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Genetic characteristics of three Baltic Zostera marina populations

Gonciarz M., Wiktor J., Tatarek A., Węgleński P., Stanković A.

Oceanologia

2014

No. 56 (3)

549--564

We performed genetic analyses of three Baltic eelgrass (Zostera marina) populations in Puck Bay (PB), Cudema Bay (CB) and Greifswalder Bodden (GB). The aim of this study was to identify the eelgrass population genetically closest to that from the PB, which could potentially serve as a reservoir for the restoration of the underwater meadows in this bay, seriously degraded in the past. We applied a 12-microsatellite assay to test the genetic distance between the target eelgrass populations. We found that the allelic richness values of the GB, PB and CB populations were 2.25, 3.77 and 3.50 respectively. The genetic diversity found in GB was low and could be explained by the population's history, whereas the diversity of CB was higher than expected in a population located at the edge of the species' range. Analyses of genetic differentiation and structure showed that of the three populations studied, PB and CB were closer to each other than to the GB population. The reasons for this differentiation in eelgrass populations and the implications of the results of their genetic analysis on the planned restoration of the PB populations are discussed.

Analysis of microsatellite polymorphism and genetic differentiation in urban and rural kestrels Falco tinnunculus (L.)

Rutkowski Robert, Rejt Łukasz, Szczuka Anna

Polish Journal of Ecology

2006

Vol. 54, nr 3

473-480

The European Kestrel Falco tinnunculus (L.) is commonly observed in urban-industrial environment. Colonization of cites by the species was shown to be interlinked with changes in its ecology and breeding biology. Such adaptations can lead to isolation of urban populations from rural birds. In this paper we investigated genetic differentiation between birds from centre of Warsaw (Centre Group), suburban area of the city (Suburban Group) and one rural area (Rural Group). We analyse polymorphism of six microsatellite loci in 56 kestrels. The results shown moderate and significant differentiation between Centre and Rural groups and intermediate differentiation among Suburban and two other groups. Although our study is based on small number of individuals and only one rural sampling site, it suggested some level of isolation between city and rural environment. We assumed that observed differentiation might be the result of Urban Island system of appearance and maintenance of kestrel population in Warsaw. We also suspect that suburban areas of the city form a 'zone of admixture', where genes from the city and non-urban populations are 'meeting'.