetics conducted a study challenging the existing paradigms that minimize the importance of hybridization in ecological settings. Michael Arnold et al. in their paper "Natural Hybridization: How Low Can You Go and Still Be Important?" state that hybrids are in fact viable evolutionary components of communities, and in some cases, more fit than their parents. Because hybridization enhances genetic variation, Arnold states, "…hybrid genotypes can be more fit than parental genotypes in novel environments."

In contrast, Catherine Moulia from the Laboratoire de Parasiologie Compare in France presents a different scenario. Her research on hybrid mice reveals that they are more prone to parasite attack than their parental counterparts (Mus mus musculus and M. m. domesticus). Her review of the parasitism of animal hybrids not only suggests an evolutionary implication of parasites. It also stresses that this implication of parasites is very similar in animal and in plant hybrids.

According to some studies reviewed by Moulia, "By taking advantage of hybrid susceptibility, parasites could enhance their range and therefore abundance within an ecosystem."

Her paper, titled "Parasitism of Plant and Animal Hybrids: Are Facts and Fates the Same?" demonstrates how hybrids impact the population dynamics of parasite species and how these parasites in turn could impact the evolution of hybridizing species.

Robert Fritz from Vassar College investigates the environmental and genetic factors that lead to plant hybrid fitness.

"Genetic composition is an important factor in determining fitness, as hybrids have the capacity to develop either enhanced or decreased fitness," says Fritz. However, environmental conditions and interactions of hybrids in different environments are equally important.

Fritz proposes a new theoretical model that he calls the "ecological resistance gradient model." The model supports his studies of environmental effects on hybrid fitness.

Other advances, such as those in molecular technology, are allowing researchers to better classify and study hybrid lifestyles. The application of these techniques will enable them to monitor genetic stocks of rare species that are potentially threatened by hybrid invasion. This and other evolutionary concerns will be addressed as ecologists begin to better understand the roles hybrids play in ecosystems.

###

Ecology is a peer-reviewed journal published eight times a year by the Ecological Society of America (ESA). Copies of the above article are available free of charge to the press through the Society's Public Affairs Office. Members of the press may also obtain copies of ESA's entire family of publications, which includes Ecology, Ecological Applications, Ecological Monographs, and Conservation Ecology. Others interested in copies of articles should contact the Reprint Department at the address in the masthead.

Founded in 1915, the Ecological Society of America (ESA) is a scientific, non-profit, organization with over 7000 members. Through ESA reports, journals, membership research, and expert testimony to Congress, ESA seeks to promote the responsible application of ecological data and principles to the solution of environmental problems. For more information about the Society and its activities, access ESA's web site at: http://esa.sdsc.edu.


Story Source:

The above story is based on materials provided by Ecological Society Of America. Note: Materials may be edited for content and length.


Cite This Page:

Ecological Society Of America. "All Mixed Up: How Do Hybrids Fit Into The Picture?." ScienceDaily. ScienceDaily, 18 March 1999. <www.sciencedaily.com/releases/1999/03/990318041648.htm>.
Ecological Society Of America. (1999, March 18). All Mixed Up: How Do Hybrids Fit Into The Picture?. ScienceDaily. Retrieved August 30, 2014 from www.sciencedaily.com/releases/1999/03/990318041648.htm
Ecological Society Of America. "All Mixed Up: How Do Hybrids Fit Into The Picture?." ScienceDaily. www.sciencedaily.com/releases/1999/03/990318041648.htm (accessed August 30, 2014).

Share This




More Plants & Animals News

Saturday, August 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Raw: Australian Sheep Gets Long Overdue Haircut

Raw: Australian Sheep Gets Long Overdue Haircut

AP (Aug. 28, 2014) Hoping to break the record for world's wooliest, Shaun the sheep came up 10 pounds shy with his fleece weighing over 50 pounds after being shorn for the first time in years. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Minds Blown: Scientists Develop Fish That Walk On Land

Minds Blown: Scientists Develop Fish That Walk On Land

Newsy (Aug. 28, 2014) Canadian scientists looking into the very first land animals took a fish out of water and forced it to walk. Video provided by Newsy
Powered by NewsLook.com
Huge Ancient Wine Cellar Found In Israel

Huge Ancient Wine Cellar Found In Israel

Newsy (Aug. 28, 2014) An international team uncovered a large ancient wine celler that likely belonged to a Cannonite ruler. 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:
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