Latitudinal variability in spatial genetic structure in the invasive ascidian, Styela plicata

Autor:	Gwendolyn K. David, Dustin J. Marshall, Cynthia Riginos
Rok vydání:	2010
Předmět:	Genetic diversity Ecology Population genetics Aquatic Science Biology Spatial distribution biology.organism_classification Styela plicata Genetic variation Genetic structure Biological dispersal Spatial variability Ecology Evolution Behavior and Systematics
Zdroj:	Marine Biology. 157:1955-1965
ISSN:	1432-1793 0025-3162
DOI:	10.1007/s00227-010-1464-y
Popis:	Increases in temperature can shorten planktonic larval durations, so that higher temperatures may reduce dispersal distances for many marine animals. To test this prediction, we first quantified how minimum time to settlement is shortened at higher temperatures for the ascidian Styela plicata. Second, using latitude as a correlate for ocean temperature and spatial genetic structure as a proxy for dispersal, we tested for a negative correlation between latitude and spatial genetic structure within populations, as measured by anonymous DNA markers. Spatial genetic structure was variable among latitudes, with significant structure at low and intermediate latitudes (high and medium temperatures) and there was no genetic structure within high-latitude (low temperature) populations. In addition, we found consistently high genetic diversity across all Australian populations, showing no evidence for recent local bottlenecks associated S. plicata’s history as an invasive species. There was, however, significant genetic differentiation between all populations indicating limited ongoing gene flow.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::85149b09e1a2f96c4968aa36d7451ef5 https://doi.org/10.1007/s00227-010-1464-y Zobrazit plný text záznamu Plný text ve formátu PDF