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Titel (primär) Untersuchungen zur Populationsgenetik und Besiedlung der Niederlausitz am Beispiel des Sandohrwurmes Labidura riparia
Titel (sekundär) Landschaft im Wandel. Natürliche und anthropogene Besiedlung der Niederlausitzer Bergbaufolgelandschaft
Autor Güth, M.; Wiegleb, G.; Durka, W. ORCID logo
Herausgeber Wöllecke, J.; Anders, K.; Durka, W.; Elmer, M.; Wanner, M.; Wiegleb, G.
Quelle Berichte aus der Biologie
Erscheinungsjahr 2007
Department BZF
Seite von 145
Seite bis 160
Sprache deutsch
Keywords earwig, Labidura riparia, population structure, microsatellites, colonization, postmining- Jandscape, Lower Lusatia
Abstract

Secondary habitats, like open cast mines, represent ideal cases for the study of colonization process in the course of ongoing succession. We used molecular methods to study the population structure of the earwig Labidura riparia (Pallas 1772, Dermaptera) in the post-mining landscape in Lower Lusatia. Genetic diversity of highly polymorphic microsatellite markers was analysed in earwig populations of disturbed secondary habitats, i.e. post-mining landscapes (PML) and former military training areas (MTA) and of primary habitats from coastal and inland sand dunes. The earwig is a rare habitat specialist and inhabits sandy but damp sites free of vegetation or with sparse vegetation. First, observations of L. riparia in Lusatia were made in the middle of last century in secondary habitats like open cast mines or sand and gravel pits. Out of 21 investigated populations those from secondary habitats have higher number of alleles and higher gene diversity than populations from primary habitats. Genetic depletion at secondary habitats due to bottlenecks was not evident. Age of sampling site and type of succession (PML sites with primary succession, MTA with secondary succession) had no impact on gene diversity. A correlation between geographic distance and genetic distances indicates that ongoing gene flow counterbalances genetic drift:. The two primary habitats, coastal and inland dunes were significantly different indicating strong isolation among these spatially distant habitats. Some alleles were missing in coastal populations which may be due to demographic bottlenecks. Secondary habitats (PML, MT A) were more closely related to inland dune than to the coastal populations which suggests that earwigs which colonised Lusatia did not come from coastal populations but probably from an inland dune (Klein Schmölen) near river Elbe. The results suggest that Labidura riparia individuals can overcome larger distances, possibly by flying. Due to their large population size and high genetic variability the Labidura riparia populations of the post mining landscape may become source habitats for further colonizations.

dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=1821
Güth, M., Wiegleb, G., Durka, W. (2007):
Untersuchungen zur Populationsgenetik und Besiedlung der Niederlausitz am Beispiel des Sandohrwurmes Labidura riparia
In: Wöllecke, J., Anders, K., Durka, W., Elmer, M., Wanner, M., Wiegleb, G. (Hrsg.)
Landschaft im Wandel. Natürliche und anthropogene Besiedlung der Niederlausitzer Bergbaufolgelandschaft
Berichte aus der Biologie
Shaker, Aachen, S. 145 - 160