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Molecular Ecology (2005) 14, 26692681 doi: 10.1111/j.1365-294X.2005.02640.x 2005 Blackwell Publishing Ltd
 

Summary: Molecular Ecology (2005) 14, 2669­2681 doi: 10.1111/j.1365-294X.2005.02640.x
© 2005 Blackwell Publishing Ltd
Blackwell Publishing, Ltd.
Within-population spatial genetic structure, neighbourhood
size and clonal subrange in the seagrass Cymodocea nodosa
FILIPE ALBERTO,* LICÍNIA GOUVEIA,* SOPHIE ARNAUD-HAOND,* JOSÉ L. PÉREZ-LLORÉNS,
CARLOS M. DUARTE and ESTER A. SERRÃO*
*CCMAR, CIMAR-Laboratório Associado, University of Algarve, Campus de Gambelas, 8005­139 Faro, Portugal, Area de Ecología,
Universidad de Cadiz, Facultad de Ciencias del Mar y Ambientales, 11510 Puerto Real, Cadiz, Spain, IMEDEA (CSIC-UIB) Instituto
Mediterraneo de Estudios Avanzados, C/Miquel Marques 21, 07190 Esporles, Mallorca, Spain
Abstract
The extent of clonality within populations strongly influences their spatial genetic struc-
ture (SGS), yet this is hardly ever thoroughly analysed. We employed spatial autocorrela-
tion analysis to study effects of sexual and clonal reproduction on dispersal of the dioecious
seagrass Cymodocea nodosa. Analyses were performed both at genet level (i.e. excluding clonal
repeats) and at ramet level. Clonal structure was characterized by the clonal subrange, a
spatial measure of the linear limits where clonality still affects SGS. We show that the
clonal subrange is equivalent to the distance where the probability of clonal identity
approaches zero. This combined approach was applied to two meadows with different
levels of disturbance, Cadiz (stable) and Alfacs (disturbed). Genotypic richness, the

  

Source: Alberto, Filipe - Centro de Ciencias do Mar, Universidade do Algarve

 

Collections: Environmental Sciences and Ecology; Biology and Medicine