Low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.

Clonal species normally have low seed production, low recruitment rates and long lifespans, and it is expected that the rates of long-distance dispersal (LDD) of seeds will be low as well. Banksia candolleana is a clonal shrub in Mediterranean-type, fire-prone sclerophyll shrublands of southwestern...

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Autores principales:	Laura Merwin, Tianhua He, Byron B Lamont, Neal J Enright, Siegfried L Krauss
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8955e7b0b8324c0d9dac0c4a4c6bdb17
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spelling	oai:doaj.org-article:8955e7b0b8324c0d9dac0c4a4c6bdb172021-11-18T08:07:01ZLow rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.1932-620310.1371/journal.pone.0050974https://doaj.org/article/8955e7b0b8324c0d9dac0c4a4c6bdb172012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23209839/?tool=EBIhttps://doaj.org/toc/1932-6203Clonal species normally have low seed production, low recruitment rates and long lifespans, and it is expected that the rates of long-distance dispersal (LDD) of seeds will be low as well. Banksia candolleana is a clonal shrub in Mediterranean-type, fire-prone sclerophyll shrublands of southwestern Australia, whose reproductive biology and population dynamics contrast with those of co-occurring nonclonal congeneric species, all of which are restricted to a mosaic of sand dunes set within a matrix of inhospitable swales. Using microsatellite markers, we genotyped 499 plants in all 15 populations of B. candolleana within a 12-km(2) area, assessed population genetic differentiation, and quantified the effective rate of interpopulation seed dispersal through genetic assignment of individuals to populations. We measured life history, reproductive and demographic attributes, and compared these with two co-occurring Banksia species, a non-clonal resprouter and a nonsprouter. B. candolleana has much higher levels of population genetic differentiation, and one-third the rate of interpopulation seed migration, as the other two species (2.2% vs 5.5-6.8% of genotyped plants inferred to be immigrants), though distances reached by LDD are comparable (0.3-2.3 km). The low rate of interpopulation dispersal was supported by an analysis of the age structure of three populations that suggests a mean interdune migration rate of <800 m in 200 years, and 60% of suitable dunes remain uninhabited. Thus, B. candolleana has poor properties for promoting long-distance dispersal. It is unclear if these are idiosyncratic to this species or whether such properties are to be expected of clonal species in general where LDD is less critical for species survival.Laura MerwinTianhua HeByron B LamontNeal J EnrightSiegfried L KraussPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 11, p e50974 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Laura Merwin Tianhua He Byron B Lamont Neal J Enright Siegfried L Krauss Low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.
description	Clonal species normally have low seed production, low recruitment rates and long lifespans, and it is expected that the rates of long-distance dispersal (LDD) of seeds will be low as well. Banksia candolleana is a clonal shrub in Mediterranean-type, fire-prone sclerophyll shrublands of southwestern Australia, whose reproductive biology and population dynamics contrast with those of co-occurring nonclonal congeneric species, all of which are restricted to a mosaic of sand dunes set within a matrix of inhospitable swales. Using microsatellite markers, we genotyped 499 plants in all 15 populations of B. candolleana within a 12-km(2) area, assessed population genetic differentiation, and quantified the effective rate of interpopulation seed dispersal through genetic assignment of individuals to populations. We measured life history, reproductive and demographic attributes, and compared these with two co-occurring Banksia species, a non-clonal resprouter and a nonsprouter. B. candolleana has much higher levels of population genetic differentiation, and one-third the rate of interpopulation seed migration, as the other two species (2.2% vs 5.5-6.8% of genotyped plants inferred to be immigrants), though distances reached by LDD are comparable (0.3-2.3 km). The low rate of interpopulation dispersal was supported by an analysis of the age structure of three populations that suggests a mean interdune migration rate of <800 m in 200 years, and 60% of suitable dunes remain uninhabited. Thus, B. candolleana has poor properties for promoting long-distance dispersal. It is unclear if these are idiosyncratic to this species or whether such properties are to be expected of clonal species in general where LDD is less critical for species survival.
format	article
author	Laura Merwin Tianhua He Byron B Lamont Neal J Enright Siegfried L Krauss
author_facet	Laura Merwin Tianhua He Byron B Lamont Neal J Enright Siegfried L Krauss
author_sort	Laura Merwin
title	Low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.
title_short	Low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.
title_full	Low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.
title_fullStr	Low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.
title_full_unstemmed	Low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.
title_sort	low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/8955e7b0b8324c0d9dac0c4a4c6bdb17
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Low rate of between-population seed dispersal restricts genetic connectivity and metapopulation dynamics in a clonal shrub.

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