adaptive radiation


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adaptive radiation

Ecology
The evolution of new species or sub-species to fill unoccupied ecological niches.
 
Evolutionary biology
A species-wide diversification in genotype in an environment, resulting in multiple specialised, phenotypically distinct forms, each with survival advantages.

adaptive radiation

the evolution from an ancestral form of a wide range of related species occupying and exploiting many different types of available habitat. For example, mammals, evolving from the Tertiary period, have occupied many habitats and now have flying, running, swimming and burrowing forms, which often show changes to the PENTADACTYL LIMB structure.
References in periodicals archive ?
The evolution of the Indian ocean parrots (Psittaciformes): Extinction, adaptive radiation and eustacy.
From other work, both absolute nutrient levels and complexity are known to affect the adaptive radiation of P.
Gentry (1982) sustained that high diversity of tropical flora cannot be explained by a gradual diversification but by an explosive speciation and adaptive radiation. Key innovations such as pollination shifts can alter the evolutionary success of lineages (Vamosi & Vamosi, 2010).
What the researchers discovered looked nothing like adaptive radiation.
Molecular systematics and adaptive radiation of Hawaii's endemic damselfly genus Megalagrion (Odonata: Coenagrionidae).
Real time image guidance and adaptive radiation therapy involves constantly imaging the motion of the tumour during treatment delivery and changing beam delivery on the fly to compensate for undesired motion.
This solution which includes the CT Vision system, Intelligent treatment replanning software, Artiste Linear Accelerator and 160 Leaf Multileaf Collimator is a revolutionary solution for advanced form of radiation therapy treatment - Adaptive Radiation Therapy (ART).
Bromeliads appear to have begun invading drier areas in Central and South America beginning roughly 15 million years ago, at the same time as bromeliads underwent a major adaptive radiation involving the repeated evolution of epiphytism, CAM photosynthesis, impounding leaves, several features of leaf and trichome anatomy, and an accelerated rate at which new genera subsequently appeared.
Recent studies, such as those on cichlid fish, (2) have shed new light on the numerous patterns and mechanisms for rapid speciation and adaptive radiation. In the end, the challenge of the spore and pollen distribution does not rely on perfect knowledge of how angiosperms may or may not have evolved, but on the fact that they represent, at a minimum, a highly coordinated set of evidences of sequential stages of the origins of different organisms on Earth.
Another benefit of this design is the ability to quickly and easily reposition the patient multiple times during adaptive radiation therapy.
Much like Darwin's finches in the Galapagos, this rapid evolution seems to have been shaped by the species' interactions with their environments--a process called adaptive radiation.

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