@article{HeinkenSchmidtvonOheimbetal.2006,
  author    = {Heinken, Thilo and Schmidt, Marcus and von Oheimb, Goddert and Kriebitzsch, Wolf-Ulrich and Ellenberg, Hermann},
  title     = {Soil seed banks near rubbing trees indicate dispersal of plant species into forests by wild boar},
  issn      = {1439-1791},
  doi       = {10.1016/j.baae.2005.04.006},
  year      = {2006},
  abstract  = {Current knowledge about processes that generate long-distance dispersal of plants is still limited despite its importance for persistence of populations and colonization of new potential habitats. Today wild Large mammals are presumed to be important vectors for long-distance transport of diaspores within and between European temperate forest patches, and in particular wild boars recently came into focus. Here we use a specific habit of wild boar, i.e. wallowing in mud and subsequent rubbing against trees, to evaluate epizoochorous dispersal of vascular plant diaspores. We present soil seed bank data from 27 rubbing trees versus 27 control trees from seven forest areas in Germany. The mean number of viable seeds and the plant species number were higher in soil samples near rubbing trees compared with control trees. Ten of the 20 most frequent species were more frequent, and many species exclusively appeared in the soil samples near rubbing trees. The large number of plant species and seeds - more than 1000 per tree - in the soils near rubbing trees is difficult to explain unless the majority were dispersed by wild boar. Hooked and bristly diaspores, i.e. those adapted to epizoochory, were more frequent; however, many species with unspecialized diaspores occurred exclusively near rubbing trees. As opposed to plant species closely tied to forests species which occur both in forest and open vegetation and non-forest species were more frequent near rubbing trees compared with controls. These findings are consistent with previous studies on diaspore loads in the coats and hooves of shot wild boars. However, our method allows to identify the transport of diaspores from the open landscape into forest stands, where they might especially emerge after disturbance, and a clustered distribution of epizoochorically dispersed seeds. Moreover, accumulation of seeds of wetness indicators near rubbing trees demonstrates directed dispersal of plant species inhabiting wet places among remote wallows.},
  language  = {en}
}
@misc{HeinkenvonOheimbSchmidtetal.2005,
  author    = {Heinken, Thilo and von Oheimb, Goddert and Schmidt, Marcus and Kriebitzsch, Wolf-Ulrich and Ellenberg, Hermann},
  title     = {Schalenwild breitet Gef{\"a}ßpflanzen in der mitteleurop{\"a}ischen Kulturlandschaft aus : ein erster {\"U}berblick},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-46522},
  year      = {2005},
  abstract  = {Im Norddeutschen Tiefland wurde die Ausbreitung von Gef{\"a}ßpflanzen durch Rehe, Dam- und Rothirsche sowie Wildschweine untersucht. Diese Tiere transportieren zahlreiche Pflanzenarten in teilweise erheblichen Mengen {\"u}ber gr{\"o}ßere Distanzen, sowohl durch den Kot nach Darmpassage (Endozoochorie) als auch durch Anheftung an Fell und Schalen (Epizoochorie). Besondere Bedeutung kommt dabei Wildschweinen zu, die potenziell fast alle Pflanzenarten ausbreiten k{\"o}nnen. Bevorzugt werden im Wald wie im Offenland vorkommende Pflanzen und Arten des Offenlands ausgebreitet, w{\"a}hrend Arten mit enger Waldbindung nur in geringem Maße transportiert werden. Zoochorie durch Schalenwild bietet Erkl{\"a}rungsans{\"a}tze sowohl f{\"u}r Ausbreitungsph{\"a}nomene wie auch f{\"u}r das weitgehend fehlende Ausbreitungspotenzial vieler Pflanzenarten. Der Einfluss des Schalenwilds auf die Artenzusammensetzung und Gef{\"a}ßpflanzen-Diversit{\"a}t in der mitteleurop{\"a}ischen Kulturlandschaft sollte in seine naturschutzfachliche Neubewertung miteinbezogen werden. Die Einschr{\"a}nkung von Aktionsradien der Tiere durch die Zerschneidung von Lebensr{\"a}umen sowie die Wildf{\"u}tterung k{\"o}nnen f{\"u}r Ausbreitungsprozesse bisher kaum beachtete Konsequenzen haben.},
  language  = {de}
}
@misc{HeinkenSchmidtvonOheimbetal.2006,
  author    = {Heinken, Thilo and Schmidt, Marcus and von Oheimb, Goddert and Kriebitzsch, Wolf-Ulrich and Ellenberg, Hermann},
  title     = {Soil seed banks near rubbing trees indicate dispersal of plant species into forests by wild boar},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-46476},
  year      = {2006},
  abstract  = {Current knowledge about processes that generate long-distance dispersal of plants is still limited despite its importance for persistence of populations and colonization of new potential habitats. Today wild large mammals are presumed to be important vectors for long-distance transport of diaspores within and between European temperate forest patches, and in particular wild boars recently came into focus. Here we use a specific habit of wild boar, i.e. wallowing in mud and subsequent rubbing against trees, to evaluate epizoic dispersal of vascular plant diaspores. We present soil seed bank data from 27 rubbing trees versus 27 control trees from seven forest areas in Germany. The mean number of viable seeds and the plant species number were higher in soil samples near rubbing trees compared with control trees. Ten of the 20 most frequent species were more frequent, and many species exclusively appeared in the soil samples near rubbing trees. The large number of plant species and seeds - approximated > 1000 per tree - in the soils near rubbing trees is difficult to explain unless the majority were dispersed by wild boar. Hooked and bristly diaspores, i.e. those adapted to epizoochory, were more frequent, above that many species with unspecialised diaspores occurred exclusively near rubbing trees. Different to plant species closely tied to forest species which occur both in forest and open vegetation, and non-forest species were more frequent near rubbing trees compared with controls. These findings are consistent with previous studies on diaspore loads in the coats and hooves of shot wild boars. However, our method allows to identify the transport of diaspores from the open landscape into forest stands where they might especially emerge after disturbance, and a clustered distribution of epizoochorically dispersed seeds. Moreover, accumulation of seeds of wetness indicators near rubbing trees demonstrates directed dispersal of plant species inhabiting wet places between remote wallows.},
  language  = {en}
}