Plant species diversity will remain lower in reclaimed habitats than in undisturbed areas. The ecosystem consists of undisturbed tropical forests. Xeric slash pine plantations seem to be preferred over undisturbed longleaf pine habitats. Rattlesnakes tend to avoid developed areas, preferring undisturbed, natural habitats. Due to surface plant litter, forests that are undisturbed have a minimal rate of erosion. Structural plains are relatively undisturbed horizontal surfaces of the Earth. Researchers used soil boring to identify promising areas with undisturbed soil. No rainforest today can be considered to be undisturbed. They are often found in areas of flood plain interspersed with undisturbed papyrus and reedbeds. The basic construction method begins by digging a trench down to undisturbed mineral subsoil. This enables the bullet to remain essentially undisturbed and trued to the case mouth. Seedlings were planted in gaps and in the undisturbed and clearcut treatment units. South Kingstown has over ten miles of undisturbed beaches. Urban tunnelling has the special requirement that the ground surface be undisturbed. The conservation of an undisturbed natural world is also extremely important to the Transcendentalists.