Journalartikel

Jahr der Veröffentlichung: 2005

Seiten: 389-405

Zeitschrift: Ecological Modelling

Bandnummer: 186

Heftnummer: 4

ISSN: 0304-3800

DOI Link: https://doi.org/10.1016/j.ecolmodel.2005.02.009

Verlag: Elsevier

Abstract: 

Identifying the key processes
affecting movement behaviour is essential to understand the high
variability of dispersal rates and their influence on population
dynamics in most arthropod communities. Biological characteristics of
the species, the type and the size of local landscape elements and their
spatial arrangements are important for the dispersal of epigeic
arthropods.

We developed two individual-based models to
investigate dispersal activities of ground beetles (Coleoptera:
Carabidae). The first model was used for simulation experiments with
high numbers of the forest carabid Carabus coriaceus dispersing
through heterogeneous habitats. In these experiments the effects of
local spatial resistance on movement was varied and the subsequent
reaction on the dispersal pattern was measured. The results indicated
that local spatial resistance determined the ability of ground beetles
to colonise new habitats and had an important impact on the spatial
distribution of the population.

In a second model, the
connectivity of landscape elements, such as hedgerows and stepping
stones, was investigated for the forest carabids Abax parallelepipedus and Carabus hortensis. We demonstrated that for Abax parallelepipedus
the width of the hedgerows determines the dispersal success.
Reproduction success in the local landscape elements was found a key
factor: it had to be higher than the potential losses by movements onto
suboptimal habitats. With Carabus hortensis, a faster
disperser, the simulations illustrated that hedgerows and stepping
stones were of less importance. Due to its lower densities and a higher
probability to cross large suboptimal areas, stochastic processes gained
in importance for dispersal.

Linking the individual properties
and behavioural reactions to landscape structure facilitated the
possibility to understand complex arthropod dispersal processes at the
population level. The results indicated the necessity to analyse the
dynamics of dispersal processes on broader spatio-temporal scales over
several generations.

Harvard-Zitierstil: Jopp, F. and Reuter, H. (2005) Dispersal of carabid beetles—emergence of distribution patterns, Ecological Modelling, 186(4), pp. 389-405. https://doi.org/10.1016/j.ecolmodel.2005.02.009

APA-Zitierstil: Jopp, F., & Reuter, H. (2005). Dispersal of carabid beetles—emergence of distribution patterns. Ecological Modelling. 186(4), 389-405. https://doi.org/10.1016/j.ecolmodel.2005.02.009