'Swamps' are not so easy to define. In many cases the borders with other biotopes are vague. A swamp is physically defined and physiognomically contains strongly varying vegetation types (nature types). Swamps are terrains that are not a body of water, but not solid ground either in the literal sense of the word. In general these areas have a water-saturated soil most of the year. this results in oxygen deprivation which in turn creates peat.