Floating leaf zone
The floating leaf zone is part of the silting zone of a eutrophic lake. With undisturbed silting, it lies between the diving leaf zone and the reed beds . This zone is settled on eutrophic lakes and slowly flowing rivers of Central Europe by the plant-sociological group (according to Oberdorfer) of the rooting floating- leaf societies , in the plant-sociological system the association Nymphaeion Oberdorfer 1957. The most common society is the thousand-leaf pond rose society, technically the myriophyllo- Nupharetum. Character types of the society are white water lily and yellow water lily . Other typical species that are more common in other associations of the association include water feather , swamp water star , pine frond (in the forma fluitans ), sea can , water hazel , lesser pond rose and swimming pondweed . Typical companion species are, for example, whirling thousand-leaf , eared thousand-leaf , water knotweed , large mermaid , common water hose .
Plant characteristics
The plants in the floating leaf zone are anchored in the ground. As in the diving leaf zone, the leaves are carried by the water and photosynthesize . They have no protective layer and no stabilizing fabric. The leaves have only on the top stomata , so that the gas exchange through the atmosphere goes.
The leaves of the submerged ( submerged ) plants are finely slit and thus facilitate the direct absorption of minerals from the water.
Web links
Individual evidence
- ↑ Erich Oberdorfer: South German Plant Societies. Part I: Rock and wall communities, alpine corridors, water, silting and moor communities. Gustav Fischer Verlag, Jena 1992, ISBN 3-334-60416-0 , p. 108ff
- ↑ Heinz Ellenberg: The vegetation of Central Europe with the Alps , Ulmer, Stuttgart 1963, p. 391f
- ↑ Siegfried Slobodda: plant communities and their environment , source & Meyer, Heidelberg 1988, p 166