Outcomes of reciprocal invasions between genetically diverse and genetically uniform populations of Daphnia obtusa (Kurz)


Tagg, N., Innes, D.J. and Doncaster, C.P. (2005) Outcomes of reciprocal invasions between genetically diverse and genetically uniform populations of Daphnia obtusa (Kurz). Oecologia, 143, (4), 527-536. (doi:10.1007/s00442-005-0016-5).

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Description/Abstract

Ecological theory predicts that genetic variation produced by sexual reproduction results in niche diversification and provides a competitive advantage both to facilitate invasion into genetically uniform asexual populations and to withstand invasion by asexual competitors. We tested the hypothesis that a large group of diverse clones of Daphnia obtusa has greater competitive advantage when invading into genetically uniform populations of this species than a smaller group with inherently less genetic diversity. We compared competitive outcomes to those of genetically uniform groups of small and large size invading into genetically diverse populations. Genetically diverse invaders of initially large group size increased their representation by more than those of initially small size; in contrast, genetically uniform invaders of initially large group size diminished on average by more than those of initially small size. These results demonstrate an advantage to the genetic variation produced by to sexual reproduction, both in invasion and resisting invasion, which we attribute to competitive release experienced by individuals in genetically diverse populations.

Item Type: Article
ISSNs: 0029-8549 (print)
Related URLs:
Subjects: Q Science > QL Zoology
Q Science > QH Natural history > QH426 Genetics
Divisions: University Structure - Pre August 2011 > School of Biological Sciences
ePrint ID: 66489
Date Deposited: 24 Jun 2009
Last Modified: 27 Mar 2014 18:47
Contact Email Address: cpd@soton.ac.uk
URI: http://eprints.soton.ac.uk/id/eprint/66489

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