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Movement patterns of the bush cricket Platycleis albopunctata in different types of habitat: matrix is not always matrix

Hein, S., Gombert, J., Hovestadt, T., Poethke, H.J.
Ecological entomology 2003 v.28 no.4 pp. 432-438
Tettigoniidae, dispersal behavior, habitats, mortality, insect ecology, field experimentation, edge effects, Germany
1. Inter-patch movement is usually assumed to be homogeneous across a landscape. As the intervening area between suitable patches is usually richly textured, it cannot be assumed to be uniform in real landscapes. 2. In an experimental mark-and-resight study, the movement behaviour of the bush cricket Platycleis albopunctata in four habitat types as well as at the border between two of these habitat types was observed. 3. Analysis of recapture data indicated differences in mortality risk (or emigration rates) between habitat types. 4. When released at the border between suitable habitat and a crop field, P. albopunctata did not show a consistent preference for the suitable habitat. This suggests that the crop field is at least temporarily attractive for P. albopunctata. 5. Movement in suitable habitat was not always different from movement in the matrix, and movement between different types of matrix also differed. 6. The results indicate that the movement behaviour of P. albopunctata is influenced not only by suitability for breeding but also by structural resistance and other factors (e.g. food availability or habitat-specific mortality risk).