Baltic Fund for Nature

Vegetation of the Skerries region

The water edge is occupied by reed grass (Phalaroides arundinacea) and sedges (mainly Carex acuta and Naumburgia thyrsiflora).

Aggregations of reed and creeping spike-rush (Eleocharis palustris) with aquatic plants deve- lop in the water near the shore.

Further into the lake submerged water plant communites emerge: Potamogeton perfoliatum and Batrachium peltatum.

Sandy littoral is a habitat of densely growing common reed and the community of reed and mixed aquatic grasses (Equisetum fluviatile, Polygonum amphibium). Further in the water they are replaced by communities dominated by Potamogeton perfoliatum and mixed aquatic grasses. In the Valaam archipelago littoral zone bulrush (Scirpus lacustris) appears in reed communities. Submerged plants are represented by perfoliate pondweed communities(Potamogeton perfoliatum).

In the mud littoral the communities of common reed, sedges (Carex vesicaria), cattail (Typha latifolia) are replaced by floating-leaf water plant communities: Potamogeton natans, Nuphar lutea. In deeper areas aggregations of submerged plants develop: Myrriophyllum spicatum, Elodea canadensis, Potamogeton perfoliatum. The communities are distributed in a mosaic pattern.

Landwards from the water edge meadows and mires develop on sandy and mud soils. Communities with Carex nigra and Calamagrostis neglecta are found closer to the water. Dryer soils get overgrown with Nardus stricta and Festuca rubra. Low-lying peatlands are occupied by sedge fens (with Carex acuta and C. lasiocarpa) and shrub stands with some willow species (Alnus incana etc., Ramenskaya,1958). Isolated pine trees (Pinus sylvestris) also occur in these habitats. In some places farmland borders on the water.

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