caa a22 4500 463168496 CHVBK 20180406164806.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10530-006-9061-1 doi (NATIONALLICENCE)springer-10.1007/s10530-006-9061-1 Gypsy moth response to landscape structure differs from neutral model predictions: implications for invasion monitoring [Elektronische Daten] [Geneviève Nesslage, Brian Maurer, Stuart Gage] Simulations of dispersal across computer-generated neutral landscapes have generated testable predictions about the relationship between dispersal success and landscape structure. Models predict a threshold response in dispersal success with increasing habitat fragmentation. A threshold is defined as an abrupt, disproportionate decline in dispersal success at a certain proportion of habitat in the landscape. To identify potential empirical threshold responses in invasion success to landscape structure, we quantified the relationship between progression of the gypsy moth (Lymantria dispar) invasion wavefront across Michigan (1985-1996) and the structure of the Michigan landscape using two indices of invasion success and six landscape metrics. We also examined the effect of scale of analysis and choice of land cover characterization on our results by repeating our analysis at three scales using two different land cover maps. Contrary to simulation model predictions, thresholds in invasion success did not correspond closely with thresholds in landscape structure metrics. Increased variation in invasion success indices at smaller scales of analysis also suggested that invasion success should be studied at larger spatial extents (≥75km2) than would be appropriate for characterizing individual dispersal events. The predictions of individual dispersal models across neutral landscapes may have limited applications for the monitoring and management of vagile species with excellent dispersal capabilities such as the gypsy moth. Springer Science+Business Media, Inc., 2006 Dispersal nationallicence Habitat fragmentation nationallicence Invasion nationallicence Lacunarity nationallicence Spatial scale nationallicence Thresholds nationallicence p crit : Percolation critical threshold, or proportion of habitat at which a disproportionate decline in dispersal success is observed nationallicence p : Proportion of habitat nationallicence Nesslage Geneviève Department of Fisheries and Wildlife, Michigan State University, 13 Natural Resources Building, 48824, East Lansing, MI, USA aut Maurer Brian Department of Fisheries and Wildlife, Michigan State University, 13 Natural Resources Building, 48824, East Lansing, MI, USA aut Gage Stuart Department of Entomology, Michigan State University, 208 Manly Miles Building, 48823, East Lansing, MI, USA aut Biological Invasions Kluwer Academic Publishers 9/5(2007-07-01), 585-595 1387-3547 9:5<585 2007 9 10530 https://doi.org/10.1007/s10530-006-9061-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10530-006-9061-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nesslage Geneviève Department of Fisheries and Wildlife, Michigan State University, 13 Natural Resources Building, 48824, East Lansing, MI, USA aut NATIONALLICENCE 700 1- Maurer Brian Department of Fisheries and Wildlife, Michigan State University, 13 Natural Resources Building, 48824, East Lansing, MI, USA aut NATIONALLICENCE 700 1- Gage Stuart Department of Entomology, Michigan State University, 208 Manly Miles Building, 48823, East Lansing, MI, USA aut NATIONALLICENCE 773 0- Biological Invasions Kluwer Academic Publishers 9/5(2007-07-01), 585-595 1387-3547 9:5<585 2007 9 10530 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer