Ecological Functions of Marsh Ecosystems (the Case of Sakhalin Island)

Abstract

The issues of ecological regulation and assessment of soils in conditions of oil pollution are discussed. The role of soils in the functioning of marsh ecosystems in the context of their ecological functions and ecosystem services is considered. An assessment of the state of marsh ecosystems and their ecological services through a hydrosphere function providing a sorption, protective barrier to migration of pollutants, as well as conditions for the normal functioning of the ecosystem based on marsh soils in the northern part of Sakhalin Island in conditions of oil pollution. It is proposed to use the migration water indicator to establish the permissible content of petroleum products in soils, in case of not exceeding which, sustainable functioning of soils is provided with preservation of the hydrosphere function. The permissible content of oil products, in which top marsh peaty soil retains its stable functioning, in terms of performing hydrosphere function, established according to the water migration index, is 60 g/kg soil; for marsh lowland peat soils – 15 g/kg.