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Adaptive radiation

Definition

noun

The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant adaptive zone


Supplement

Adaptive radiation is said to have occurred when an adaptive zone that is (or has become) vacant caused the ancestral species to diversify into a variety of related forms within a relatively short period of time. Each of them is adapted to fit to a particular environmental niche.

The common example of adaptive radiation is the honeycreepers in Hawaii. Since Hawaii is an island, there were fewer birds (thus, fewer competition for food) while several adaptive zones were available. Some of them evolved and had firmer, smaller beaks to rip away bark for insects; others had longer, curved beaks to sip nectar from tubular flowers.


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Re: Out of Africa Vs. Multiregional theory

... Of course as a species from an extant line which probably underwent adaptive radiation, it gets a bit complicated with the other, now extinct, human like species that were ...

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by NMLevesque
Fri Nov 22, 2013 6:01 pm
 
Forum: Evolution
Topic: Out of Africa Vs. Multiregional theory
Replies: 2
Views: 2173

Increasing Specialization Of Structure And Function Among An

... to it enviroment while the rest did not. The word 'adaptation or adaptive' without putting radiation is enough to convey the message to me. That word 'radiation' is just there to cause ...

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by chikis
Mon Feb 13, 2012 2:16 pm
 
Forum: Ecology
Topic: Increasing Specialization Of Structure And Function Among An
Replies: 4
Views: 3427

Increasing Specialization Of Structure And Function Among An

... the answer is 'B', no problem. I accept, but I thought the answer is A adaptive radiation. The reason being that; I have grown up to know and understand adaptation as a term ...

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by chikis
Mon Jan 30, 2012 5:02 pm
 
Forum: Ecology
Topic: Increasing Specialization Of Structure And Function Among An
Replies: 4
Views: 3427

Increasing Specialization Of Structure And Function Among An

... or order for survival in a new and different environment is called A. adaptive radiation B. phylogeny C. homology D. analogy E. ontogeny. The A-E options are confusing. If ...

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by chikis
Fri Jan 27, 2012 11:58 am
 
Forum: Ecology
Topic: Increasing Specialization Of Structure And Function Among An
Replies: 4
Views: 3427

Evolution questions

... is BEST explained by which of the following? a. Divergent evolution and adaptive radiation into new niches often result in convergent evolution. b. Fish, penguins, and dolphins ...

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by Ryosuke
Fri Nov 18, 2011 7:21 am
 
Forum: Evolution
Topic: Evolution questions
Replies: 1
Views: 5887
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