Position, and climate

Abstract

Mires, or peat-forming systems, have traditionally been recognised as falling into two broad peat-forming types minerotrophic fens fed by groundwater or collected surface water, and ombrotrophic bogs fed exclusively by direct precipitation. Different types of fen can then be distinguished based on sources of water and rates of water supply. In contrast, ombrotrophic bogs can be classified according to their morphology, position within the landscape and consequent developmental history. A few mixed or intermediate mire types can also be identified.