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Antarctic Plants And Animal Life Survived Ice Ages

Date:
September 30, 2007
Source:
British Antarctic Survey
Summary:
Springtails, mites, worms and plant life could help solve the mystery of Antarctica's glacial history according to new research. Scientists report that the evolutionary history of Antarctica's terrestrial plant and animal life does not reconcile with current reconstructions of past glacial ice extent going back more than 23 million years.

Antarctic springtail - Cryptopygus antarcticus. False colour, scanning electron-micrograph. Cryptopygus is one of the most successful terrestrial arthropods to have colonised the Antarctic continent. Although only 1-2 mm long and weighing only a few micro-grams, it is one of the largest animals to complete its lifecycle on the Antarctic continent.
Credit: Pete Bucktrout

Springtails, mites, worms and plant life could help solve the mystery of Antarctica's glacial history according to new research published in the journal Science.

Scientists from British Antarctic Survey (BAS) and Massey University New Zealand report that of the evolutionary history of Antarctica's terrestrial plant and animal life does not reconcile with current reconstructions of past glacial ice extent going back more than 23 million years.

In today's warm period less than 1 percent of Antarctica is ice-free. It has been assumed that during ice ages there was insufficient ice-free land for Antarctic plant and animal species to survive and evolve. However scientists report that an exceptional long-term evolutionary persistence, isolation, and a striking capability to survive global climate change, appear to be the 'norm' rather than the exception for the terrestrial world.

Pete Convey of BAS said, 'Because these groups of invertebrates, plants and microbes occupy such a tiny part of a huge continent climate scientists have tended to ignore them. But recent advances in molecular biology and biogeography show us that they are indeed significant when you are trying to reconstruct a picture of the Earth's glacial history. It is important now for us to work together with scientists from all disciplines to integrate this new biological evidence in glaciological and climate models. It will help answer the big global questions about past and future climate change and be a valuable contribution to International Polar Year 2007-2008.'

The Allan Wilson Centre for Molecular Ecology and Evolution is one of five New Zealand government-funded centres of research excellence. Initially funded in 2002 for six years, the Centre has recently been awarded a further six years of funding.


Story Source:

The above story is based on materials provided by British Antarctic Survey. Note: Materials may be edited for content and length.


Cite This Page:

British Antarctic Survey. "Antarctic Plants And Animal Life Survived Ice Ages." ScienceDaily. ScienceDaily, 30 September 2007. <www.sciencedaily.com/releases/2007/09/070927154919.htm>.
British Antarctic Survey. (2007, September 30). Antarctic Plants And Animal Life Survived Ice Ages. ScienceDaily. Retrieved April 19, 2014 from www.sciencedaily.com/releases/2007/09/070927154919.htm
British Antarctic Survey. "Antarctic Plants And Animal Life Survived Ice Ages." ScienceDaily. www.sciencedaily.com/releases/2007/09/070927154919.htm (accessed April 19, 2014).

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