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The spatial arrangement of the six habitat fragments (=subpopulations) within 1 of the 14 replicates of fragmented populations that were studied. Dark grey rectangles are the habitat patches, embedded in a matrix area (light grey), which were uninhabitable for voles. Subpopulation density trajectories over the 3.5 month breeding season for one arbitrarily chosen replicate are superimposed on the habitat fragments.
