|This article is of interest to the following WikiProjects:|
- 1 Diversity
- 2 Darwin's Finches
- 3 Empirical Methods Used to Study Adaptive Radiation
- 4 Question
- 5 Allopatric speciation
- 6 Drosophila
- 7 Mammalian evolution
- 8 Placentals
- 9 Evolutionary radiation
- 10 Cladogenesis
- 11 Bipedal example
- 12 Can someone fix the illustration?
- 13 A merge that wasn't
- 14 Hawaiian honeycreepers example
- 15 Phylogenetic tree
This article should probably put more emphasis on the idea that adaptive radiation is one of the leading causes of biological diversity. Through adaptive radiation, speciation occurs which creates a variety of new species with a variety of new traits. Even within a single population, adaptive radiation can cause that population to diversify genetically and morphologically. Diversity is one of the major observable results of adaptive radiation. — Preceding unsigned comment added by Behrens.42 (talk • contribs) 06:04, 1 October 2014 (UTC) --Behrens.42 (talk) 18:23, 13 October 2014 (UTC)
This page could also benefit from a strong example such as Darwin's finches. They probably best exemplify the process of adaptive radiation. As Darwin's finches were separated among the islands of the Galapagos, they evolved due to the differing environments they inhabited. One major change due to the divergence of the species involved their beak shape which changed according to the method used to obtain food — Preceding unsigned comment added by Behrens.42 (talk • contribs) 05:04, 1 October 2014 (UTC) --Behrens.42 (talk) 18:24, 13 October 2014 (UTC)
Empirical Methods Used to Study Adaptive Radiation
This page could benefit from a discussion of how adaptive radiation has been studied in the past. There are four main approaches which include fossils, phylogenetic comparative methods, microevolutionary studies of extant taxa, and adaptive radiation in the lab. Fossils allow us to study the changes in the clade of an extinct species. Phylogenetic comparative methods study the increasingly complete sets of phylogenies that have been developing over the past few decades. Microevolutionary studies of extant taxa looks into the specific traits and processes of a taxa to determine whether any of these factors could affect adaptive radiation. And finally adaptive radiation in the lab allows for experimental flexibility and makes it easier to control certain factors when studying adaptive radiation. — Preceding unsigned comment added by Behrens.42 (talk • contribs) 04:58, 1 October 2014 (UTC) --Behrens.42 (talk) 18:24, 13 October 2014 (UTC)
How does adaptive radiation differ from allopatric speciation? Allopatry begins when subpopulations of a species become isolated geographically (for example, by habitat fragmentation or migration). The isolated populations are then liable to diverge evolutionarily over many generations. RK 16:07, Aug 12, 2004 (UTC)
- Allopatry implies genetic isolation first, then divergence. Adaptive radiation, as I understand it, implies divergence by niche-separation. Lake Victoria is a common example - one species of fish diverges into many without first having genetic isolation simply because genetic variation partitions the population into various ecological niches where they need not compete or even interbreed. Graft 16:54, 12 Aug 2004 (UTC)
I quite agree that this article seems like it's talking about allopatric speciation except it also occasionally throws the word niche and describes the evolution as relatively rapid. Other than the first few sentances, I don't think this description is true to the real definition of adaptive radiation into different ecological niches. I think it's impossible to do so without a breif explanation of ecological niches within the article.
I changed the "Drosophila_affinidisjuncta" link to "Hawaiian Drosophilidae". It doesn't exist yet but sooner or later I'll get around to writing it. As it was it wasn't very useful. KarlM 06:35, 31 May 2006 (UTC)
I find the statement that monotremes and marsupials evolved from placental mammals very surprising. Is this right?
Just a note that Australia has indigenous rodent and bat species, so the mention of marsupials and monotremes being the only mammals present before human habitation is false.
Agreed, there were plenty of bats, rodents, dingos etc etc etc, so i deleted that line. --Hypo Mix 02:50, 13 November 2006 (UTC)
- This matter has been discussed at talk page for evolutionary radiation. +A.Ou 21:54, 11 February 2007 (UTC)
Should cladogenesis and adaptive radiation be merged?
This site about grazing horses talks briefly about adaptive radiation and cladogenesis, but I think it perverses the meanings in doing so. Then again, the original author of the cladogenesis article may have a twisted definition of cladogenesis in the first place....
Oxford dictionary says cladogenesis divides one species into two, while adaptive radiation does not restrain the number of divisions from one species. Just wanted your input (and then maybe I could move my Hawaiian archipelago addition in the cladogenesis article to the adaptive radiation article instead). Hkim43 04:22, 15 February 2007 (UTC)
I removed a recently added paragraph using "bipedal species...homo sapiens"" as an example. It doesn't seem immediately obvious that this illustrates the concept as described in the article - "rapid speciation...filling many ecological niches". - David Oberst 19:12, 18 February 2007 (UTC)
Can someone fix the illustration?
A merge that wasn't
Hawaiian honeycreepers example
Darwin's finches are a model species when studying avian island radiation, but the Hawaiian honeycreepers are an impressive example as well. It would be interesting to add a section about the rapid honeycreeper radiation throughout the Hawaiian islands. It is a well studied radiation with numerous different approaches in comparing phylogeny and determining how diverse the population became through adaptive radiation. Bennett.896 (talk) 20:25, 1 October 2014 (UTC)
It would be beneficial for readers to see a phylogenetic tree of a population that underwent adaptive radiation. Readers would be able to visualize how much diversity can emerge from a single ancestor. Bennett.896 (talk) 20:36, 1 October 2014 (UTC)