@article{TschoepeTielboerger2010,
  author    = {Tsch{\"o}pe, Okka and Tielb{\"o}rger, Katja},
  title     = {The role of successional stage and small-scale disturbance for establishment of pioneer grass Corynephorus canescens},
  issn      = {1402-2001},
  doi       = {10.1111/j.1654-109X.2009.01072.x},
  year      = {2010},
  abstract  = {Question Which mechanisms promote the maintenance of the protected pioneer grass Corynephorus canescens in a mosaic landscape? Which are the interactive effects of small-scale disturbances, successional stage and year-to-year variation on early establishment probabilities of C. canescens? Location Brandenburg, NE Germany. Methods We measured emergence and survival rates over 3 yr in a sowing-experiment conducted in three successional stages (C. canescens- dominated site, ruderal forb site and pioneer forest) under two different regimes of mechanical ground disturbance (disturbed versus undisturbed control). Results Overall, disturbance led to higher emergence in a humid year and to lower emergence in a very dry year. Apparently, when soil moisture was sufficient, the main factor limiting C. canescens' establishment was competition, while in the dry year, water became the limiting factor. Survival rates were not affected by disturbance. In humid years, C. canescens emerged in higher numbers in open successional stages while in the dry year, emergence rates were higher in late stages, suggesting an important role of late successional stages for the persistence of C. canescens. Conclusions Our results suggest that small-scale disturbances can promote germination of C. canescens. However, disturbances should be carefully planned. The optimal strategy for promoting C. canescens is to apply disturbances just before seed dispersal and not during dry years. At the landscape scale, a mosaic of different vegetation types is beneficial for the protected pioneer grass as facilitation by late-successional species may be an important mechanism for the persistence of C. canescens, especially in dry years.},
  language  = {en}
}
@article{TschoepeWallschlaegerBurkartetal.2011,
  author    = {Tsch{\"o}pe, Okka and Wallschl{\"a}ger, Hans-Dieter and Burkart, Michael and Tielb{\"o}rger, Katja},
  title     = {Managing open habitats by wild ungulate browsing and grazing a case-study in North-Eastern Germany},
  series = {Applied vegetation science : official organ of the International Association for Vegetation Science},
  volume    = {14},
  journal   = {Applied vegetation science : official organ of the International Association for Vegetation Science},
  number    = {2},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {1402-2001},
  doi       = {10.1111/j.1654-109X.2010.01119.x},
  pages     = {200 -- 209},
  year      = {2011},
  abstract  = {Question: Can wild ungulates efficiently maintain and restore open habitats? Location: Brandenburg, NE Germany. Methods: The effect of wild ungulate grazing and browsing was studied in three successional stages: (1) Corynephorus canescens-dominated grassland; (2) ruderal tall forb vegetation dominated by Tanacetum vulgare; and (3) Pinus sylvestris-pioneer forest. The study was conducted over 3 yr. In each successional stage, six paired 4 m(2)-monitoring plots of permanently grazed versus ungrazed plots were arranged in three random blocks. Removal of grazing was introduced de novo for the study. In each plot, percentage cover of each plant and lichen species and total cover of woody plants was recorded. Results: Wild ungulates considerably affected successional pathways and species composition in open habitats but this influence became evident in alteration of abundances of only a few species. Grazing effects differed considerably between successional stages: species richness was higher in grazed versus ungrazed ruderal and pioneer forest plots, but not in the Corynephorus sites. Herbivory affected woody plant cover only in the Pioneer forest sites. Although the study period was too short to observe drastic changes in species richness and woody plant cover, notable changes in species composition were still detected in all successional stages. Conclusion: Wild ungulate browsing is a useful tool to inhibit encroachment of woody vegetation and to conserve a species-rich, open landscape.},
  language  = {en}
}
@article{TschoepeTielboergerBurkart2002,
  author    = {Tsch{\"o}pe, Okka and Tielb{\"o}rger, Katja and Burkart, Michael},
  title     = {Offenlandmanagement auf ehemaligen Truppen{\"u}bungspl{\"a}tzen},
  year      = {2002},
  language  = {de}
}
@article{TschoepeBurkartTielboerger2002,
  author    = {Tsch{\"o}pe, Okka and Burkart, Michael and Tielb{\"o}rger, Katja},
  title     = {Habitat management in former military training area by means of Megaherbivores},
  year      = {2002},
  language  = {en}
}