Effects of landscape structure on movement patterns of the flightless bush cricket Pholidoptera griseoaptera.
Because the viability of a population may depend on whether individuals can disperse, it is important for conservation planning to understand how landscape structure affects movement behavior. Some species occur in a wide range of landscapes differing greatly in structure, and the question arises of whether these species are particularly versatile in their dispersal or whether they are composed of genetically distinct populations adapted to contrasting landscapes. We performed a capture-mark-resight experiment to study movement patterns of the flightless bush cricket Pholidoptera griseoaptera (De Geer 1773) in two contrasting agricultural landscapes in France and Switzerland. The mean daily movement of P. griseoaptera was significantly higher in the landscape with patchily distributed habitat (Switzerland) than in the landscape with greater habitat connectivity (France). Net displacement rate did not differ between the two landscapes, which we attributed to the presence of more linear elements in the connected landscape, resulting in a more directed pattern of movement by P. griseoaptera. Significant differences in the movement patterns between landscapes with contrasting structure suggest important effects of landscape structure on movement and dispersal success. The possibility of varying dispersal ability within the same species needs to be studied in more detail because this may provide important information for sustainable landscape planning aimed at maintaining viable metapopulations, especially in formerly well-connected landscapes.
Diekötter
Tim
T
Institute of Integrative Biology ETH, CH-8092 Zurich, Switzerland. tim.diekoetter@uni-giessen.de
Speelmans
Marjan
M
Dusoulier
François
F
Van Wingerden
Walter K R E
WK
Malfait
Jean-Pierre
JP
Crist
Thomas O
TO
Edwards
Peter J
PJ
Dietz
Hansjörg
H
D000818:Animals; D003247:Conservation of Natural Resources; D017753:Ecosystem; D005602:France; D009987:Orthoptera / Q000502:physiology*; D011157:Population Dynamics; D013037:Spatial Behavior; D013557:Switzerland