Spatial Isolation and Temporal Variation in Fitness and Condition Facilitate Divergence in a Migratory Divide
Fig 1
Density functions of the linear discriminant analysis for 2010 and 2011 combined.
The functions show the separation of territories of NW-migrants (dashed line) and SW-migrants (solid line) along the discriminant axis. NW-territories occupying the more negative part of the axis were characterized by low density of vegetation in the ground and lower shrubbery layers and low density of blooming shrubs and herbs as well as no disturbance. SW-territories located on the more positive part of the axis showed a high density of nettles, but a low vegetation density in the upper shrubbery layer.