Sea urchins, for example, can reduce entire areas to urchin barrens.
Our f lowers were beautiful, the only adornment in that barren room.
Salt-aected soils lying barren earlier, now contribute nearly 6 6 106 t food grains from 1.5 6 106 ha reclaimed area.
The ground is bedrock or shale barrens littered with loose rock and fine soils.
The bedrock is covered by glaciolacustrine deposits which make up the sandy topsoils of the barrens.
The sea urchins then overexploited their main food source, kelp, creating urchin barrens, areas of seabed denuded of kelp, but carpeted with urchins.
The habitat consists of dry, rocky, or sandy areas, including pine barrens.
Outwash from the last of numerous glacial periods left thick glacial deposits of sand and gravel, providing the geologic foundation for globally rare pine barrens.
