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ID: 206731.0, MPI für Evolutionsbiologie / Ecophysiology
Size and estimated age of genets in eelgrass, Zostera marina, assessed with microsatellite markers
Authors:Reusch, T. B. H.; Stam, W. T.; Olsen, J. L.
Date of Publication (YYYY-MM-DD):1998-04
Title of Journal:Marine Biology
Start Page:519
End Page:525
Review Status:not specified
Audience:Not Specified
Abstract / Description:We examined the spatial distribution of genotypes in a perennial population of eelgrass, Zostera marina L., at two spatial scales. We mapped and sampled 80 ramets in a subtidal area of 20 x 80 m, and an additional 15 ramets in two 1-m(2) sub-quadrats. Ramets were genotyped for seven polymorphic microsatellite loci. Among a total number of 54 genotypes detected, 12 occurred more than once. The ramets of ten of these genotypes occurred in clusters and represented genets based on their expected multi-locus genotype frequencies. The size distribution of genets was uneven with estimated ramet numbers ranging from 2 to 5000. Whereas some areas displayed a high genet diversity, which may indicate past disturbances, large genets (greater than or equal to 10 m(2)) predominated in other locations of the sampled plot. Spatial heterogeneity in clone distribution was also obvious at the smaller sampling scale (15 ramets sam.. pled within m(2)) were the clonal diversity (genets identified/ramets sampled) was 0.24 in one quadrat, and 0.077 in the ether. Ramets belonging to the largest clone were maximally 17 In apart, which corresponds to a genet age of 67 yr based on annual rhizome growth rates. We conclude that the spatial arrangement of clones in seagrasses allows inferences about the past demography and the disturbance regime at a given site which may prove useful for coastal zone management of ecologically valuable seagrass meadows.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Evolutionsbiologie/Abt. Ökophysiologie
External Affiliations:Univ Groningen, Dept Marine Biol, Haren, NL-9750 AA Netherlands
Identifiers:ISSN:0025-3162 [ID-No:1]
LOCALID:S 38212 [S-Nummer]
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