The French Atlantic Coasts
Atlantic
Ocean
44" 10' N
Fig. 9.6. The Bay of Arcachon
yr' woody dunes
~ rivers
~ channels
-c::J intertidal zones
)I passages
fresh waters
-261
strandings of these seaweeds in the large muddy intertidal zone and on
tourist beaches. During spring tides and windy periods, large amounts of
green algae mixed with drifting Zostera are frequently deposited on the
muddy and sandy strands, where they decompose rapidly. Because it is a
nuisance for fishery and tourism, the decomposing material has to be
removed mechanically.
The collected beach cast increased from about 4000 m 3 in 1990 to
30000 m 3 in 1992, the latter containing about 6 000 m 3 of Monostroma,
indicating a rapid increase in the green tide phenomenon in this region.
According Auby et al. (1994), mass production of Enteromorpha sp.
first appeared in the Bay of Arcachon in 1982. This species had been
noted earlier at this site but in acceptable amounts. Seasonally, the
Atlantic
Ocean
44" 10' N
Fig. 9.6. The Bay of Arcachon
yr' woody dunes
~ rivers
~ channels
-c::J intertidal zones
)I passages
fresh waters
-261
strandings of these seaweeds in the large muddy intertidal zone and on
tourist beaches. During spring tides and windy periods, large amounts of
green algae mixed with drifting Zostera are frequently deposited on the
muddy and sandy strands, where they decompose rapidly. Because it is a
nuisance for fishery and tourism, the decomposing material has to be
removed mechanically.
The collected beach cast increased from about 4000 m 3 in 1990 to
30000 m 3 in 1992, the latter containing about 6 000 m 3 of Monostroma,
indicating a rapid increase in the green tide phenomenon in this region.
According Auby et al. (1994), mass production of Enteromorpha sp.
first appeared in the Bay of Arcachon in 1982. This species had been
noted earlier at this site but in acceptable amounts. Seasonally, the