The waterlogged soils of these forests inhibit the complete decay of leaf litter, and result in the formation of peat, which leaches humic acids and related compounds into the watercourses flowing through these forests.
32.
A forest of " S . atrocinerea " occupies the eastern end of Cortegada Island in permanently or temporarily waterlogged soils, and a mixed forest with " Alnus glutinosa " occupies the end west side.
33.
The common alder is used as a pioneer species and to stabilise river banks, to assist in flood control, to purify water in waterlogged soils and to moderate the temperature and nutrient status of water bodies.
34.
It occurs on moist, but not waterlogged soils, and is one of the transitional vegetation types around open water and alongside lowland streams; it is often found on damp verges and in ditches alongside roads and tracks.
35.
It typically grows by water and in waterlogged soils, such as by rivers, lakes and swamps in countries like Ghana and Nigeria, but is widespread across tropical Africa to Ethiopia and Sudan, and further south and east in Zimbabwe.
36.
Many of the beds observed are dull in color, indicating that they formed in a reducing environment-another sign of a floodplain depositional environment, as standing water and waterlogged soil would be present for a substantial portion of the year.
37.
In the absence of sufficient natural drainage ( as in waterlogged soils ) and without a proper leaching and drainage program to remove salts, this would lead to a high soil salinity and reduced crop yields in the long run.
38.
For more than 200 years the dearly departed have been interred above ground to keep them from floating away with the waterlogged soil, successive generations pushing old bones to the back of the tomb to make way for new ones.
39.
Impeded drainage but rarely waterlogged soil features in Addlestone, north Knaphill and around Perry Hill, Worplesdon while Chobham lies in loamy soils with naturally high groundwater producing wet acid meadow and woodland edged by streamside fen / peat marshy brooklands.
40.
Willows ( " Salix atrocinerea " ) occupy the eastern part of the island in permanently or temporarily waterlogged soils as the only tree species, mono-specific forest, and on the west side are mixed with alder ( " Alnus glutinosa " ).
