| Abstract: | According to the prevailing plant species, the types of washed-ashore matter of Zostera, Ceramium-Fucus and reed can be distinguished, and in addition also Potamogeton, Cordylophora, Ectocarpus, Cladophora, Mytilus and Mya, which may be determinant in the washedashore matter for short periods of time. According to the level, there are distinguished swash marks of alternating water, flood water and storm tides. According to appearance and shape, there are distinguished threads and strips, net-like or flat deposits and dams being up to 1 m high. In the washed-ashore matter there were detected 14 plant species, 16 species of invertebrates, 12 fish species and 6 species of birds as well as 9 forms of inanimate hard substances. It is estimated that 5000 t fresh matter are washed ashore per year at a beach length of 80 km. Its natural processing and its economic utilization in former times are described. |
