Navigation Links
Adaptive radiation


Adaptive radiation describes the rapid speciation of a single or a few species to fill many ecological niches. This is an evolutionary process driven by mutation and natural selection.

Adaptive radiation often occurs when a species is introduced to a new ecosystem, or when a species can survive in an environment that was unreachable before. For example, the Darwin's finches on the Galapagos islands developed from a single species of finches that reached the islands. Other examples include the introduction of predatory mammals to Australia by humans, the development of the first birds, which suddenly were able to expand their territory into the air, or the development of lung fish during the Devonian period, about 300 million years ago.

The dynamics of adaptive radiation is such that, within a relatively short time, many species derive from a single or a few ancestor species. From this large number of genetic combinations, only a few can survive on long term. After the rapid development of many new species, lots or most of them die out as quickly as they appeared. The surviving species are almost perfectly adapted to the new environment. The rise and fall of new species is now progressing very slowly, compared to the initial outburst of species.

There are three basic types of adaptive radiation. They are :

  1. General adaptation. A species that develops a radically new ability can reach new parts of its environment. An example of general adaptation is bird flight.
  2. Environmental change. A species that can, in contrast to the other species in the ecosystem, successfully survive in a radically changed environment will probably branch into new species that cover the new ecological niches created by the environmental change. An example of adaptive radiation as the result of an environmental change is the rapid spread and development of mammalian species after the extinction of the dinosaurs.
  3. Archipelagoes. Isolated ecosystems, such as islands and mountain areas, can be colonized by a new species which upon establishing itself undergoes rapid divergent evolution. Darwin's finches are examples of adaptive radiation occurring in an archipelago.

In science fiction sometimes adaptive radiation of humans is imagined. This often makes for interesting multi-species worlds.


'"/>


(Date:7/9/2015)... , July 9, 2015  Synaptics Inc. (NASDAQ: ... announced today that it will report financial results for ... July 30, 2015 after the close of market. The ... and investors at 2:00 p.m. PT (5:00 p.m. ET), ... To participate on the live call, analysts and ...
(Date:7/8/2015)... LAKES , N.J. and NEW YORK ... Company) and Guidepoint today announced BD ... start-up healthcare companies with free access to Guidepoint,s expert ... several start-ups that are developing cutting-edge technologies to improve ... a dedicated Guidepoint research manager, each start-up entrepreneur will ...
(Date:7/7/2015)... 7, 2015 NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" ... mobile commerce market announces a revised version of one of its ... will air on CNBC in New York , ... and San Francisco metro areas.    ... Wocket,s ability to replace all the cards in your wallet and ...
Breaking Biology News(10 mins):Synaptics to Report Fourth Quarter, Fiscal Year 2015 Results on July 30 2BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 2BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 3Wocket Smart Wallet Commercials Airing on CNBC to Showcase This Summer's Must- Have Tech Product 2Wocket Smart Wallet Commercials Airing on CNBC to Showcase This Summer's Must- Have Tech Product 3
... an important discovery in the interdisciplinary study of split-brain research. ... left and right hemispheres. Split-brain research has been conducted ... processing is largely located in the left side of the ... an area processed by the right side of the ...
... between partners is a fundamental requisite in agricultural biotech ... from a four year study into what built or ... In a special supplement published in the UK-based journal ... from the Sandra Rotman Centre at the University Health ...
... been considered a major risk factor for cardiovascular disease. ... but the mechanisms of how arteries stave off hardening ... Perelman School of Medicine, University of Pennsylvania, Wistar Institute, ... the protein apolipoprotein E (apoE) plays a major role ...
Cached Biology News:UCSB scientists report 'new beginning' in split-brain research, using new analytical tools 2UCSB scientists report 'new beginning' in split-brain research, using new analytical tools 3UCSB scientists report 'new beginning' in split-brain research, using new analytical tools 4Study details essential role of trust in agricultural biotech partnerships 2Study details essential role of trust in agricultural biotech partnerships 3Study details essential role of trust in agricultural biotech partnerships 4Study details essential role of trust in agricultural biotech partnerships 5Study details essential role of trust in agricultural biotech partnerships 6Softening arteries, protecting the heart 2Softening arteries, protecting the heart 3
Other biology definitionOther Tags