GHOSTS OF HABITATS PAST: CONTRIBUTION OF LANDSCAPE CHANGE TO CURRENT HABITATS USED BY SHRUBLAND BIRDS

摘要: Models of habitat associations for species often are developed with an implicit assumption that habitats static, even though recent disturbance may have altered the landscape. We tested our hypothesis trajectory and magnitude change influenced observed distribution abundance passerine birds breeding in shrubsteppe southwestern Idaho. Birds this region live dynamic landscapes undergoing predominantly large-scale, radical, unidirectional because wildfires converting shrublands into expanses exotic annual grasslands. used data from field surveys satellite image analyses a series redundancy to partition variances determine relative contribution current landscapes. Although explained greater proportion total variation, changes measures richness texture also contributed variation Horned Larks (Eremophila alpestris), B...