Featured Research

from universities, journals, and other organizations

'Unsung Species' Ignored On Endangered List

Date:
September 10, 2004
Source:
University Of Alberta
Summary:
The global extinction crisis ignores thousands of affiliated species that are also at risk of being wiped out, making the list of endangered species much larger and more serious than originally thought, says a study produced in part at the University of Alberta.

The global extinction crisis ignores thousands of affiliated species that are also at risk of being wiped out, making the list of endangered species much larger and more serious than originally thought, says a study produced in part at the University of Alberta.

Related Articles


"What we found is that with the extinction of a bird, or a mammal or a plant, you aren't just necessarily wiping out just one, single species," said Dr. Heather Proctor from the U of A's Department of Biological Sciences. "We're also allowing all these unsung dependent species to be wiped out as well."

Proctor and a research team lead by Lian Pin Koh of the National University of Singapore and Robert Dunn from the University of Tennessee, calculated the expected levels of co-extinction across a diverse selection of host and associate systems. Their research is published in the current edition of the prestigious journal, "Science."

The team first compiled a list of 12,200 plants and animals currently listed as threatened or endangered. They then looked at the diverse selection of insects, mites, fungi and other organisms that are uniquely adapted to the threatened host. The researchers found that at least 200 affiliate species have already been lost through co-extinction and that a further 6300 should be classified as "co-endangered."

"What we wanted to learn was, if the host goes extinct, how many other species will go with it," said Proctor. "It would be easy if there were always a one-to-one relationship with a host and its affiliate; however, not all parasites, for example, are restricted to a single host species. The trick was in trying to determine how many other species could act as hosts and factoring that degree of dependence into the study."

The researchers believe these processes have been largely overlooked in the past because some of the most susceptible organisms are uncharismatic parasites, but other more popular animals are also at stake.

Proctor cites a host plant vine that became locally extinct in Singapore, taking along with it a species of butterfly, Parantica aspasia, that was dependent on the vine for survival. "When we lose this vine, this beautiful butterfly dies off with it, and we'll never see it again except in photographs at museums," said Proctor. "And when that happens, it can never be recovered."

While this new research has implications for theoreticians who calculate endangered species, the moral issue is even more significant and should suggest more efforts to maintain the original species, said Proctor. The loss of species through co-extinction represents the loss of irreplaceable evolution and co-evolutionary history, say the researchers, and should have immediate implications for local conservation and management decisions.


Story Source:

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


Cite This Page:

University Of Alberta. "'Unsung Species' Ignored On Endangered List." ScienceDaily. ScienceDaily, 10 September 2004. <www.sciencedaily.com/releases/2004/09/040910082907.htm>.
University Of Alberta. (2004, September 10). 'Unsung Species' Ignored On Endangered List. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2004/09/040910082907.htm
University Of Alberta. "'Unsung Species' Ignored On Endangered List." ScienceDaily. www.sciencedaily.com/releases/2004/09/040910082907.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Christmas Kissing Good for Health

Christmas Kissing Good for Health

Reuters - Innovations Video Online (Dec. 22, 2014) Scientists in Amsterdam say couples transfer tens of millions of microbes when they kiss, encouraging healthy exposure to bacteria. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Brain-Dwelling Tapeworm Reveals Genetic Secrets

Brain-Dwelling Tapeworm Reveals Genetic Secrets

Reuters - Innovations Video Online (Dec. 22, 2014) Cambridge scientists have unravelled the genetic code of a rare tapeworm that lived inside a patient's brain for at least four year. Researchers hope it will present new opportunities to diagnose and treat this invasive parasite. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
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