BIRD COMMUNITY RELATIONSHIPS TO SUCCESSION IN GREEN ASH (FRAXINUS-PENNSYLVANICA) WOODLANDS

We studied the relationship between breeding birds and seral stages of green ash (Fraxinus pennsylvanica) woodlands in central South Dakota between 1990 and 1992. Stands of early seral green ash undergoing prim ary succession had few small trees with western snowberry (Symphoricap os occidentalis) in the understory. Some early seral green ash stands resulted from retrogression and had large trees with grass understory. Late seral green ash stands were represented by greater overstory cov er consisting of green ash and chokecherry (Prunus virginiana) shrubs and small trees in the understory. Sixty-five of 81 bird species that were observed in these woodlands required woodland vegetation as part of their habitat. Tree- and shrub-nesting birds were the most common a nd were associated with late seral stages. Ground-nesting birds had mi xed relationships between early and late seral stages. Cavity-nesting birds used snags and dead tr ce branches which occurred in all seral s tages. Correlations of birds with vegetation measurements suggested ha bitat features birds may have selected for in these woodlands.