Journalartikel

Jahr der Veröffentlichung: 2006

Seiten: 17-25

Zeitschrift: Limnologica: Ecology and Management of Inland Waters

Bandnummer: 36

Heftnummer: 1

DOI Link: https://doi.org/10.1016/j.limno.2005.10.003

Verlag: Elsevier

Abstract: 

The Great Ramshorn (Planorbarius corneus L.) is a frequent
inhabitat of central European wetlands and floodplains. The dispersal capacity
of P. corneus, as a key factor to survival, was analysed using
different computer model approaches: a general equation-based model and an
individual-based model. Both models came to different conclusions on the
maximum covered distances of P. corneus-individuals. The
parametrisation of the models were based on detailed laboratory measurements
and field experiments performed with specimen of the fen wetland system of
Rhin-Havelluch (Brandenburg, North-East Germany). Based on the results of the
statistical analysis, the dispersal behaviour could be depicted in the
equation-based model as a random walk which implied a relatively regular
resource utilisation in long-term simulations.

Depicting the dispersal qualities of P. corneus with a highly
resolved individual-based model showed distinct local aggregations clusters of
the snail-individuals. As a consequence, the resource utilisation was less
regularly in the long-term simulations for the individual-based model than it
was in the equation-based model. Another characteristic of the individual-based
representation was that in the case of several consecutive move steps and based
on the autocorrelation of the data the P. corneus-individuals could
use a wider area of space.

The data from the empirical measurements of short-term dispersal
observations of single individuals were integrated within the different model
extrapolations. This made it possible to discuss the long-term consequences,
like the large dispersal range of the individuals and the spatial distribution
of the population in the plane, for the persistence of P. corneus in a
real landscape.

Harvard-Zitierstil: Jopp, F. (2006) Comparative studies on the dispersal of the Great Ramshorn (Planorbarius corneus L.): A modelling approach, Limnologica: Ecology and Management of Inland Waters, 36(1), pp. 17-25. https://doi.org/10.1016/j.limno.2005.10.003

APA-Zitierstil: Jopp, F. (2006). Comparative studies on the dispersal of the Great Ramshorn (Planorbarius corneus L.): A modelling approach. Limnologica: Ecology and Management of Inland Waters. 36(1), 17-25. https://doi.org/10.1016/j.limno.2005.10.003