Printer Friendly

Bacteria on ice.

Kangaroos bounce around the arid lands of Australia, but they don't make anywhere else their home. This geographic isolation results, in part, from the inability of large animals to disperse easily to other suitable environments around the world.

Bacteria, whose microscopic size allows them to spread by water, air, seeds, and a variety of mobile organisms, shouldn't have that problem, notes James T.

Staley of the University of Washington in Seattle. At least that's what microbiologists have speculated, he says. Anywhere bacteria can survive, they should probably exist, goes the theory.

Staley's research over the last 5 years offers evidence to the contrary, however. His group has collected bacteria from the bottom of sea ice that builds up every winter at the North and South Poles. "Nobody else has really looked in this environment. Most of the organisms are brand-new," says Staley.

Despite almost identical habitats, none of the bacteria so far found under the North Pole ice has been collected at the South Pole, and vice versa.

Understanding this surprising geographic diversity of bacteria should help investigators estimate the true number of bacterial species, of which we know perhaps 1 percent, says Staley.
COPYRIGHT 1996 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1996, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:American Association for the Advancement of Science; bacteria found in ice at South Pole differs from that found at the North Pole
Author:Travis, John
Publication:Science News
Article Type:Brief Article
Date:Feb 24, 1996
Words:194
Previous Article:A mouthful of gene therapy.
Next Article:Delivering drugs directly to brain tumors.
Topics:


Related Articles
Mastodon remains yield oldest life.
Icy clues gleaned from Mercury's other half.
Water world?
More evidence of ice on the moon.
Craft finds evidence of ice on the moon.
Bacteria under ice: Some don't like it hot.
Antarctica Melts.
Odyssey's first look: craft spies signs of ice at the Martian south pole.
Ice Princess.
Radar probes frozen water at Martian pole.

Terms of use | Copyright © 2018 Farlex, Inc. | Feedback | For webmasters