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

Record type: Article

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.

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Citation

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), pp. 527-536. (doi:10.1007/s00442-005-0016-5).

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Published date: May 2005

Identifiers

Local EPrints ID: 66489
URI: http://eprints.soton.ac.uk/id/eprint/66489
ISSN: 0029-8549
PURE UUID: 4c067d95-6be4-4b05-9edf-9fa2b45d154a
ORCID for C.P. Doncaster: ORCID iD orcid.org/0000-0001-9406-0693

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Date deposited: 24 Jun 2009
Last modified: 19 Jul 2017 00:24

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Contributors

Author: N. Tagg
Author: D.J. Innes
Author: C.P. Doncaster ORCID iD

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