Tinea cruris, most commonly known as jock itch, is a fungal infection of the skin. It belongs to a group of fungal skin infections called tinea. Like other tinea infections, jock itch is caused by mold-like fungi, which are known as dermatophytes.
Ecologists (scientists who study the relationships of organisms with their living and nonliving environment) generally recognize two kinds of succession, primary succession and secondary succession. Primary succession takes place on an area that is originally completely empty of life. As an example, an area that has been covered by a flow of lava has, for a time, no life at all on it. Over a period of time, however, various kinds of organisms begin to grow in the area.
For instance, a new community of forest trees introduces shade to its ecosystem, or a previous community of vegetation that changed the fertility of the soil. Succession may arise from the formation of new, unoccupied habitat (e.g. a lava flow or a severe landslide).This kind of succession in which the sequential development of plant or animal communities in an area where no soil initially exists is called primary succession.Succession may also be initiated by a disturbance of an existing community (e.g. fire, severe windthrow, logging).This kind of succession where communities develop in areas where soil already exists is called secondary succession.or instance, a new community of forest trees introduces shade to its ecosystem, or a previous community of vegetation that changed the fertility of the soil. Succession may arise from the formation of new, unoccupied habitat (e.g. a lava flow or a severe landslide).