You are in Guest mode. If you want to post, you'll need to register (we promise it's painless).
Registered users should log in now. (Forgot your password?)

Guest-accessible forum This forum allows unregistered guests access to read. You must register to post in this forum.

Nature_and_Environment.20

Topic HomeTopicsForum HomeForumsHomeSearchSettingsHelpExit

Invasive species (exotic/non-native troublemakers)

--------

{Nature_and_Environment.20.1}: Kai Hagen {kai} Tue, 11 May 2004 06:58:31 CDT (HTML)

This problem flies under the radar too often.

But more and more often, introduced non-native plants and animals are a serious problem, threatening native plants and wildlife, even entire ecosystems, at times.

--------

{Nature_and_Environment.20.2}: Kai Hagen {kai} Tue, 11 May 2004 08:15:09 CDT (HTML)

Invasive frogs in San Francisco pond evade eradication efforts

Tuesday, May 11, 2004
By Mielikki Org, Associated Press

SAN FRANCISCO — California biologists are alarmed over the latest invasive species to take up residence in this city: African clawed frogs, who eat just about anything and tend to breed like crazy.

Even worse, they're kind of cute and, thus, more likely to be whisked away by children and dumped into other ponds, where they spread even more.

"They are a threat," said Dr. David Wake, an emeritus professor of integrative biology at the University of California-Berkeley. "They change the environment quite profoundly."

Native to Kenya, the frogs are able to live under ice, in the ground, and in salty water. They alter ecosystems by gobbling up insects, fish, lizards, and even birds who fit into their large, tongueless mouths. They also burrow into the ground to survive dry conditions and prey on the state's endangered red-legged frog.

The African frogs, outlawed as pets in California several years ago, are used in medical and biological research. Some theorize that researchers might have released the animals into Golden Gate Park's Lily Pond and parts of Southern California to save the frogs from destruction.

Complete article:
http://www.enn.com/news/2004-05-11/s_23674.asp

--------

{Nature_and_Environment.20.3}: Kai Hagen {kai} Tue, 11 May 2004 08:17:21 CDT (HTML)

http://www.invasivespecies.gov/

Invasivespecies.gov is the gateway to Federal efforts concerning invasive species. On this site you can learn about the impacts of invasive species and the Federal government's response, as well as read select species profiles and find links to agencies and organizations dealing with invasive species issues. Invasivespecies.gov is also the Web site for the National Invasive Species Council, which coordinates Federal responses to the problem.

What is an Invasive Species?

An "invasive species" is defined as a species that is 1) non-native (or alien) to the ecosystem under consideration and 2) whose introduction causes or is likely to cause economic or environmental harm or harm to human health. (Executive Order 13112).

Invasive species can be plants, animals, and other organisms (e.g., microbes). Human actions are the primary means of invasive species introductions.

--------

{Nature_and_Environment.20.4}: Glen Marks {wotan} Thu, 01 Jul 2004 17:36:57 CDT (9 lines)

Tonight on NEWSHOUR:

- Alien Invasion

Beetles from Asia, aggressive ants from South America and wild weeds
from the Balkans are just some of the antagonists America faces in
its ongoing struggle against invasive species. Correspondent Jeffrey
Kaye looks at efforts to combat these alien plants and animals which
arrive -- and thrive -- on American shores.

--------

{Nature_and_Environment.20.5}: Argentine Ants in Australia {bshmr} Fri, 13 Aug 2004 14:17:26 CDT (19 lines)

[ Introduced species; limited gene pool. ]

http://news.bbc.co.uk/go/em/-/1/hi/sci/tech/3561352.stm

Super ant colony hits Australia, Argentine ant, AFP

Natural aggression kept numbers under control in the ants' native country
A giant colony of ants stretching 100km (62 miles) has been discovered
in the Australian city of Melbourne, threatening local insect species.

The ants, which were imported from Argentina, are ranked among the
world's 100 worst animal invaders.

Although they exist in their usual smaller group size in their
homeland, the colonies have merged in Australia to create one massive
super colony.

Experts fear that the invasion poses a threat to biodiversity in the area.
(...)

--------

{Nature_and_Environment.20.6}: Philip Gore {zzdormouse} Thu, 09 Sep 2004 21:58:30 CDT (3 lines)

Thanks, Kai, for the gov't invasive plant link.  Garlic mustard and
multiflora rose are becoming ever more prevalent on my land
and through much of the state forest that surrounds my place.

--------

Forum
Topic HomeTopicsForum HomeForumsHomeSearchSettingsHelpExit
Guest-accessible forum This forum allows unregistered guests access to read. You must register to post in this forum.

You are in Guest mode. If you want to post, you'll need to register (we promise it's painless).
Registered users should log in now. (Forgot your password?)

The New Café  Home | Your Hotlist and Directory | Independent Partner Forums |
FAQ | User Guidelines | Privacy Policy