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Titolo:
Phylogeography of the intertidal copepod Tigriopus californicus reveals substantially reduced population differentiation at northern latitudes
Autore:
Edmands, S;
Indirizzi:
Univ Oregon, Dept Biol, Eugene, OR 97403 USA Univ Oregon Eugene OR USA 97403 v Oregon, Dept Biol, Eugene, OR 97403 USA
Titolo Testata:
MOLECULAR ECOLOGY
fascicolo: 7, volume: 10, anno: 2001,
pagine: 1743 - 1750
SICI:
0962-1083(200107)10:7<1743:POTICT>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
OUTBREEDING DEPRESSION; ICE AGES; DNA; SPECIATION; BIOGEOGRAPHY; DIVERGENCE; AMPLIFICATION; ALLOZYME; DISTANCE;
Keywords:
biogeography; isolation-by-distance; mitochondrial DNA; range expansion; refugia; stepping stone;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Edmands, S Univ So Calif, Dept Biol Sci, AHF 107, Los Angeles, CA 90089 USA Univ So Calif AHF 107 Los Angeles CA USA 90089 es, CA 90089 USA
Citazione:
S. Edmands, "Phylogeography of the intertidal copepod Tigriopus californicus reveals substantially reduced population differentiation at northern latitudes", MOL ECOL, 10(7), 2001, pp. 1743-1750

Abstract

Previous studies of the intertidal copepod Tigriopus californicus revealedone of the highest levels of mitochondrial DNA differentiation ever reported among conspecific populations. The present study extends the geographical sampling northward, adding populations from northern California to south-east Alaska. The mitochondrial phylogeny for the entire species range, based on cytochrome oxidase I sequences for a total of 49 individuals from 27 populations, again shows extreme differentiation among populations (up to 23%). However, populations from Oregon northwards appear to be derived and have interpopulation divergences five times lower than those between southernpopulations. Furthermore, although few individuals were sequenced from each locality, populations from Puget Sound northward had significantly reduced levels of within-population variation. These patterns are hypothesized toresult from the contraction and expansion of populations driven by recent ice ages.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 09:46:03