The Compton Road overpass in southern Brisbane is known to be allowing passage by numerous birds, reptiles and amphibians; but what type of vegetation is providing habitat suitable for these movements? An evaluation of the reconstructed vegetation on the overpass shows that 45 species of plants were present after 4 years of growth. Most of these were in the origil planting list but over 40% have almost certainly come from salvaged tive topsoil used in the bypass construction. The resulting habitat, 4 years later, now appears similar to a typical coastal eucalypt forest secondary succession, although not yet identical to nearby forest. The current presence of a dense mid-layer of small trees and shrubs may be an important factor in allowing even the edge-avoiding species to cross the road. On-going investigation of successiol changes and the changing responses of the birds and other taxa will contribute to understanding the functiolity of such crossing structures.
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