@misc{DrygalaKorablevAnsorgeetal.2016,
  author    = {Drygala, Frank and Korablev, Nikolay and Ansorge, Hermann and Fickel, J{\"o}rns and Isomursu, Marja and Elmeros, Morten and Kowalczyk, Rafał and Baltrunaite, Laima and Balciauskas, Linas and Saarma, Urmas and Schulze, Christoph and Borkenhagen, Peter and Frantz, Alain C.},
  title     = {Homogenous population genetic structure of the non-native raccoon dog (Nyctereutes procyonoides) in Europe as a result of rapid population expansion},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {540},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-41092},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-410921},
  pages     = {17},
  year      = {2016},
  abstract  = {The extent of gene flow during the range expansion of non-native species influences the amount of genetic diversity retained in expanding populations. Here, we analyse the population genetic structure of the raccoon dog (Nyctereutes procyonoides) in north-eastern and central Europe. This invasive species is of management concern because it is highly susceptible to fox rabies and an important secondary host of the virus. We hypothesized that the large number of introduced animals and the species' dispersal capabilities led to high population connectivity and maintenance of genetic diversity throughout the invaded range. We genotyped 332 tissue samples from seven European countries using 16 microsatellite loci. Different algorithms identified three genetic clusters corresponding to Finland, Denmark and a large 'central' population that reached from introduction areas in western Russia to northern Germany. Cluster assignments provided evidence of long-distance dispersal. The results of an Approximate Bayesian Computation analysis supported a scenario of equal effective population sizes among different pre-defined populations in the large central cluster. Our results are in line with strong gene flow and secondary admixture between neighbouring demes leading to reduced genetic structuring, probably a result of its fairly rapid population expansion after introduction. The results presented here are remarkable in the sense that we identified a homogenous genetic cluster inhabiting an area stretching over more than 1500km. They are also relevant for disease management, as in the event of a significant rabies outbreak, there is a great risk of a rapid virus spread among raccoon dog populations.},
  language  = {en}
}
@article{MuellerHeinzeJoshietal.2014,
  author    = {M{\"u}ller, J{\"o}rg and Heinze, Johannes and Joshi, Jasmin Radha and Boch, Steffen and Klaus, Valentin H. and Fischer, Markus and Prati, Daniel},
  title     = {Influence of experimental soil disturbances on the diversity of plants in agricultural grasslands},
  series = {Journal of plant ecology},
  volume    = {7},
  journal   = {Journal of plant ecology},
  number    = {6},
  publisher = {Oxford Univ. Press},
  address   = {Oxford},
  issn      = {1752-9921},
  doi       = {10.1093/jpe/rtt062},
  pages     = {509 -- 517},
  year      = {2014},
  abstract  = {Disturbance is supposed to play an important role for biodiversity and ecosystem stability as described by the intermediate disturbance hypothesis (IDH), which predicts highest species richness at intermediate levels of disturbances. In this study, we tested the effects of artificial soil disturbances on diversity of annual and perennial vascular plants and bryophytes in a field experiment in 86 agricultural grasslands differing in land use in two regions of Germany. On each grassland, we implemented four treatments: three treatments differing in application time of soil disturbances and one control. One year after experimental disturbance, we recorded vegetation and measured biomass productivity and bare ground. We analysed the disturbance response taking effects of region and land-use-accompanied disturbance regimes into account. Region and land-use type strongly determined plant species richness. Experimental disturbances had small positive effects on the species richness of annuals, but none on perennials or bryophytes. Bare ground was positively related to species richness of bryophytes. However, exceeding the creation of 12\% bare ground further disturbance had a detrimental effect on bryophyte species richness, which corresponds to the IDH. As biomass productivity was unaffected by disturbance our results indicate that the disturbance effect on species richness of annuals was not due to decreased overall productivity, but rather due to short-term lowered inter- and intraspecific competition at the newly created microsites. Generally, our results highlight the importance of soil disturbances for species richness of annual plants and bryophytes in agricultural grasslands. However, most grasslands were disturbed naturally or by land-use practices and our additional experimental soil disturbances only had a small short-term effect. Overall, total plant diversity in grasslands seemed to be more limited by the availability of propagules rather than by suitable microsites for germination. Thus, nature conservation efforts to increase grassland diversity should focus on overcoming propagule limitation, for instance by additional sowing of seeds, while the creation of additional open patches by disturbance might only be appropriate where natural disturbances are scarce.},
  language  = {en}
}
@misc{Heinken2004,
  author    = {Heinken, Thilo},
  title     = {Migration of an annual myrmecochore},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-5865},
  year      = {2004},
  abstract  = {A seed sowing experiment was conducted in a mixed secondary woodland on acidic soils in NE Germany with Melampyrum pratense, an annual ant-dispersed forest herb which lacks a natural population in the study area, but is abundant in similar habitats. Each set of 300 seeds was sown within one square metre at three sites in 1997, and the development of the populations was recorded from 1998 onward. Additionally, seed fall patterns were studied in a natural population by means of adhesive cardboard. All trials resulted in the recruitment of populations, which survived and increased in both individual number and area, up to the year 2001. Thus, local distribution of Melampyrum pratense is dispersallimited. Total individual number increased from 105 to 3,390, and total population area from 2.07 to 109.04 m². Migration occurred in all directions. Mean migration rate was 0.91 m per year, and the highest migration rate was 6.48 m. No individual was recorded beyond 7.63 m from the centres of the sawn squares after three years, suggesting exclusive short-distance dispersal. As primary dispersal enables only distances of up to 0.25 m, ants are presumed to be the main dispersal vectors. Despite differences in individual number and colonization patterns, migration rates did not differ significantly between the populations, but were significantly higher in 2001 due to an increased population size. Colonization patterns were characterized by a rapid, negative exponential decrease of population density with increasing distance from the sown plot, suggesting a colonization by establishment of more or less isolated outposts of individuals and a subsequent gradual infill of the gaps between. My results resemble myrmecochorous dispersal distances in temperate woodlands, and migration rates and patterns across ecotones from ancient to recent deciduous forests. They may function as a colonization model of Melampyrum pratense after accidental long-distance dispersal.},
  language  = {en}
}
@misc{Schulz2002,
  type      = {Master Thesis},
  author    = {Schulz, Frank},
  title     = {'How can you go to a Church that killed so many Indians?' : Representations of Christianity in 20th century Native American novels},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-0001154},
  school      = {Universit{\"a}t Potsdam},
  year      = {2002},
  abstract  = {Die vorliegende Arbeit untersucht Romane indianischer Autorinnen und Autoren des 20. Jahrhunderts hinsichtlich ihrer Repr{\"a}sentation von Konflikten zwischen amerikanischen Ureinwohnern und der vorherrschenden christlichen Religion des allgemeinen gesellschaftlichen Umfelds. Verschiedene Schwerpunkte sind zu erkennen, die im Laufe des Jahrhunderts immer wieder dargestellt und in ver{\"a}nderter Perspektive betrachtet werden. Sowohl historische Konflikte der Kolonialisierung und Christianisierung als auch die immerw{\"a}hrende Frage indianischer Christen -- 'Wie kannst Du in eine Kirche gehen, die so viele Indianer umgebracht hat?' [Alexie, Reservation Blues] -- werden in den Romanen diskutiert und in meiner Arbeit analysiert. Es wird ferner versucht, eine literaturgeschichtliche Klassifizierung der einzelnen Werke entsprechend ihrer Repr{\"a}sentation dieser Probleme vorzunehmen. In Anlehnung an Charles Larsons chronologisch-thematische Darstellung indianischer Prosa, werden die Kategorien rejection, (syncretic) adaptation, and postmodern-ironic revision eingef{\"u}hrt, um die unterschiedlichen Darstellungsweisen zu beschreiben. Anhand der f{\"u}nf Hauptbeispiele ist eine Entwicklung der zeitgen{\"o}ssischen indianischen Literatur zu beobachten, die sich von der engen Definition der 1960er und 70er Jahre zugunsten eines breiteren und vielf{\"a}ltigeren Ansatzes l{\"o}st und dabei mittels interkultureller und intertextueller Referenzen, postmoderner Ironie, und einem neuen indianischen Selbstbewußtsein auch neue Positionen gegen{\"u}ber dem Glauben der einstigen Kolonialmacht einnimmt. Gutachter / Betreuer: Prof. R{\"u}diger Kunow ; Dr. J{\"u}rgen Heiß},
  language  = {en}
}