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 (mī′krō-ĕv′ə-lo͞o′shən, -ē′və-)
Small-scale evolution consisting of genetic changes occurring usually within a single species and over a shorter period of time than in macroevolution.

mi′cro·ev′o·lu′tion·ar′y adj.


1. (Biology) evolutionary change over a short period
2. (Biology) evolutionary change on a small scale


(ˌmaɪ kroʊˌɛv əˈlu ʃən; esp. Brit. -ˌi və-)

evolutionary change involving the gradual accumulation of mutations leading to new varieties within a species.
mi`cro•ev`o•lu′tion•ar′y, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.microevolution - evolution resulting from small specific genetic changes that can lead to a new subspecies
organic evolution, phylogenesis, phylogeny, evolution - (biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organisms
References in periodicals archive ?
Mitochondrial DNA evolution at a turtle's pace: Evidence for low genetic variability and reduced microevolutionary rate in the Testudines.
The proposed research has potential for groundbreaking results in evolutionary ecology, as the results will increase our understanding of 1) how individual responses to unfavorable environmental conditions and the underlying mechanisms vary within and among local populations in a spatially and temporally heterogeneous environment, and 2) how the consequent life-history variation influences the ecological and microevolutionary dynamics of wild populations.
The book begins by defining the field of landscape genetics, first generally as a fusion of landscape ecology and population genetics, and then more specifically in terms of microevolutionary processes and types of analytic techniques.
2012), allowing the evaluation of gene flow, migration rates, isolation among populations, and other microevolutionary processes related with genetic differentiation (for a review see Hufbauer and Roderick, 2005).
From a microevolutionary perspective, this would result if mutation rates are slow and insufficient time has elapsed for lineage sorting to complete (Rannala & Michalakis 2003).
If the same study is conducted on the same population group after several years, it will help to identify the microevolutionary changes.
Estimate heritability of size at maturity in a microevolutionary context, and evaluate how natural selection drives changes in the size at maturity.
The knowledge of the occurrence would be crucial for the diagnosis and management of pertrochanteric fractures and also in the study of microevolutionary trends in the anthropometric and comparative studies of humans.
The ability to extend genomic analysis back in time in many marine fish species therefore promises to provide important new insights about microevolutionary processes in natural populations over the years to come.
Microevolutionary analysis of Clostridium difficile genomes to investigate transmission.
Nevertheless, differences in sequences (multiple genotypes) can also be obtained in a single origin polyploid by introgression with a progenitor or by microevolutionary changes post polyploidization (Sessa et al.