Genetic and behavioural divergence among desert spring amphipod populations

Perry E. Thomas, Dean W. Blinn, Paul S Keim

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

1. Random amplification of polymorphic DNA (RAPD) analyses and behavioural trials were conducted on eleven Hyalella azteca populations and one population of H. montezuma from lakes and springs across northern Arizona, U.S.A. Genetic distances among populations were calculated based on fifty-five RAPD markers. 2. A cluster analysis indicated two genetic lineages among the Hyalella populations. One group consisted of populations inhabiting lakes with submerged vegetation, while a second group consisted of populations that clung to roots of emergent vegetation. Behaviour also diverged between these two groups in laboratory trials: amphipods from the submerged vegetation lineage spent significantly more time swimming than did those from the emergent vegetation lineage. 3. Based on patterns in genetic distance data, it is suggested that a xeric landscape may promote diversity among passively dispersed invertebrates.

Original languageEnglish (US)
Pages (from-to)137-143
Number of pages7
JournalFreshwater Biology
Volume38
Issue number1
StatePublished - Aug 1997

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amphipod
Amphipoda
submerged vegetation
deserts
desert
divergence
amplification
DNA
vegetation
lake
genetic distance
cluster analysis
invertebrate
Hyalella
Thespesia
Hyalella azteca
lakes
invertebrates
genetic markers
trial

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Genetic and behavioural divergence among desert spring amphipod populations. / Thomas, Perry E.; Blinn, Dean W.; Keim, Paul S.

In: Freshwater Biology, Vol. 38, No. 1, 08.1997, p. 137-143.

Research output: Contribution to journalArticle

Thomas, Perry E. ; Blinn, Dean W. ; Keim, Paul S. / Genetic and behavioural divergence among desert spring amphipod populations. In: Freshwater Biology. 1997 ; Vol. 38, No. 1. pp. 137-143.
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