Zostera

The eelgrass, or Zostera or Sea grass (lat. Zostéra) is a genus of perennial sea grasses reproducing vegetatively by means of stolons (side shoots), which are distributed radially in all directions, so that each Bush produces around itself a circular growth. It traps silt, and because of the eelgrass has a high concentration of silt, rich in sulphides. These substances are poisonous to the eelgrass, so when the sulfide begins to work, they are the oldest, inner part of the population. Because it stands out most sulphides thanks to DRS, the result is a perfectly round ring, which survive only extreme plants. The diameter of the rings typically does not exceed 15 m and the width of the grass strip — 1 m

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