Long-term changes in the structure of underwater meadows of the Puck Lagoon

Abstract

Imti.tute of Bnmcmnmt l'mteclioo Gdlmk. l'IW!nd Considerable changes in the structure of phytobenthos occurr ed in the Puck Lagoon in the last 32 years. Furcel!aria lumbricalis Lyngb. and Fucus vesiculosus L.; previously represented in the Lagoon very abundantly, are absent at present. Up to 70% of the total biomm of the benthic vegetation are contributed by the Ectocarpaceae which grew for about 3.5 months in 1988, i.e. from April until mid-July.