Preliminary works have begun on the redevelopment of a former bakery site in Carina, despite concerns raised on habitat loss in the koala corridor.

Truck loads of debris were removed from the Fursden Road development site on Friday, as an excavator dug up concrete on a neighbouring, heavily vegetated site acquired as part of the redevelopment.

Brisbane City Council is concerned about the proposed density, layout and extent of earthworks, which planners said would adversely affect the open space, amenity and the ecological values of the site, including koala habitat.