New species can develop in as little as two generations, Galapagos study finds

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Gawdzilla Sama
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New species can develop in as little as two generations, Galapagos study finds

Post by Gawdzilla Sama » Sun Nov 26, 2017 2:08 pm

New species can develop in as little as two generations, Galapagos study finds

New species can develop in as little as two generations, Galapagos study finds
Date: November 24, 2017
Source: Princeton University
Summary: A study of Darwin's finches, which live on the Galapagos Islands in the Pacific Ocean, has revealed direct genetic evidence that new species can arise in just two generations.

The arrival 36 years ago of a strange bird to a remote island in the Galapagos archipelago has provided direct genetic evidence of a novel way in which new species arise.

In this week's issue of the journal Science, researchers from Princeton University and Uppsala University in Sweden report that the newcomer belonging to one species mated with a member of another species resident on the island, giving rise to a new species that today consists of roughly 30 individuals.

The study comes from work conducted on Darwin's finches, which live on the Galapagos Islands in the Pacific Ocean. The remote location has enabled researchers to study the evolution of biodiversity due to natural selection.

The direct observation of the origin of this new species occurred during field work carried out over the last four decades by B. Rosemary and Peter Grant, two scientists from Princeton, on the small island of Daphne Major.

"The novelty of this study is that we can follow the emergence of new species in the wild," said B. Rosemary Grant, a senior research biologist, emeritus, and a senior biologist in the Department of Ecology and Evolutionary Biology. "Through our work on Daphne Major, we were able to observe the pairing up of two birds from different species and then follow what happened to see how speciation occurred."


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Re: New species can develop in as little as two generations, Galapagos study finds

Post by Abdul Alhazred » Mon Nov 27, 2017 1:22 pm

The Galapagos do it again! :pr:
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Re: New species can develop in as little as two generations, Galapagos study finds

Post by ElectricMonk » Mon Nov 27, 2017 6:50 pm

...
that would suggest that there are in fact different species of humans currently in the world.

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Re: New species can develop in as little as two generations, Galapagos study finds

Post by Abdul Alhazred » Mon Nov 27, 2017 11:33 pm

ElectricMonk wrote:...
that would suggest that there are in fact different species of humans currently in the world.


No.

Only that it is possible given the right conditions.

Too much interbreeding for that right now. :pr:
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Re: New species can develop in as little as two generations, Galapagos study finds

Post by bobbo_the_Pragmatist » Tue Nov 28, 2017 12:04 am

I'm wondering if that Generation two offspring had to mate with another Gen two to produce the Third Gen that could not reproduce with Generation One? Kinda like Mules and horses?.................. Saddle up.
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Re: New species can develop in as little as two generations, Galapagos study finds

Post by Lance Kennedy » Wed Nov 29, 2017 4:09 am

That makes quite a few species that have split into two different species during the time that biologists have been studying them. I read an article about cichlid fishes in Lake Victoria in Africa that had done that during the study period. Also another about a species of lizard in the Caribbean that split into two species in a short time.

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Re: New species can develop in as little as two generations, Galapagos study finds

Post by ElectricMonk » Wed Nov 29, 2017 5:48 am

Abdul Alhazred wrote:
ElectricMonk wrote:...
that would suggest that there are in fact different species of humans currently in the world.


No.

Only that it is possible given the right conditions.

Too much interbreeding for that right now. :pr:


There are plenty of places in the world which have both very particular conditions and relatively isolated populations. It is quite possible that they have divergent enough to form something that could be called a new species.
But one thing we have learned recently is that just because you are a different specie doesn't mean you can't cross-bread: the mix of Homo Sapiens with other Homo species (as evident in the genes of non-Africans) shows that.

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Re: New species can develop in as little as two generations, Galapagos study finds

Post by Abdul Alhazred » Wed Nov 29, 2017 11:59 am

There are plenty of places in the world which have both very particular conditions and relatively isolated populations.


Still all you are proving is that it could happen.
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Re: New species can develop in as little as two generations, Galapagos study finds

Post by ElectricMonk » Wed Nov 29, 2017 12:39 pm

Abdul Alhazred wrote:Still all you are proving is that it could happen.


of course.
It would require mass gene sequencing of various populations to adequately judge how diverse human genetics actually are, and if such differences could rise to the level of speciation.
But the results of the study above suggest that it is possible.

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Re: New species can develop in as little as two generations, Galapagos study finds

Post by Austin Harper » Wed Nov 29, 2017 2:54 pm

ElectricMonk wrote:But one thing we have learned recently is that just because you are a different specie doesn't mean you can't cross-bread: the mix of Homo Sapiens with other Homo species (as evident in the genes of non-Africans) shows that.

Is this the current thinking? I've also heard classifications in the past of our species as Homo sapiens sapiens and Neanderthals as Homo sapiens neanderthalensis making us both subspecies of the species H. sapiens.
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Re: New species can develop in as little as two generations, Galapagos study finds

Post by ElectricMonk » Wed Nov 29, 2017 3:21 pm

Austin Harper wrote:
ElectricMonk wrote:But one thing we have learned recently is that just because you are a different specie doesn't mean you can't cross-bread: the mix of Homo Sapiens with other Homo species (as evident in the genes of non-Africans) shows that.

Is this the current thinking? I've also heard classifications in the past of our species as Homo sapiens sapiens and Neanderthals as Homo sapiens neanderthalensis making us both subspecies of the species H. sapiens.


We are just called Homo Sapiens and Neanderthals just Homo Neanderthalensis. The "double sapiens" description is no longer used.
Traditionally, a species is defined as a population that can create fertile offspring; but that definition has never been very precise as can be seen in various cross-breeds such as Lion-Tiger and others.

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Re: New species can develop in as little as two generations, Galapagos study finds

Post by Lance Kennedy » Wed Nov 29, 2017 6:17 pm

Cross breeding is a function of genetic similarity. Closely related species can cross breed. Those more distant cannot. Once, the inability to cross breed was what defined two species. Today, biologists realise things are just not that simple.

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