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- Newsgroups: sci.environment
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- From: andrewt@watson.ibm.com (Andrew Taylor)
- Subject: Re: Temperate zone habitat loss
- Sender: news@watson.ibm.com (NNTP News Poster)
- Message-ID: <1993Jan26.051602.30218@watson.ibm.com>
- Date: Tue, 26 Jan 1993 05:16:02 GMT
- Disclaimer: This posting represents the poster's views, not necessarily those of IBM
- References: <STEINLY.93Jan20124040@topaz.ucsc.edu> <1993Jan21.032938.28382@watson.ibm.com> <STEINLY.93Jan22155531@topaz.ucsc.edu>
- Nntp-Posting-Host: mothra6.watson.ibm.com
- Organization: IBM T.J. Watson Research Center
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- In article <STEINLY.93Jan22155531@topaz.ucsc.edu> steinly@topaz.ucsc.edu (Steinn Sigurdsson) writes:
- >So, question is whether establishing a species in a new habitat which they
- >could not reach naturally will, in the long run, lead to (several) new
- >species evolving?
-
- Clearly it possible. Look at the Galagapos finches, one species reached
- the islands radiating into 13 species today. An artificial introduction
- could produce the same result. This does not mean it is likely.
-
- The vague possibility of a few new species, closely related to an existing
- species, in perhaps ten thousand years time is cold comfort for the
- threat that introduced species pose immediately.
-
- One of man's older introductions is that of the domestic dog into mainland
- Australia. It is now considered a separate subspecies. The Dingo likely
- played a large role in the extinction of the Thylacine in mainland Australia
- and probably some other extinctions too. Even if the Dingo were a full
- species, it would be little compensation for the loss of the Thylacine -
- the last surviving large marsupial predator.
-
- I think economic considerations alone, justify much more effort being
- expended on the preventing the introduction of foreign species.
-
- Andrew Taylor
-